Key facts
- Brand
- Atmel
- Model
- AT24C128B
- Documents
- 2
- Languages
- EN
- Last added
- 2012-04-10
Start here
Atmel AT24C128B Serial EEPROM Datasheet
The AT24C128B is a 128‑Kbit (16,384 × 8) two‑wire serial EEPROM offered in multiple 8‑lead packages such as PDIP, SOIC, TSSOP and BGA. It operates from 1.8 V to 5.5 V, supports up to eight devices on a common bus, and is suited for industrial and commercial low‑power applications. The device includes a write‑protect pin, 64‑byte page write mode, and a self‑timed write cycle.
The datasheet details absolute maximum ratings, DC and AC electrical characteristics, pin functions, memory organization (256 pages of 64 bytes), device addressing, standby mode, and software reset procedures. It also provides revision history and Atmel contact information.
Atmel AT24C128B specifications
| Supply Voltage | 1.8 V – 5.5 V |
|---|---|
| Write Cycle Time | 5 ms (typ) |
| Endurance | 1 000 000 write cycles |
| Data Retention | 40 years |
| Maximum Clock Frequency | 1 MHz (5.5 V, 2.5 V) / 400 kHz (1.8 V) |
All Atmel AT24C128B documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
How many AT24C128B devices can be connected on the same two‑wire bus?
Up to eight devices can share a common two‑wire bus.
What does the WRITE PROTECT (WP) pin do?
When WP is tied to GND normal writes are allowed; when tied to VCC all write operations are inhibited.
What is the operating voltage range for the AT24C128B?
The device operates from 1.8 V to 5.5 V.
How many write cycles can the AT24C128B endure?
It can endure up to one million write cycles.