Dallastat Electronic Digital Rheostat
www.maxim-ic.com
DS1669 Dallastat Electronic Digital Rheostat
FEATURES
§ Replaces mechanical variable resistors § Elec...
Description
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) UC
D (RL)
1 2 3 4
8 +V 7 DC 6 RW 5 -V
8-Pin DIP (300-mil) See Mech. Drawings Section
PIN DESCRIPTION DS1669
RH RW RL -V, +V
- High Terminal of Potentiometer - Wiper Terminal of Potentiometer - 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 EEPROM memory cell arra...
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