AT24HC02B is a 2048 bit serial electrically erasable and programmable read-only memory (EEPROM) organized as 256 words of 8 bits each. The device is optimized for use in many industrial and commercial applications where low-power and low-voltage operation are essential. The AT24HC02B is available in space-saving 8-lead PDIP, 8-lead JEDEC SOIC and 8-lead TSSOP packages and is accessed via a two-wire serial interface. In addition, the entire family is available in 1.8V (1.8V to 5.5V) version.
The AT24HC02B EEPROM provides 2048 bits of non‑volatile memory organized as 256 × 8 bits. It operates from 1.8 V to 5.5 V and includes a write‑protect pin, Schmitt‑triggered inputs, and a two‑wire (I²C) serial interface. The device is offered in 8‑lead PDIP, SOIC and TSSOP packages.
The datasheet specifies electrical characteristics such as supply voltage range, clock rates (1 MHz at 5 V, 400 kHz at lower voltages), write‑cycle time (5 ms max), and endurance (1 million write cycles). Pin descriptions, memory organization, device addressing, and timing diagrams are provided for designers.
| Supply Voltage | 1.8 V – 5.5 V |
|---|---|
| Operating Temperature | -55 °C to +125 °C |
| Write Cycle Time | 5 ms max |
| Endurance | 1 Million write cycles |
| Page Size | 8 bytes per page |
The WP pin provides hardware data protection; when tied to GND normal read/write operations are allowed, and when tied to VCC the protected half of the array is write‑protected.
The device is rated for one million write cycles.
The EEPROM supports a 1 MHz clock at 5 V and a 400 kHz clock at 1.8 V, 2.5 V, or 2.7 V.