 Semiconductor Components Industries, LLC, 2013

July, 2013 − Rev. 9

1

Publication Order Number:

CAT5251/D

CAT5251

Quad Digital

Potentiometer (POT)

with 256 Taps

and SPI Interface

Description

The CAT5251 is four digital POTs integrated with control logic and

16 bytes of NVRAM memory. Each digital POT consists of a series of

resistive elements connected between two externally accessible end

points. The tap points between each resistive element are connected to

the wiper outputs with CMOS switches. A separate 8-bit control

register (WCR) independently controls the wiper tap switches for each

digital POT. Associated with each wiper control register are four 8-bit

non-volatile memory data registers (DR) used for storing up to four

wiper settings. Writing to the wiper control register or any of the

non-volatile data registers is via a SPI serial bus. On power-up, the

contents of the first data register (DR0) for each of the four

potentiometers is automatically loaded into its respective wiper

control register.

The CAT5251 can be used as a potentiometer or as a two terminal,

variable resistor. It is intended for circuit level or system level

adjustments in a wide variety of applications. It is available in the

−40C to 85C industrial operating temperature range and offered in a

24-lead SOIC and TSSOP package.

Features

Potentiometer

Compliant

http://onsemi.com

TSSOP−24

Y SUFFIX

CASE 948AR

PIN CONNECTIONS

SOIC−24 (W)

TSSOP−24 (Y)

(Top View)

HOLD

SO

A0

1

SCK

SOIC−24

W SUFFIX

CASE 751BK

See detailed ordering and shipping information in the package

dimensions section on page 13 of this data sheet.

ORDERING INFORMATION

NC

GND

NC

CAT5251

A1

SI

CS

WP