THE DS1809 DALLASTAT IS AN NV DIGITAL POTENTIOMETER THAT PROVIDES 64 UNIFORM WIPER POSITIONS OVER THE ENTIRE RESISTOR RANGE
DALLAS, TX-June 20, 2001-The DS1809 Dallastat is a nonvolatile digitally controlled potentiometer that provides 64 uniform wiper positions over the entire resistor range, including the high-end and low-end terminals of the device. It is the only digital potentiometer with a direct pushbutton mode. Capable of operating from power supplies of +4.5V to +5.5V, the DS1809 is ideal for low-power, portable, or battery-powered applications. Wiper position is maintained in the absence of power. This is accomplished via the use of an EEPROM cell array. The device provides for two storage methods, an auto-store capability and a command-initiated storage function. The EEPROM cell array is specified to accept greater than 50k writes. Wiper positioning is controlled via a patented dual pushbutton (or contact closure) interface. For simple pushbutton-controlled applications or CPU-generated control signals, external debounce circuitry is not needed. The control interface will support both repetitive pulse inputs and continuous pulse ("push-and-hold") inputs. Two packaging options are available: 8-pin (150-mil) SOIC, and (118-mil) mSOP. Industrial temperature grade is standard.
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