The document describes the features and characteristics of the AT24C32A/64A products, including low-voltage and standard-voltage operation, low-power devices, internally organized 4096 x 8, 8192 x 8, two-wire serial interface, Schmitt trigger, bidirectional data transfer protocol, etc.
The AT24C32A/AT24C64A serial EEPROMs offer 32‑Kbit (4096 × 8) and 64‑Kbit (8192 × 8) memory organized in 32‑byte pages. They operate from 1.8 V or 2.7 V up to 5.5 V and are available in 8‑lead PDIP, SOIC, EIAJ, Mini‑MAP and TSSOP packages. Features include low‑power operation, write‑protect pin, bidirectional two‑wire interface, and automotive‑grade options.
The datasheet lists absolute maximum ratings, DC and AC electrical characteristics, timing diagrams, and bus protocols. Key parameters such as supply voltage (5.5 V), operating temperature (‑55 °C to +125 °C), write‑cycle time (5 ms), endurance (1 M cycles) and data retention (100 years) are provided, along with pin descriptions and address‑pin cascading for up to eight devices on a single bus.
| Operating Temperature | -55 °C to +125 °C |
|---|---|
| Write Cycle Time | 5 ms |
| Endurance | 1 Million write cycles |
| Data Retention | 100 years |
Up to eight devices may be addressed on a single two‑wire bus.
The write cycle time is specified as 5 ms.
The devices operate from –55 °C up to +125 °C.