Terminal Voltage ± 5V, 32 Taps
PushPot ™ Potentiometer (Push Button Controlled)
FEATURES
•Push Button Controlled •Low Power CMOS
—Active Current, 3mA Max —Standby Current, 200 µ 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 ® Option —Manual Store Option
银潢—Wiper Position Stored in Nonvolatile Memory and Recalled on Power-Up
•100 Year Wiper Position Data Retention •X9511Z = 1K Ω •X9511W = 10K Ω •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 compod 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-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 Ω ) each tap point reprents 323 Ω .All Xicor nonvolatile products are designed and tested for applications requiring extended endurance and data retention.
X9511
X9511
PIN DESCRIPTIONS
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 lected by the PU and PD inputs and not the voltage potential on the terminal. PU
云南高校排名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 – Autostore is enabled. When V CC powers-down an automatic store cycle takes place.
V IH – AUTOSTORE is disabled. A LOW to HIGH will ini-tiate a manual store operation. This is for a ur 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 E2PROM.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
哭字开头的成语ASE
AUTOSTORE Enable Input
X9511
DEVICE OPERATION
There are three ctions of the X9511: the input control, counter and decode ction; the E2PROM memory; and the resistor array. The input control ction 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 u. The resistor array is comprid of 31 individual resistors connected in ries. 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 lect 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 sw
itch 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 cond, the increment/ decrement speed increas. For the first cond the device will be in the slow scan mode. Then if the button is held for longer than 1 cond the device will go into the fast scan mode. As soon as the button is relead 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 E2PROM memory whenever the chip ns 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 ret to the last value stored.
腹背受敌什么意思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 ud to pull ASE LOW and relead 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.
X9511
ABSOLUTE MAXIMUM RATINGS*
T emperature –65°C to +135°C Storage –65°C to +150°C Voltage on PU, PD, and V CC
with Respect to –1V to +7V Voltage on V H and V L
Referenced to –8V to +8V ∆V = |V H–V L|
<4V X9511W ............................................................10V Lead T emperature (Soldering 10 conds)...........300°C ±1mA ANALOG CHARACTERISTICS
天鹅湖赏析Electrical Characteristics
End-to-End Resistance T olerance (20)
Power Rating at 25°C
描写动作的词语10mW Wiper Current .....................................................±1mA Max. T ypical Wiper Resistance ...........................40Ω at 1mA T < –120dB/√Hz Ref: 1V Resolution
Resistance .................................................................3% Linearity
Absolute Linearity(1)...............................................±1.0 Ml(2) Relative Linearity(3)................................
.................±0.2 Ml(2)*COMMENT Stress above tho listed under “Absolute Maximum Ratings” may cau permanent damage to the device. This is a stress rating only and the functional operation of the device at the or any other conditions above tho listed in the operational ctions 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
<+600 ppm/°C T ypical X9511W .........................................+300 ppm/°C T ypical Ratiometric T emperature Coefficient .................±20 ppm
Wiper Adjustability
Unlimited Wiper Adjustment(Non-Store operation) Wiper Position 100,000
生男孩的方法Data Changes
Physical Characteristics
Marking Includes
Manufacturer’s T rademark
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 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.
古风电脑壁纸X9511
RECOMMENDED OPERATING CONDITIONS
3067 FRM T033067 FRM T04.1
Temperature Min.Max. Commercial0°C+70°C Industrial–40°C+85°C Military–55°C+125°C Supply Voltage Limits X95115V ±10%
