 Semiconductor Components Industries, LLC, 2013

July, 2013 − Rev. 7

1

Publication Order Number:

CAT5127/D

CAT5127, CAT5129

32‐tap Digital

Potentiometers (POTs)

Description

The CAT5127/CAT5129 are single digital POTs designed as an

electronic replacement for mechanical potentiometers and trim pots.

Ideal for automated adjustments on high volume production lines, they

are also well suited for applications where equipment requiring

periodic adjustment is either difficult to access or located in a hazardous

or remote environment.

The CAT5127 contains a 32-tap series resistor array connected

An up/down counter and decoder that are controlled by three input

pins, determines which tap is connected to the wiper. The wiper

setting, stored in nonvolatile memory, is not lost when the device is

powered down and is automatically reinstated when power is returned.

The wiper can be adjusted to test new system values without effecting

the stored setting. Wiper-control of the CAT5127/CAT5129 is

accomplished with three input control pins, CS, U/D, and INC. The

INC input increments the wiper in the direction which is determined

by the logic state of the U/D input. The CS input is used to select the

device and also store the wiper position prior to power down.

The devices are used as two-terminal variable resistors. Digital

POTs bring variability and programmability to a wide variety of

applications including control, parameter adjustments, and signal

processing.

Features

Compliant

Applications

http://onsemi.com

PIN CONFIGURATIONS

See detailed ordering and shipping information in the package

dimensions section on page 8 of this data sheet.

ORDERING INFORMATION

MSOP−8

Z SUFFIX

CASE 846AD

TSOT−23

TD SUFFIX

CASE 419AF

(Top Views)

CAT5129

INC

U/D

GND

CS

CS

NC

INC

U/D

GND

1

1

MSOP (Z)

TSOT−23 (TD)

1

1

CAT5127