DS1669S

www.maxim-ic.com DS1669 Dallastat Electronic Digital Rheostat FEATURES § Replaces mechanical variable resistors § Electronic interface provided for digital as well as manual control § Wide differential input voltage range between 4.5 and 8V § 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 (RH) 1 8 +V UC 2 7 DC D 3 6 RW (RL) 4 5 V- 8-Pin SOIC (208-mil) See Mech. Drawings Section (RH) 1 UC 2 D3 (RL) 4 8 +V 7 DC 6 RW 5 -V 8-Pin DIP (300-mil) See Mech. Drawings Section PIN DESCRIPTION DS1669 RH - High Terminal of Potentiometer RW - Wiper Terminal of Potentiometer RL -V, +V - Low Terminal of Potentiometer - Voltage Inputs UC - Up Contact Input D - Digital Input DC - Down Contact Input DESCRIPTION The DS1669 Dallastat 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 kW, 50 kW, and 100 kW. 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 EEPRO...