KK24LC08 [KODENSHI]
4K/8K 2.5V CMOS Serial EEPROMs; 4K / 8K 2.5V的CMOS串行EEPROM
| 型号： | KK24LC08 |
| 厂家： | 
KODENSHI KOREA CORP. |
| 描述： | 4K/8K 2.5V CMOS Serial EEPROMs |
| 文件： | 总10页 (文件大小：215K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TECHNICAL DATA
KK24LC04/08
4K/8K 2.5V CMOS Serial EEPROMs
DESCRIPTION
KK24LC04/08 is a 4K-or 8K-bit Electrically Erasable PROM. The device is organized as two or four blocks of 256 x 8
bit memory with a two wire serial interface. Low voltage design permits operation down to 2.5 volts with standby and
active currents of only 5µA and 1mA respectively. The KK24LC04/08 also has a page-write capability for up to 16
bytes of data. The KK24LC04B/08B is available in the standard 8-pin DIP.
FEATURES
• Single supply with operation down to 2.5V
• Low power CMOS technology
- 1 mA active current typical
- 10 µA standby current typical at 5.5V
- 5 µA standby current typical at 3.0V
• Organized as two or four blocks of 256 bytes (2x256x8) and
PACKAGE
TA = -40 ... +85 °C
(4x256x8)
• Two wire serial interface bus, I2C compatible
• Schmitt trigger, filtered inputs for noise suppression
• Output slope control to eliminate ground bounce
• 100 kHz (2.5V) and 400 kHz (5V) 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
PINNING
Name
Vss
Function
Ground
SDA
SCL
WP
Serial Address/Data I/O
Serial Clock
Write Protect Input
+2.5V to 5.5V Power Supply
VCC
AO, A1, A2 No Internal Connection
• Factory programming (QTP) available
• ESD protection > 4,000V
• 1,000,000 ERASE/WRITE cycles guaranteed*
• Data retention > 200 years
Pin Connection
A0
Vcc
WP
• 8-pin DIP
• Temperature range -40 to +85 oC
1
2
3
4
8
7
6
5
A1
A2
SCL
SDA
Vss
1
KK24LC04/08
Figure 1. Representative Block Diagram
ELECTRICAL CHARACTERISTICS
Maximum Ratings*
Parameter
Value
VCC
7.0 V
All inputs and outputs w.r.t.Vss
Storage temperature
Ambient temp. with power applied
Soldering temperature of leads (10 seconds)
ESD protection on all pins
-0.3V to Vcc + 1.0V
65oC to +150oC
-40 to +8oC
+300oC
> 4 kV
DC CHARACTERISTICS
Vcc = +2.5V to +5.5V Commercial: Tamb = -40to +85
Parameter
Symbol
Min
Max Units
Mode
WP, SCL and SDA pins:
High level input voltage
Low level input voltage
Hysteresis of Schmitt trigger inputs
Low level output voltage
Input leakage current
VlH
VIL
VHYS
VOL
ILI
ILO
0.7VCC
-
0.3VCC
-
0.40
10
V
V
V
-
0.05VCC
-
Note 1
IOL = 3.0mA, VCC = 2.5V
V
VlN=0.1V to VCC
-10
-10
µA
µA
pF
VOUT=0.1V to VCC
Output leakage current
Pin capacitance (all inputs/outputs)
10
VCC = 5.0V (Note 1)
CIN
COUT
-
10
Tamb =25oC, Fclk =1MHz
VCC = 5.5V SCL = 400kHz
Operating current
Standby current
I
I
CC WRITE
-
-
-
-
3
1
30
100
mA
mA
µA
µA
CCREAD
SDA=SCL=VCC=3.0V,
SDA=SCL=VCC=5.5V
ICCS
2
KK24LC04/08
Figure 2. Bus timing Start/Stop
AC CHARACTERISTICS
STANDARD
MODE
Vcc = 4.5 - 5.5V
FAST MODE
Parameter
Symbol
Units Remarks
Min
Max
100
-
Min
Max
400
-
Clock frequency
Clock high time
Clock low time
SDA and SCL rise time
SDA and SCL fall time
START condition hold time
FCLK
THIGH
TLOW
TR
-
4000
4700
-
-
600
1300
-
kHz
ns
ns
ns Note 2
ns Note 2
-
-
1000
300
300
300
TF
-
-
After this period the
first clock pulse is
generated
THD:STA
4000
-
600
-
ns
Only relevant for
repeated START
condition
START condition setup time
TSU:STA
4700
-
600
-
ns
Data input hold time
THD:DAT
TSU:DAT
TSU:STO
TAA
0
250
4000
-
-
-
-
0
100
600
-
-
-
-
ns
ns
ns
Data input setup time
STOP condition setup time
Output valid from clock
3500
900
ns Note 1
Time the bus must be
free before a new
transmission can start
Bus free time
TBUF
TOF
TSP
4700
-
1300
-
ns
Output fall time from VIH min
to VIL max
Input filter spike suppres-sion
(SDA & SCL pins)
Note2,
ns
-
-
-
250
50
20+0.1CB
250
50
CB≤100pF
Note 3
-
-
ns
Write cycle time
Byte or Page
TWR
10
10
ms
mode
Note 1: 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.
Note 2: Not 100% tested. CB = total capacitance of one bus line in pF.
Note 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 for standard
operation.
3
KK24LC04/08
Figure 3. Bus timing Data
FUNCTIONAL DESCRIPTION
The KK24LC04/08 supports a bidirectional two 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 generates the START and STOP conditions, while the KK24LC04/08 works as slave.
Both, master and slave can operate as transmitter or receiver but the master device determines
which mode is activated.
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.
Accordingly, the following bus conditions have been defined (see Figure 4).
Bus not Busy (A)
Both data and clock lines remain HIGH.
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 condition.
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.
Data Valid (D)
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 sixteen will be stored when
doing a write operation. When an overwrite does occur it will replace data in a first in first out
fashion.
4
KK24LC04/08
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.
Note: The KK24LC04/08 does not generate any acknowledge bits if an internal programming cycle is in
progress
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. 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 must leave the data line HIGH to enable the master to
generate the STOP condition.
Figure 4. Data Transfer Sequence on the serial bus
BUS CHARACTERISTICS
Device Addressing and Operation
A control byte is the first byte received following the start condition from the master device. The
control byte consists of a four bit control code, for the KK24LC04/08 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,
BO). B2 is a don't care for both the KK24LC04 and KK24LC08; B1 is a don't care for the KK24LC04.
They are used by the master device to select which of the two or four 256 word blocks of memory
are to be accessed. These bits are in effect the most significant bits of the word address.
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 KK24LC04/08 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 KK24LC04/ 08 will select a read or write operation.
Operation
Read
Write
Control Code
1010
Block Select
Block Address
Block Address
R/W
1
0
1010
5
KK24LC04/08
Figure 5. Control Byte Allocation
WRITE OPERATION
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 KK24LC04/08. After receiving
another acknowledge signal from the KK24LC04/08 the master device will transmit the data word to
be written into the addressed memory location. The KK24LC04/08 acknowledges again and the
master generates a stop condition. This initiates the internal write cycle, and during this time the
KK24LC04/08 will not generate acknowledge signals (see Figure 6).
Page Write
The write control byte, word address and the first data byte are transmitted to the KK24LC04/08 in
the same way as in a byte write. But instead of generating a stop condition the master transmits up
to sixteen data bytes to the KK24LC04/08 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 sixteen 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 internal write cycle will begin (see Figure 8).
Figure 6. Byte Write
6
KK24LC04/08
ACKNOWLEDGE POLLING
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 command has been
issued from the master, the device initiates the
internally timed write cycle, ACK polling can be
initiated immediately. This involves the master
sending 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 7 for flow diagram.
Figure 7. Acknowledge Polling Flow
WRITE PROTECTION
The KK24LC04/08 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.
READ OPERATION
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.
Current Address Read
The KK24LC04/08 contains an address counter that maintains the address of the last word accessed,
internally 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 KK24LC04/08 issues an acknowledge
and transmits the eight bit data word. The master will not acknowledge the transfer but does
generate a stop condition and the KK24LC04/08 discontinues transmission (see Figure 9).
Random Read
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 KK24LC04/08 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 KK24LC04/ 08 will then issue an acknowledge and transmits the
eight bit data word. The master will not acknowledge the transfer but does generate a stop condition
and the KK24LC04/08 discontinues transmission (see Figure 10).
7
KK24LC04/08
Figure 8. Page Write
Figure 9. Current Address Read
Figure 10. Random Read
Sequential Read
Sequential reads are initiated in the same way as a random read except that after the KK24LC04/08
transmits the first data byte, the master issues an acknowledge as opposed to a stop condition in a
random read. This directs the KK24LC04/08 to transmit the next sequentially addressed 8 bit word
(see Figure 11).
To provide sequential reads the KK24LC04/08 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.
Noise Protection
The KK24LC04/08 employs a Vcc threshold detector circuit 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.
8
KK24LC04/08
Figure 11. Sequential read
PIN DESCRIPTIONS
SPA Serial Address/Data Input/Output
This is a bidirectional 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 puliup resistor to Vcc (typical 10KΩ for 100
kHz, 1 KΩ for 400 kHz).
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 conditions.
SCL Serial Clock
This input is used to synchronize the data transfer from and to the device.
WP
This pin must be connected to either Vss or Vcc.
If tied to Vss, normal memory operation is enabled (read/write the entire memory).
If tied to Vcc, WRITE operations are inhibited. The entire memory will be write-protected. Read
operations are not affected.
This feature allows the user to use the KK24LC04/08 as a serial ROM when WP is enabled (tied to
Vcc).
A0,A1,A2
These pins are not used by the KK24LC04/08. They may be left floating or tied to either Vss or Vcc.
9
KK24LC04/08
N SUFFIX PLASTIC DIP
(MS – 001BA)
A
Dimension, mm
5
4
8
1
Symbol
MIN
8.51
6.1
MAX
10.16
7.11
B
A
B
C
D
F
5.33
F
L
0.36
1.14
0.56
C
1.78
SEATING
PLANE
-T-
K
2.54
7.62
G
H
J
N
M
J
G
H
D
0°
10°
3.81
8.26
0.36
0.25 (0.010) M
T
2.92
7.62
0.2
K
L
M
N
NOTES:
1. Dimensions “A”, “B” do not include mold flash or protrusions.
Maximum mold flash or protrusions 0.25 mm (0.010) per side.
0.38
D SUFFIX SOIC
(MS - 012AA)
Dimension, mm
A
8
5
Symbol
MIN
4.8
MAX
5
A
B
C
D
F
B
H
P
3.8
4
1.35
0.33
0.4
1.75
0.51
1.27
1
4
G
R x 45
C
-T-
SEATING
PLANE
1.27
5.72
G
H
J
K
M
D
J
F
M
0.25 (0.010) M T C
0°
8°
0.1
0.25
0.25
6.2
K
M
P
NOTES:
0.19
5.8
1. Dimensions A and B do not include mold flash or protrusion.
2. Maximum mold flash or protrusion 0.15 mm (0.006) per side
0.25
0.5
R
for A; for B 0.25 mm (0.010) per side.
‑
10
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