DATASHEET ISL95311 FN8084 Rev 2.00 Digitally Controlled Potentiometer (XDCP), 2 August 13, 2015 Terminal Voltage 0V to 13.2V, 128 Taps I C Interface The Intersil ISL95311 is a digitally controlled potentiometer Features (XDCP). The device consists of a resistor array, wiper Non-volatile solid-state potentiometer switches, a control section, and nonvolatile memory. The 2 2 wiper position is controlled by an I C interface. I C serial interface The potentiometer is implemented by a resistor array DCP terminal voltage, 0V to +13.2V composed of 127 resistive elements and a wiper switching 128 wiper tap points - 0.8% resolution network. Between each element and at either end are tap - Wiper position stored in nonvolatile memory and points accessible to the wiper terminal. The wiper of the recalled on power-up potentiometer has an associated volatile Wiper Counter 127 resistive elements Register (WR) and a non-volatile Initial Value Register (IVR) - Temperature compensated that can be directly written to and read by the user. The contents of the WR controls the position of the wiper on the - Low wiper resistance 70 typical 3.3V resistor array through the switches. At power-up, the device Low power CMOS recalls the contents of the IVR to the corresponding WR. - Standby current, 2A V = +3.6V CC The device can be used as a three-terminal potentiometer or High reliability as a two-terminal variable resistor in a wide variety of - Endurance, 200,000 data changes per bit applications, including: - Register data retention 50 years T +75C LCD contrast control R values = 10k50k TOTAL Parameter and bias adjustments 10 Ld MSOP package Industrial and automotive control Pb-free (RoHS compliant) Mechanical pot replacement Pinout ISL95311 (10-LD MSOP) TOP VIEW SCL SDA 1 10 GND 2 9 V+ V 3 8 CC R L 4 7 A1 R W A0 5 6 R H Ordering Information PART NUMBER RESISTANCE OPTION TEMP RANGE PACKAGE (Note) PART MARKING ( ) (C) (Pb-Free) PKG. DWG. ISL95311WIU10Z AJE 10k -40 to +85 10-Ld MSOP M10.118 Add -TK suffix for tape and reel. Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate PLUS ANNEAL - e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. FN8084 Rev 2.00 Page 1 of 12 August 13, 2015ISL95311 Block Diagram 7-BIT SDA WIPER R 127 H REGISTER SCL V+ VCC (VOLATILE) 126 125 SDA R H SCL 7-BIT 124 CONTROL NONVOLATILE R AND MEMORY ONE W A1 MEMORY OF TRANSFER RESISTOR GATES 128 ARRAY A0 DECODER R L 2 STORE AND 1 GND RECALL CONTROL SIMPLE BLOCK DIAGRAM CIRCUITRY 0 R A1 L SLAVE R ADDRESS W A0 DECODE DETAILED BLOCK DIAGRAM Pin Descriptions PIN NUMBER SYMBOL DESCRIPTION 2 1 SDA Data I/O for I C serial interface it has an open drain output and may be wire-ord with other open drain active low outputs 2 GND Ground 3 VCC Positive logic supply voltage 2 4 A1 Address select pin used to set the slave address for the I C serial interface 2 5 A0 Address select pin used to set the slave address for the I C serial interface 6R A fixed terminal for one end of the potentiometer resistor H 7R The wiper terminal, which is equivalent to the movable terminal of a potentiometer W 8R A fixed terminal for one end of the potentiometer resistor L 9 V+ Positive bias voltage for the potentiometer wiper control 2 10 SCL Clock input for the I C serial interface FN8084 Rev 2.00 Page 2 of 12 August 13, 2015