X9312

2

PIN DESCRIPTIONS

are equivalent to the fixed terminals of a mechanical

potentiometer. The minimum voltage is 0V and the

maximum is +15V. It should be noted that the

of the terminal in relation to wiper movement direction

selected by the U/

D input and not the voltage potential on

the terminal.

Vw is the wiper terminal, equivalent to the movable

terminal of a mechanical potentiometer. The position

of the wiper within the array is determined by the

control inputs. The wiper terminal series resistance is

typically 40

Ω.

Up/Down (U/

D)

The U/

D input controls the direction of the wiper move-

ment and whether the counter is incremented or

decremented.

Increment (

INC)

The

INC input is negative-edge triggered. Toggling INC

will move the wiper and either increment or decrement

the counter in the direction indicated by the logic level on

the U/

D input.

Chip Select (

CS)

The device is selected when the

CS input is LOW. The

current counter value is stored in nonvolatile memory

when

CS is returned HIGH while the INC input is also

HIGH. After the store operation is complete the X9312

will be placed in the low power standby mode until the

device is selected once again.

PIN CONFIGURATION

PIN NAMES

Symbol

Description

High Terminal

Wiper Terminal

Low Terminal

Ground

Supply Voltage

U/

D

Up/Down Input

INC

Increment Input

CS

Chip Select Input

3865 PGM T01

VCC

CS

VL

VW

3863 FHD F02.1

INC

U/D

VH

VSS

1

2

3

4

8

7

6

5

X9312

DIP/SOIC