DESCRIPTION

The DS1869 DallastatTM is a digital rheostat or potentiometer. This device provides 64 possible uniform tap points over the entire resistive range. The standard resistive ranges are 10 kΩ, 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. The DS1869 operates from 3V or 5V supplies. 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.

FEATURES

● Replaces mechanical variable resistors

● Operates from 3V or 5V supplies

● Electronic interface provided for digital as well as manual control

● Internal pull-ups with debounce for easy interfacing to mechanical push buttons

● Wiper position is maintained in the absence of power

● Low cost alternative to mechanical controls

● Applications include volume, tone, contrast, brightness, and dimmer control

● 8-pin SOIC and 8-pin DIP packages are available

● Standard resistance values for Dallastat

- DS1869-10 ~ 10 kΩ

- DS1869-50 ~ 50 kΩ

- DS1869-100 ~ 100 kΩ

● Operating temperature range:

- Industrial: -40°C to +85°C

● 3V to 8V differential supply operational range