X24321

2

PIN DESCRIPTIONS

Serial Clock (SCL)

The SCL input is used to clock all data into and out of

the device.

Serial Data (SDA)

SDA is a bidirectional pin used to transfer data into

and out of the device. It is an open drain output and

may be wire-ORed with any number of open drain or

open collector outputs.

An open drain output requires the use of a pull-up

resistor. For selecting typical values, refer to the Pull-

up resistor selection graph at the end of this data

sheet.

the first three bits of the 8-bit slave address. This

allows up to eight devices to share a common bus.

These inputs can be static or actively driven. If used

priate. If actively driven, they must be driven with

CMOS levels.

Write Protect (WP)

The Write Protect input controls the Hardware Write

Protect feature. When held LOW, Hardware Write

Protection is disabled and the device can be written

normally. When this input is held HIGH, Write Protec-

tion is enabled, and nonvolatile writes are disabled to

PIN NAMES

7040 FRM T01

PIN CONFIGURATION

Symbol

Description

Device Select Inputs

SDA

Serial Data

SCL

Serial Clock

WP

Write Protect

Ground

Supply Voltage

VCC

WP

SCL

SDA

S0

S1

S2

VSS

1

2

3

4

8

7

6

5

X24321

8-LEAD SOIC

7040 FM 02