4256BWP datasheet(6/41 Pages) STMICROELECTRONICS

6 / 41 page

Description

M24256-BW M24256-BR M24256-BF M24256-DR M24256-DF

6/41

Doc ID 6757 Rev 28

Description

The M24256 is a 256-Kbit I2C-compatible EEPROM (Electrically Erasable PROgrammable

Memory) organized as 32 K × 8 bits.

The M24256-BW can operate with a supply voltage from 2.5 V to 5.5 V, the M24256-BR and

M24256-DR can operate with a supply voltage from 1.8 V to 5.5 V, and the M24256-BF and

M24256-DF can operate with a supply voltage from 1.7 V to 5.5 V. All these devices operate

with a clock frequency of 1 MHz (or less), over an ambient temperature range of –40 °C /

+85 °C.

The M24256-Dx offers an additional page, named the Identification Page (64 bytes). The

Identification Page can be used to store sensitive application parameters which can be

(later) permanently locked in Read-only mode.

Figure 1.

Logic diagram

Table 1.

Signal names

Signal name

Function

Direction

E2, E1, E0

Chip Enable

Input

SDA

Serial Data

I/O

SCL

Serial Clock

Input

Write Control

Input

VCC

Supply voltage

VSS

Ground

4256BWP Datasheet(PDF) 6 Page - STMicroelectronics