REV 1.2 2/5/03

Characteristics subject to change without notice.

1 of 11

www.xicor.com

X9116

FEATURES

• Solid-state nonvolatile

• 16 wiper taps

• 3-wire up/down serial interface

• Active current < 50µA max.

• Standby current < 1µA max.

• Packages: MSOP-8, SOIC

DESCRIPTION

The Xicor X9116 is a digitally controlled nonvolatile

potentiometer designed to be used in trimmer applica-

tions. The pot consists of 15 equal resistor segments

that connect to the wiper pin through programmable

CMOS switches. The tap position is programmed

through a 3-wire up/down serial port. The last position

of the wiper is stored in a nonvolatile memory location

which is recalled at the time of power up of the device.

The wiper moves through sequential tap positions with

inputs on the serial port. A falling edge on INC (bar)

causes the tap position to increment one position up or

down based on whether the U/D (bar) pin is held high

or low.

The X9116 can be used in many applications requiring

a variable resistance. In many cases it can replace a

mechanical trimmer and offers many advantages such

as temperature and time stability as well as the reli-

ability of a solid state solution.

BLOCK DIAGRAM

Control

and

Memory

Up/Down

(U/D)

Increment

(INC)

Device Select

(CS)

General

0

1

2

3

*

13

14

15

10k

Ω

9.34k

Ω

8.68k

Ω

* k

Ω

2.08k

Ω

1.42k

Ω

760

Ω

100

Ω

A V A I L A B L E

AN99 • AN115 • AN120 • AN124 • AN133 • AN134

Low Noise, Low Power, Low Cost