Key facts
- Brand
- Atmel
- Model
- AT24C256B
- Industry
- Industrial
- Documents
- 3
- Languages
- EN
- Last added
- 2012-06-05
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Atmel AT24C256B 256K EEPROM Datasheet
This document is a technical datasheet for the Atmel AT24C256B, a two-wire serial electrically erasable and programmable read-only memory (EEPROM). The device provides 262,144 bits of storage organized as 32,768 words of 8 bits each. It features low-voltage operation ranging from 1.8V to 3.6V and supports clock frequencies up to 1 MHz at higher voltages or 400 kHz at 1.8V.
The datasheet details the device's pin configurations, including address inputs (A2, A1, AO) for cascading up to eight devices on a single bus, and a write protect input (WP). It specifies absolute maximum ratings, DC characteristics such as supply current and voltage levels, and AC timing parameters like clock frequency limits and write cycle times. The document also covers device operation protocols, including start/stop conditions, acknowledge sequences, and software reset procedures.
Atmel AT24C256B specifications
| Storage Capacity | 262,144 bits (32,768 x 8) |
|---|---|
| Operating Voltage | 1.8V to 3.6V |
| Clock Frequency | Up to 1 MHz at 3.6V, 400 kHz at 1.8V |
| Write Cycle Time | 5 ms Max |
| Endurance | One Million Write Cycles |
| Data Retention | 40 Years |
All Atmel AT24C256B documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum write cycle endurance?
The device supports one million write cycles.
How long does data retention last?
Data can be retained for up to 40 years.
What voltage range does the AT24C256B support?
It operates from 1.8 V up to 3.6 V.
What is the endurance of the EEPROM?
The device is rated for one million write cycles.
What is the supply voltage range for the AT24C256B?
The device operates from 1.8 V up to 5.5 V.
How many write cycles can the AT24C256B endure?
It is rated for up to one million write cycles.