X9511Z

X9511 XICOR | Alldatasheet

Document overview

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Technical content

5V, 32 Taps Ó Xicor, Inc. 1994, 1995, 1996 Patents Pending 3067-3.5 8/9/97 T2/C0/D0 NS Characteristics subject to change without notice PushPot Ô Potentiometer (Push Button Controlled)

FEATURES

• Push Button Controlled
• Low Power CMOS —Active Current, 3mA Max —Standby Current, 200 m A 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 Ò Option —Manual Store Option —Wiper Position Stored in Nonvolatile Memory and Recalled on Power-Up
• 100 Year Wiper Position Data Retention
• X9511Z = 1K W
• X9511W = 10K W
• Packages —8-Lead PDIP —8-Lead SOIC

DESCRIPTION

The Xicor X9511 is a push button controlled, potentiom- eter and 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 memory and then be recalled upon a subse- quent 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 W ) each tap point represents 323 W All Xicor nonvolatile products are designed and tested for applications requiring extended endurance and data retention. FUNCTIONAL DIAGRAM 3067 ILL F01.1 5-BIT UP/DOWN COUNTER 5-BIT EEPROM MEMORY STORE AND RECALL CONTROL CIRCUITRY ONE OF THIRTY- TWO DECODER RESISTOR ARRAY VL VW VHPU PD ASE TRANSFER GATES X9511 AUTOSTORE is a registered trademark of Xicor, Inc. E POT Ô and PushPot Ô are trademarks of Xicor, Inc. A PPLICATION N OTES AVAILABLE AN42 • AN44–48 • AN50 • AN52 • AN53 • AN73

V H and V L The high (V H ) and low (V L ) terminals of the X9511 are equivalent to the fixed terminals of a mechanical potenti- ometer. The minimum voltage is –5V and the maximum is +5V. It should be noted that the terminology of V L and V H references the relative position of the terminal in rela- tion 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 (AUT OST ORE enable) pin can be in one of two states: V IL – Autostore is enabled. When V CC powers-down an automatic store cycle takes place. V IH – AUT OST ORE is disabled. A LOW to HIGH will ini- tiate a manual store operation. This is for a 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 E PR OM. PIN CONFIGURATION PIN NAMES 3067 FRM T01.1 Symbol Description V H High Terminal V W Wiper Terminal V L Low Terminal V SS Ground V CC Supply Voltage PU Push Up Input PD Push Down Input ASE AUTOSTORE Enable Input VCC ASE VL VW 3067 ILL F02.1 PU PD VH VSS X9511 DIP/SOIC

There are three sections of the X9511: the input control, counter and decode section; the E PR OM memor y; 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 E PR OM memor y 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 continu- ously 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. 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. AUTOSTORE The value of the counter is stored in E PR OM memor y 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 AUT OST ORE 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 fluctuate once V CC is removed. Typical circuit with ASE store pin controlled by push button switch VCC PU PD ASE VH VW VL V SS

3067 ILL F05a

Typical circuit with ASE store pin used in AUTOSTORE mode VCC VCC PU PD ASE V SS VH VW VL 3.3µF 3067 ILL F05.2

ABSOLUTE MAXIMUM RATINGS* C to +135 C C to +150 C Voltage on PU , PD , and V CC with Respect to V SS Voltage on V H and V L Referenced to V SS D V = |V H L C Wiper Current 1mA ANALOG CHARACTERISTICS

Electrical Characteristics

End-to-End Resistance Tolerance 20% Power Rating at 25 C Wiper Current 1mA Max. W at 1mA Ö Hz Ref: 1V Resolution Linearity Absolute Linearity (1) 1.0 Ml (2) Relative Linearity (3) 0.2 Ml (2) *COMMENT Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and 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 condi- tions for extended periods may affect device reliability. Temperature Coefficient –40 C to +85 C C Typical C Typical Ratiometric Temperature Coefficient 20 ppm Wiper Adjustability Unlimited Wiper Adjustment(Non-Store operation) Data Changes Physical Characteristics Marking Includes Man ufacturer’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) – V w(n) (expected)) = 1 Ml Maximum. (2) 1 Ml = Minimum Increment = R TO T /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 W AVEFORM 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 Changing: State Not Known N/A Center Line is High Impedance

RECOMMENDED OPERATING CONDITIONS

3067 FRM T03

3067 FRM T04.1 Temperature Min. Max. Commercial 0 C +70 C Industrial –40 C +85 C Military –55 C +125 C Supply Voltage Limits X9511 5V 10% D.C. OPERA TING CHARA CTERISTICS (Over recommended operating conditions unless otherwise specified.) 3067 FRM T05.4 STANDARD PARTS 3067 FRM T08.1 Notes: (4) Typical values are for TA = 25°C and nominal supply voltage. (5) This parameter is periodically sampled and not 100% tested. Symbol Parameter Limits Units Test ConditionsMin. Typ.(4) Max. ICC VCC Active Current 1 3 mA PU or PD held at VIL the other at VIH ISB Standby Supply Current 100 200 mA PU = PD = VIH ILI PU , PD , ASE Input Leakage Current 10 mA VIN = VSS to VCC VIH PU , PD , ASE Input HIGH Voltage 2 VCC + 1 V VlL PU , PD , ASE Input LOW Voltage –1 0.8 V R W Wiper Resistance 40 100 W Max. Wiper Current –1mA VVH VH Terminal Voltage –5 +5 V VVL VL Terminal Voltage –5 +5 V C IN (5) ASE , PU , PD Input Capacitance 10 pF VCC = 5V, VIN = 0V, TA = 25°C, f = 1MHz Part Number Maximum Resistance Wiper Increments Minimum Resistance X9511Z 1KW 32.3W 40W X9511W 10KW 323W 40W

A.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified.) 3067 FRM T07.3 AUTOSTORE Cycle Timing Diagram Notes: VASTH – AUT OST ORE threshold voltage VASEND – AUT OST ORE cycle end voltage tAST O – AUT OST ORE cycle time (6) Typical values are for TA = 25°C and nominal supply voltage. (7) This parameter is periodically sampled and not 100% tested. Symbol Parameter Limits UnitsMin. Typ.(6) Max. tGAP Time Between Two Separate Push Button Events 0 ms tDB Debounce Time 30 60 ms tS SLOW After Debounce to Wiper Change on a Slow Mode 100 250 375 ms tS FAST (7) Wiper Change on a Fast Mode 25 50 75 ms tPU (7) Power Up to Wiper Stable 500 ms tR VCC (7) VCC Power-up Rate 0.2 50 mV/ms tASTO (7) AUTOSTORE Cycle Time 2 ms VASTH (7) AUTOSTORE Threshold Voltage 4 V VASEND (7) AUTOSTORE Cycle End Voltage 3.5 V 3067 ILL F04.2 AUT OST ORE CYCLE IN PROGRESS VASTH VASEND tAST O VCC VOL TS (V) ST ORE TIME TIME (ms)

Notes: (1) MI in the A.C. timing diagram refers to the minimum incremental change in the wiper voltage. Fast Mode Timing Notes: (1) MI in the A.C. timing diagram refers to the minimum incremental change in the wiper voltage. PU VW MI (1) tDB 3067 ILL F07.1 tGAP VW

3067 ILL F08

MI (1)

1 Second

3926 FHD F01

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 PLANE 0.065 (1.65) 0.045 (1.14) 0.260 (6.60) 0.020 (0.51) TYP. 0.010 (0.25) 15° 8-LEAD PLASTIC DUAL IN-LINE PACKAGE TYPE P HALF SHOULDER WIDTH ON ALL END PINS OPTIONAL 0.015 (0.38) MAX. 0.325 (8.25) 0.300 (7.62)

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° 3926 FHD F22.1 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 PLACESFOOTPRINT

ORDERING INFORMATION

Blank = Commercial = 0°C to +70°C I = Industrial = –40°C to +85°C Package P = 8-Lead Plastic DIP LIMITED W ARRANTY Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. mak es 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, licenses are implied. U.S. PATENTS Xicor products are covered by one or more of the following U.S. Patents: 4,263,664; 4,274,012; 4,300,212; 4,314,265; 4,326,134; 4,393,481; 4,883, 976. 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 occurence. 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. S = 8-Lead SOIC M = Military = –55°C to +125°C End to End Resistance Z = 1KW W = 10KW