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STMicroelectronics Electronic Components Datasheet


M24256-A

256 Kbit Serial I C Bus EEPROM With Two Chip Enable Lines


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M24256-A pdf
M24256-A
256 Kbit Serial I C Bus EEPROM
With Two Chip Enable Lines
PRELIMINARY DATA
s Compatible with I2C Extended Addressing
s Two Wire I2C Serial Interface
Supports 400 kHz Protocol
s Single Supply Voltage:
– 4.5V to 5.5V for M24256-A
– 2.5V to 5.5V for M24256-AW
– 1.8V to 3.6V for M24256-AR
s 2 Chip Enable Inputs: up to four memories can
be connected to the same I2C bus
s Hardware Write Control
s BYTE and PAGE WRITE (up to 64 Bytes)
s RANDOM and SEQUENTIAL READ Modes
s Self-Timed Programming Cycle
s Automatic Address Incrementing
s Enhanced ESD/Latch-Up Behavior
s More than 100,000 Erase/Write Cycles
s More than 40 Year Data Retention
DESCRIPTION
These I2C-compatible electrically erasable pro-
grammable memory (EEPROM) devices are orga-
nized as 32Kx8 bits, and operate down to 2.5 V
(for the M24256-AW), and down to 1.8 V (for the
M24256-AR).
The M24256-A is available in Plastic Dual-in-Line,
Plastic Small Outline and Thin Shrink Small Out-
line packages. The M24256-A is also available in
a chip-scale (SBGA) package.
Table 1. Signal Names
E0, E1
Chip Enable
SDA
Serial Data
SCL
Serial Clock
WC Write Control
VCC
VSS
Supply Voltage
Ground
8
1
PSDIP8 (BN)
0.25 mm frame
8
1
SO8 (MN)
150 mil width
14
1
TSSOP14 (DL)
169 mil width
SBGA
SBGA7 (EA)
140 x 90 mil
8
1
SO8 (MW)
200 mil width
Figure 1. Logic Diagram
VCC
2
E0-E1
SCL
WC
M24256-A
SDA
VSS
AI02271C
April 2000
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1/20



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M24256-A
Figure 2A. DIP Connections
Figure 2C. TSSOP Connections
M24256-A
E0 1
E1 2
8 VCC
7 WC
NC 3
6 SCL
VSS 4
5 SDA
AI02273C
Note: 1. NC = Not Connected
Figure 2B. SO Connections
E0
E1
NC
VSS
M24256-A
18
27
36
45
AI02272C
VCC
WC
SCL
SDA
Note: 1. NC = Not Connected
E0
E1
NC
NC
NC
NC
VSS
M24256-A
1 14
2 13
3 12
4 11
5 10
69
78
AI02388C
VCC
WC
NC
NC
NC
SCL
SDA
Note: 1. NC = Not Connected
Figure 2D. SBGA Connections (top view)
M24256-A
WC S1
VCC
S0
SDA
SCL VSS
AI03760
Table 2. Absolute Maximum Ratings 1
Symbol
Parameter
Value
Unit
TA
T STG
Ambient Operating Temperature
Storage Temperature
–40 to 125
–65 to 150
°C
°C
TLEAD
Lead Temperature during Soldering
PSDIP8: 10 sec
SO8: 40 sec
TSSOP14: t.b.c.
260
215
t.b.c.
°C
VIO Input or Output range
–0.6 to 6.5
V
VCC Supply Voltage
–0.3 to 6.5
V
VESD
Electrostatic Discharge Voltage (Human Body model) 2
Electrostatic Discharge Voltage (Machine model) 3
4000
200
V
V
Note: 1. Except for the rating “Operating Temperature Range”, stresses above those listed in the Table “Absolute Maximum Ratings” may
cause permanent damage to the device. These are stress ratings only, and operation of the device at these or any other conditions
above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating condi-
tions for extended periods may affect device reliability. Refer also to the ST SURE Program and other relevant quality documents.
2. MIL-STD-883C, 3015.7 (100 pF, 1500 )
3. EIAJ IC-121 (Condition C) (200 pF, 0 )
2/20



Part Number M24256-A
Description 256 Kbit Serial I C Bus EEPROM With Two Chip Enable Lines
Maker STMicroelectronics - STMicroelectronics
Total Page 20 Pages
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