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24C256

Description
32K X 8 I2C/2-WIRE SERIAL EEPROM, PDSO8
Categorystorage   
File Size230KB,15 Pages
ManufacturerAtmel (Microchip)
Download Datasheet Parametric View All

24C256 Overview

32K X 8 I2C/2-WIRE SERIAL EEPROM, PDSO8

24C256 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals8
Maximum operating temperature70 Cel
Minimum operating temperature0.0 Cel
Maximum supply/operating voltage5.5 V
Minimum supply/operating voltage2.7 V
Rated supply voltage3.3 V
maximum clock frequency0.4000 MHz
Processing package description0.150 INCH, PLASTIC, SOIC-8
stateDISCONTINUED
packaging shapeRECTANGULAR
Package SizeSMALL OUTLINE
surface mountYes
Terminal formGULL WING
Terminal spacing1.27 mm
terminal coatingTIN LEAD
Terminal locationDUAL
Packaging MaterialsPLASTIC/EPOXY
Temperature levelCOMMERCIAL
memory width8
organize32K X 8
storage density262144 deg
operating modeSYNCHRONOUS
Number of digits32768 words
Number of digits32K
Memory IC typeI2C/2-WIRE SERIAL EEPROM
serial parallelSERIAL
Maximum TWC of write cycle10 ms
Features
Low Voltage and Standard Voltage Operation
– 5.0 (V
CC
= 4.5V to 5.5V)
– 2.7 (V
CC
= 2.7V to 5.5V)
– 1.8 (V
CC
= 1.8V to 3.6V)
Internally Organized 16,384 x 8 and 32,768 x 8
2-Wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
1 MHz (5V), 400 kHz (2.7V) and 100 kHz (1.8V) Compatibility
Write Protect Pin for Hardware and Software Data Protection
64-Byte Page Write Mode (Partial Page Writes Allowed)
Self-Timed Write Cycle (5 ms typical)
High Reliability
– Endurance: 100,000 Write Cycles
– Data Retention: 40 Years
– ESD Protection: > 4000V
Automotive Grade and Extended Temperature Devices Available
8-Pin JEDEC PDIP, 8-Pin JEDEC and EIAJ SOIC, 14-Pin TSSOP, and
8-Pin Leadless Array Packages
2-Wire Serial
EEPROMs
128K (16,384 x 8)
256K (32,768 x 8)
Description
The AT24C128/256 provides 131,072/262,144 bits of serial electrically erasable and
programmable read only memory (EEPROM) organized as 16,384/32,768 words of 8
bits each. The device’s cascadable feature allows up to 4 devices to share a common
2-wire bus. The device is optimized for use in many industrial and commercial applica-
tions where low power and low voltage operation are essential. The devices are avail-
able in space-saving 8-pin JEDEC PDIP, 8-pin EIAJ, 8-pin JEDEC SOIC, 14-pin
TSSOP, and 8-pin LAP packages. In addition, the entire family is available in 5.0V
(4.5V to 5.5V), 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 3.6V) versions.
AT24C128
AT24C256
Pin Configurations
Pin Name
A
0
to A
1
SDA
SCL
WP
NC
Function
Address Inputs
Serial Data
Serial Clock Input
Write Protect
No Connect
A0
A1
NC
GND
A0
A1
NC
GND
8-Pin PDIP
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
8-Pin SOIC
1
2
3
4
8
7
6
5
VCC
WP
SCL
SDA
14-Pin TSSOP
A0
A1
NC
NC
NC
NC
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
VCC
WP
NC
NC
NC
SCL
SDA
8-Pin Leadless Array
VCC
WP
SCL
SDA
8
7
6
5
1
2
3
4
A0
A1
NC
GND
Rev. 0670C–08/98
Bottom View
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