The AT24C32A/64A is a 32,768/65,536-bit serial electrically erasable and programmable read only memory (EEPROM) organized as 4096/8192 words of 8 bits each and is optimized for use in many industrial and commercial applications where low power and low voltage operation are essential.
The AT24C32A/AT24C64A devices provide 32‑Kbit or 64‑Kbit serial EEPROM organized as 4096 × 8 or 8192 × 8 bits. They operate over a low‑voltage range and support up to eight devices on a common two‑wire I²C bus, making them suitable for industrial and commercial applications where low power consumption is essential.
Key features include a 400 kHz maximum clock frequency, 5 ms write‑cycle time, 1 M write‑cycle endurance, and 100‑year data retention. The datasheet also lists pin configurations for various 8‑lead packages, absolute‑maximum ratings, and detailed timing diagrams for start/stop conditions, acknowledgments, and standby mode.
| Supply Voltage | 1.8 V – 5.5 V |
|---|---|
| Operating Temperature | -55 °C to +125 °C |
| Maximum Clock Frequency | 400 kHz |
| Write Cycle Time | 5 ms |
| Endurance | 1 Million Write Cycles |
| Data Retention | 100 Years |
| Cascadable Devices | Up to 8 devices on one bus |
Up to eight devices can be cascaded on a common two‑wire bus.
The write‑cycle time is specified as 5 ms.
The device operates from –55 °C to +125 °C.
The EEPROM works with a supply voltage between 1.8 V and 5.5 V.