CAT5127ZD7I-10-T3 datasheet(2/12 Pages) CATALYST

Part #	CAT5127ZD7I-10-T3

Description	32-Tap Digitally Programmable Potentiometer (DPP TM)

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Manufacturer	CATALYST [Catalyst Semiconductor]

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CAT5127, CAT5129

Doc. No. 2127 Rev. A

2

Characteristics subject to change without notice

PIN CONFIGURATION

MSOP/TDFN

CAT5127

INC

¯¯¯

1

8 VCC

U/D

¯

2

7 CS

¯¯

RH

3

6 RL

GND

4

5 NC

TSOT23-6

CAT5129

CS

¯¯

1

6 VCC

GND

2

5 RH

U/D

¯

3

4 INC

¯¯¯

PIN DESCRIPTIONS

DEVICE DESCRIPTION

INC

¯¯¯: Increment Control Input

The INC

¯¯¯ input moves the wiper in the up or down

direction determined by the condition of the U/D

¯ input.

U/D

¯: Up/Down Control Input

The U/D

¯ input controls the direction of the wiper

movement. When in a high state and CS

¯¯ is low, any

high-to-low transition on INC

¯¯¯ will cause the wiper to

move one increment toward the RH terminal. When in

a low state and CS

¯¯ is low, any high-to-low transition

on INC

¯¯¯ will cause the wiper to move one increment

towards the RL terminal.

RH: High End Potentiometer Terminal

RH is the high end terminal of the potentiometer. It is

not required that this terminal be connected to a

potential greater than the RL terminal. Voltage applied

to the RH terminal cannot exceed the supply voltage,

VCC or go below ground, GND.

RL: Low End Potentiometer Terminal (CAT5127 only)

RL is the low end terminal of the potentiometer. It is

not required that this terminal be connected to a

potential less than the RH terminal. Voltage applied to

the RL terminal cannot exceed the supply voltage, VCC

or go below ground, GND. RL and RH are electrically

interchangeable.

CS

¯¯ : Chip Select

The chip select input is used to activate the control

input of the device and is active low. When in a high

state, activity on the INC

¯¯¯ and U/D

¯ inputs will not affect

or change the position of the wiper.

VCC: Supply Input for the device.

Name Function

CAT5127

MSOP/TDFN

CAT5129

SOT23

INC

¯¯¯

Increment Control

1

4

U/D

¯

Up/Down Control

2

3

RH

Potentiometer High

Ti l

3

5

GND Ground

4

2

NC

No Connect

5

-

RL

Potentiometer Low

Ti l

6

-

CS

¯¯

Chip Select

7

1

VCC Supply Voltage

8

6

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CAT5127ZD7I-10-T3 Datasheet(PDF) 2 Page - Catalyst Semiconductor

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