The AT24C128/256 is a 131,072/262,144-bit serial electrically erasable and programmable read only memory (EEPROM) organized as 16,384/32,768 words of 8 bits each.
This document describes the Atmel AT24C128 and AT24C256, which are low-voltage serial electrically erasable programmable read-only memory (EEPROM) devices. They offer capacities of 131,072 bits and 262,144 bits respectively, organized as 16,384 or 32,768 words of 8 bits each.
| Memory Capacity (AT24C128) | 131,072 bits / 16,384 words of 8 bits |
|---|---|
| Memory Capacity (AT24C256) | 262,144 bits / 32,768 words of 8 bits |
| Endurance | 100,000 Write Cycles |
| Data Retention | 40 Years |
| Operating Temperature Range | -55°C to +125°C |
| Maximum Operating Voltage | 6.25V |
The devices are available in 5.0V (4.5V to 5.5V), 2.7V (2.7V to 5.5V) and 1.8V (1.8V to 3.6V) versions.
The device's cascadable feature allows up to 4 devices to share a common 2-wire bus.