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120299

FEATURES

Replaces mechanical variable resistors

Electronic interface provided for digital as

well as manual control

Wide differential input voltage range

between 4.5 and 8 volts

Wiper position is maintained in the absence

of power

Low-cost alternative to mechanical controls

Applications include volume, tone, contrast,

brightness, and dimmer control

Available in 8-pin SOIC and 8-pin DIP

packages

Standard resistance values for Dallastat:

− DS1669-10 ~ 10 kΩ

− DS1669-50 ~ 50 kΩ

− DS1669-100 ~ 100 kΩ

Operating Temperature Range

− Industrial: -40°C to +85°C

PIN ASSIGNMENT DS1669

PIN DESCRIPTION DS1669

- High Terminal of Potentiometer

- Wiper Terminal of Potentiometer

- Low Terminal of Potentiometer

-V, +V

- Voltage Inputs

UC

- Up Contact Input

D

- Digital Input

DC

- Down Contact Input

DESCRIPTION

tap points over the entire resistive range. The standard resistive ranges are 10 k

Ω, 50 kΩ, and 100 kΩ.

The Dallastat can be controlled by either a switch contact closure input or a digital source input such as a

CPU. Wiper position is maintained in the absence of power through the use of a EEPROM memory cell

array. The EEPROM cell array will withstand more than 50,000 writes.

The DS1669 is offered in two standard IC packages which include an 8-pin 300-mil DIP and an 8-pin

208-mil SOIC. The DS1669 can be configured to operate using a single pushbutton, dual pushbutton or

digital source input by varying power-on conditions. This is illustrated in Figures 1 and 2. The DS1669

DS1669

Dallastat

www.dalsemi.com

+V

DC

-V

D

UC

8

7

6

5

1

2

3

4

8-Pin DIP (300-mil)

See Mech. Drawings Section

1

2

3

4

8

7

6

5

+V

DC

V-

D

UC

8-Pin SOIC (208-mil)

See Mech. Drawings Section