M24256 Datasheet, PDF (1/17 Pages) STMicroelectronics – 256/128 Kbit Serial I²C Bus EEPROM Without Chip Enable Lines

M24256
M24128
256/128 Kbit Serial I²C Bus EEPROM
Without Chip Enable Lines
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 M24xxx
– 2.5V to 5.5V for M24xxx-W
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 (M24256) and 16Kx8 bits
(M24128), and operate down to 2.5 V (for the -W
version of each device).
The M24256B, M24128B and M24256A are also
available, and offer the extra functionality of the
chip enable inputs. Please see the separate data
sheets for details of these products.
The M24256 and M24128 are available in Plastic
Dual-in-Line and Plastic Small Outline packages.
These memory devices are compatible with the
I²C extended memory standard. This is a two wire
Table 1. Signal Names
SDA
Serial Data/Address Input/
Output
SCL
Serial Clock
WC
Write Control
V_CC
V_SS
Supply Voltage
Ground
8
1
PDIP8 (BN)
0.25 mm frame
8
1
SO8 (MN)
150 mil width
8
1
SO8 (MW)
200 mil width
Figure 1. Logic Diagram
VCC
SCL
SDA
M24256
M24128
WC
VSS
AI01882
June 2001
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