X93256

DATASHEET X93256 Dual Digitally Controlled Potentiometers (XDCPs™) The Intersil X93256 is a dual digitally controlled potentiometer (XDCP). The device consists of two resistor arrays, wiper switches, a control section, and nonvolatile memory. The wiper positions are controlled by individual Up/Down interfaces. A potentiometer is implemented by a resistor array composed of 31 resistive elements and a wiper switching network. The position of each wiper element is controlled by a set of independent CS, U/D, and INC inputs. The position of the wiper can be stored in nonvolatile memory and then be recalled upon a subsequent power-up operation. Each potentiometer is connected as a three-terminal variable resistor and can be used in a wide variety of applications including: Bias and Gain Control LCD Contrast Adjustment Pinout X93256 (14 LD TSSOP) TOP VIEW Rw1 RL1 1 2 14 13 CS1 3 12 INC2 4 11 U/D2 5 10 RH2 VSS 6 7 9 8 *NC can be left unconnected, or connected to any voltage between VSS and VCC. RH1 U/D1 INC1 VCC CS2 RL2 Rw2 FN8188 Rev 2.00 February 1, 2008 Features Dual solid-state potentiometers Individual Up/Down interfaces 32 wiper tap points per potentiometer - Wiper position stored in nonvolatile memory and recalled on power-up 31 resistive elements per potentiometer - Temperature compensated - Maximum resistance tolerance of ±25% - Terminal voltage, 0 to VCC Low power CMOS - VCC = 2.7V to 5.5V. - Active current, 200µA typical per potentiom...