23LC1024T-I/ST [MICROCHIP]

STANDARD SRAM;
23LC1024T-I/ST
型号: 23LC1024T-I/ST
厂家: MICROCHIP    MICROCHIP
描述:

STANDARD SRAM

时钟 静态存储器 光电二极管 内存集成电路
文件: 总32页 (文件大小:414K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
23A1024/23LC1024  
1Mbit SPI Serial SRAM with SDI and SQI Interface  
Device Selection Table  
Part  
Number  
Temp.  
Ranges  
Dual I/O  
(SDI)  
Quad I/O  
(SQI)  
Max. Clock  
Frequency  
VCC Range  
Packages  
23A1024  
23LC1024  
1.7-2.2V  
2.5-5.5V  
I, E  
I, E  
Yes  
Yes  
Yes  
Yes  
20 MHz(1)  
20 MHz(1)  
SN, ST, P  
SN, ST, P  
Note 1: 16 MHz for E-temp.  
Features  
Description  
• SPI Bus Interface:  
- SPI compatible  
The Microchip Technology Inc. 23A1024/23LC1024  
are 1 Mbit Serial SRAM devices. The memory is  
accessed via a simple Serial Peripheral Interface (SPI)  
compatible serial bus. The bus signals required are a  
clock input (SCK), a data in line (SI) and a data out line  
(SO). Access to the device is controlled through a Chip  
Select (CS) input. Additionally, SDI (Serial Dual  
Interface) and SQI (Serial Quad Interface) is supported  
if your application needs faster data rates.  
- SDI (dual) and SQI (quad) compatible  
- 20 MHz Clock rate for all modes  
• Low-Power CMOS Technology:  
- Read Current: 3 mA at 5.5V, 20 MHz  
- Standby Current: 4 A at +85°C  
• Unlimited Read and Write Cycles  
• Zero Write Time  
This device also supports unlimited reads and writes to  
the memory array.  
• 128K x 8-bit Organization:  
- 32-byte page  
The 23A1024/23LC1024 is available in standard  
packages including 8-lead SOIC, PDIP and advanced  
8-lead TSSOP.  
• Byte, Page and Sequential Mode for Reads and  
Writes  
• High Reliability  
Package Types (not to scale)  
Temperature Ranges Supported:  
- Industrial (I):  
- Automotive (E):  
-40C to +85C  
-40C to +125C  
• RoHS Compliant  
SOIC/TSSOP/PDIP  
• 8 Lead SOIC, TSSOP and PDIP Packages  
CS  
1
8
VCC  
SO/SIO1  
SIO2  
2
3
7
6
HOLD/SIO3  
SCK  
Pin Function Table  
Name  
Function  
VSS  
4
5
SI/SIO0  
CS  
Chip Select Input Pin  
Serial Output/SDI/SQI Pin  
SQI Pin  
SO/SIO1  
SIO2  
VSS  
Ground Pin  
SI/SIO0  
SCK  
Serial Input/SDI/SQI Pin  
Serial Clock Pin  
HOLD/SIO3 Hold/SQI Pin  
VCC  
Power Supply Pin  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 1  
23A1024/23LC1024  
1.0  
ELECTRICAL CHARACTERISTICS  
(†)  
Absolute Maximum Ratings  
VCC.............................................................................................................................................................................6.5V  
All Inputs and Outputs w.r.t. VSS ........................................................................................................ -0.3V to VCC +0.3V  
Storage Temperature...............................................................................................................................-65°C to +150°C  
Ambient Temperature under Bias............................................................................................................-40°C to +125°C  
NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the  
device. This is a stress rating only and functional operation of the device at those or any other conditions above those  
indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for an  
extended period of time may affect device reliability.  
TABLE 1-1:  
DC CHARACTERISTICS  
Industrial (I):  
Automotive (E): TA = -40°C to +125°C  
TA = -40°C to +85°C  
DC CHARACTERISTICS  
Param.  
No.  
Sym.  
Characteristic  
Min.  
Typ.(3)  
Max.  
Units  
Test Conditions  
23A1024  
D001  
VCC  
Supply Voltage  
1.7  
2.5  
2.2  
5.5  
V
V
V
23LC1024  
D002  
D003  
VIH  
VIL  
High-level Input  
Voltage  
0.7VCC  
VCC + 0.3  
Low-level Input  
Voltage  
-0.3  
0.2 VCC  
0.1 VCC  
0.2  
V
V
V
23A1024  
23LC1024  
IOL = 1 mA  
D004  
D005  
VOL  
VOH  
ILI  
Low-level Output  
Voltage  
VCC - 0.5  
High-level Output  
Voltage  
±1  
±1  
V
IOH = -400 A  
Input Leakage  
Current  
A  
A  
D006  
D007  
D008  
CS = VCC, VIN = VSS OR VCC  
CS = VCC, VOUT = VSS OR VCC  
ILO  
Output Leakage  
Current  
ICC Read Operating Current  
1
3
1
10  
10  
4
mA FCLK = 20 MHz; SO = O, 2.2V  
mA FCLK = 20 MHz; SO = O, 5.5V  
ICCS  
Standby Current  
A  
A  
A  
A  
pF  
V
D009  
CS = VCC = 2.2V, Inputs tied to  
VCC or VSS, I-Temp  
4
12  
10  
20  
7
CS = VCC = 2.2V, Inputs tied to  
VCC or VSS, E-Temp  
CS = VCC = 5.5V, Inputs tied to  
VCC or VSS, I-Temp  
1.0  
CS = VCC = 5.5V, Inputs tied to  
VCC or VSS, E-Temp  
CINT  
VDR  
Input Capacitance  
D010  
D011  
VCC = 5.0V, f = 1 MHz, TA = 25°C  
(Note 1)  
RAM Data Retention  
Voltage  
(Note 2)  
Note 1: This parameter is periodically sampled and not 100% tested.  
2: This is the limit to which VCC can be lowered without losing RAM data. This parameter is periodically  
sampled and not 100% tested.  
3: Typical measurements taken at room temperature.  
DS20005142C-page 2  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
TABLE 1-2:  
AC CHARACTERISTICS  
Industrial (I):  
Automotive (E): TA = -40°C to +125°C  
TA = -40°C to +85°C  
AC CHARACTERISTICS  
Param.  
Sym.  
Characteristic  
Min.  
Max.  
Units  
Test Conditions  
No.  
1
2
FCLK Clock Frequency  
20  
16  
20  
20  
25  
32  
20  
MHz I-Temp  
MHz E-Temp  
TCSS CS Setup Time  
25  
32  
50  
25  
32  
10  
10  
25  
32  
25  
32  
25  
32  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
ns  
I-Temp  
E-Temp  
TCSH CS Hold Time  
3
4
TCSD CS Disable Time  
I-Temp  
E-Temp  
5
6
7
8
9
TSU Data Setup Time  
THD Data Hold Time  
TR  
TF  
CLK Rise Time  
CLK Fall Time  
(Note 1)  
(Note 1)  
I-Temp  
THI Clock High Time  
TLO Clock Low Time  
TCLD Clock Delay Time  
E-Temp  
I-Temp  
10  
11  
12  
E-Temp  
I-Temp  
E-Temp  
I-Temp  
TV  
Output Valid from Clock Low  
E-Temp  
(Note 1)  
13  
14  
15  
16  
THO Output Hold Time  
0
TDIS Output Disable Time  
THS HOLD Setup Time  
THH HOLD Hold Time  
10  
10  
10  
THZ HOLD Low to Output High-Z  
17  
18  
THV HOLD High to Output Valid  
50  
ns  
Note 1: This parameter is periodically sampled and not 100% tested.  
TABLE 1-3:  
AC TEST CONDITIONS  
AC Waveform  
Input Pulse Level  
0.1 VCC to 0.9 VCC  
Input Rise/Fall Time  
CL = 30 pF  
5 ns  
Timing Measurement Reference Level  
Input  
Output  
0.5 VCC  
0.5 VCC  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 3  
23A1024/23LC1024  
FIGURE 1-1: HOLD TIMING  
CS  
16  
15  
16  
15  
SCK  
17  
18  
High-Impedance  
Don’t Care  
n
SO  
n + 2  
n + 2  
n + 1  
n
n - 1  
5
n
n + 1  
n
n - 1  
SI  
HOLD  
FIGURE 1-2: SERIAL INPUT TIMING (SPI MODE)  
4
CS  
2
11  
7
3
8
SCK  
5
6
SI  
MSB in  
LSB in  
High-Impedance  
SO  
FIGURE 1-3: SERIAL OUTPUT TIMING (SPI MODE)  
CS  
3
9
10  
SCK  
12  
14  
LSB out  
13  
MSB out  
SO  
SI  
Don’t Care  
DS20005142C-page 4  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
2.3  
Read Sequence  
2.0  
2.1  
FUNCTIONAL DESCRIPTION  
Principles of Operation  
The device is selected by pulling CS low. The 8-bit  
READ instruction is transmitted to the  
23A1024/23LC1024 followed by the 24-bit address,  
with the first seven MSB’s of the address being “don’t  
care” bits. After the correct READ instruction and  
address are sent, the data stored in the memory at the  
selected address is shifted out on the SO pin.  
The 23A1024/23LC1024 is an 1 Mbit Serial SRAM  
designed to interface directly with the Serial Peripheral  
Interface (SPI) port of many of today’s popular  
microcontroller families, including Microchip’s PIC®  
microcontrollers. It may also interface with  
microcontrollers that do not have a built-in SPI port by  
using discrete I/O lines programmed properly in  
firmware to match the SPI protocol. In addition, the  
23A1024/23LC1024 is capable of operation in SDI and  
SQI modes. In SDI mode, the SI and SO data lines are  
bidirectional, allowing the transfer of two bits per clock  
pulse. In SQI mode, two additional data lines enable  
the transfer of four bits per clock pulse.  
If operating in Sequential mode, the data stored in the  
memory at the next address can be read sequentially  
by continuing to provide clock pulses. The internal  
Address Pointer is automatically incremented to the  
next higher address after each byte of data is shifted  
out. When the highest address is reached (1FFFFh),  
the address counter rolls over to address 00000h,  
allowing the read cycle to be continued indefinitely.  
The read operation is terminated by raising the CS  
pin.  
The 23A1024/23LC1024 contains an 8-bit instruction  
register. The device is accessed via the SI pin, with  
data being clocked in on the rising edge of SCK. The  
CS pin must be low for the entire operation.  
2.4  
Write Sequence  
Table 2-1 contains a list of the possible instruction  
bytes and format for device operation. All instructions,  
addresses and data are transferred MSB first, LSB last.  
Prior to any attempt to write data to the  
23A1024/23LC1024, the device must be selected by  
bringing CS low.  
Once the device is selected, the Write command can  
be started by issuing a WRITE instruction, followed by  
the 24-bit address, with the first seven MSB’s of the  
address being “don’t care” bits, and then the data to be  
written. A write is terminated by the CS being brought  
high.  
2.2  
Modes of Operation  
The 23X1024 has three modes of operation that are  
selected by setting bits 7 and 6 in the MODE register.  
The modes of operation are Byte, Page and Burst.  
Byte Operation – is selected when bits 7 and 6 in the  
MODE register are set to 00. In this mode, the  
read/write operations are limited to only one byte. The  
Command followed by the 24-bit address is clocked into  
the device and the data to/from the device is transferred  
on the next eight clocks (Figure 2-1, Figure 2-2).  
If operating in Page mode, after the initial data byte is  
shifted in, additional bytes can be shifted into the  
device. The Address Pointer is automatically  
incremented. This operation can continue for the entire  
page (32 bytes) before data will start to be overwritten.  
If operating in Sequential mode, after the initial data  
byte is shifted in, additional bytes can be clocked into  
the device. The internal Address Pointer is  
automatically incremented. When the Address Pointer  
reaches the highest address (1FFFFh), the address  
counter rolls over to (00000h). This allows the  
operation to continue indefinitely, however, previous  
data will be overwritten.  
Page Operation – is selected when bits 7 and 6 in the  
MODE register are set to 10. The 23X1024 has  
4096 pages of 32 bytes. In this mode, the read and write  
operations are limited to within the addressed page (the  
address is automatically incremented internally). If the  
data being read or written reaches the page boundary,  
then the internal address counter will increment to the  
start of the page (Figure 2-3, Figure 2-4).  
Sequential Operation – is selected when bits 7 and 6  
in the MODE register are set to 01. Sequential  
operation allows the entire array to be written to and  
read from. The internal address counter is automatically  
incremented and page boundaries are ignored. When  
the internal address counter reaches the end of the  
array, the address counter will roll over to 0x00000  
(Figure 2-5, Figure 2-6).  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 5  
23A1024/23LC1024  
TABLE 2-1:  
INSTRUCTION SET  
Hex  
Code  
Instruction Name Instruction Format  
Description  
READ  
WRITE  
EDIO  
EQIO  
RSTIO  
RDMR  
WRMR  
0000 0011  
0000 0010  
0011 1011  
0011 1000  
1111 1111  
0000 0101  
0000 0001  
0x03  
0x02  
0x3B  
0x38  
0xFF  
0x05  
0x01  
Read data from memory array beginning at selected address  
Write data to memory array beginning at selected address  
Enter Dual I/O access (enter SDI bus mode)  
Enter Quad I/O access (enter SQI bus mode)  
Reset Dual and Quad I/O access (revert to SPI bus mode)  
Read Mode Register  
Write Mode Register  
FIGURE 2-1: BYTE READ SEQUENCE (SPI MODE)  
CS  
0
1
2
3
4
5
6
7
8
9 10 11  
29 30 31 32 33 34 35 36 37 38 39  
SCK  
SI  
Instruction  
24-bit Address  
1 23 22 21 20  
0
0
0
0
0
0
1
2
1
0
Data Out  
High-Impedance  
7
6
5
4
3
2
1
0
SO  
FIGURE 2-2: BYTE WRITE SEQUENCE (SPI MODE)  
CS  
0
1
2
3
4
5
6
7
8
9 10 11  
29 30 31 32 33 34 35 36 37 38 39  
Data Byte  
SCK  
SI  
Instruction  
24-bit Address  
23 22 21 20  
0
0
0
0
0
0
1
0
2
1
0
7
6
5
4
3
2
1
0
High-Impedance  
SO  
DS20005142C-page 6  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
FIGURE 2-3: PAGE READ SEQUENCE (SPI MODE)  
CS  
0
1
2
3
4
5
6
7
8
9 10 11  
29 30 31 32 33 34 35 36 37 38 39  
SCK  
SI  
Instruction  
24-bit Address  
1 23 22 21 20  
Page X, Word Y  
0
0
0
0
0
0
1
2
1
0
Page X, Word Y  
High-Impedance  
SO  
7
6
5
4
3
2
1
0
CS  
40 41 42 43 44 45 46 47  
SCK  
SI  
Page X, Word Y+1  
Page X, Word 31  
Page X, Word 0  
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
SO  
FIGURE 2-4:  
PAGE WRITE SEQUENCE (SPI MODE)  
CS  
0
1
2
3
4
5
6
7
8
9 10 11  
29 30 31 32 33 34 35 36 37 38 39  
Page X, Word Y  
SCK  
Instruction  
24-bit Address  
0 23 22 21 20  
Page X, Word Y  
0
0
0
0
0
0
1
2
1
0
7
6
5
4
3
2
1
0
SI  
High-Impedance  
SO  
CS  
40 41 42 43 44 45 46 47  
Page X, Word Y+1  
SCK  
Page X, Word 31  
Page X, Word 0  
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
SI  
High-Impedance  
SO  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 7  
23A1024/23LC1024  
FIGURE 2-5:  
SEQUENTIAL READ SEQUENCE (SPI MODE)  
CS  
0
1
2
3
4
5
6
7
8
9 10 11  
29 30 31 32 33 34 35 36 37 38 39  
SCK  
Instruction  
24-bit Address  
23 22 21 20  
0
0
0
0
0
0
1
1
2
1
0
SI  
Page X, Word Y  
7
6
5
4
3
2
1
0
SO  
CS  
SCK  
SI  
Page X, Word 31  
Page X+1, Word 0  
Page X+1, Word 1  
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
SO  
CS  
SCK  
SI  
Page X+1, Word 31  
Page X+n, Word 1  
Page X+n, Word 31  
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
SO  
DS20005142C-page 8  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
FIGURE 2-6:  
SEQUENTIAL WRITE SEQUENCE (SPI MODE)  
CS  
0
1
2
3
4
5
6
7
8
9 10 11  
29 30 31 32 33 34 35 36 37 38 39  
Data Byte 1  
SCK  
Instruction  
24-bit Address  
0 23 22 21 20  
0
0
0
0
0
0
1
2
1
0
7
6
5
4
3
2
1
0
SI  
High-Impedance  
SO  
CS  
40 41 42 43 44 45 46 47  
Data Byte 2  
49 50 51 52 53 54 55  
Data Byte 3  
48  
7
SCK  
Data Byte n  
7
6
5
4
3
2
1
0
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
SI  
High-Impedance  
SO  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 9  
23A1024/23LC1024  
The mode bits indicate the operating mode of the  
SRAM. The possible modes of operation are:  
2.5  
Read Mode Register Instruction  
(RDMR)  
0 0= Byte mode  
The Read Mode Register instruction (RDMR) provides  
access to the MODE register. The MODE register may  
be read at any time. The MODE register is formatted as  
follows:  
1 0= Page mode  
0 1= Sequential mode (default operation)  
1 1= Reserved  
Bits 0 through 5 are reserved and should always be set  
to ‘0’.  
TABLE 2-2:  
MODE REGISTER  
7
6
5
0
4
0
3
0
2
0
1
0
0
0
See Figure 2-7 for the RDMRtiming sequence.  
W/R  
W/R  
MODE MODE  
W/R = writable/readable  
FIGURE 2-7: READ MODE REGISTER TIMING SEQUENCE (RDMR)  
CS  
0
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
SCK  
SI  
Instruction  
0
0
0
0
0
1
0
1
Data from MODE Register  
High-Impedance  
7
6
5
4
3
2
1
0
SO  
DS20005142C-page 10  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
2.6  
Write Mode Register Instruction  
(WRMR)  
The Write Mode Register instruction (WRMR) allows the  
user to write to the bits in the MODE register as shown  
in Table 2-2. This allows for setting of the Device  
operating mode. Several of the bits in the MODE  
register must be cleared to ‘0’. See Figure 2-8 for the  
WRMRtiming sequence.  
FIGURE 2-8: WRITE MODE REGISTER TIMING SEQUENCE (WRMR)  
CS  
0
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
1
15  
0
SCK  
SI  
Instruction  
Data to MODE Register  
7
6
5
4
3
2
0
0
0
0
0
0
0
1
High-Impedance  
SO  
2.7  
Power-On State  
The 23A1024/23LC1024 powers on in the following  
state:  
• The device is in low-power Standby mode  
(CS= 1)  
• A high-to-low-level transition on CS is required to  
enter active state  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 11  
23A1024/23LC1024  
3.0  
PIN DESCRIPTIONS  
The descriptions of the pins are listed in Table 3-1.  
TABLE 3-1: PIN FUNCTION TABLE  
SOIC/PDIP/TSSOP  
Symbol  
Description  
1
2
3
4
5
6
7
8
CS  
SO/SIO1  
SIO2  
Chip Select Input  
Serial Output (SPI)/Serial I/O 1 (SDI)/Serial I/O 1 (SQI)  
Serial I/O 2 (SQI)  
VSS  
Ground  
SI/SIO0  
SCK  
Serial Input (SPI)/Serial I/O 0 (SDI)/Serial I/O 0 (SQI)  
Serial Clock Input  
HOLD/SIO3  
VCC  
Hold/Serial I/O 3  
Power Supply  
FIGURE 3-1:  
SPI, SDI and SQI Pin Configurations  
SPI Mode:  
SDI Mode:  
SQI Mode:  
CS  
1
8
VCC  
CS  
1
8
VCC  
CS  
1
8
VCC  
SIO1  
NU  
2
3
4
7
6
5
HOLD  
SCK  
SO  
NU  
2
3
7
6
HOLD  
SCK  
SIO1  
SIO2  
2
3
7
6
SIO3  
SCK  
Vss  
4
5
SI  
Vss  
SIO0  
Vss  
4
5
SIO0  
Note:  
Pin 3 is not used in SPI and SDI modes, and should not be left floating (see Section 3.3 “Serial I/O  
(SIO2)”).  
3.1  
Chip Select (CS)  
3.4  
Serial Input, Serial I/O 0 (SI/SIO0)  
A low level on this pin selects the device. A high level  
deselects the device and forces it into Standby mode.  
When the device is deselected, SO goes to the  
high-impedance state, allowing multiple parts to share  
the same SPI bus. After power-up, a low level on CS is  
required, prior to any sequence being initiated.  
The SI pin is used to transfer data into the device when  
the SPI bus is being used. When in SDI or SQI bus  
modes, the SI/SIO0 pin is a bidirectional I/O pin.  
3.5  
Serial Clock (SCK)  
The SCK is used to synchronize the communication  
between master and the 23A1024/23LC1024.  
3.2  
Serial Output, Serial I/O (SO/SIO1)  
a
Instructions, addresses or data present on the SI pin  
are latched on the rising edge of the clock input, while  
data on the SO pin is updated after the falling edge of  
the clock input.  
The SO/SIO1 pin is used to transfer data out of the  
23A1024/23LC1024 when the SPI bus is being used.  
When in SDI or SQI bus modes, the SO/SIO1 pin is a  
bidirectional I/O pin. Data is shifted out on this pin after  
the falling edge of the serial clock, and it is latched in  
on the rising edge of the serial clock.  
3.6  
Hold, Serial I/O 3 (HOLD/SIO3)  
When the device is in SQI bus mode, pin HOLD/SIO3  
is a bidirectional I/O pin. When in SPI or SDI bus  
modes, the pin has the HOLD function.  
3.3  
Serial I/O 2 (SIO2)  
The SIO2 pin is a bidirectional I/O pin used only in SQI  
mode. If not using SQI bus mode, this pin should not be  
left floating. Deciding to pull the SIO2 pin high would  
allow successful recovery of the bus from SQI bus  
mode in case an accidental EQIO command has been  
registered.  
The HOLD pin is used to suspend transmission to the  
23A1024/23LC1024 while in the middle of a serial  
sequence without having to avoid retransmitting the  
entire sequence over again. It must be held high any  
time this function is not being used. Once the device is  
DS20005142C-page 12  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
selected and a serial sequence is underway, the HOLD  
pin may be pulled low to pause further serial  
communication without resetting the serial sequence.  
The HOLD pin should be brought low while SCK is low,  
otherwise the HOLD function will not be invoked until  
the  
next  
SCK  
high-to-low  
transition.  
The  
23A1024/23LC1024 must remain selected during this  
sequence. The SI and SCK levels are “don’t cares”  
during the time the device is paused and any  
transitions on these pins will be ignored. To resume  
serial communication, HOLD should be brought high  
while the SCK pin is low, otherwise serial  
communication will not be resumed until the next SCK  
high-to-low transition.  
The SO line will tri-state immediately upon a high-to low  
transition of the HOLD pin, and will begin outputting  
again immediately upon a subsequent low-to-high  
transition of the HOLD pin, independent of the state of  
SCK.  
Hold functionality is not available when operating in  
SQI bus mode.  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 13  
23A1024/23LC1024  
4.0  
DUAL AND QUAD SERIAL  
MODE  
The 23A1024/23LC1024 also supports SDI (Serial  
Dual) and SQI (Serial Quad) mode of operation when  
used with compatible master devices. As a convention  
for SDI mode of operation, two bits are entered per  
clock using the SIO0 and SIO1 pins. Bits are clocked  
MSB first.  
For SQI mode of operation, four bits of data are entered  
per clock, or one nibble per clock. The nibbles are  
clocked MSB first.  
4.1  
Dual Interface Mode  
The 23A1024/23LC1024 supports Serial Dual Input  
(SDI) mode of operation. To enter SDI mode the EDIO  
command must be clocked in (Figure 4-1). It should be  
noted that if the MCU resets before the SRAM, the user  
will need to determine the serial mode of operation of  
the SRAM and reset it accordingly. Byte read and write  
sequence in SDI mode is shown in Figure 4-2 and  
Figure 4-3.  
FIGURE 4-1: ENTER SDI MODE (EDIO) FROM SPI MODE  
CS  
0
1
2
3
4
5
6
7
SCK  
0
0
1
1
1
0
1
1
SI  
High-Impedance  
SO  
DS20005142C-page 14  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
FIGURE 4-2:  
BYTE READ MODE SDI  
CS  
21 22 23  
9 10 11 12 13 14 15 16 17 18 19 20  
0
1
2
3
4
5
6
7
8
SCK  
0
0
1
0
0
0
14 12 10  
8
6
7
4
5
2
3
6
7
4
2
22 20 18 16  
1
1
SIO0  
24-Bit Address  
Instruction  
Dummy Byte  
Data Out  
1
0
0
15 13 11  
23 21 19 17  
9
5
3
0
SIO1  
Note 1: Page and Sequential mode are similar in that additional bytes can be clocked out before CS is  
brought high.  
2: The first byte read after the address will be a dummy byte.  
FIGURE 4-3:  
BYTE WRITE MODE SDI  
CS  
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19  
SCK  
SIO0  
SIO1  
8
6
7
4
5
2
3
0
1
6
7
0
1
2
0
0
18 16  
14 12  
10  
4
0
22 20  
23 21  
0
0
24-Bit Address  
Instruction  
Data In  
0
0
9
3
19 17 15 13 11  
5
1
Note:  
Page and Sequential mode are similar in that additional bytes can be clocked in before CS is brought high.  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 15  
23A1024/23LC1024  
4.2  
Quad Interface Mode  
In addition to the Serial Dual interface (SDI) mode of  
operation Serial Quad Interface (SQI) is also  
supported. In this mode the HOLD functionality is not  
available. To enter SQI mode the EQIO command must  
be clocked in (Figure 4-4).  
FIGURE 4-4:  
ENTER SQI MODE (EQIO) FROM SPI MODE  
CS  
0
1
2
3
4
5
6
7
SCK  
0
0
1
1
1
0
0
0
SI  
High-Impedance  
SO  
FIGURE 4-5:  
BYTE READ MODE SQI  
CS  
0
1
2
3
4
5
6
7
8
9
10  
4
11  
0
SCK  
SIO0  
0
1
4
0
20 16 12  
8
SIO1  
0
5
6
7
1
2
3
1
5
6
1
2
21 17  
22 18  
13  
14  
15  
9
SIO2  
SIO3  
0
0
10  
0
0
7
3
23  
19  
11  
Data Out  
24-Bit Address  
Dummy Byte  
Instruction  
Note 1: Page and Sequential mode is similar in that additional bytes can be clocked out before CS is  
brought high.  
2: The first byte read after the address will be a dummy byte.  
DS20005142C-page 16  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
FIGURE 4-6:  
BYTE WRITE MODE SQI  
CS  
0
1
2
3
4
5
6
7
8
9
SCK  
0
0
4
5
0
1
4
5
0
1
20 16 12  
8
SIO0  
0
0
1
0
21 17 13  
9
SIO1  
6
7
2
3
6
2
22 18 14 10  
SIO2  
SIO3  
0
0
7
3
23 19 15 11  
24-Bit Address  
Instruction  
Data In  
Note:  
Page and Sequential mode are similar in that additional bytes can be clocked out before CS is  
brought high.  
4.3  
Exit SDI or SQI Mode  
To exit from SDI mode, the RSTIO command must be  
issued. The command must be entered in the current  
device configuration, either SDI or SQI, see Figure 4-7  
and Figure 4-8.  
FIGURE 4-7:  
RESET SDI MODE (RSTIO) – FROM SDI MODE  
CS  
0
1
2
3
SCK  
1
1
1
1
SIO0  
SIO1  
1
1
1
1
2012-2015 Microchip Technology Inc.  
DS20005142C-page 17  
23A1024/23LC1024  
FIGURE 4-8:  
RESET SDI/SQI MODE (RSTIO) – FROM SQI MODE  
CS  
0
1
SCK  
1
1
1
SIO0  
SIO1  
1
1
1
1
SIO2  
SIO3  
1
DS20005142C-page 18  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
5.0  
5.1  
PACKAGING INFORMATION  
Package Marking Information  
Example:  
23A1024  
8-Lead PDIP  
XXXXXXXX  
T/XXXNNN  
I/P  
e
3
1L7  
1343  
YYWW  
8-Lead SOIC (3.90 mm)  
Example:  
23A1024I  
XXXXXXXT  
XXXXYYWW  
SN  
1328  
e
3
NNN  
1L7  
Example:  
3ABI  
8-Lead TSSOP  
XXXT  
YYWW  
1328  
1L7  
NNN  
1st Line Marking Codes  
Part Number  
PDIP  
SOIC  
TSSOP  
23A1024  
23LC1024  
Note:  
23A1024  
23LC1024  
23A1024T  
23LCBT  
3ABT  
3LBT  
T = Temperature grade (I, E)  
Legend: XX...X Part number or part number code  
T
Temperature (I, E)  
Y
Year code (last digit of calendar year)  
Year code (last 2 digits of calendar year)  
Week code (week of January 1 is week ‘01’)  
YY  
WW  
NNN  
Alphanumeric traceability code (2 characters for small packages)  
Pb-free JEDEC® designator for Matte Tin (Sn)  
e
3
Note: For very small packages with no room for the Pb-free JEDEC® designator  
, the marking will only appear on the outer carton or reel label.  
e
3
Note: In the event the full Microchip part number cannot be marked on one line, it will  
be carried over to the next line, thus limiting the number of available  
characters for customer-specific information.  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 19  
23A1024/23LC1024  
ꢀꢁꢂꢃꢄꢅꢆꢇꢈꢄꢉꢊꢋꢌꢆꢍꢎꢄꢈꢆꢏꢐꢁꢂꢋꢐꢃꢆꢑꢇꢒꢆꢓꢆꢔꢕꢕꢆꢖꢋꢈꢆꢗꢘꢅꢙꢆꢚꢇꢍꢏꢇꢛ  
ꢜꢘꢊꢃꢝ ꢬꢕꢐꢅꢏꢘꢌꢅꢑꢕꢇꢏꢅꢖꢈꢐꢐꢌꢄꢏꢅꢡꢉꢖꢭꢉꢜꢌꢅꢋꢐꢉꢗꢃꢄꢜꢇꢓꢅꢡꢊꢌꢉꢇꢌꢅꢇꢌꢌꢅꢏꢘꢌꢅꢢꢃꢖꢐꢕꢖꢘꢃꢡꢅꢂꢉꢖꢭꢉꢜꢃꢄꢜꢅꢛꢡꢌꢖꢃꢎꢃꢖꢉꢏꢃꢕꢄꢅꢊꢕꢖꢉꢏꢌꢋꢅꢉꢏꢅ  
ꢘꢏꢏꢡꢪꢮꢮꢗꢗꢗꢁꢑꢃꢖꢐꢕꢖꢘꢃꢡꢁꢖꢕꢑꢮꢡꢉꢖꢭꢉꢜꢃꢄꢜ  
N
NOTE 1  
E1  
3
1
2
D
E
A2  
A
L
A1  
c
e
eB  
b1  
b
ꢯꢄꢃꢏꢇ  
ꢰꢱꢝꢲꢠꢛ  
ꢟꢃꢑꢌꢄꢇꢃꢕꢄꢅꢳꢃꢑꢃꢏꢇ  
ꢢꢰꢱ  
ꢱꢴꢢ  
ꢁꢀꢣꢣꢅꢩꢛꢝ  
ꢁꢀꢞꢣ  
ꢁꢞꢀꢣ  
ꢁꢙꢨꢣ  
ꢁꢞꢺꢨ  
ꢁꢀꢞꢣ  
ꢁꢣꢀꢣ  
ꢁꢣꢺꢣ  
ꢁꢣꢀꢶ  
ꢢꢦꢵ  
ꢱꢈꢑꢔꢌꢐꢅꢕꢎꢅꢂꢃꢄꢇ  
ꢂꢃꢏꢖꢘ  
ꢡꢅꢏꢕꢅꢛꢌꢉꢏꢃꢄꢜꢅꢂꢊꢉꢄꢌ  
ꢢꢕꢊꢋꢌꢋꢅꢂꢉꢖꢭꢉꢜꢌꢅꢫꢘꢃꢖꢭꢄꢌꢇꢇ  
ꢩꢉꢇꢌꢅꢏꢕꢅꢛꢌꢉꢏꢃꢄꢜꢅꢂꢊꢉꢄꢌ  
ꢛꢘꢕꢈꢊꢋꢌꢐꢅꢏꢕꢅꢛꢘꢕꢈꢊꢋꢌꢐꢅꢹꢃꢋꢏꢘ  
ꢢꢕꢊꢋꢌꢋꢅꢂꢉꢖꢭꢉꢜꢌꢅꢹꢃꢋꢏꢘ  
ꢴꢆꢌꢐꢉꢊꢊꢅꢳꢌꢄꢜꢏꢘ  
ꢦꢙ  
ꢦꢀ  
ꢠꢀ  
ꢔꢀ  
ꢌꢩ  
ꢁꢙꢀꢣ  
ꢁꢀꢸꢨ  
ꢁꢀꢀꢨ  
ꢁꢣꢀꢨ  
ꢁꢙꢸꢣ  
ꢁꢙꢥꢣ  
ꢁꢞꢥꢶ  
ꢁꢀꢀꢨ  
ꢁꢣꢣꢶ  
ꢁꢣꢥꢣ  
ꢁꢣꢀꢥ  
ꢁꢞꢙꢨ  
ꢁꢙꢶꢣ  
ꢁꢥꢣꢣ  
ꢁꢀꢨꢣ  
ꢁꢣꢀꢨ  
ꢁꢣꢻꢣ  
ꢁꢣꢙꢙ  
ꢁꢥꢞꢣ  
ꢫꢃꢡꢅꢏꢕꢅꢛꢌꢉꢏꢃꢄꢜꢅꢂꢊꢉꢄꢌ  
ꢳꢌꢉꢋꢅꢫꢘꢃꢖꢭꢄꢌꢇꢇ  
ꢯꢡꢡꢌꢐꢅꢳꢌꢉꢋꢅꢹꢃꢋꢏꢘ  
ꢳꢕꢗꢌꢐꢅꢳꢌꢉꢋꢅꢹꢃꢋꢏꢘ  
ꢴꢆꢌꢐꢉꢊꢊꢅꢼꢕꢗꢅꢛꢡꢉꢖꢃꢄꢜꢅꢅꢚ  
ꢜꢘꢊꢃꢉꢝ  
ꢀꢁ ꢂꢃꢄꢅꢀꢅꢆꢃꢇꢈꢉꢊꢅꢃꢄꢋꢌꢍꢅꢎꢌꢉꢏꢈꢐꢌꢅꢑꢉꢒꢅꢆꢉꢐꢒꢓꢅꢔꢈꢏꢅꢑꢈꢇꢏꢅꢔꢌꢅꢊꢕꢖꢉꢏꢌꢋꢅꢗꢃꢏꢘꢅꢏꢘꢌꢅꢘꢉꢏꢖꢘꢌꢋꢅꢉꢐꢌꢉꢁ  
ꢙꢁ ꢚꢅꢛꢃꢜꢄꢃꢎꢃꢖꢉꢄꢏꢅꢝꢘꢉꢐꢉꢖꢏꢌꢐꢃꢇꢏꢃꢖꢁ  
ꢞꢁ ꢟꢃꢑꢌꢄꢇꢃꢕꢄꢇꢅꢟꢅꢉꢄꢋꢅꢠꢀꢅꢋꢕꢅꢄꢕꢏꢅꢃꢄꢖꢊꢈꢋꢌꢅꢑꢕꢊꢋꢅꢎꢊꢉꢇꢘꢅꢕꢐꢅꢡꢐꢕꢏꢐꢈꢇꢃꢕꢄꢇꢁꢅꢢꢕꢊꢋꢅꢎꢊꢉꢇꢘꢅꢕꢐꢅꢡꢐꢕꢏꢐꢈꢇꢃꢕꢄꢇꢅꢇꢘꢉꢊꢊꢅꢄꢕꢏꢅꢌꢍꢖꢌꢌꢋꢅꢁꢣꢀꢣꢤꢅꢡꢌꢐꢅꢇꢃꢋꢌꢁ  
ꢥꢁ ꢟꢃꢑꢌꢄꢇꢃꢕꢄꢃꢄꢜꢅꢉꢄꢋꢅꢏꢕꢊꢌꢐꢉꢄꢖꢃꢄꢜꢅꢡꢌꢐꢅꢦꢛꢢꢠꢅꢧꢀꢥꢁꢨꢢꢁ  
ꢩꢛꢝꢪꢅꢩꢉꢇꢃꢖꢅꢟꢃꢑꢌꢄꢇꢃꢕꢄꢁꢅꢫꢘꢌꢕꢐꢌꢏꢃꢖꢉꢊꢊꢒꢅꢌꢍꢉꢖꢏꢅꢆꢉꢊꢈꢌꢅꢇꢘꢕꢗꢄꢅꢗꢃꢏꢘꢕꢈꢏꢅꢏꢕꢊꢌꢐꢉꢄꢖꢌꢇꢁ  
ꢢꢃꢖꢐꢕꢖꢘꢃꢡ ꢖꢘꢄꢕꢊꢕꢜꢒ ꢟꢐꢉꢗꢃꢄꢜ ꢝꢣꢥꢽꢣꢀꢶꢩ  
DS20005142C-page 20  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
Note: For the most current package drawings, please see the Microchip Packaging Specification located at  
http://www.microchip.com/packaging  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 21  
23A1024/23LC1024  
Note: For the most current package drawings, please see the Microchip Packaging Specification located at  
http://www.microchip.com/packaging  
DS20005142C-page 22  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
ꢀꢁꢂꢃꢄꢅꢆꢇꢈꢄꢉꢊꢋꢌꢆꢞꢖꢄꢈꢈꢆꢟꢎꢊꢈꢋꢐꢃꢆꢑꢞꢜꢒꢆꢓꢆꢜꢄꢠꢠꢘꢡꢢꢆꢔꢣꢤꢕꢆꢖꢖꢆꢗꢘꢅꢙꢆꢚꢞꢟꢏꢥꢛ  
ꢜꢘꢊꢃꢝ ꢬꢕꢐꢅꢏꢘꢌꢅꢑꢕꢇꢏꢅꢖꢈꢐꢐꢌꢄꢏꢅꢡꢉꢖꢭꢉꢜꢌꢅꢋꢐꢉꢗꢃꢄꢜꢇꢓꢅꢡꢊꢌꢉꢇꢌꢅꢇꢌꢌꢅꢏꢘꢌꢅꢢꢃꢖꢐꢕꢖꢘꢃꢡꢅꢂꢉꢖꢭꢉꢜꢃꢄꢜꢅꢛꢡꢌꢖꢃꢎꢃꢖꢉꢏꢃꢕꢄꢅꢊꢕꢖꢉꢏꢌꢋꢅꢉꢏꢅ  
ꢘꢏꢏꢡꢪꢮꢮꢗꢗꢗꢁꢑꢃꢖꢐꢕꢖꢘꢃꢡꢁꢖꢕꢑꢮꢡꢉꢖꢭꢉꢜꢃꢄꢜ  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 23  
23A1024/23LC1024  
ꢀꢁꢂꢃꢄꢅꢆꢇꢈꢄꢉꢊꢋꢌꢆꢦꢧꢋꢐꢆꢞꢧꢠꢋꢐꢨꢆꢞꢖꢄꢈꢈꢆꢟꢎꢊꢈꢋꢐꢃꢆꢑꢞꢦꢒꢆꢓꢆꢩꢣꢩꢆꢖꢖꢆꢗꢘꢅꢙꢆꢚꢦꢞꢞꢟꢇꢛ  
ꢜꢘꢊꢃꢝ ꢬꢕꢐꢅꢏꢘꢌꢅꢑꢕꢇꢏꢅꢖꢈꢐꢐꢌꢄꢏꢅꢡꢉꢖꢭꢉꢜꢌꢅꢋꢐꢉꢗꢃꢄꢜꢇꢓꢅꢡꢊꢌꢉꢇꢌꢅꢇꢌꢌꢅꢏꢘꢌꢅꢢꢃꢖꢐꢕꢖꢘꢃꢡꢅꢂꢉꢖꢭꢉꢜꢃꢄꢜꢅꢛꢡꢌꢖꢃꢎꢃꢖꢉꢏꢃꢕꢄꢅꢊꢕꢖꢉꢏꢌꢋꢅꢉꢏꢅ  
ꢘꢏꢏꢡꢪꢮꢮꢗꢗꢗꢁꢑꢃꢖꢐꢕꢖꢘꢃꢡꢁꢖꢕꢑꢮꢡꢉꢖꢭꢉꢜꢃꢄꢜ  
D
N
E
E1  
NOTE 1  
1
2
b
e
c
φ
A
A2  
A1  
L
L1  
ꢯꢄꢃꢏꢇ  
ꢢꢰꢳꢳꢰꢢꢠꢫꢠꢼꢛ  
ꢟꢃꢑꢌꢄꢇꢃꢕꢄꢅꢳꢃꢑꢃꢏꢇ  
ꢢꢰꢱ  
ꢱꢴꢢ  
ꢢꢦꢵ  
ꢱꢈꢑꢔꢌꢐꢅꢕꢎꢅꢂꢃꢄꢇ  
ꢂꢃꢏꢖꢘ  
ꢣꢁꢺꢨꢅꢩꢛꢝ  
ꢴꢆꢌꢐꢉꢊꢊꢅꢲꢌꢃꢜꢘꢏ  
ꢢꢕꢊꢋꢌꢋꢅꢂꢉꢖꢭꢉꢜꢌꢅꢫꢘꢃꢖꢭꢄꢌꢇꢇ  
ꢛꢏꢉꢄꢋꢕꢎꢎꢅ  
ꢣꢁꢶꢣ  
ꢣꢁꢣꢨ  
ꢀꢁꢣꢣ  
ꢀꢁꢙꢣ  
ꢀꢁꢣꢨ  
ꢣꢁꢀꢨ  
ꢦꢙ  
ꢦꢀ  
ꢴꢆꢌꢐꢉꢊꢊꢅꢹꢃꢋꢏꢘ  
ꢺꢁꢥꢣꢅꢩꢛꢝ  
ꢢꢕꢊꢋꢌꢋꢅꢂꢉꢖꢭꢉꢜꢌꢅꢹꢃꢋꢏꢘ  
ꢢꢕꢊꢋꢌꢋꢅꢂꢉꢖꢭꢉꢜꢌꢅꢳꢌꢄꢜꢏꢘ  
ꢬꢕꢕꢏꢅꢳꢌꢄꢜꢏꢘ  
ꢠꢀ  
ꢥꢁꢞꢣ  
ꢙꢁꢸꢣ  
ꢣꢁꢥꢨ  
ꢥꢁꢥꢣ  
ꢞꢁꢣꢣ  
ꢣꢁꢺꢣ  
ꢥꢁꢨꢣ  
ꢞꢁꢀꢣ  
ꢣꢁꢻꢨ  
ꢬꢕꢕꢏꢡꢐꢃꢄꢏ  
ꢬꢕꢕꢏꢅꢦꢄꢜꢊꢌ  
ꢳꢌꢉꢋꢅꢫꢘꢃꢖꢭꢄꢌꢇꢇ  
ꢳꢌꢉꢋꢅꢹꢃꢋꢏꢘ  
ꢳꢀ  
ꢀꢁꢣꢣꢅꢼꢠꢬ  
ꢣꢾ  
ꢣꢁꢣꢸ  
ꢣꢁꢀꢸ  
ꢶꢾ  
ꢣꢁꢙꢣ  
ꢣꢁꢞꢣ  
ꢜꢘꢊꢃꢉꢝ  
ꢀꢁ ꢂꢃꢄꢅꢀꢅꢆꢃꢇꢈꢉꢊꢅꢃꢄꢋꢌꢍꢅꢎꢌꢉꢏꢈꢐꢌꢅꢑꢉꢒꢅꢆꢉꢐꢒꢓꢅꢔꢈꢏꢅꢑꢈꢇꢏꢅꢔꢌꢅꢊꢕꢖꢉꢏꢌꢋꢅꢗꢃꢏꢘꢃꢄꢅꢏꢘꢌꢅꢘꢉꢏꢖꢘꢌꢋꢅꢉꢐꢌꢉꢁ  
ꢙꢁ ꢟꢃꢑꢌꢄꢇꢃꢕꢄꢇꢅꢟꢅꢉꢄꢋꢅꢠꢀꢅꢋꢕꢅꢄꢕꢏꢅꢃꢄꢖꢊꢈꢋꢌꢅꢑꢕꢊꢋꢅꢎꢊꢉꢇꢘꢅꢕꢐꢅꢡꢐꢕꢏꢐꢈꢇꢃꢕꢄꢇꢁꢅꢢꢕꢊꢋꢅꢎꢊꢉꢇꢘꢅꢕꢐꢅꢡꢐꢕꢏꢐꢈꢇꢃꢕꢄꢇꢅꢇꢘꢉꢊꢊꢅꢄꢕꢏꢅꢌꢍꢖꢌꢌꢋꢅꢣꢁꢀꢨꢅꢑꢑꢅꢡꢌꢐꢅꢇꢃꢋꢌꢁ  
ꢞꢁ ꢟꢃꢑꢌꢄꢇꢃꢕꢄꢃꢄꢜꢅꢉꢄꢋꢅꢏꢕꢊꢌꢐꢉꢄꢖꢃꢄꢜꢅꢡꢌꢐꢅꢦꢛꢢꢠꢅꢧꢀꢥꢁꢨꢢꢁ  
ꢩꢛꢝꢪ ꢩꢉꢇꢃꢖꢅꢟꢃꢑꢌꢄꢇꢃꢕꢄꢁꢅꢫꢘꢌꢕꢐꢌꢏꢃꢖꢉꢊꢊꢒꢅꢌꢍꢉꢖꢏꢅꢆꢉꢊꢈꢌꢅꢇꢘꢕꢗꢄꢅꢗꢃꢏꢘꢕꢈꢏꢅꢏꢕꢊꢌꢐꢉꢄꢖꢌꢇꢁ  
ꢼꢠꢬꢪ ꢼꢌꢎꢌꢐꢌꢄꢖꢌꢅꢟꢃꢑꢌꢄꢇꢃꢕꢄꢓꢅꢈꢇꢈꢉꢊꢊꢒꢅꢗꢃꢏꢘꢕꢈꢏꢅꢏꢕꢊꢌꢐꢉꢄꢖꢌꢓꢅꢎꢕꢐꢅꢃꢄꢎꢕꢐꢑꢉꢏꢃꢕꢄꢅꢡꢈꢐꢡꢕꢇꢌꢇꢅꢕꢄꢊꢒꢁ  
ꢢꢃꢖꢐꢕꢖꢘꢃꢡ ꢖꢘꢄꢕꢊꢕꢜꢒ ꢟꢐꢉꢗꢃꢄꢜ ꢝꢣꢥꢽꢣꢶꢺꢩ  
DS20005142C-page 24  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
Note: For the most current package drawings, please see the Microchip Packaging Specification located at  
http://www.microchip.com/packaging  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 25  
23A1024/23LC1024  
APPENDIX A: REVISION HISTORY  
Revision A (July 2012)  
Initial release.  
Revision B (November 2013)  
Added E-temp specs.  
Revision C (January 2015)  
• Updated Features section.  
• Updated Description section.  
• Updated Section 2.0, Functional Description.  
• Updated Table 2-1.  
• Updated Section 3.0, Pin Descriptions.  
• Updated Table 3-1.  
• Updated Section 4.0, Dual and Quad Serial  
Mode.  
• Minor typographical corrections.  
DS20005142C-page 26  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
THE MICROCHIP WEB SITE  
CUSTOMER SUPPORT  
Microchip provides online support via our WWW site at  
www.microchip.com. This web site is used as a means  
to make files and information easily available to  
customers. Accessible by using your favorite Internet  
browser, the web site contains the following  
information:  
Users of Microchip products can receive assistance  
through several channels:  
• Distributor or Representative  
• Local Sales Office  
• Field Application Engineer (FAE)  
Technical Support  
Product Support – Data sheets and errata,  
application notes and sample programs, design  
resources, user’s guides and hardware support  
documents, latest software releases and archived  
software  
Customers  
should  
contact  
their  
distributor,  
representative or Field Application Engineer (FAE) for  
support. Local sales offices are also available to help  
customers. A listing of sales offices and locations is  
included in the back of this document.  
General Technical Support – Frequently Asked  
Questions (FAQ), technical support requests,  
online discussion groups, Microchip consultant  
program member listing  
Technical support is available through the web site  
at: http://microchip.com/support  
Business of Microchip – Product selector and  
ordering guides, latest Microchip press releases,  
listing of seminars and events, listings of  
Microchip sales offices, distributors and factory  
representatives  
CUSTOMER CHANGE NOTIFICATION  
SERVICE  
Microchip’s customer notification service helps keep  
customers current on Microchip products. Subscribers  
will receive e-mail notification whenever there are  
changes, updates, revisions or errata related to a  
specified product family or development tool of interest.  
To register, access the Microchip web site at  
www.microchip.com. Under “Support”, click on  
“Customer Change Notification” and follow the  
registration instructions.  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 27  
23A1024/23LC1024  
NOTES:  
DS20005142C-page 28  
2012-2015 Microchip Technology Inc.  
23A1024/23LC1024  
PRODUCT IDENTIFICATION SYSTEM  
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. Not all possible ordering options  
are shown below..  
PART NO.  
Device  
X
/XX  
X
Examples:  
Tape & Reel  
Package  
Temp Range  
a)  
23A1024-I/ST = 1 Mbit, 1.7-2.2V Serial SRAM,  
Industrial temp., TSSOP package  
b)  
23LC1024T-I/SN = 1 Mbit, 2.5-5.5V Serial  
SRAM, Industrial temp., Tape & Reel, SOIC  
package  
Device:  
23A1024 =  
23LC1024 =  
1 Mbit, 1.7 - 2.2V, SPI Serial SRAM  
1 Mbit, 2.5 - 5.5V, SPI Serial SRAM  
c)  
d)  
e)  
23LC1024-I/P = 1 Mbit, 2.5-5.5V Serial SRAM,  
Industrial temp., PDIP package  
23A1024-E/ST  
= 1 Mbit, 1.7-2.2V Serial  
SRAM, Extended temp., TSSOP package  
23LC1024T-E/SN = 1 Mbit, 2.5-5.5V Serial  
SRAM, Extended temp., Tape & Reel, SOIC  
package  
Tape & Reel: Blank  
=
=
Standard packaging (tube)  
Tape & Reel  
T
Temperature  
Range:  
I
E
=
=
-40C to +85C  
-40C to +125C  
f)  
23LC1024-E/P  
= 1 Mbit, 2.5-5.5V Serial  
SRAM, Extended temp., PDIP package  
Package:  
SN  
ST  
P
=
=
=
Plastic SOIC (3.90 mm body), 8-lead  
Plastic TSSOP (4.4 mm body), 8-lead  
Plastic PDIP (300 mil body), 8-lead  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 29  
23A1024/23LC1024  
NOTES:  
DS20005142C-page 30  
2012-2015 Microchip Technology Inc.  
Note the following details of the code protection feature on Microchip devices:  
Microchip products meet the specification contained in their particular Microchip Data Sheet.  
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the  
intended manner and under normal conditions.  
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our  
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data  
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.  
Microchip is willing to work with the customer who is concerned about the integrity of their code.  
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not  
mean that we are guaranteeing the product as “unbreakable.”  
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our  
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts  
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.  
Information contained in this publication regarding device  
applications and the like is provided only for your convenience  
and may be superseded by updates. It is your responsibility to  
ensure that your application meets with your specifications.  
MICROCHIP MAKES NO REPRESENTATIONS OR  
WARRANTIES OF ANY KIND WHETHER EXPRESS OR  
IMPLIED, WRITTEN OR ORAL, STATUTORY OR  
OTHERWISE, RELATED TO THE INFORMATION,  
INCLUDING BUT NOT LIMITED TO ITS CONDITION,  
QUALITY, PERFORMANCE, MERCHANTABILITY OR  
FITNESS FOR PURPOSE. Microchip disclaims all liability  
arising from this information and its use. Use of Microchip  
devices in life support and/or safety applications is entirely at  
the buyer’s risk, and the buyer agrees to defend, indemnify and  
hold harmless Microchip from any and all damages, claims,  
suits, or expenses resulting from such use. No licenses are  
conveyed, implicitly or otherwise, under any Microchip  
intellectual property rights.  
Trademarks  
The Microchip name and logo, the Microchip logo, dsPIC,  
FlashFlex, flexPWR, JukeBlox, KEELOQ, KEELOQ logo, Kleer,  
LANCheck, MediaLB, MOST, MOST logo, MPLAB,  
32  
OptoLyzer, PIC, PICSTART, PIC logo, RightTouch, SpyNIC,  
SST, SST Logo, SuperFlash and UNI/O are registered  
trademarks of Microchip Technology Incorporated in the  
U.S.A. and other countries.  
The Embedded Control Solutions Company and mTouch are  
registered trademarks of Microchip Technology Incorporated  
in the U.S.A.  
Analog-for-the-Digital Age, BodyCom, chipKIT, chipKIT logo,  
CodeGuard, dsPICDEM, dsPICDEM.net, ECAN, In-Circuit  
Serial Programming, ICSP, Inter-Chip Connectivity, KleerNet,  
KleerNet logo, MiWi, MPASM, MPF, MPLAB Certified logo,  
MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code  
Generation, PICDEM, PICDEM.net, PICkit, PICtail,  
RightTouch logo, REAL ICE, SQI, Serial Quad I/O, Total  
Endurance, TSHARC, USBCheck, VariSense, ViewSpan,  
WiperLock, Wireless DNA, and ZENA are trademarks of  
Microchip Technology Incorporated in the U.S.A. and other  
countries.  
SQTP is a service mark of Microchip Technology Incorporated  
in the U.S.A.  
Silicon Storage Technology is a registered trademark of  
Microchip Technology Inc. in other countries.  
GestIC is a registered trademarks of Microchip Technology  
Germany II GmbH & Co. KG, a subsidiary of Microchip  
Technology Inc., in other countries.  
All other trademarks mentioned herein are property of their  
respective companies.  
© 2012-2015, Microchip Technology Incorporated, Printed in  
the U.S.A., All Rights Reserved.  
ISBN: 978-1-63276-967-1  
QUALITY MANAGEMENT SYSTEM  
CERTIFIED BY DNV  
Microchip received ISO/TS-16949:2009 certification for its worldwide  
headquarters, design and wafer fabrication facilities in Chandler and  
Tempe, Arizona; Gresham, Oregon and design centers in California  
and India. The Company’s quality system processes and procedures  
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping  
devices, Serial EEPROMs, microperipherals, nonvolatile memory and  
analog products. In addition, Microchip’s quality system for the design  
and manufacture of development systems is ISO 9001:2000 certified.  
== ISO/TS 16949 ==  
2012-2015 Microchip Technology Inc.  
DS20005142C-page 31  
Worldwide Sales and Service  
AMERICAS  
ASIA/PACIFIC  
ASIA/PACIFIC  
EUROPE  
Corporate Office  
2355 West Chandler Blvd.  
Chandler, AZ 85224-6199  
Tel: 480-792-7200  
Fax: 480-792-7277  
Technical Support:  
http://www.microchip.com/  
support  
Asia Pacific Office  
Suites 3707-14, 37th Floor  
Tower 6, The Gateway  
Harbour City, Kowloon  
Hong Kong  
Tel: 852-2943-5100  
Fax: 852-2401-3431  
India - Bangalore  
Tel: 91-80-3090-4444  
Fax: 91-80-3090-4123  
Austria - Wels  
Tel: 43-7242-2244-39  
Fax: 43-7242-2244-393  
Denmark - Copenhagen  
Tel: 45-4450-2828  
Fax: 45-4485-2829  
India - New Delhi  
Tel: 91-11-4160-8631  
Fax: 91-11-4160-8632  
France - Paris  
Tel: 33-1-69-53-63-20  
Fax: 33-1-69-30-90-79  
India - Pune  
Tel: 91-20-3019-1500  
Australia - Sydney  
Tel: 61-2-9868-6733  
Fax: 61-2-9868-6755  
Web Address:  
www.microchip.com  
Japan - Osaka  
Tel: 81-6-6152-7160  
Fax: 81-6-6152-9310  
Germany - Dusseldorf  
Tel: 49-2129-3766400  
Atlanta  
Duluth, GA  
Tel: 678-957-9614  
Fax: 678-957-1455  
China - Beijing  
Tel: 86-10-8569-7000  
Fax: 86-10-8528-2104  
Germany - Munich  
Tel: 49-89-627-144-0  
Fax: 49-89-627-144-44  
Japan - Tokyo  
Tel: 81-3-6880- 3770  
Fax: 81-3-6880-3771  
China - Chengdu  
Tel: 86-28-8665-5511  
Fax: 86-28-8665-7889  
Austin, TX  
Tel: 512-257-3370  
Germany - Pforzheim  
Tel: 49-7231-424750  
Korea - Daegu  
Tel: 82-53-744-4301  
Fax: 82-53-744-4302  
Boston  
China - Chongqing  
Tel: 86-23-8980-9588  
Fax: 86-23-8980-9500  
Italy - Milan  
Tel: 39-0331-742611  
Fax: 39-0331-466781  
Westborough, MA  
Tel: 774-760-0087  
Fax: 774-760-0088  
Korea - Seoul  
Tel: 82-2-554-7200  
Fax: 82-2-558-5932 or  
82-2-558-5934  
China - Hangzhou  
Tel: 86-571-8792-8115  
Fax: 86-571-8792-8116  
Italy - Venice  
Tel: 39-049-7625286  
Chicago  
Itasca, IL  
Tel: 630-285-0071  
Fax: 630-285-0075  
Netherlands - Drunen  
Tel: 31-416-690399  
Fax: 31-416-690340  
Malaysia - Kuala Lumpur  
Tel: 60-3-6201-9857  
Fax: 60-3-6201-9859  
China - Hong Kong SAR  
Tel: 852-2943-5100  
Fax: 852-2401-3431  
Cleveland  
Independence, OH  
Tel: 216-447-0464  
Fax: 216-447-0643  
Poland - Warsaw  
Tel: 48-22-3325737  
Malaysia - Penang  
Tel: 60-4-227-8870  
Fax: 60-4-227-4068  
China - Nanjing  
Tel: 86-25-8473-2460  
Fax: 86-25-8473-2470  
Spain - Madrid  
Tel: 34-91-708-08-90  
Fax: 34-91-708-08-91  
Dallas  
Addison, TX  
Tel: 972-818-7423  
Fax: 972-818-2924  
Philippines - Manila  
Tel: 63-2-634-9065  
Fax: 63-2-634-9069  
China - Qingdao  
Tel: 86-532-8502-7355  
Fax: 86-532-8502-7205  
Sweden - Stockholm  
Tel: 46-8-5090-4654  
Singapore  
Tel: 65-6334-8870  
Fax: 65-6334-8850  
Detroit  
Novi, MI  
Tel: 248-848-4000  
China - Shanghai  
Tel: 86-21-5407-5533  
Fax: 86-21-5407-5066  
UK - Wokingham  
Tel: 44-118-921-5800  
Fax: 44-118-921-5820  
Taiwan - Hsin Chu  
Tel: 886-3-5778-366  
Fax: 886-3-5770-955  
Houston, TX  
Tel: 281-894-5983  
China - Shenyang  
Tel: 86-24-2334-2829  
Fax: 86-24-2334-2393  
Indianapolis  
Noblesville, IN  
Tel: 317-773-8323  
Fax: 317-773-5453  
Taiwan - Kaohsiung  
Tel: 886-7-213-7830  
China - Shenzhen  
Tel: 86-755-8864-2200  
Fax: 86-755-8203-1760  
Taiwan - Taipei  
Tel: 886-2-2508-8600  
Fax: 886-2-2508-0102  
Los Angeles  
China - Wuhan  
Tel: 86-27-5980-5300  
Fax: 86-27-5980-5118  
Mission Viejo, CA  
Tel: 949-462-9523  
Fax: 949-462-9608  
Thailand - Bangkok  
Tel: 66-2-694-1351  
Fax: 66-2-694-1350  
China - Xian  
Tel: 86-29-8833-7252  
Fax: 86-29-8833-7256  
New York, NY  
Tel: 631-435-6000  
San Jose, CA  
Tel: 408-735-9110  
China - Xiamen  
Tel: 86-592-2388138  
Fax: 86-592-2388130  
Canada - Toronto  
Tel: 905-673-0699  
Fax: 905-673-6509  
China - Zhuhai  
Tel: 86-756-3210040  
Fax: 86-756-3210049  
03/25/14  
DS20005142C-page 32  
2012-2015 Microchip Technology Inc.  

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