DS1809

DS1809 Dallastat FEATURES  64-Position Linear Taper  Two Nonvolatile Wiper Storage Options  Operates from +4.5V to +5.5V Supplies  Operating Temperature Range: - Industrial: -40°C to +85°C  Electronic Interface Provides Either Digital or Pushbutton Control  Low-Cost Alternative to Mechanical Solutions  Standard Resistance Values - DS1809-010 10kΩ - DS1809-050 50kΩ - DS1809-100 100kΩ PIN ASSIGNMENT RH 1 UC 2 STR 3 RL 4 8 VCC 7 DC 6 RW 5 GND PDIP (300 mils) SO (150 mils) μSOP (118 mils) PIN DESCRIPTION VCC - Supply Voltage RH - High End of Resistor RL - Low End of Resistor RW - Wiper Terminal UC - Up Control Input DC - Down Control Input STR - Storage Enable Input GND - Ground DESCRIPTION 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. The DS1809 is a low-power device capable of operating from power supplies of +4.5V to +5.5V. The device 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, which include an autostore capability and a command-initiated storage function. The EEPROM cell array is specified to accept greater than 50k writes. Storage of the wiper position is discussed in the Wiper Storage section of this data sheet. Wiper ...