This document describes the features and characteristics of the 24AA04/24LC04B devices from Microchip Technology Inc. The device is a 4 Kbit Electrically Erasable PROM, designed for low-voltage operation down to 1.8V, with standby and active currents of only 1 μA and 1 mA, respectively. It has two blocks of 256 x 8-bit memory and uses a 2-wire serial interface. The device supports page write capability for up to 16 bytes of data. It is available in various package options and temperature ranges.
The 24AA04 and 24LC04B are 4‑Kbit serial EEPROM devices that use a 2‑wire I²C‑compatible interface. They operate from a single supply voltage as low as 1.8 V, consume low active (≈1 mA) and standby (≈1 µA) currents, and offer up to 1,000,000 write/erase cycles with data retention exceeding 200 years.
The devices are offered in multiple packages (PDIP, SOIC, TSSOP, DFN, MSOP, and SOT‑23) and support clock frequencies of 100 kHz (24AA04) or 400 kHz (24LC04B). Electrical characteristics include a typical high‑level input voltage of 0.7 VCC, low‑level input of 0.3 VCC, and low‑level output of 0.40 V. Write protection is provided via the WP pin, and ESD protection exceeds 4 kV.
| Supply voltage (24AA04) | 1.8‑5.5 V |
|---|---|
| Supply voltage (24LC04B) | 2.5‑5.5 V |
| Operating temperature (Industrial) | -40 °C to +85 °C |
| Operating temperature (Automotive) | -40 °C to +125 °C |
| Active current | ≈1 mA (typical) |
| Write/erase endurance | 1,000,000 cycles |
| Data retention | > 200 years |
| ESD protection | > 4,000 V |
| Package options | PDIP, SOIC, TSSOP, DFN, MSOP, SOT‑23 |
| Clock frequency | 100 kHz (24AA04) / 400 kHz (24LC04B) |
| Write cycle time | 5 ms |
| High‑level input voltage (VIH) | 0.7 VCC |
| Low‑level input voltage (VIL) | 0.3 VCC |
| Low‑level output voltage (VOL) | 0.40 V |
The device is rated for up to 1,000,000 erase/write cycles.
Available packages include 8‑lead PDIP, SOIC, TSSOP, DFN, MSOP, and a 5‑lead SOT‑23.
Write protection is enabled by tying the WP pin to VCC, which protects the entire memory array.