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©Xicor, Inc. 1994, 1995 Patents Pending Characteristics subject to change without notice
3863-2.4 9/18/96 T2/C0/D0 SH
DESCRIPTION
The Xicor X9C102/103/104/503 is a solid state nonvola-tile potentiometer and is ideal for digitally controlled
五言古诗大全resistance trimming.
The X9C102/103/104/503 is a resistor array compod of 99 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 CS ,U/D , and INC inputs. The position of the wiper can be stored in nonvolatile memory and then be recalled upon a subquent power-up operation.
The resolution of the X9C102/103/104/503 is equal to the maximum resistance value divided by 99. As an example, for the X9C503 (50K Ω) each tap point repre-nts 505Ω.
All Xicor nonvolatile memories are designed and tested for applications requiring extended endurance and data retention.
FEATURES
•Compatible with X9102/103/104/503•
Low Power CMOS —V CC = 5V
—Active Current, 3mA Max —Standby Current, 500µA Max •99 Resistive Elements
—Temperature Compensated
—± 20% End to End Resistance Range •
100 Wiper Tap Points
—Wiper Positioned via Three-Wire Interface —Similar to TTL Up/Down Counter —Wiper Position Stored in Nonvolatile Memory and Recalled on Power-Up
•100 Year Wiper Position Data Retention •X9C102 = 1K Ω•X9C103 = 10K Ω•X9C503 = 50K Ω•
X9C104 = 100K Ω
E 2POT ™ Nonvolatile Digital Potentiometer
X9C102/103/104/503
E 2POT ™ is a trademark of Xicor, Inc.3863 FHD F01
FUNCTIONAL DIAGRAM
L W
H
V
X9C102/103/104/503
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PIN DESCRIPTIONS V H and V L
The high (V H ) and low (V L ) terminals of the X9C102/103/104/503 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 V L and V H references the relative position of the terminal in relation to wiper movement direction lected by the U/D input and not the voltage potential on the terminal.V W
V W is the wiper terminal, equivalent to the movable terminal of a mechanical potentiometer. The position of the wiper within the array is determined by the control inputs. The wiper terminal ries resistance is typically 40Ω.Up/Down (U/D )
The U/D input controls the direction of the wiper movement and whether the counter is incremented or decremented.Increment (INC )
The INC input is negative-edge triggered. Toggling INC will move the wiper and either increment or decrement the counter in the direction indicated by the logic level on the U/D input.Chip Select (CS )
The device is lected when the CS input is LOW. The current counter value is stored in nonvolatile memory when CS is returned HIGH while the INC input is also HIGH. After the store operation is complete the X9C102/103/104/503 will be placed in the low power standby mode until the device is lected once again.
PIN CONFIGURATION
PIN NAMES
Symbol Description V H
High Terminal V W Wiper Terminal V L Low Terminal V SS Ground
V CC Supply Voltage U/D Up/Down Input INC Increment Input CS Chip Select Input NC
No Connect
3863 PGM T01
V CC CS V L V W
3863 FHD F02.2
INC U/D V H V SS
12
34
8
765
X9C102/
103/104/503
DIP/SOIC
X9C102/103/104/503
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DEVICE OPERATION
There are three ctions of the X9C102/103/104/503:the input control, counter and decode ction; the non-volatile 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 nonvolatile memory and retained for future u. The resistor array is comprid of 99 individual resistors connected in ries. 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 INC , U/D and CS inputs control the movement of the wiper along the resistor array. With CS t LOW the X9C102/103/104/503 is lected and enabled to respond to the U/D and INC inputs. HIGH to LOW transitions on INC will increment or decrement (depending on the state of the U/D input) a ven-bit counter. The output of this counter is decoded to lect one of one-hundred wiper positions along the resistive array.
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.
The value of the counter is stored in nonvolatile memory whenever CS transistions HIGH while the INC input is also HIGH.
When the X9C102/103/104/503 is powered-down, the last counter position stored will be maintained in the nonvolatile memory. When power is restored, the con-tents of the memory are recalled and the counter is ret to the value last stored.
OPERATION NOTES
The system may lect the X9C102/103/104/503, move the wiper, and delect the device without having to store the latest wiper, position in nonvolatile memory.The wiper movement is performed as described above;once the new position is reached, the system would the keep INC LOW while taking CS HIGH. The new wiper position would be maintained until changed by the system or until a power-down/up cycle recalled the previously stored data.
鳞翅目幼虫This would allow the system to always power-up to a pret value stored in nonvolatile memory; then during system operation minor adjustments could be made.The adjustments might be bad on ur preference:system parameter changes due to temperature
The state of U/D may be changed while CS remains LOW. This allows the host system to enable the X9C102/103/104/503 and then move the wiper up and down until the proper trim is attained.T IW /R TOTAL
The electronic switches on the X9C102/103/104/503operate in a “make before break” mode when the wiper changes tap positions. If the wiper is moved veral positions, multiple taps are connected to the wiper for t IW (INC to V W change). The R TOTAL value for the device can temporarily be reduced by a significant amount if the wiper is moved veral positions.R TOTAL with V CC Removed
The end to end resistance of the array will fluctuate once V CC is removed.SYMBOL TABLE
X9C102/103/104/503
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ABSOLUTE MAXIMUM RATINGS*
Temperature under Bias ..................–65°C to +135°C .–65°C to +150°C Voltage on CS , INC , U/D and V CC
with Respect to V SS ...............................–1V to +7V Voltage on V H and V L
Referenced to V SS .................................–8V to +8V ∆V = |V H –V L |
<4V X9C103, X9C503, 10V
Lead Temperature (Soldering, 10 conds)....+300°C ±1mA *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 specifica-tion is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ANALOG CHARACTERISTICS Electrical Characteristics
End-to-End Resistance Tolerance .....................±20%Power Rating at 25°C
<16mW X9C103, X9C503, 10mW .±1mA Max.Typical 40Ω at 1mA < –120dB/Hz Ref: 1V Resolution
Resistance .............................................................1%Linearity
Absolute Linearity (1)........................................±1.0 Ml (2)Relative Linearity (3).....................................±0.2 Ml (2)Temperature Coefficient
(–40°C to +85°C)
<+600 ppm/°C Typical X9C103, X9C503, +300 ppm/°C Typical Ratiometric Temperature Coefficient ............±20 ppm Wiper Adjustability
Unlimited Wiper Adjustment (Non-Store operation) Wiper Position 10,000 Data Changes Physical Characteristics Marking Includes
Manufacturer‘s Trademark Resistance Value or Code Date Code Test Circuit #1
Test Circuit #2
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 /99.
(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.
X9C102/103/104/503
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RECOMMENDED OPERATING CONDITIONS
Temperature Min.Max.Commercial 0°C +70°C Industrial –40°C +85°C Military
–55°C
+125°C
3863 PGM T03.1
Supply Voltage Limits X9C102/103/104/503
5V ±10%
97e
D.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwi specified.)
Limits
Symbol Parameter Min.
Typ.(4)
Max.Units Test Conditions
I CC V CC Active Current 13mA CS = V IL , U/D = V IL or V IH and INC = 0.4V to 2.4V @ max. t CYC I SB Standby Supply Current 200
500µA CS = V CC – 0.3V, U/D and INC =V SS or V CC – 0.3V I LI CS , INC , U/D Input ±10
µA V IN = V SS to V CC
Leakage Current V IH CS , INC , U/D Input 2V CC + 1V HIGH Voltage
V IL CS , INC , U/D Input –1
0.8V LOW Voltage R W Wiper Resistence 40
广州最低工资标准100ΩMax. Wiper Current ±1mA
V H VH Terminal Voltage –5+5V V L VL Terminal Voltage –5
+5V C IN (5)
CS , INC , U/D Input 10
pF
V CC = 5V, V IN = V SS ,Capacitance
T A = 25°C, f = 1MHz
惜别诗3863 PGM T05.3
STANDARD PARTS
Part Number Maximum Resistance
Wiper Increments
Minimum Resistance
X9C1021K Ω10.1Ω40ΩX9C10310K Ω101Ω40ΩX9C50350K Ω505Ω40ΩX9C104
100K Ω
1010Ω
40Ω
3863 PGM T08.1
Notes:(4)Typical values are for T A = 25°C and nominal supply voltage.
营养素菜
(5)This parameter is periodically sampled and not 100% tested.
3863 PGM T04.2
春水春池满
X9C102/103/104/503
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A.C. CONDITIONS OF TEST
MODE SELECTION
菜英文Notes:(6)Typical values are for T A = 25°C and nominal supply voltage.
(7)This parameter is periodically sampled and not 100% tested.
(8)MI in the A.C. timing diagram refers to the minimum incremental change in the V W output due to a change in the wiper position.
