Description

The AT24C32A/64A is a memory component that provides 32,768/65,536 bits of serial electrically erasable and programmable read-only memory (EEPROM). It is organized as 4096/8192 words of 8 bits each. The device has a cascading feature, allowing up to 8 devices to share a common 2-wire bus. It is optimized for use in various industrial and commercial applications that require low power and low voltage operation. The AT24C32A/64A is available in different packages and can be accessed through a 2-wire serial interface. It is available in both 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 5.5V) versions.

Specifications and features

• Low-Voltage and Standard-Voltage Operation - 2.7V (VCC = 2.7V to 5.5V), 1.8V (VCC = 1.8V to 5.5V)
• Low-Power Devices (ISB = 6 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) and 400 kHz (2.5V) Clock Rate for AT24C32A
• 400 kHz (1.8V) Clock Rate for AT24C64A
• 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 Grade, Extended Temperature, and Lead-free/Halogen-free Devices Available
• Available in 8-lead JEDEC PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead MAP, and 8-lead TSSOP Packages

Application Scenarios

The AT24C32A/64A is suitable for use in a wide range of applications, including but not limited to:

• Industrial control systems
• Data logging
• Consumer electronics
• Medical devices

Comparison

• Low power consumption
• Wide voltage range operation
• High reliability and data retention
• Various package options

• Limited storage capacity (32,768/65,536 bits)
• Requires a 2-wire serial interface
• Not suitable for applications requiring higher data transfer rates