Features
Low-voltage and Standard-voltage Operation
2.7 (V = 2.7 to 5.5V)
CC
= 1.8 to 5.5V)
1.8 (V
CC
Low-power Devices (I = 6 A at 5.5V) Available
SB
Internally Organized 8192 x 8
2-Wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bi-directional Data Transfer Protocol
400 kHz Clock Rate
Write Protect Pin for Hardware Data Protection
2-Wire
32-Byte Page Write Mode (Partial Page Writes Allowed)
Self-Timed Write Cycle (5 ms max)
Serial EEPROM
High Reliability
Endurance: 1 Million Write Cycles
64K (8192 x 8)
Data Retention: 100 Years
Lead-free/Halogen-free Devices Available
8-lead PDIP, 8-lead JEDEC SOIC and 8-lead TSSOP Packages
Die Sales: Wafer Form, Waffle Pack, and Bumped Wafers
AT24C64B
Description
The AT24C64B provides 65,536 bits of serial electrically erasable and programmable
read only memory (EEPROM) organized as 8192 words of 8 bits each. The devices
cascadable feature allows up to 8 devices to share a common 2-wire bus. The device
is optimized for use in many industrial and commercial applications where low power
and low voltage operation are essential. The AT24C64B is available in space saving
8-lead PDIP, 8-lead JEDEC SOIC and 8-lead TSSOP packages and is accessed via a
2-wire serial interface. In addition, the entire family is available in 2.7V (2.7 to 5.5V)
and 1.8V (1.8 to 5.5V) versions.
8-lead SOIC
2-Wire, 32K
Pin Configurations
2
Pin Name Function
Serial E PROM
A0 1 8 VCC
A0 - A2 Address Inputs A1 2 7 WP
A2 3 6 SCL
SDA Serial Data
GND 4 5 SDA
SCL Serial Clock Input
WP Write Protect
8-lead TSSOP
8-lead PDIP
A0 1 8 VCC
A0 1 8 VCC
A1 2 7 WP
A1 2 7 WP
A2 3 6 SCL
A2 3 6 SCL
GND 4 5 SDA
GND 4 5 SDA
3350DSEEPR05/05
1AT24C64B
Absolute Maximum Ratings*
*NOTICE: Stresses beyond those listed under Absolute
Operating Temperature...................................... -55 to +125C
Maximum Ratings may cause permanent dam-
Storage Temperature ......................................... -65 to +150C age to the device. This is a stress rating only and
functional operation of the device at these or any
Voltage on Any Pin other conditions beyond those indicated in the
with Respect to Ground ....................................... -1.0 to +7.0V operational sections of this specification is not
implied. Exposure to absolute maximum rating
Maximum Operating Voltage .......................................... 6.25V
conditions for extended periods may affect
device reliability.
DC Output Current........................................................ 5.0 mA
Block Diagram
2
3350DSEEPR05/05