24C08B-E/SN [MICROCHIP]

1K X 8 I2C/2-WIRE SERIAL EEPROM, PDSO8, 0.150 INCH, PLASTIC, SOIC-8;
24C08B-E/SN
型号: 24C08B-E/SN
厂家: MICROCHIP    MICROCHIP
描述:

1K X 8 I2C/2-WIRE SERIAL EEPROM, PDSO8, 0.150 INCH, PLASTIC, SOIC-8

可编程只读存储器 电动程控只读存储器 电可擦编程只读存储器 时钟 光电二极管 内存集成电路
文件: 总13页 (文件大小:118K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
24C08B/16B  
2 ™  
8K/16K 5.0V I C Serial EEPROMs  
FEATURES  
PACKAGE TYPES  
PDIP  
• Single supply with operation from 4.5-5.5V  
• Low power CMOS technology  
A0  
A1  
1
2
8
7
VCC  
WP  
- 1 mA active current typical  
- 10 µA standby current typical at 5.5V  
• Organized as 4 or 8 blocks of 256 bytes  
(4 x 256 x 8) or (8 x 256 x 8)  
A2  
3
4
6
5
SCL  
SDA  
2
• 2-wire serial interface bus, I C compatible  
VSS  
• Schmitt trigger, filtered inputs for noise suppres-  
sion  
• Output slope control to eliminate ground bounce  
• 100 kHz compatibility  
• Self-timed write cycle (including auto-erase)  
• Page-write buffer for up to 16 bytes  
• 2 ms typical write cycle time for page-write  
• Hardware write protect for entire memory  
• Can be operated as a serial ROM  
• ESD protection > 4,000V  
• 1,000,000 ERASE/WRITE cycles guaranteed  
• Data retention > 200 years  
• 8-pin DIP, 8-lead or 14-lead SOIC packages  
• Available for extended temperature range  
8-lead  
SOIC  
1
2
8
A0  
A1  
VCC  
7
6
5
WP  
3
4
A2  
SCL  
SDA  
VSS  
14-lead  
SOIC  
- Commercial (C):  
- Industrial (I):  
- Automotive (E):  
0°C to +70°C  
-40°C to +85°C  
-40˚C to +125˚C  
14  
13  
12  
11  
1
2
3
4
5
6
7
NC  
NC  
A0  
VCC  
WP  
NC  
A1  
DESCRIPTION  
NC  
The Microchip Technology Inc. 24C08B/16B is an 8K or  
16K bit Electrically Erasable PROM intended for use in  
extended/automotive temperature ranges. The device  
is organized as four or eight blocks of 256 x 8-bit mem-  
ory with a 2-wire serial interface.The 24C08B/16B also  
has a page-write capability for up to 16 bytes of data.  
The 24C08B/16B is available in the standard 8-pin DIP  
and both 8-lead and 14-lead surface mount SOIC pack-  
ages.  
10  
9
SCL  
SDA  
NC  
A2  
VSS  
NC  
8
BLOCK DIAGRAM  
WP  
HV GENERATOR  
I/O  
CONTROL  
LOGIC  
MEMORY  
CONTROL  
LOGIC  
EEPROM  
ARRAY  
XDEC  
PAGE LATCHES  
SDA  
SCL  
YDEC  
VCC  
VSS  
SENSE AMP  
R/W CONTROL  
I2C is a trademark of Philips Corporation.  
1999 Microchip Technology Inc.  
DS21081F-page 1  
24C08B/16B  
TABLE 1-1:  
Name  
PIN FUNCTION TABLE  
Function  
1.0  
ELECTRICAL CHARACTERISTICS  
1.1  
Maximum Ratings*  
VCC...................................................................................7.0V  
All inputs and outputs w.r.t. VSS ................-0.6V to VCC +1.0V  
Storage temperature ..................................... -65˚C to +150˚C  
Ambient temp. with power applied................. -65˚C to +125˚C  
Soldering temperature of leads (10 seconds) ............. +300˚C  
ESD protection on all pins..................................................≥ 4 kV  
VSS  
SDA  
Ground  
Serial Address/Data I/O  
Serial Clock  
SCL  
WP  
Write Protect Input  
+4.5V to 5.5V Power Supply  
No Internal Connection  
*Notice: Stresses above those listed under “Maximum ratings”  
may cause permanent damage to the device. This is a stress rat-  
ing 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 extended periods may affect device reliability.  
VCC  
A0, A1, A2  
TABLE 1-2:  
DC CHARACTERISTICS  
VCC = +4.5V to +5.5V  
Commercial (C): Tamb = 0°C to +70°C  
Industrial (I):  
Automotive (E):  
Tamb = -40°C to +85°C  
Tamb = -40˚C to +125˚C  
Parameter  
Symbol  
Min  
Max  
Units  
Conditions  
WP, SCL and SDA pins:  
High level input voltage  
VIH  
VIL  
.7 Vcc  
.3 VCC  
V
V
V
Low Level input voltage  
Hysteresis of Schmitt trigger  
inputs  
VHYS  
.05 Vcc  
(Note)  
Low level output voltage  
Input leakage current  
VOL  
ILI  
-10  
-10  
.40  
10  
10  
10  
V
IOL = 3.0 mA, VCC=4.5V  
µA  
µA  
pF  
VIN =.1V to VCC  
Output leakage current  
ILO  
VOUT = .1V to VCC  
Pin capacitance  
CIN, COUT  
VCC = 5.0V (Note 1)  
(all inputs/outputs)  
Tamb = 25˚C, FCLK=1 MHz  
Operating current  
ICC write  
ICC read  
3
1
mA  
mA  
VCC = 5.5V, SCL = 400 kHz  
Standby current  
ICCS  
100  
µA  
VCC = 5.5V, SDA = SCL = VCC  
WP = VSS  
Note:  
This parameter is periodically sampled and not 100% tested.  
FIGURE 1-1: BUS TIMING START/STOP  
VHYS  
SCL  
THD:STA  
TSU:STA  
TSU:STO  
SDA  
START  
STOP  
DS21081F-page 2  
1999 Microchip Technology Inc.  
24C08B/16B  
TABLE 1-3:  
AC CHARACTERISTICS  
Parameter  
Symbol  
Min  
Max  
Units  
Remarks  
Clock frequency  
FCLK  
THIGH  
TLOW  
TR  
4000  
4700  
100  
kHz  
ns  
Clock high time  
Clock low time  
ns  
SDA and SCL rise time  
SDA and SCL fall time  
START condition hold time  
1000  
300  
ns  
(Note1)  
(Note 1)  
TF  
ns  
THD:STA  
4000  
ns  
After this period the first clock  
pulse is generated  
START condition setup  
time  
TSU:STA  
4700  
ns  
Only relevant for repeated  
START condition  
Data input hold time  
Data input setup time  
STOP condition setup time  
Output valid from clock  
Bus free time  
THD:DAT  
TSU:DAT  
TSU:STO  
TAA  
0
ns  
ns  
ns  
ns  
ns  
250  
4000  
3500  
(Note 2)  
TBUF  
4700  
Time the bus must be free before  
a new transmission can start  
Output fall time from VIH  
min to VIL max  
TOF  
TSP  
250  
50  
ns  
ns  
(Note 1), CB 100 pF  
Input filter spike suppres-  
sion (SDA and SCL pins)  
(Note 3)  
Write cycle time  
Endurance  
TWR  
10  
ms  
Byte or Page mode  
1M  
cycles  
25°C, VCC = 5.0V, Block Mode  
(Note 4)  
Note 1: Not 100% tested. CB = total capacitance of one bus line in pF.  
2: As a transmitter, the device must provide an internal minimum delay time to bridge the undefined region  
(minimum 300 ns) of the falling edge of SCL to avoid unintended generation of START or STOP conditions.  
3: The combined TSP and VHYS specifications are due to new Schmitt trigger inputs which provide improved  
noise and spike suppression. This eliminates the need for a TI specification.  
4: This parameter is not tested but guaranteed by characterization. For endurance estimates in a specific appli-  
cation, please consult the Total Endurance Model which can be obtained on our website.  
FIGURE 1-2: BUS TIMING DATA  
TR  
TF  
THIGH  
TLOW  
SCL  
TSU:STA  
THD:DAT  
TSU:DAT  
TSU:STO  
THD:STA  
SDA  
IN  
TSP  
TBUF  
TAA  
TAA  
THD:STA  
SDA  
OUT  
1999 Microchip Technology Inc.  
DS21081F-page 3  
 
24C08B/16B  
3.4  
Data Valid (D)  
2.0  
FUNCTIONAL DESCRIPTION  
The 24C08B/16B supports a Bi-directional 2-wire bus  
and data transmission protocol. A device that sends  
data onto the bus is defined as transmitter, and a  
device receiving data as receiver. The bus has to be  
controlled by a master device which generates the  
serial clock (SCL), controls the bus access, and gener-  
ates the START and STOP conditions, while the  
24C08B/16B works as slave. Both, master and slave  
can operate as transmitter or receiver but the master  
device determines which mode is activated.  
The state of the data line represents valid data when,  
after a START condition, the data line is stable for the  
duration of the HIGH period of the clock signal.  
The data on the line must be changed during the LOW  
period of the clock signal. There is one clock pulse per  
bit of data.  
Each data transfer is initiated with a START condition  
and terminated with a STOP condition. The number of  
the data bytes transferred between the START and  
STOP conditions is determined by the master device  
and is theoretically unlimited, although only the last 16  
will be stored when doing a write operation. When an  
overwrite does occur it will replace data in a first in first  
out fashion.  
3.0  
BUS CHARACTERISTICS  
The following bus protocol has been defined:  
• Data transfer may be initiated only when the bus  
is not busy.  
• During data transfer, the data line must remain  
stable whenever the clock line is HIGH. Changes  
in the data line while the clock line is HIGH will be  
interpreted as a START or STOP condition.  
3.5  
Acknowledge  
Each receiving device, when addressed, is obliged to  
generate an acknowledge after the reception of each  
byte. The master device must generate an extra clock  
pulse which is associated with this acknowledge bit.  
Accordingly, the following bus conditions have been  
defined (Figure 3-1).  
Note: The 24C08B/16B does not generate any  
acknowledge bits if an internal program-  
ming cycle is in progress.  
3.1  
Bus not Busy (A)  
Both data and clock lines remain HIGH.  
The device that acknowledges, has to pull down the  
SDA line during the acknowledge clock pulse in such a  
way that the SDA line is stable LOW during the HIGH  
period of the acknowledge related clock pulse. Of  
course, setup and hold times must be taken into  
account. During reads, a master must signal an end of  
data to the slave by NOT generating an acknowledge  
bit on the last byte that has been clocked out of the  
slave. In this case, the slave (24C08B/16B) will leave  
the data line HIGH to enable the master to generate the  
STOP condition.  
3.2  
Start Data Transfer (B)  
A HIGH to LOW transition of the SDA line while the  
clock (SCL) is HIGH determines a START condition.  
All commands must be preceded by a START condi-  
tion.  
3.3  
Stop Data Transfer (C)  
A LOW to HIGH transition of the SDA line while the  
clock (SCL) is HIGH determines a STOP condition. All  
operations must be ended with a STOP condition.  
FIGURE 3-1: DATA TRANSFER SEQUENCE ON THE SERIAL BUS  
(A)  
(B)  
(D)  
(D)  
(C)  
(A)  
SCL  
SDA  
START  
CONDITION  
STOP  
CONDITION  
ADDRESS OR  
ACKNOWLEDGE  
VALID  
DATA  
ALLOWED  
TO CHANGE  
DS21081F-page 4  
1999 Microchip Technology Inc.  
 
24C08B/16B  
3.6  
Device Addressing  
4.0  
WRITE OPERATION  
A control byte is the first byte received following the  
start condition from the master device.The control byte  
consists of a 4-bit control code, for the 24C08B/16B  
this is set as 1010 binary for read and write operations.  
The next three bits of the control byte are the block  
select bits (B2, B1, B0). They are used by the master  
device to select which of the eight 256 word blocks of  
memory are to be accessed.These bits are in effect the  
three most significant bits of the word address.  
4.1  
Byte Write  
Following the start condition from the master, the  
device code (4 bits), the block address (3 bits), and the  
R/W bit which is a logic low is placed onto the bus by  
the master transmitter. This indicates to the addressed  
slave receiver that a byte with a word address will follow  
after it has generated an acknowledge bit during the  
ninth clock cycle.Therefore the next byte transmitted by  
the master is the word address and will be written into  
the address pointer of the 24C08B/16B. After receiving  
another acknowledge signal from the 24C08B/16B the  
master device will transmit the data word to be written  
into the addressed memory location. The 24C08B/16B  
acknowledges again and the master generates a stop  
condition.This initiates the internal write cycle, and dur-  
ing this time the 24C08B/16B will not generate  
acknowledge signals (Figure 4-1).  
The last bit of the control byte defines the operation to  
be performed. When set to one a read operation is  
selected, when set to zero a write operation is selected.  
Following the start condition, the 24C08B/16B monitors  
the SDA bus checking the device type identifier being  
transmitted, upon a 1010 code the slave device outputs  
an acknowledge signal on the SDA line. Depending on  
the state of the R/W bit, the 24C08B/16B will select a  
read or write operation.  
4.2  
Page Write  
Control  
Code  
Operation  
Block Select  
R/W  
The write control byte, word address and the first data  
byte are transmitted to the 24C08B/16B in the same  
way as in a byte write. But instead of generating a stop  
condition the master transmits up to 16 data bytes to  
the 24C08B/16B which are temporarily stored in the  
on-chip page buffer and will be written into the memory  
after the master has transmitted a stop condition. After  
the receipt of each word, the four lower order address  
pointer bits are internally incremented by one. The  
higher order seven bits of the word address remains  
constant. If the master should transmit more than 16  
words prior to generating the stop condition, the  
address counter will roll over and the previously  
received data will be overwritten. As with the byte write  
operation, once the stop condition is received an inter-  
nal write cycle will begin (Figure 4-2).  
Read  
Write  
1010  
1010  
Block Address  
Block Address  
1
0
FIGURE 3-2: CONTROL BYTE  
ALLOCATION  
START  
READ/WRITE  
SLAVE ADDRESS  
R/W  
A
1
0
1
0
B2  
B1  
B0  
Note: Page write operations are limited to writing  
bytes within a single physical page, regard-  
less of the number of bytes actually being  
written. Physical page boundaries start at  
addresses that are integer multiples of the  
page buffer size (or Ôpage sizeÕ) and end at  
addresses that are integer multiples of  
[page size - 1]. If a page write command  
attempts to write across a physical page  
boundary, the result is that the data wraps  
around to the beginning of the current page  
(overwriting data previously stored there),  
instead of being written to the next page as  
might be expected. It is therefore neces-  
sary for the application software to prevent  
page write operations that would attempt to  
cross a page boundary.  
1999 Microchip Technology Inc.  
DS21081F-page 5  
24C08B/16B  
FIGURE 4-1: BYTE WRITE  
S
T
A
R
T
S
T
O
P
BUS ACTIVITY  
MASTER  
CONTROL  
BYTE  
WORD  
ADDRESS  
DATA  
SDA LINE  
S
P
A
C
K
A
C
K
A
C
K
BUS ACTIVITY  
FIGURE 4-2: PAGE WRITE  
S
S
T
O
P
T
A
R
T
BUS ACTIVITY  
MASTER  
CONTROL  
BYTE  
WORD  
ADDRESS (n)  
DATA n  
DATA n + 1  
DATA n + 15  
SDA LINE  
S
P
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
BUS ACTIVITY  
DS21081F-page 6  
1999 Microchip Technology Inc.  
24C08B/16B  
5.0  
ACKNOWLEDGE POLLING  
7.0  
READ OPERATION  
Since the device will not acknowledge during a write  
cycle, this can be used to determine when the cycle is  
complete (this feature can be used to maximize bus  
throughput). Once the stop condition for a write com-  
mand has been issued from the master, the device ini-  
tiates the internally timed write cycle. ACK polling can  
be initiated immediately.This involves the master send-  
ing a start condition followed by the control byte for a  
write command (R/W = 0). If the device is still busy with  
the write cycle, then no ACK will be returned. If the  
cycle is complete, then the device will return the ACK  
and the master can then proceed with the next read or  
write command. See Figure 5-1 for flow diagram.  
Read operations are initiated in the same way as write  
operations with the exception that the R/W bit of the  
slave address is set to one. There are three basic types  
of read operations: current address read, random  
read, and sequential read.  
7.1  
Current Address Read  
The 24C08B/16B contains an address counter that  
maintains the address of the last word accessed, inter-  
nally incremented by one. Therefore, if the previous  
access (either a read or write operation) was to  
address n, the next current address read operation  
would access data from address n + 1. Upon receipt of  
the slave address with R/W bit set to one, the  
24C08B/16B issues an acknowledge and transmits the  
8-bit data word. The master will not acknowledge the  
transfer but does generate a stop condition and the  
24C08B/16B discontinues transmission (Figure 7-1).  
FIGURE 5-1: ACKNOWLEDGE POLLING  
FLOW  
Send  
Write Command  
7.2  
Random Read  
Send Stop  
Condition to  
Random read operations allow the master to access  
any memory location in a random manner. To perform  
this type of read operation, first the word address must  
be set.This is done by sending the word address to the  
24C08B/16B as part of a write operation. After the word  
address is sent, the master generates a start condition  
following the acknowledge. This terminates the write  
operation, but not before the internal address pointer is  
set. Then the master issues the control byte again but  
with the R/W bit set to a one. The 24C08B/16B will then  
issue an acknowledge and transmits the 8-bit data  
word. The master will not acknowledge the transfer but  
does generate a stop condition and the 24C08B/16B  
discontinues transmission (Figure 7-2).  
Initiate Write Cycle  
Send Start  
Send Control Byte  
with R/W = 0  
Did Device  
NO  
Acknowledge  
7.3  
Sequential Read  
(ACK = 0)?  
Sequential reads are initiated in the same way as a ran-  
dom read except that after the 24C08B/16B transmits  
the first data byte, the master issues an acknowledge  
as opposed to a stop condition in a random read. This  
directs the 24C08B/16B to transmit the next sequen-  
tially addressed 8 bit word (Figure 7-3).  
YES  
Next  
Operation  
To provide sequential reads the 24C08B/16B contains  
an internal address pointer which is incremented by  
one at the completion of each operation. This address  
pointer allows the entire memory contents to be serially  
read during one operation.  
6.0  
WRITE PROTECTION  
The 24C08B/16B can be used as a serial ROM when  
the WP pin is connected to VCC. Programming will be  
inhibited and the entire memory will be write-protected.  
7.4  
Noise Protection  
The 24C08B/16B employs aVCC threshold detector cir-  
cuit which disables the internal erase/write logic if the  
VCC is below 1.5 volts at nominal conditions.  
The SCL and SDA inputs have Schmitt trigger and filter  
circuits which suppress noise spikes to assure proper  
device operation even on a noisy bus.  
1999 Microchip Technology Inc.  
DS21081F-page 7  
 
24C08B/16B  
FIGURE 7-1: CURRENT ADDRESS READ  
S
T
A
R
T
S
T
O
P
BUS ACTIVITY  
MASTER  
CONTROL  
BYTE  
DATA n  
SDA LINE  
S
P
A
C
K
N
O
BUS ACTIVITY  
A
C
K
FIGURE 7-2: RANDOM READ  
S
T
A
R
T
S
T
A
R
T
S
T
O
P
BUS ACTIVITY  
MASTER  
CONTROL  
BYTE  
WORD  
ADDRESS (n)  
CONTROL  
BYTE  
DATA (n)  
S
P
S
SDA LINE  
A
C
K
A
C
K
A
C
K
N
O
BUS ACTIVITY  
A
C
K
FIGURE 7-3: SEQUENTIAL READ  
S
T
O
P
BUS ACTIVITY  
MASTER  
CONTROL  
BYTE  
DATA n  
DATA n + 1  
DATA n + 2  
DATA n + X  
SDA LINE  
P
A
C
K
A
C
K
A
C
K
A
C
K
N
O
BUS ACTIVITY  
A
C
K
8.3  
WP  
8.0  
PIN DESCRIPTIONS  
This pin must be connected to either VSS or VCC.  
8.1  
SDA Serial Address/Data Input/Output  
If tied to VSS, normal memory operation is enabled  
(read/write the entire memory 000-7FF).  
This is a Bi-directional pin used to transfer addresses  
and data into and data out of the device. It is an open  
drain terminal, therefore the SDA bus requires a pull-up  
resistor to VCC (typical 10 k).  
If tied to VCC, WRITE operations are inhibited. The  
entire memory will be write-protected. Read opera-  
tions are not affected.  
For normal data transfer SDA is allowed to change only  
during SCL low. Changes during SCL high are  
reserved for indicating the START and STOP condi-  
tions.  
This feature allows the user to use the 24C08B/16B as  
a serial ROM when WP is enabled (tied to VCC).  
8.4  
A0, A1, A2  
8.2  
SCL Serial Clock  
These pins are not used by the 24C08B/16B. They  
may be left floating or tied to either VSS or VCC.  
This input is used to synchronize the data transfer from  
and to the device.  
DS21081F-page 8  
1999 Microchip Technology Inc.  
24C08B/16B  
NOTES:  
1999 Microchip Technology Inc.  
DS21081F-page 9  
24C08B/16B  
NOTES:  
DS21081F-page 10  
1999 Microchip Technology Inc.  
24C08B/16B  
24C08B/16B Product Identification System  
To order or to obtain information, e.g., on pricing or delivery, please use the listed part numbers, and refer to the factory or the listed  
sales offices.  
24C08B/16B  
E
/P  
P = Plastic DIP (300 mil Body), 8-lead  
SL = Plastic SOIC (150 mil Body), 14-lead  
SN = Plastic SOIC (150 mil Body), 8-lead  
Package:  
Temperature  
Range:  
Blank = 0°C to +70°C  
I = -40°C to +85°C  
E = -40°C to +125°C  
2
24C08B  
24C08BT  
24C16B  
8K I C Serial EEPROM  
2
8K I C Serial EEPROM (Tape and Reel)  
Device:  
2
16K I C Serial EEPROM  
16K I C Serial EEPROM (Tape and Reel)  
2
24C16BT  
Sales and Support  
Data Sheets  
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom-  
mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:  
1. Your local Microchip sales office  
2. The Microchip Corporate Literature Center U.S. FAX: (602) 786-7277  
3. The Microchip Worldwide Site (www.microchip.com)  
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.  
New Customer Notification System  
Register on our web site (www.microchip.com/cn) to receive the most current information on our products.  
1999 Microchip Technology Inc.  
DS21081F-page 11  
®
Note the following details of the code protection feature on PICmicro MCUs.  
The PICmicro family meets the specifications contained in the Microchip Data Sheet.  
Microchip believes that its family of PICmicro microcontrollers is one of the most secure products 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 knowl-  
edge, require using the PICmicro microcontroller in a manner outside the operating specifications contained in the data sheet.  
The person doing so may be 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 product.  
If you have any further questions about this matter, please contact the local sales office nearest to you.  
Information contained in this publication regarding device  
applications and the like is intended through suggestion only  
and may be superseded by updates. It is your responsibility to  
ensure that your application meets with your specifications.  
No representation or warranty is given and no liability is  
assumed by Microchip Technology Incorporated with respect  
to the accuracy or use of such information, or infringement of  
patents or other intellectual property rights arising from such  
use or otherwise. Use of Microchip’s products as critical com-  
ponents in life support systems is not authorized except with  
express written approval by Microchip. No licenses are con-  
veyed, implicitly or otherwise, under any intellectual property  
rights.  
Trademarks  
The Microchip name and logo, the Microchip logo, FilterLab,  
KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER,  
PICSTART, PRO MATE, SEEVAL and The Embedded Control  
Solutions Company are registered trademarks of Microchip Tech-  
nology Incorporated in the U.S.A. and other countries.  
dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,  
In-Circuit Serial Programming, ICSP, ICEPIC, microPort,  
Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM,  
MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode  
and Total Endurance are trademarks of Microchip Technology  
Incorporated in the U.S.A.  
Serialized Quick Turn Programming (SQTP) is a service mark  
of Microchip Technology Incorporated in the U.S.A.  
All other trademarks mentioned herein are property of their  
respective companies.  
© 2002, Microchip Technology Incorporated, Printed in the  
U.S.A., All Rights Reserved.  
Printed on recycled paper.  
Microchip received QS-9000 quality system  
certification for its worldwide headquarters,  
design and wafer fabrication facilities in  
Chandler and Tempe, Arizona in July 1999. The  
Company’s quality system processes and  
procedures are QS-9000 compliant for its  
PICmicro® 8-bit MCUs, KEELOQ® code hopping  
devices, Serial EEPROMs and microperipheral  
products. In addition, Microchips quality  
system for the design and manufacture of  
development systems is ISO 9001 certified.  
2002 Microchip Technology Inc.  
M
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01/18/02  
2002 Microchip Technology Inc.  

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