AT24C128 Datasheet, PDF (1/15 Pages) ATMEL Corporation – 2-Wire Serial EEPROMs

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
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.
Pin Configurations
Pin Name
A₀ to A₁
SDA
SCL
WP
NC
Function
Address Inputs
Serial Data
Serial Clock Input
Write Protect
No Connect
8-Pin PDIP
A0 1
A1 2
NC 3
GND 4
8 VCC
7 WP
6 SCL
5 SDA
8-Pin SOIC
A0
A1
NC
NC
NC
NC
GND
14-Pin TSSOP
1
14
2
13
3
12
4
11
5
10
6
9
7
8
VCC
WP
NC
NC
NC
SCL
SDA
A0 1
A1 2
NC 3
GND 4
8 VCC
7 WP
6 SCL
5 SDA
8-Pin Leadless Array
VCC
WP
SCL
SDA
81
72
63
54
A0
A1
NC
GND
Bottom View
2-Wire Serial
EEPROMs
128K (16,384 x 8)
256K (32,768 x 8)
AT24C128
AT24C256
Rev. 0670C–08/98
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