2

FN8192.4

October 12, 2006

PIN DESCRIPTIONS

Host Interface Pins

Serial Clock (SCL)

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

X9409.

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 guidelines for calculating typical

values on the bus pull-up resistors graph.

The address inputs are used to set the least significant

4 bits of the 8-bit slave address. A match in the slave

address serial data stream must be made with the

address input in order to initiate communication with

the X9409. A maximum of 16 devices may occupy the

2-wire serial bus.

Potentiometer Pins

terminal connections on either end of a mechanical

potentiometer.

The wiper outputs are equivalent to the wiper output of

a mechanical potentiometer.

Hardware Write Protect Input (WP)

The WP pin when low prevents nonvolatile writes to

the Data Registers.

PIN NAMES

Ordering Information

PART NUMBER

PART MARKING

(V)

POTENTIOMETER

ORGANIZATION

(k

Ω)

TEMP

RANGE

(°C)

PACKAGE

PKG.

DWG. #

X9409WS24I-2.7*

X9409WS G

2.7 to 5.5

10

-40 to 85

24 Ld SOIC (300 mil)

M24.3

X9409WS24IZ-2.7* (Note) X9409WS ZG

-40 to 85

24 Ld SOIC (300 mil) (Pb-free)

MDP0027

X9409WV24-2.7

X9409WV F

0 to 70

24 Ld TSSOP (4.4mm)

MDP0044

X9409WV24Z-2.7 (Note)

X9409WV ZF

0 to 70

24 Ld TSSOP (4.4mm) (Pb-free) MDP0044

X9409WV24I-2.7*

X9409WV G

-40 to 85

24 Ld TSSOP (4.4mm)

MDP0044

X9409WV24IZ-2.7* (Note) X9409WV ZG

-40 to 85

24 Ld TSSOP (4.4mm) (Pb-free) MDP0044

*Add "T1" suffix for tape and reel.

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate

termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL

classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

Symbol

Description

SCL

Serial Clock

SDA

Serial Data

A0-A3

Device Address

Potentiometer Pin

(terminal equivalent)

Potentiometer Pin

(wiper equivalent)

WP

Hardware Write Protection

System Supply Voltage

System Ground (Digital)

NC

No Connection

X9409