The 24AA32A/24LC32A is Microchip Technology Inc.'s 32-bit electrically erasable programmable read-only memory (EEPROM). The device is organized as four 8K x 8-bit memories with a 2-wire serial interface. Low-voltage design allows operation down to 1.8V, with standby and active currents of only 1μA and 1mA, respectively. It has been developed for advanced low-power applications such as personal communications or data acquisition. The 24XX32A also has a page write buffer that can store 32 bytes of data.
The 24AA32A/24LC32A is a 32‑Kbit serial EEPROM from Microchip that operates over a wide supply range down to 1.8 V. It offers low active and standby currents, Schmitt‑trigger inputs, and can be cascaded with up to eight devices on a single I²C bus. The device is available in PDIP, SOIC, TSSOP and MSOP packages and supports both industrial and automotive temperature ranges.
The datasheet details electrical characteristics such as a 1.8‑5.5 V supply range, up to 400 kHz clock frequency, 1 Mcycle endurance, and >200‑year data retention. Functional sections describe the 2‑wire bus protocol, device addressing, write operations (byte and page), and write‑protect features. Additional notes cover code‑protection policies and Microchip contact information.
| Memory size | 32 Kbit |
|---|---|
| Supply voltage range | 1.8 V to 5.5 V |
| Industrial temperature range | -40 °C to +85 °C |
| Automotive temperature range | -40 °C to +125 °C |
| Maximum clock frequency (2.5‑5.5 V) | 400 kHz |
| Maximum clock frequency (<2.5 V) | 100 kHz |
| Write endurance | 1,000,000 erase/write cycles |
| Data retention | > 200 years |
| Typical page write cycle time | 2 ms |
| Package types | PDIP, SOIC, TSSOP, MSOP |
It operates from 1.8 V up to 5.5 V.
Up to eight devices can be cascaded on a single bus.
The device is rated for 1,000,000 erase/write cycles.
At 2.5 V the maximum clock frequency is 100 kHz.