FN8183 Rev.10.01

Page 1 of 13

Mar 22, 2024

© 2004-2024 Renesas Electronics

X9317

Low Noise, Low Power, 100 Taps, Digitally Controlled Potentiometer (XDCP™)

DATASHEET

The X9317 is a digitally controlled potentiometer (XDCP™). The

device consists of a resistor array, wiper switches, a control

section, and nonvolatile memory. The wiper position is

controlled by a 3-wire interface.

The potentiometer is implemented by a resistor array

composed of 99 resistive elements and a wiper switching

network. Between each element and at either end are tap

points accessible to the wiper terminal. The position of the

wiper element is controlled by the CS, U/D, and INC inputs. The

position of the wiper can be stored in nonvolatile memory and

then be recalled upon a subsequent power-up operation.

The device can be used as a three-terminal potentiometer for

voltage control or as a two-terminal variable resistor for current

control in a wide variety of applications.

Applications

•LCD bias control

• DC bias adjustment

• Gain and offset trim

• Laser diode bias control

• Voltage regulator output control

Features

• Solid-state potentiometer

• 3-wire serial up/down interface

• 100 wiper tap points

- Wiper position stored in nonvolatile memory and recalled

on power-up

• 99 resistive elements

- Temperature compensated

- End-to-end resistance range ±20%

•Low power CMOS

-VCC = 2.7V to 5.5V, and 5V ±10%

- Standby current <5µA

• High reliability

- Endurance, 100,000 data changes per bit

- Register data retention, 100 years

•RTOTAL values = 10kΩ, 50kΩ

•Packages

- 8 Ld SOIC, TSSOP, and MSOP

• Pb-free (RoHS compliant)

UP/DOWN

COUNTER

7-BIT

NONVOLATILE

MEMORY

STORE AND

RECALL

CONTROL

CIRCUITRY

ONE

OF

ONE

DECODER

RESISTOR

ARRAY

RH

U/D

INC

CS

WIPER

SWITCHES

HUNDRED

VCC

VSS

RL

RW

CONTROL

AND

MEMORY

UP/DOWN

(U/D)

INCREMENT

(INC)

DEVICE SELECT

(CS)

VCC (SUPPLY VOLTAGE)

VSS (GROUND)

RH

RW

RL

GENERAL

DETAILED

0

1

2

96

97

98

99

FIGURE 1. BLOCK DIAGRAM