42568WP 데이터 시트보기 (PDF) - STMicroelectronics

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42568WP

256 Kbit Serial I2C Bus EEPROM / 4256BWP / SOP8

STMicroelectronics 

Description

1

Description

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

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-D 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

6##



%%

3#,

7#

-XXX

3$!

Signal name

E2, E1, E0

SDA

SCL

WC

VCC

VSS

633

Table 1. Signal names

Function

Chip Enable

Serial Data

Serial Clock

Write Control

Supply voltage

Ground

!)F

Input

I/O

Input

Input

-

-

Direction

6/39

DocID6757 Rev 32

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