Key facts
- Brand
- Atmel
- Model
- AT24C64A
- Documents
- 3
- Languages
- EN
- Last added
- 2012-05-09
Start here
Atmel AT24C32A/AT24C64A EEPROM Datasheet
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.
Atmel AT24C64A specifications
| Operating Temperature | -55 °C to +125 °C |
|---|---|
| Write Cycle Time | 5 ms |
| Endurance | 1 Million write cycles |
| Data Retention | 100 years |
All Atmel AT24C64A documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
How many AT24C32A/AT24C64A devices can be cascaded on a single bus?
Up to eight devices may be addressed on a single two‑wire bus.
What is the maximum write cycle time for these EEPROMs?
The write cycle time is specified as 5 ms.
How many AT24C32A/AT24C64A devices can be connected on the same two‑wire bus?
Up to eight devices can be cascaded on a common two‑wire bus.
What is the maximum write‑cycle time for the AT24C32A/AT24C64A?
The write‑cycle time is specified as 5 ms.
What is the maximum clock frequency for the AT24C64A?
The device supports a maximum clock frequency of 400 kHz.
How many write cycles can the AT24C64A endure?
It is rated for up to 1 million write cycles.