rev 1.1.1 2/7/02 characteristics subject to change without notice. 1 of 10 www.xicor.com single digitally-controlled (xdcp ) potentiometer (push button controlled) features push button controlled low power cmos active current, 3ma max standby current, 200? max 31 resistive elements temperature compensated 20% end to end resistance range ?v 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 = 10k ? packages 8-lead pdip 8-lead soic description the xicor X9511 is a push button controlled potentiom- eter 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 e 2 memory and then be recalled upon a sub- sequent power-on operation. the resolution of the X9511 is equal to the maximum resistance value divided by 31. as an example, for the X9511w (10k ? ) each tap point represents 323 ? . all xicor nonvolatile products are designed and tested for applications requiring extended endurance and data retention. block diagram 5-bit up/down counter 5-bit eeprom memory store and recall control circuitry one of thirty-two decoder resistor array v h pu transfer gates ase v l v w 0 1 2 28 29 30 31 pd X9511 autostore is a registered trademark of xicor, inc. a pplication n otes available an99 ?an115 ?an120 ?an124 ?an133 ?an134 ?an135 terminal voltage ?v, 32 taps
X9511 characteristics subject to change without notice. 2 of 10 rev 1.1.1 2/7/02 www.xicor.com pin descriptions v h /r h and v l /r l the high (v h /r h ) and low (v l /r l ) terminals of the X9511 are equivalent to the ?ed terminals of a mechanical potentiometer. the minimum voltage is ?v and the maximum is +5v. it should be noted that the terminology of v l /r l and v h /r h 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. 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. 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: v il ?utostore is enabled. when v cc powers down, an automatic store cycle takes place. v ih ?utostore is disabled. a low to high will ini- tiate 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 pin names 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 trans- fers 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 switch- ing 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 ?st second, the increment/decrement speed increases. for the ?st 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. v h v cc pu pd 1 2 3 4 8 7 6 5 X9511 dip/soic v ss ase v l v w symbol description v h /r h high terminal v w /r w wiper terminal v l /r l low terminal v ss ground v cc supply voltage pu push up input pd push down input ase autostore enable input
X9511 characteristics subject to change without notice. 3 of 10 rev 1.1.1 2/7/02 www.xicor.com the wiper, when at either ?ed 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. autostore the value of the counter is stored in eeprom memory whenever the chip senses a power-down of v cc 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. if autostore is to be implemented, ase is typically hard wired to v ss . if ase is held high during power- up and then taken low, the wiper will not respond to the pu or pd inputs until ase is brought high and held high. 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. r total with v cc removed the end to end resistance of the array will ?ctuate once v cc is removed. 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 3 5 6 8 1 2 7 v cc 2k ? v cc pu pd ase v h v w v l v ss 4 3 5 8 1 2 7 v cc v cc pu pd ase v ss v h v w v l 3.3? 6
X9511 characteristics subject to change without notice. 4 of 10 rev 1.1.1 2/7/02 www.xicor.com absolute maximum ratings temperature under bias ....................?5 c to +135 c storage temperature .........................?5 c to +150 c voltage on pu , pd , and v cc with respect to v ss .................................. ?v to +7v voltage on v h and v l referenced to v ss .................................... ?v to +8v ? v = |v h ? l | 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 ...........................40 ? at 1ma typical noise ............................ < ?20db/ hz ref: 1v resolution resistance ............................................................ 3% linearity absolute linearity (1) ............................................ 1.0 ml (2) relative linearity (3) ............................................. 0.2 ml (2) comment stresses above those listed under ?bsolute 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 speci?ation) is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reli- ability. temperature coefficient ?0 c to +85 c X9511w ...................................... +300 ppm/ c typical ratiometric temperature coef?ient ................ 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 notes: (1) absolute linearity is utilized to determine actual wiper voltage versus expected voltage = (v w(n) (actual)? w(n) (expected)) = 1 ml maximum. (2) 1 ml = minimum increment = r tot /31. (3) relative linearity is a measure of the error in step size between taps = v w(n+1) ?[v w(n) + ml] = +0.2 ml symbol table waveform 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? care: changes allowed changing: state not known n/a center line is high impedance
X9511 characteristics subject to change without notice. 5 of 10 rev 1.1.1 2/7/02 www.xicor.com recommended operating conditions temperature min. max. commercial 0 c +70 c industrial ?0 c +85 c supply voltage limits X9511 5v 10% d.c. operating characteristics (over recommended operating conditions unless otherwise speci?d.) standard parts notes: (4) typical values are for t a = 25? and nominal supply voltage. (5) this parameter is periodically sampled and not 100% tested. a.c. operating characteristics (over recommended operating conditions unless otherwise speci?d.) power up and down requirements the are no restrictions on the sequencing of v cc 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 v cc reaches its ?al value. the v cc ramp rate spec is always in effect. symbol parameter limits unit test conditions min. typ. (4) max. i cc v cc active current 1 3 ma pu or pd held at v il the other at v ih i sb standby supply current 100 200 ? pu = pd = v ih i li pu , pd , ase input leakage current 10 a v in = v ss to v cc v ih pu , pd , ase input high voltage 2 v cc + 1 v v ll pu , pd , ase input low voltage ? 0.8 v r w wiper resistance 40 100 ? max. wiper current 1ma v vh vh terminal voltage ? +5 v v vl vl terminal voltage ? +5 v c in (5) ase , pu , pd input capacitance 10 pf v cc = 5v, v in = 0v, t a = 25 c, f = 1mhz part number maximum resistance wiper increments minimum resistance X9511w 10kw 323 ? 40 ? symbol parameter limits unit min. typ. (6) max. t gap time between two separate push button events 0 ? t db debounce time 30 60 ms t s slow after debounce to wiper change on a slow mode 100 250 375 ms t s fast (7) wiper change on a fast mode 25 50 75 ms t pu (7) power up to wiper stable 500 ? t r v cc (7) v cc power-up rate 0.2 50 mv/ ? t asto (7) autostore cycle time 2 ms v asth (7) autostore threshold voltage 4 v v asend (7) autostore cycle end voltage 3.5 v
X9511 characteristics subject to change without notice. 6 of 10 rev 1.1.1 2/7/02 www.xicor.com autostore cycle timing diagram notes: v asth ?utostore threshold voltage v asend ?utostore cycle end voltage t asto ?utostore cycle time (6) typical values are for t a = 25? and nominal supply voltage. (7) this parameter is periodically sampled and not 100% tested. slow mode timing note: (1) mi in the a.c. timing diagram refers to the minimum incremental change in the wiper voltage. v asth v cc v asend t asto store time autos cycle in progress volts (v) time (ms) 5 t gap t db mi (1) v w pu
X9511 characteristics subject to change without notice. 7 of 10 rev 1.1.1 2/7/02 www.xicor.com fast mode timing note: (1) mi in the a.c. timing diagram refers to the minimum incremental change in the wiper voltage. t db pu t s slow t s fast mi (1) 1 second v w
X9511 characteristics subject to change without notice. 8 of 10 rev 1.1.1 2/7/02 www.xicor.com packaging information note: 1. all dimensions in inches (in parentheses in millimeters) 2. package dimensions exclude molding flash 0.020 (0.51) 0.016 (0.41) 0.150 (3.81) 0.125 (3.18) 0.110 (2.79) 0.090 (2.29) 0.430 (10.92) 0.360 (9.14) 0.300 (7.62) ref. pin 1 index 0.145 (3.68) 0.128 (3.25) 0.025 (0.64) 0.015 (0.38) pin 1 seating 0.065 (1.65) 0.045 (1.14) 0.260 (6.60) 0.240 (6.10) 0.060 (1.52) 0.020 (0.51) typ. 0.010 (0.25) 0 15 8-lead plastic dual in-line package type p half shoulder width on all end pins optional .073 (1.84) max. 0.325 (8.25) 0.300 (7.62) plane
X9511 characteristics subject to change without notice. 9 of 10 rev 1.1.1 2/7/02 www.xicor.com packaging information 0.150 (3.80) 0.158 (4.00) 0.228 (5.80) 0.244 (6.20) 0.014 (0.35) 0.019 (0.49) pin 1 pin 1 index 0.010 (0.25) 0.020 (0.50) 0.050 (1.27) 0.188 (4.78) 0.197 (5.00) 0.004 (0.19) 0.010 (0.25) 0.053 (1.35) 0.069 (1.75) (4x) 7 0.016 (0.410) 0.037 (0.937) 0.0075 (0.19) 0.010 (0.25) 0?- 8 x 45 8-lead plastic small outline gull wing package type s note: all dimensions in inches (in parentheses in millimeters) 0.250" 0.050"typical 0.050" typical 0.030" typical 8 places footprint
X9511 characteristics subject to change without notice. 10 of 10 limited warranty devices sold by xicor, inc. are covered by the warranty and patent indemni?ation provisions appearing in its terms of sale onl y. xicor, inc. makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the descr ibed devices from patent infringement. xicor, inc. makes no warranty of merchantability or ?ness for any purpose. xicor, inc. reserves the right to discontinue produ ction and change speci?ations 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 o ther 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 xd cp 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 addition al patents pending. life related policy in situations where semiconductor component failure may endanger life, system designers using this product should design the sy stem 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) sup port 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 res ult in a signi?ant 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. ?icor, inc. 2000 patents pending rev 1.1.1 2/7/02 www.xicor.com ordering information X9511x x x temperature range blank = commercial = 0? to +70? i = industrial = ?0? to +85? package p = 8-lead plastic dip s = 8-lead soic end to end resistance w = 10k ?
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