描述 Description

The AT24C32/64 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 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 AT24C32/64 is available in space saving 8-pin JEDEC PDIP, 8-pin and 14-pin JEDEC SOIC, 8-pin EIAJ SOIC, and 8-pin TSSOP packages and is accessed via a 2-wire serial interface.

In addition, the entire family is available in 5.0V (4.5V to 5.5V), 2.7V (2.7V to 5.5V), 2.5V (2.5V to 5.5V) and 1.8V (1.8V to 5.5V) versions.

特性 Features

? Low-Voltage and Standard-Voltage Operation

– 5.0 (VCC = 4.5V to 5.5V)

– 2.7 (VCC = 2.7V to 5.5V)

– 2.5 (VCC = 2.5V to 5.5V)

– 1.8 (VCC = 1.8V to 5.5V)

? Low-Power Devices (ISB = 2 μA @ 5.5V) Available

? Internally Organized 4096 x 8, 8192 x 8

? 2-Wire Serial Interface

? Schmitt Trigger, Filtered Inputs for Noise Suppression

? Bidirectional Data Transfer Protocol

? 100 kHz (1.8V, 2.5V, 2.7V) and 400 kHz (5V) Compatibility

? Write Protect Pin for Hardware Data Protection

? 32-Byte Page Write Mode (Partial Page Writes Allowed)

? Self-Timed Write Cycle (10 ms max)

? High Reliability

– Endurance: 1 Million Write Cycles

– Data Retention: 100 Years

– ESD Protection: >3,000V

? Automotive Grade and Extended Temperature Devices Available

? 8-Pin JEDEC PDIP, 8-Pin and 14-Pin JEDEC SOIC, 8-Pin EIAJ SOIC,

and 8-pin TSSOP Packages