6732-2.0 5/30/97 T1/C0/D0 SH

1

Characteristics subject to change without notice

A V A I L A B L E

Low Noise, Low Power, 32 Taps

X9315

FEATURES

• Low Power CMOS

—Active Current, 50

µA (Increment) max

—Active Current, 400

µA (Store) Max

—Standby Current, 1

µA Max

• Low Noise

• 31 Resistive Elements

—Temperature Compensated

—

± 20% End to End Resistance Range

• 32 Wiper Tap Points

—Wiper Positioned via Three-Wire Interface

—Similar to TTL Up/Down Counter

—Wiper Position Stored in Nonvolatile Memory

and Recalled on Power-Up

• 100 Year Wiper Position Data Retention

• X9315Z = 1K

Ω

• X9315W = 10K

Ω

• Packages

—8-Lead SOIC

—8-Lead MSOP

—8-Pin DIP

DESCRIPTION

The Xicor X9315 is a solid state "micropower" nonvol-

atile potentiometer and is ideal for digitally controlled

resistance trimming.

The X9315 is a resistor array composed of 31 resistive

elements. Between each element and at either end are

tap points accessible to the wiper element. The posi-

tion 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 sub-

sequent power-up operation.

The resolution of the X9315 is equal to the maximum

resistance value divided by 31. As an example, for the

X9315W (10K

Ω) each tap point represents 323Ω.

All Xicor nonvolatile digital potentiometers are de-

signed and tested for applications requiring extended

endurance and data retention.

FUNCTIONAL DIAGRAM

5-BIT

UP/DOWN

COUNTER

5-BIT

NONVOLATILE

MEMORY

STOREAND

RECALL

CONTROL

CIRCUITRY

ONE

OF

THIRTY-

TWO

WIPER

POSITION

DECODER

RESISTOR

ARRAY

VL

VW

VH

U/D

INC

CS

CMOS SWITCH

6732 FM1

AN104