X9116 Datasheet | Xicor

FEATURES - - - - - - - - Solid-state nonvolatile 16 wiper taps 3-wire up/down serial interface VCC = 2.7V and 5V Active current < 50µA max. Standby current < 1µA max. RTOTAL = 10KΩ Packages: MSOP-8, SOIC DESCRIPTION The Xicor X9116 is a digitally controlled nonvolatile potentiometer designed to be used in trimmer applications. The pot consists of 15 equal resistor segments that connect to the wiper pin through programmable CMOS switches. The tap position is programmed through a 3-wire up/down serial port. The last position of the wiper is stored in a nonvolatile memory location which is recalled at the time of power up of the device. The wiper moves through sequential tap positions with inputs on the serial port. A falling edge on INC (bar) causes the tap position to increment one position up or down based on whether the U/D (bar) pin is held high or low. The X9116 can be used in many applications requiring a variable resistance. In many cases it can replace a mechanical trimmer and offers many advantages such as temperature and time stability as well as the reliability of a solid state solution. BLOCK DIAGRAM VCC (Supply Voltage) Up/Down (U/D) Increment (INC) Device Select (CS) Control and Memory RH/VH RW/VW RL/VL VSS (Ground) General RH 13 - 3 2 1 RL 0 RW-RL Resistance 15 14 10kΩ 9.34kΩ 8.68kΩ - kΩ 2.08kΩ 1.42kΩ 760Ω 100Ω REV 1.2 2/5/03 .xicor. Characteristics subject to change without notice. 1 of 11 PIN DESCRIPTIONS VH /RH and VL /RL The high (VH/RH) and low (VL/RL) terminals of the X9116 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is VSS and the maximum is VCC. VW/RW Rw/Rw is the wiper terminal and is equivalent to the movable terminal of a mechanical potentiometer. The position of the wiper within the array is determined by the control inputs. The wiper terminal series resistance is typically 200Ω to 400Ω depending upon VCC. Up/Down (U/D) The U/D input controls the direction of the wiper movement and...