AT24C32A_05 Datasheet, PDF (1/17 Pages) ATMEL Corporation – Two-wire Automotive Serial EEPROM

Features
• Standard-Voltage Operation
– 2.7 (V_CC = 2.7V to 5.5V)
• Internally Organized 4096 x 8 (32K), 8192 x 8 (64K)
• Two-wire Serial Interface
• Schmitt Trigger, Filtered Inputs for Noise Suppression
• Bidirectional Data Transfer Protocol
• 400 kHz Clock Rate
• Write Protect Pin for Hardware Data Protection
• 32-byte Page Write Mode (Partial Page Writes Allowed)
• Self-timed Write Cycle (5 ms Max)
• High Reliability
– Endurance: 1 Million Write Cycles
– Data Retention: 100 Years
• Lead-free/Halogen-free Devices Available
• 8-lead JEDEC SOIC and 8-lead TSSOP Packages
Description
The AT24C32A/64A provides 32,768/65,536 bits of serial electrically erasable and
programmable read only memory (EEPROM) organized as 4096/8192 words of 8 bits
each. The device’s cascadable feature allows up to 8 devices to share a common two-
wire bus. The device is optimized for use in many automotive applications where low
power and low voltage operation are essential. The AT24C32A/64A is available in
space saving 8-lead JEDEC SOIC and 8-lead TSSOP packages and is accessed via
a 2-wire serial interface and is available in a 2.7V (2.7V to 5.5V) version.
Two-wire
Automotive
Serial EEPROM
32K (4096 x 8)
64K (8192 x 8)
AT24C32A
AT24C64A
Table 1. Pin Configuration
Pin Name Function
A0 – A2
Address Inputs
SDA
Serial Data
SCL
Serial Clock Input
WP
Write Protect
8-lead SOIC
A0 1
A1 2
A2 3
GND 4
8 VCC
7 WP
6 SCL
5 SDA
8-lead TSSOP
A0 1
A1 2
A2 3
GND 4
8 VCC
7 WP
6 SCL
5 SDA
5120B–SEEPR–11/05
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