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X93156
Data Sheet September 16, 2005 FN8182.2
Digitally Controlled Potentiometer (XDCPTM)
The Intersil X93156 is a three-terminal digitally controlled potentiometer (XDCP). The device consists of a resistor array, wiper switches, a control section, and nonvolatile memory. The wiper position is controlled by an Up/Down interface. The potentiometer is implemented by a resistor array composed of 31 resistive elements and a wiper switching network. The position of the wiper element is controlled by the 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. The device can be used as a three-terminal potentiometer or as a two terminal variable resistor in a wide variety of applications including the programming of bias voltages, LCD brightness and contrast control as well as the implementation of ladder networks.
Features
* Solid-state potentiometer * Up/Down interface * 32 wiper tap points - Wiper position stored in nonvolatile memory and recalled on power-up * 31 resistive elements - Temperature compensated - Maximum resistance tolerance of 25% - Terminal voltage, 0 to VCC * Low power CMOS - VCC = 2.7 V - 5.5 V - Active current, 200A typ. - Standby current, 2A max. * High reliability - Endurance 200,000 data changes per bit - Register data retention, 100 years * RTOTAL value = 12.5k, 50k * Packages - 8 Ld MSOP, TDFN - Pb-free plus anneal available (RoHS compliant)
Pinouts
X93156 (8 LD MSOP) TOP VIEW
1 2 3
X93156 (8 LD TDFN) TOP VIEW
8 7 X93156 6 5 VCC CS RL Rw
INC U/D RH VSS
1 2 X93156 3 4
8 7 6 5
INC VCC CS RL Rw U/D RH VSS
4
**Contact factory for TDFN ordering info.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
X93156 Ordering Information
PART NUMBER X93156WM8I X93156WM8IZ (See Note) X93156WM8I-2.7* X93156WM8IZ-2.7* (See Note) X93156UM8I-2.7* X93156UM8IZ-2.7* (See Note) (AGP) 50 (AGR) PART MARKING RTOTAL (k) 12.5 TEMP RANGE (C) -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 PACKAGE 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld MSOP 8 Ld MSOP (Pb-free) 8 Ld MSOP 8 Ld MSOP (Pb-free) PKG. DWG. # M8.118 M8.118 M8.118 M8.118 M8.118 M8.118
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are 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. *Add "T1" suffix for tape and reel.
Block Diagram
VCC (Supply Voltage) U/D INC CS 5-Bit Up/Down Counter 31 30 29 5-Bit Nonvolatile Memory 28 One of Thirty Two Decoder 2 1 VCC VSS (Ground) VSS General Detailed RL 0 RH
30K
Up/Down (U/D) Increment (INC) Device Select (CS) Control and Memory
RH
RW
RL
Store and Control Recall Circuitry
Transfer Gates
Resistor Array
RW
Pin Descriptions
MSOP, TDFN SYMBOL 1 2 3 INC U/D RH BRIEF DESCRIPTION Increment (INC). The INC input is negative-edge triggered. Toggling INC will move the wiper and either increment or decrement the counter in the direction indicated by the logic level on the U/D input. Up/Down (U/D). The U/D input controls the direction of the wiper movement and whether the counter is incremented or decremented. RH. The RH and RL pins of the X93156 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is VSS and the maximum is VCC. The terminology of RH and RL references the relative position of the terminal in relation to wiper movement direction selected by the U/D input. Ground. RW. The Rw pin of the X93156 is the wiper terminal of the potentiometer which is equivalent to the movable terminal of a mechanical potentiometer. RL. The RH and RL pins of the X93156 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is VSS and the maximum is VCC. The terminology of RH and RL references the relative position of the terminal in relation to wiper movement direction selected by the U/D input. Chip Select (CS). The device is selected when the CS input is LOW. The current counter value is stored in nonvolatile memory when CS is returned HIGH while the INC input is also HIGH. After the store operation is complete, the X93156 will be placed in the low power standby mode until the device is selected once again. Supply Voltage.
4 5 6
VSS Rw RL
7
CS
8
VCC
2
FN8182.2 September 16, 2005
X93156
Absolute Maximum Ratings
Temperature under bias . . . . . . . . . . . . . . . . . . . . . .-65C to +135C Storage temperature . . . . . . . . . . . . . . . . . . . . . . . .-65C to +150C Voltage on CS, INC, U/D, RH, RL and VCC with respect to VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . -1V to +6.5V Lead temperature (soldering 10s) . . . . . . . . . . . . . . . . . . . . . . 300C Maximum reflow temperature (40s) . . . . . . . . . . . . . . . . . . . . . 240C Maximum resistor current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2mA
Thermal Information
Thermal Resistance (Typical, Note 1) 8 Ld MSOP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . JA (C/W) 190
Recommended Operating Conditions
Temperature Range Industrial. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40C to +85C Supply Voltage VCC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V (Note 8)
CAUTION: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only; the functional operation of the device (at these or any other conditions above those listed in the operational sections of this specification) is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
NOTE: 1. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Potentiometer Specifications Over recommended operating conditions unless otherwise stated.
SYMBOL RTOT PARAMETER End to end resistance TEST CONDITIONS/NOTES MIN 9.375 37.5 VR RH, RL terminal voltages Power rating Noise RW IW Wiper Resistance Wiper Current Resolution Absolute linearity (Note 2) Relative linearity (Note 3) RTOTAL temperature coefficient CH/CL/CW NOTES: 2. Absolute linearity is utilized to determine actual wiper voltage versus expected voltage = (VH(n)(actual)-VH(n)(expected)) = 1 Ml Maximum. n = 1 .. 29 only 3. Relative linearity is a measure of the error in step size between taps = VH(n+1)--[VH(n) + Ml] = 0.5 Ml, n = 1 .. 29 only. 4. 1 Ml = Minimum Increment = RTOT/31. 5. Typical values are for TA = 25C and nominal supply voltage. 6. This parameter is periodically sampled and not 100% tested 7. This parameter is not 100% tested. 8. When performing multiple write operations, VCC must not decrease by more than 150mV from it's initial value. Potentiometer capacitances VH(n)(actual)-VH(n)(expected) VH(n+1)-[VH(n)+MI] (Note 7) See circuit #2 35 10/10/25 (Note 6) 3 1 0.5 Ref: 1kHz -120 1100 0.6 0 TYP 12.5 50 MAX 15.625 62.5 VCC 1 UNIT k k V mW (Note 7) dBV (Note 7) mA % MI (Note 4) MI (Note 4) ppm/C pF (Note 7)
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FN8182.2 September 16, 2005
X93156
DC Electrical Specifications
SYMBOL ICC1 PARAMETER VCC active current (Increment) Over recommended operating conditions unless otherwise specified. TEST CONDITIONS CS = VIL, U/D = VIL or VIH and INC = 0.4V @ max. tCYC VCC=3V CS = VIL, U/D = VIL or VIH and INC = 0.4V @ max. tCYC VCC = 5V ICC2 VCC active current (Store) (EEPROM Store) CS = VIH, U/D = VIL or VIH and INC = VIH @ max. tWR VCC = 3V CS = VIH, U/D = VIL or VIH and INC = VIH @ max. tWR VCC = 5V ISB Standby supply current CS = VCC - 0.3V, U/D and INC = VSS or VCC - 0.3V VCC = 3V CS = VCC - 0.3V, U/D and INC = VSS or VCC - 0.3V VCC = 5V ILI ILI ILI ILI VIH VIL CS input leakage current CS input leakage current CS input leakage current INC, U/D input leakage current CS, INC, U/D input HIGH voltage CS, INC, U/D input LOW voltage VCC = 3V, VIN = VSS, TA = 25C, f = 1MHz VIN = VCC VCC = 3V, CS = 0 VCC = 5V, CS = 0 VIN = VSS to VCC VCC x 0.7 -0.5 60 120 100 200 MIN TYP (Note 5) 50 200 MAX 250 300 600 1400 1 2 1 150 250 1 VCC + 0.5 VCC x 0.1 10 UNIT A A A A A A A A A A V V pF
CIN CS, INC, U/D input capacitance (Notes 7, 8)
Endurance and Data Retention
PARAMETER Minimum endurance Data retention MIN 200,000 100 UNIT Data changes per bit Years
Circuit #2 SPICE Macro Model
RTOTAL RH CH CW 25pF 10pF CL 10pF RL
Test Circuit #1
Test Point VH/RH
AC Conditions of Test
Input pulse levels Input rise and fall times Input reference levels 0V to 3V 10ns 1.5V
AC Electrical Specifications
SYMBOL tCl tlD tDI tlL tlH tlC tCPH CS to INC setup INC HIGH to U/D change U/D to INC setup INC LOW period INC HIGH period
Over recommended operating conditions unless otherwise specified. MIN 100 100 100 1 1 1 250 TYP MAX UNIT ns ns ns s s s ns
PARAMETER
INC Inactive to CS inactive CS Deselect time (NO STORE)
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FN8182.2 September 16, 2005
X93156
AC Electrical Specifications
SYMBOL tCPH tCYC tR, tF (Note 7) tR VCC (Note 7) tWR Over recommended operating conditions unless otherwise specified. (Continued) MIN 10 2 500 0.2 5 10,000 10 TYP MAX UNIT ms s s V/ms ms
PARAMETER CS Deselect time (STORE) INC cycle time INC input rise and fall time VCC power-up rate Store cycle
A.C. Timing
CS tCYC tCI INC tID tDI tF tIL tIH tIC tCPHS 90% 90% 10% tR
tCPHNS
U/D tIW RW MI (Note 4)
Power Up and Down Requirements
There are no restrictions on the power-up or power-down conditions of VCC and the voltages applied to the potentiometer pins provided that VCC is always more positive than or equal to VH and VL, i.e., VCC VH,VL. The VCC ramp rate spec is always in effect.
Up/Down (U/D)
The U/D input controls the direction of the wiper movement and whether the counter is incremented or decremented.
Increment (INC)
The INC input is negative-edge triggered. Toggling INC will move the wiper and either increment or decrement the counter in the direction indicated by the logic level on the U/D input.
Pin Descriptions
RH and RL
The RH and RL pins of the X93156 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is VSS and the maximum is VCC. The terminology of RH and RL references the relative position of the terminal in relation to wiper movement direction selected by the U/D input.
Chip Select (CS)
The device is selected when the CS input is LOW. The current counter value is stored in nonvolatile memory when CS is returned HIGH while the INC input is also HIGH. After the store operation is complete the X93156 will be placed in the low power standby mode until the device is selected once again.
Rw
The Rw pin of the X93156 is the wiper terminal of the potentiometer which is equivalent to the movable terminal of a mechanical potentiometer
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FN8182.2 September 16, 2005
X93156 Principles of Operation
There are three sections of the X93156: the input control, counter and decode section; the nonvolatile memory; and the resistor array. The input control section operates just like an up/down counter. The output of this counter is decoded to turn on a single electronic switch connecting a point on the resistor array to the wiper output. Under the proper conditions the contents of the counter can be stored in nonvolatile memory and retained for future use. The resistor array is comprised of 31 individual resistors connected in series. At either end of the array and between each resistor is an electronic switch that transfers the connection at that point to the wiper. The wiper, when at either fixed terminal, acts like its mechanical equivalent and does not move beyond the last position. That is, the counter does not wrap around when clocked to either extreme. If the wiper is moved several positions, multiple taps are connected to the wiper for tIW (INC to VW change). The 2-terminal resistance value for the device can temporarily change by a significant amount if the wiper is moved several positions. When the device is powered-down, the last wiper position stored will be maintained in the nonvolatile memory. When power is restored, the contents of the memory are recalled and the wiper is set to the value last stored. This procedure allows the system to always power-up to a preset value stored in nonvolatile memory; then during system operation minor adjustments could be made. The adjustments might be based on user preference, system parameter changes due to temperature drift, or other system trim requirements. The state of U/D may be changed while CS remains LOW. This allows the host system to enable the device and then move the wiper up and down until the proper trim is attained.
Mode Selection
CS L L H H X L L L INC U/D H L X X X H L Wiper Up Wiper Down Store Wiper Position Standby Current No Store, Return to Standby Wiper Up (not recommended) Wiper Down (not recommended) MODE
Symbol Table
WAVEFORM INPUTS Must be steady May change from Low to High May change from High to Low Don't Care: Changes Allowed N/A OUTPUTS Will be steady Will change from Low to High Will change from High to Low Changing: State Not Known Center Line is High Impedance
Instructions and Programming
The INC, U/D and CS inputs control the movement of the wiper along the resistor array. With CS set LOW the device is selected and enabled to respond to the U/D and INC inputs. HIGH to LOW transitions on INC will increment or decrement (depending on the state of the U/D input) a five bit counter. The output of this counter is decoded to select one of thirty two wiper positions along the resistive array. The value of the counter is stored in nonvolatile memory whenever CS transitions HIGH while the INC input is also HIGH. In order to avoid an accidental store during power-up, CS must go HIGH with VCC during initial power-up. When left open, the CS pin is internally pulled up to VCC by an internal 30K resistor. The system may select the X93156, move the wiper and deselect the device without having to store the latest wiper position in nonvolatile memory. After the wiper movement is performed as described above and once the new position is reached, the system must keep INC LOW while taking CS HIGH. The new wiper position will be maintained until changed by the system or until a power-up/down cycle recalled the previously stored data. In order to recall the stored position of the wiper on power-up, the CS pin must be held HIGH.
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FN8182.2 September 16, 2005
X93156 Mini Small Outline Plastic Packages (MSOP)
N
M8.118 (JEDEC MO-187AA)
8 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE
E1 E
INCHES SYMBOL MIN 0.037 0.002 0.030 0.010 0.004 0.116 0.116 MAX 0.043 0.006 0.037 0.014 0.008 0.120 0.120
MILLIMETERS MIN 0.94 0.05 0.75 0.25 0.09 2.95 2.95 MAX 1.10 0.15 0.95 0.36 0.20 3.05 3.05 NOTES 9 3 4 6 7 15o 6o Rev. 2 01/03
INDEX AREA
-B12 TOP VIEW 0.25 (0.010) GAUGE PLANE SEATING PLANE -C4X R1 R 0.20 (0.008) ABC
A A1 A2 b c D E1
4X L L1
e E L
0.026 BSC 0.187 0.016 0.199 0.028
0.65 BSC 4.75 0.40 5.05 0.70
A
A2
A1
-He D
b
0.10 (0.004) -A0.20 (0.008)
C
SEATING PLANE
L1 N R
0.037 REF 8 0.003 0.003 5o 0o 15o 6o
0.95 REF 8 0.07 0.07 5o 0o
C a C L E1
C
R1 0
SIDE VIEW
-B-
0.20 (0.008)
CD
END VIEW
NOTES: 1. These package dimensions are within allowable dimensions of JEDEC MO-187BA. 2. Dimensioning and tolerancing per ANSI Y14.5M-1994. 3. Dimension "D" does not include mold flash, protrusions or gate burrs and are measured at Datum Plane. Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side. 4. Dimension "E1" does not include interlead flash or protrusions and are measured at Datum Plane. - H - Interlead flash and protrusions shall not exceed 0.15mm (0.006 inch) per side. 5. Formed leads shall be planar with respect to one another within 0.10mm (0.004) at seating Plane. 6. "L" is the length of terminal for soldering to a substrate. 7. "N" is the number of terminal positions. 8. Terminal numbers are shown for reference only. 9. Dimension "b" does not include dambar protrusion. Allowable dambar protrusion shall be 0.08mm (0.003 inch) total in excess of "b" dimension at maximum material condition. Minimum space between protrusion and adjacent lead is 0.07mm (0.0027 inch). 10. Datums -A -H- . and - B - to be determined at Datum plane
11. Controlling dimension: MILLIMETER. Converted inch dimensions are for reference only.
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FN8182.2 September 16, 2005
X93156 Thin Dual Flat No-Lead Plastic Package (TDFN)
2X A 0.15 C A D 2X 0.15 C B
L8.2.5x2
8 LEAD THIN DUAL FLAT NO-LEAD PLASTIC PACKAGE MILLIMETERS SYMBOL A MIN 0.70 NOMINAL 0.75 0.20 REF 0.20 0.25 2.00 BSC 0.90 1.00 2.50 BSC 1.20 1.30 0.50 BSC 0.20 0.30 0.40 8 4 0.50 1.40 1.10 0.30 MAX 0.80 0.05 NOTES 5, 8 7, 8 7, 8 8 2 3 Rev. 0 8/05
NX k
E 6 INDEX AREA B
A1 A3 b D D2
// 0.10 C
TOP VIEW
E E2
A C SEATING PLANE SIDE VIEW A3
0.08 C
e k L
D2 (DATUM B) 1 2 D2/2
7
8
N Nd NOTES:
6 INDEX AREA (DATUM A)
1. Dimensioning and tolerancing conform to ASME Y14.5-1994. 2. N is the number of terminals.
E2 E2/2
3. Nd refers to the number of terminals on D. 4. All dimensions are in millimeters. Angles are in degrees. 5. Dimension b applies to the metallized terminal and is measured between 0.25mm and 0.30mm from the terminal tip.
NX L N N-1 8 e (Nd-1)Xe REF. BOTTOM VIEW (A1) NX (b) 5 SECTION "C-C" L C L NX b 5 0.10 M C AB
6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature. 7. Dimensions D2 and E2 are for the exposed pads which provide improved electrical and thermal performance. 8. Nominal dimensions are provided to assist with PCB Land Pattern Design efforts, see Intersil Technical Brief TB389.
CC e
TERMINAL TIP
FOR EVEN TERMINAL/SIDE
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 8
FN8182.2 September 16, 2005

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