DATASHEET X93256 FN8188 Rev 2.00 Dual Digitally Controlled Potentiometers (XDCPs) February 1, 2008 The Intersil X93256 is a dual digitally controlled Features potentiometer (XDCP). The device consists of two resistor Dual solid-state potentiometers arrays, wiper switches, a control section, and nonvolatile memory. The wiper positions are controlled by individual Individual Up/Down interfaces Up/Down interfaces. 32 wiper tap points per potentiometer A potentiometer is implemented by a resistor array - Wiper position stored in nonvolatile memory and composed of 31 resistive elements and a wiper switching recalled on power-up network. The position of each wiper element is controlled by 31 resistive elements per potentiometer a set of independent CS, U/D, and INC inputs. The position - Temperature compensated of the wiper can be stored in nonvolatile memory and then - Maximum resistance tolerance of 25% be recalled upon a subsequent power-up operation. - Terminal voltage, 0 to V CC Each potentiometer is connected as a three-terminal Low power CMOS variable resistor and can be used in a wide variety of -V = 2.7V to 5.5V. CC applications including: - Active current, 200A typical per potentiometer Bias and Gain Control - Standby current, 4A max per potentiometer LCD Contrast Adjustment High reliability - Endurance 200,000 data changes per bit Pinout - Register data retention, 100 years X93256 (14 LD TSSOP) R value = 12.5k , 50k TOTAL TOP VIEW Package Rw1 R - 14 Ld TSSOP 14 H1 1 R L1 U/D Pb-free available (RoHS compliant) 2 13 1 CS INC 12 1 3 1 INC V CC 2 4 11 U/D 5 10 2 CS 2 R 9 R 6 L2 H2 7 8 V Rw2 SS *NC can be left unconnected, or connected to any voltage between V and V . SS CC Ordering Information TEMPERATURE PKG. PART NUMBER PART MARKING V LIMITS (V) R (k ) RANGE (C) PACKAGE DWG. CC TOTAL X93256UV14I-2.7* X9325 6UVG 2.7 to 5.5 50 -40 to +85 14 Ld TSSOP (4.4mm) M14.173 X93256UV14IZ-2.7* X9325 6UZG 50 -40 to +85 14 Ld TSSOP (4.4mm) (Pb-free) M14.173 (Note) X93256WV14I-2.7* X9325 6WVG 12.5 -40 to +85 14 Ld TSSOP (4.4mm) M14.173 X93256WV14IZ-2.7* X9325 6WZG 12.5 -40 to +85 14 Ld TSSOP (4.4mm) (Pb-free) M14.173 (Note) *AddT1 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. FN8188 Rev 2.00 Page 1 of 7 February 1, 2008X93256 Block Diagram DETAILED SINGLE POTENTIOMETER DESCRIPTION GENERAL DESCRIPTION U/D 1 V (SUPPLY VOLTAGE) CC 5-BIT R 31 H1 INC UP/DOWN 1 R COUNTER H1 30 CS 1 30k 29 R W1 5-BIT 28 UP/DOWN NONVOLATILE ONE R MEMORY OF W (U/D AND U/D ) 1 2 R L1 TRANSFER THIRTY RESISTOR CONTROL INCREMENT GATES ARRAY TWO AND STORE AND R DECODER (INC AND INC ) MEMORY H2 1 2 CONTROL DEVICE SELECT RECALL 2 CIRCUITRY (CS AND CS ) 1 2 R 1 W2 V CC 0 R V SS L2 R L1 V (GROUND) SS Pin Descriptions TSSOP SYMBOL BRIEF DESCRIPTION 1R R . The R pin of the X93256 is the wiper terminal of the first potentiometer, which is equivalent to the movable W1 W1 W1 terminal of a mechanical potentiometer. 2R R . The R and R pins of the X93256 are equivalent to the fixed terminals of a mechanical potentiometer. The L1 L1 H1 L1 minimum voltage is V and the maximum is V . The terminology of R and R references the relative position of SS CC H1 L1 the terminal in relation to wiper movement direction selected by the U/D input. 3CS Chip Select 1 (CS ). The first potentiometer is selected when the CS input is LOW. The current counter value is stored 1 1 1 in nonvolatile memory when CS is returned HIGH while the INC input is also HIGH. After the store operation is 1 1 complete, the first potentiometer of the X93256 will be placed in the low power standby mode until the first potentiometer is selected once again. 4INC Increment 2 (INC ). The INC input is negative-edge triggered. Toggling INC will move the wiper of the second 2 2 2 2 potentiometer and either increment or decrement the counter in the direction indicated by the logic level on the U/D 2 input. 5U/D Up/Down 2 (U/D ). The U/D input controls the direction of the second potentiometer wiper movement and whether the 2 2 2 counter for the second potentiometer is incremented or decremented. 6R R . The R and R pins of the X93256 are equivalent to the fixed terminals of a mechanical potentiometer. The H2 H2 H2 L2 minimum voltage is V and the maximum is V . The terminology of R and R references the relative position of SS CC H2 L2 the wiper terminal for the second potentiometer in relation to the wiper movement direction selected by the U/D input. 2 7V Ground. SS 8R R . The R pin of the X93256 is the wiper terminal of the second potentiometer, which is equivalent to the movable W2 W2 W2 terminal of a mechanical potentiometer. 9R R . The R and R pins of the X93256 are equivalent to the fixed terminals of a mechanical potentiometer. The L2 L2 H2 L2 minimum voltage is V and the maximum is V . The terminology of R and R references the relative position of SS CC H2 L2 the wiper terminal for the second potentiometer in relation to the wiper movement direction selected by the U/D input. 2 10 CS Chip Select 2 (CS ). The second potentiometer is selected when the CS input is LOW. The current counter value is 2 2 2 stored in nonvolatile memory when CS is returned HIGH while the INC input is also HIGH. After the store operation is 2 2 complete, the second potentiometer of the X93256 will be placed in the low power standby mode until the second potentiometer is selected once again. 11 V Supply Voltage. CC 12 INC Increment 1(INC ). The INC input is negative-edge triggered. Toggling INC will move the wiper of the first 1 1 1 1 potentiometer and either increment or decrement the counter in the direction indicated by the logic level on the U/D 1 input. 13 U/D Up/Down 1 (U/D ). The U/D input controls the direction of the first potentiometer wiper movement and whether the 1 1 1 counter for the first potentiometer is incremented or decremented. 14 R R . The R and R pins of the X93256 are equivalent to the fixed terminals of a mechanical potentiometer. The H1 H1 H1 L1 minimum voltage is V and the maximum is V . The terminology of R and R references the relative position of SS CC H1 L1 the wiper terminal for the first potentiometer in relation to the wiper movement direction selected by the U/D input. 1 FN8188 Rev 2.00 Page 2 of 7 February 1, 2008