Features
• Low-Voltage and Standard-Voltage Operation
– 2.7 (VCC = 2.7V to 5.5V)
– 1.8 (VCC = 1.8V to 5.5V)
• Low-Power Devices (ISB = 6 μA @ 5.5V) Available
• Internally Organized 4096 x 8, 8192 x 8
• Two-wire Serial Interface
• Schmitt Trigger, Filtered Inputs for Noise Suppression
• Bidirectional Data Transfer Protocol
• 400 kHz (1.8V, 2.5V, 2.7V, 5V) Compatibility
• 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
• Automotive Devices Available
• 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead Mini-MAP (MLP 2x3)
and 8-lead TSSOP Packages
• Lead-free/Halogen-free
• Die Sales: Wafer Form, Waffle Pack, and Bumped Wafers

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 twowire
bus. The device is optimized for use in many industrial and commercial applications
where low power and low voltage operation are essential. The AT24C32A/64A is
available in space saving 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ
SOIC, 8-lead Mini-MAP (MLP 2x3) and 8-lead TSSOP packages and is accessed via
a 2-wire serial interface. In addition, the entire family is available in 2.7V (2.7V to 5.5V)
and 1.8V (1.8V to 5.5V) versions.

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