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Atmel Electronic Components Datasheet

AT24C64A Datasheet

Two-wire Serial EEPROM

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Features
Standard-Voltage Operation
– 2.7 (VCC = 2.7V to 5.5V)
Internally Organized 4096 x 8 (32K), 8192 x 8 (64K)
Automotive Temperature Range –40C to +125C
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.
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
Two-wire
Automotive
Serial EEPROM
32K (4096 x 8)
64K (8192 x 8)
AT24C32A(1)
AT24C64A
1. AT24C32A not recommended for
new design; replaced by
AT24C32D Automotive.
2. AT24C64A not recommended for
new design; replaced by
AT24C64D Automotive.
5120D–SEEPR–6/08


Atmel Electronic Components Datasheet

AT24C64A Datasheet

Two-wire Serial EEPROM

No Preview Available !

Absolute Maximum Ratings*
Operating Temperature ................................ –55C to +125C
Storage Temperature.................................... –65C to +150C
Voltage on Any Pin
with Respect to Ground ....................................–1.0V to +7.0V
Maximum Operating Voltage .......................................... 6.25V
DC Output Current........................................................ 5.0 mA
Figure 1. Block Diagram
*NOTICE:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect
device reliability.
2 AT24C32A/64A
5120D–SEEPR–6/08


Part Number AT24C64A
Description Two-wire Serial EEPROM
Maker ATMEL
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AT24C64A Datasheet PDF






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