X9511WS

APPLICATION NOTES A V A I L A B L E AN99 • AN115 • AN120 • AN124 • AN133 • AN134 • AN135 Terminal Voltage ±5V, 32 Taps X9511 Single Digitally-Controlled (XDCP™) Potentiometer (Push Button Controlled) FEATURES DESCRIPTION • Push button controlled • Low power CMOS —Active current, 3mA max —Standby current, 200µA max • 31 resistive elements —Temperature compensated — ±20% end to end resistance range —–5V to +5V range • 32 wiper tap points —Wiper positioned via two push button inputs —Slow & fast scan modes —AUTOSTORE® option —Manual store option —Wiper position stored in nonvolatile memory and recalled on power-up • 100 year wiper position data retention • X9511W = 10KΩ • Packages —8-lead PDIP —8-lead SOIC The Xicor X9511 is a push button controlled potentiometer that is ideal for push button controlled resistance trimming. The X9511 is a resistor array composed of 31 resistive elements. Between each element and at either end are tap points accessible to the wiper element. The position of the wiper element is controlled by the PU and PD inputs. The position of the wiper can be automatically stored in E2 memory and then be recalled upon a subsequent power-on operation. The resolution of the X9511 is equal to the maximum resistance value divided by 31. As an example, for the X9511W (10KΩ) each tap point represents 323Ω. All Xicor nonvolatile products are designed and tested for applications requiring extended endurance and data retention. BLOCK DIAGRAM PU PD 5-Bit Up/Down Counter VH 31 30 29 5-Bit EEPROM Memory 28 One of Thirty-Two Decoder Transfer Gates Resistor Array 2 ASE Store and Recall Control Circuitry 1 0 VL VW AUTOSTORE is a registered trademark of Xicor, Inc. REV 1.2 2/13/04 www.xicor.com Characteristics subject to change without notice. 1 of 10 X9511 PIN DESCRIPTIONS PIN NAMES VH/RH and VL/RL The high (VH/RH) and low (VL/RL) terminals of the X9511 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is –5V and the maximum is +5V. It should be noted that the terminology of VL/RL and VH/RH reference the relative position of the terminal in relation to wiper movement direction selected by the PU and PD inputs, and not the voltage potential on the terminal. Symbol PU The debounced PU input is for incrementing the wiper position. An on-chip pull-up holds the PU input HIGH. A switch closure to ground or a LOW logic level will, after a debounce time, move the wiper to the next adjacent higher tap position. ASE PD The debounced PD input is for decrementing the wiper position. An on-chip pull-up holds the PD input HIGH. A switch closure to ground or a LOW logic level will, after a debounce time, move the wiper to the next adjacent lower tap position. ASE The debounced ASE (AUTOSTORE enable) pin can be in one of two states: VIL—AUTOSTORE is enabled. When VCC powers down, an automatic store cycle takes place. VIH—AUTOSTORE is disabled. A LOW to HIGH will initiate a manual store operation. This is for the user who wishes to connect a push button switch to this pin. For every valid push, the X9511 will store the current wiper position to the EEPROM. PIN CONFIGURATION DIP/SOIC PU 1 PD 2 VH 3 VSS 4 REV 1.2 2/13/04 X9511 8 VCC 7 ASE 6 VL 5 VW Description VH/RH High Terminal VW/RW Wiper Terminal VL/RL Low Terminal VSS Ground VCC Supply Voltage PU Push Up Input PD Push Down Input AUTOSTORE Enable Input DEVICE OPERATION There are three sections of the X9511: the input control, counter and decode section; the EEPROM 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 EEPROM 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 potential at that point to the wiper. The X9511 is designed to interface directly to two push button switches for effectively moving the wiper up or down. The PU and PD inputs increment or decrement a 5-bit counter respectively. The output of this counter is decoded to select one of the thirty-two wiper positions along the resistive array. The wiper increment input, PU and the wiper decrement input, PD are both connected to an internal pull-up so that they normally remain HIGH. When pulled LOW by an external push button switch or a logic LOW level input, the wiper will be switched to the next adjacent tap position. Internal debounce circuitry prevents inadvertent switching of the wiper position if PU or PD remain LOW for less than 40ms, typical. Each of the buttons can be pushed either once for a single increment/decrement or continuously for a multiple increments/decrements. The number of increments/decrements of the wiper position depend on how long the button is being pushed. When making a continuous push, after the first second, the increment/decrement speed increases. For the first second the device will be in the slow scan mode. Then if the button is held for longer than 1 second the device will go into the fast scan mode. As soon as the button is released the X9511 will return to a standby condition. www.xicor.com Characteristics subject to change without notice. 2 of 10 X9511 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. Manual (Push Button) Store When ASE is not enabled (held HIGH) a push button switch may be used to pull ASE LOW and released to perform a manual store of the wiper position. AUTOSTORE The value of the counter is stored in EEPROM memory whenever the chip senses a power-down of VCC while ASE is enabled (held LOW). When power is restored, the content of the memory is recalled and the counter reset to the last value stored. RTOTAL with VCC Removed The end to end resistance of the array will fluctuate once VCC is removed. If AUTOSTORE is to be implemented, ASE is typically hard wired to VSS. If ASE is held HIGH during powerup and then taken LOW, the wiper will not respond to the PU or PD inputs until ASE is brought HIGH and held HIGH. Figure 1. Typical circuit with ASE store pin controlled by push button switch Figure 2. Typical circuit with ASE store pin used in AUTOSTORE mode VCC VCC 3.3µF 2KΩ REV 1.2 2/13/04 8 1 2 7 VCC VH PU PD ASE VW VL VSS 3 5 8 1 6 2 7 www.xicor.com VCC VSS PU PD ASE VH VW VL 4 3 5 6 Characteristics subject to change without notice. 3 of 10 X9511 ABSOLUTE MAXIMUM RATINGS Temperature under bias ....................–65°C to +135°C Storage temperature .........................–65°C to +150°C Voltage on PU, PD, and VCC with respect to VSS.................................. –1V to +7V Voltage on VH and VL referenced to VSS.................................... –8V to +8V ∆V = |VH–VL| X9511W ............................................................. 10V Lead temperature (soldering 10 seconds)..........300°C Wiper current ............................................................±1mA ANALOG CHARACTERISTICS Electrical Characteristics End-to-end resistance tolerance .......................... ±20% Power rating at 25°C X9511W ......................................................... 10mW Wiper current ................................................. ±1mA Max. Typical wiper resistance ...........................40Ω at 1mA Typical noise ............................ < –120dB/√Hz Ref: 1V Resolution Resistance ............................................................ 3% COMMENT Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only; 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. Temperature Coefficient –40°C to +85°C X9511W ...................................... +300 ppm/°C Typical Ratiometric temperature coefficient ................±20 ppm Wiper Adjustability Unlimited wiper adjustment....... (Non-Store operation) Wiper position store operations.......................100,000 data changes Physical Characteristics Marking Includes Manufacturer’s Trademark Resistance Value or Code Date Code Linearity Absolute linearity(1) ............................................±1.0 Ml(2) Relative linearity(3) .............................................±0.2 Ml(2) Notes: (1) Absolute linearity is utilized to determine actual wiper voltage versus expected voltage = (Vw(n)(actual)–Vw(n)(expected)) = ±1 Ml Maximum. (2) 1 Ml = Minimum Increment = RTOT/31. (3) Relative linearity is a measure of the error in step size between taps = VW(n+1)– [Vw(n) + Ml] = +0.2 Ml SYMBOL TABLE WAVEFORM REV 1.2 2/13/04 INPUTS OUTPUTS Must be steady Will be steady May change from Low to High Will change from Low to High May change from High to Low Will change from High to Low Don’t Care: Changes Allowed N/A Changing: State Not Known Center Line is High Impedance www.xicor.com Characteristics subject to change without notice. 4 of 10 X9511 RECOMMENDED OPERATING CONDITIONS Temperature Min. Max. Supply Voltage Limits Commercial 0°C +70°C X9511 5V ±10% Industrial –40°C +85°C D.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified.) Limits Symbol Parameter Min. Typ.(4) Max. Unit Test Conditions 1 3 mA PU or PD held at VIL the other at VIH 100 200 µA PU = PD = VIH 10 µA VIN = VSS to VCC ICC VCC active current ISB Standby supply current ILI PU, PD, ASE input leakage current VIH PU, PD, ASE input HIGH voltage 2 VCC + 1 V VlL PU, PD, ASE input LOW voltage –1 0.8 V RW Wiper resistance 100 Ω VVH VH terminal voltage –5 +5 V VVL VL terminal voltage –5 +5 V 10 pF (5) 40 ASE, PU, PD input capacitance CIN Max. Wiper Current ±1mA VCC = 5V, VIN = 0V, TA = 25°C, f = 1MHz Notes: (4) Typical values are for TA = 25°C and nominal supply voltage. (5) This parameter is periodically sampled and not 100% tested. A.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified.) Limits Symbol tGAP Parameter Time between two separate push button events tDB Min. (7) tS FAST (7) (7) tR VCC (7) Unit µs 30 60 ms After debounce to wiper change on a slow mode 100 250 375 ms Wiper change on a fast mode 25 50 75 ms 500 µs 50 mV/µs Power up to wiper stable tPU Max. 0 Debounce time tS SLOW Typ.(6) VCC power-up rate 0.2 tASTO AUTOSTORE cycle time VASTH(7) AUTOSTORE threshold voltage 4 V AUTOSTORE cycle end voltage 3.5 V (7) VASEND 2 ms POWER UP AND DOWN REQUIREMENTS The are no restrictions on the sequencing of VCC and the voltage applied to the potentiometer pins during power-up or power-down conditions. During power-up, the data sheet parameters for the DCP do not fully apply until 1ms after VCC reaches its final value. The VCC ramp rate spec is always in effect. REV 1.2 2/13/04 www.xicor.com Characteristics subject to change without notice. 5 of 10 X9511 AUTOSTORE Cycle Timing Diagram VCC 5 VASTH Volts (V) Autos Cycle in Progress VASEND tASTO Store Time Time (ms) Notes: VASTH—AUTOSTORE threshold voltage VASEND—AUTOSTORE cycle end voltage tASTO—AUTOSTORE cycle time (6) Typical values are for TA = 25°C and nominal supply voltage. (7) This parameter is periodically sampled and not 100% tested. Slow Mode Timing tDB tGAP PU MI(1) VW Note: (1) MI in the A.C. timing diagram refers to the minimum incremental change in the wiper voltage. REV 1.2 2/13/04 www.xicor.com Characteristics subject to change without notice. 6 of 10 X9511 Fast Mode Timing tDB PU tS FAST tS SLOW VW MI(1) 1 Second Note: (1) MI in the A.C. timing diagram refers to the minimum incremental change in the wiper voltage. REV 1.2 2/13/04 www.xicor.com Characteristics subject to change without notice. 7 of 10 X9511 PACKAGING INFORMATION 8-Lead Plastic Dual In-Line Package Type P 0.430 (10.92) 0.360 (9.14) 0.260 (6.60) 0.240 (6.10) Pin 1 Index Pin 1 0.300 (7.62) Ref. Half Shoulder Width On All End Pins Optional 0.145 (3.68) 0.128 (3.25) Seating Plane 0.025 (0.64) 0.015 (0.38) 0.065 (1.65) 0.045 (1.14) 0.150 (3.81) 0.125 (3.18) 0.110 (2.79) 0.090 (2.29) .073 (1.84) Max. 0.060 (1.52) 0.020 (0.51) 0.020 (0.51) 0.016 (0.41) 0.325 (8.25) 0.300 (7.62) 0° 15° Typ. 0.010 (0.25) NOTE: 1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH REV 1.2 2/13/04 www.xicor.com Characteristics subject to change without notice. 8 of 10 X9511 PACKAGING INFORMATION 8-Lead Plastic Small Outline Gull Wing Package Type S 0.150 (3.80) 0.228 (5.80) 0.158 (4.00) 0.244 (6.20) Pin 1 Index Pin 1 0.014 (0.35) 0.019 (0.49) 0.188 (4.78) 0.197 (5.00) (4X) 7° 0.053 (1.35) 0.069 (1.75) 0.004 (0.19) 0.010 (0.25) 0.050 (1.27) 0.010 (0.25) X 45° 0.020 (0.50) 0.050"Typical 0.050" Typical 0° - 8° 0.0075 (0.19) 0.010 (0.25) 0.250" 0.016 (0.410) 0.037 (0.937) 0.030" Typical 8 Places FOOTPRINT NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) REV 1.2 2/13/04 www.xicor.com Characteristics subject to change without notice. 9 of 10 X9511 ORDERING INFORMATION X9511X X X Temperature Range Blank = Commercial = 0°C to +70°C I = Industrial = –40°C to +85°C Package P = 8-Lead Plastic DIP S = 8-Lead SOIC End to End Resistance W = 10KΩ LIMITED WARRANTY ©Xicor, Inc. 2000 Patents Pending Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. Xicor, Inc. makes no warranty of merchantability or fitness for any purpose. Xicor, Inc. reserves the right to discontinue production and change specifications and prices at any time and without notice. Xicor, Inc. assumes no responsibility for the use of any circuitry other than circuitry embodied in a Xicor, Inc. product. No other circuits, patents, or licenses are implied. TRADEMARK DISCLAIMER: Xicor and the Xicor logo are registered trademarks of Xicor, Inc. AutoStore, Direct Write, Block Lock, SerialFlash, MPS, and XDCP are also trademarks of Xicor, Inc. All others belong to their respective owners. U.S. PATENTS Xicor products are covered by one or more of the following U.S. Patents: 4,326,134; 4,393,481; 4,404,475; 4,450,402; 4,486,769; 4,488,060; 4,520,461; 4,533,846; 4,599,706; 4,617,652; 4,668,932; 4,752,912; 4,829,482; 4,874,967; 4,883,976; 4,980,859; 5,012,132; 5,003,197; 5,023,694; 5,084,667; 5,153,880; 5,153,691; 5,161,137; 5,219,774; 5,270,927; 5,324,676; 5,434,396; 5,544,103; 5,587,573; 5,835,409; 5,977,585. Foreign patents and additional patents pending. LIFE RELATED POLICY In situations where semiconductor component failure may endanger life, system designers using this product should design the system with appropriate error detection and correction, redundancy and back-up features to prevent such an occurrence. Xicor’s products are not authorized for use in critical components in life support devices or systems. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. REV 1.2 2/13/04 www.xicor.com Characteristics subject to change without notice. 10 of 10