Key facts
- Brand
- Atmel
- Model
- AT25128A
- Documents
- 2
- Languages
- EN
- Last added
- 2012-03-27
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Atmel AT25128A/AT25256A EEPROM Datasheet
The AT25128A and AT25256A are serial electrically‑erasable programmable read‑only memories (EEPROM) offered in 128 Kbit and 256 Kbit densities. They operate with a standard‑voltage range of 2.7 V to 5.5 V, support SPI modes 0 and 3, and feature a 5 MHz maximum clock rate. The devices include 64‑byte page mode, block write protection, and a self‑timed write cycle of up to 5 ms.
The datasheet details pin configurations for SOIC and TSSOP packages, absolute maximum ratings, DC and AC electrical characteristics, and the full instruction set for read, write, and status operations. Mechanical drawings and revision history are also provided for design reference.
Atmel AT25128A specifications
| Supply voltage | 2.7 V to 5.5 V |
|---|---|
| Maximum clock rate | 5 MHz |
| Endurance | 1 Million write cycles |
| Data retention | >100 years |
| Operating temperature range | -40 °C to +125 °C |
| Page mode size | 64 bytes |
All Atmel AT25128A documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum SPI clock frequency?
The device supports up to a 5 MHz clock rate.
What supply voltage range does the EEPROM operate at?
It operates from 2.7 V to 5.5 V.
What is the maximum SPI clock frequency?
The device supports up to 20 MHz clock rate when powered at 5 V.
Which package types are available for the AT25128A?
It is offered in 8‑lead PDIP, 8‑lead SOIC, 8‑lead TSSOP, 8‑ball dBGA2, and 8‑lead Ultra Thin SAP packages.