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X9514 Dataheets PDF



Part Number X9514
Manufacturers Xicor
Logo Xicor
Description PushPot Potentiometer (Push Button Controlled)
Datasheet X9514 DatasheetX9514 Datasheet (PDF)

APPLICATION NOTES A V A I L A B L E AN42 • AN44–50 • AN52 • AN53 • AN73 Terminal Voltage ±5V, 32 Taps, Log Taper X9514 X9514 PushPot™ Potentiometer (Push Button Controlled) FEATURES DESCRIPTION The Xicor X9514 is a push button controlled, logarithmic taper potentiometer and is ideal for push button controlled resistance trimming. The X9514 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 o.

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APPLICATION NOTES A V A I L A B L E AN42 • AN44–50 • AN52 • AN53 • AN73 Terminal Voltage ±5V, 32 Taps, Log Taper X9514 X9514 PushPot™ Potentiometer (Push Button Controlled) FEATURES DESCRIPTION The Xicor X9514 is a push button controlled, logarithmic taper potentiometer and is ideal for push button controlled resistance trimming. The X9514 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 poweron operation. All Xicor nonvolatile products are designed and tested for applications requiring extended endurance and data retention. • • • • • • • 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 —Logarithmic Taper —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 X9514W = 10KΩ Packages —8-Lead PDIP —8-Lead SOIC —14-Lead TSSOP FUNCTIONAL DIAGRAM PU PD 5-BIT UP/DOWN COUNTER 31 30 29 5-BIT EEPROM MEMORY 28 VH ONE OF THIRTYTWO DECODER TRANSFER GATES 2 RESISTOR ARRAY ASE STORE AND RECALL CONTROL CIRCUITRY 1 0 VL VW 6487 ILL F01.1 AUTOSTORE is a registered trademark of Xicor, Inc. E2POT™ and PushPot™ are trademarks of Xicor, Inc. ©Xicor, Inc. 1994, 1995, 1996 Patents Pending 6487-3.5 7/3/96 T5/C3/D2 NS 1 Characteristics subject to change without notice X9514 PIN DESCRIPTIONS VH and VL The high (VH) and low (VL) terminals of the X9514 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 and VH references 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: VIL – AUTOSTORE is enabled. When VCC powersdown an automatic store cycle takes place. VIH – AUTOSTORE is disabled. A LOW to HIGH will initiate 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 X9514 will store the current wiper position to the E2PROM. Typical Attenuation Characteristics (dB) 0 PU PD NC NC NC VH VSS 1 2 3 4 5 6 7 X9514 14 13 12 11 10 9 8 VCC ASE NC NC NC VL VW 6487 ILL F02.2 PIN CONFIGURATION DIP/SOIC PU PD VH VSS 1 2 3 4 X9514 8 7 6 5 VCC ASE VL VW TSSOP PIN NAMES Symbol VH VW VL VSS VCC PU PD ASE NC Description High Terminal Wiper Terminal Low Terminal Ground Supply Voltage Push Up Input Push Down Input AUTOSTORE Enable Input No Connect 6487 PGM T01.2 ATTENUATION (dB) -20 -40 -43.5 -60 31 28 24 20 16 TAP POSITION 12 8 4 0 6487 ILL F04 2 X9514 DEVICE OPERATION There are three sections of the X9514: the input control, counter and decode section; the E2PROM 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 E2PROM 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 X9514 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 l.


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