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X9C503 Datasheet Preview

X9C503 Datasheet

E2POT Nonvolatile Digital Potentiometer

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APPLICATION NOTES
AVA I L A B L E
AN42 • AN44–48 • AN50 • AN52 • AN53 • AN71 • AN73
XTe9rCm1i0n2a/l1V0o3/l1ta0g4e/5±053V, 100 Taps
X9C102/103/104/503
E2POTNonvolatile Digital Potentiometer
FEATURES
Compatible with X9102/103/104/503
Low Power CMOS
—VCC = 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
X9C103 = 10K
X9C503 = 50K
X9C104 = 100K
DESCRIPTION
The Xicor X9C102/103/104/503 is a solid state nonvola-
tile potentiometer and is ideal for digitally controlled
resistance trimming.
The X9C102/103/104/503 is a resistor array composed 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
subsequent 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) each tap point repre-
sents 505.
All Xicor nonvolatile memories are designed and tested
for applications requiring extended endurance and data
retention.
FUNCTIONAL DIAGRAM
U/D 7-BIT
INC UP/DOWN
CS COUNTER
7-BIT
NONVOLATILE
MEMORY
VCC
GND
STORE AND
RECALL
CONTROL
CIRCUITRY
99
98
97
ONE 96
OF
ONE-
HUNDRED
DECODER
2
1
0
VH
TRANSFER
GATES
RESISTOR
ARRAY
VL
VW
3863 FHD F01
E2POTis a trademark of Xicor, Inc.
©Xicor, Inc. 1994, 1995 Patents Pending
3863-2.4 9/18/96 T2/C0/D0 SH
1 Characteristics subject to change without notice




Xicor

X9C503 Datasheet Preview

X9C503 Datasheet

E2POT Nonvolatile Digital Potentiometer

No Preview Available !

X9C102/103/104/503
PIN DESCRIPTIONS
VH and VL
The high (VH) and low (VL) 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 VL and VH references the relative position
of the terminal in relation to wiper movement direction
selected by the U/D input and not the voltage potential on
the terminal.
VW
VW 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 series resistance is
typically 40.
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 selected 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 selected once again.
PIN CONFIGURATION
INC
U/D
VH
VSS
DIP/SOIC
18
2 X9C102/ 7
3 103/104/503 6
45
VCC
CS
VL
VW
3863 FHD F02.2
PIN NAMES
Symbol
VH
VW
VL
VSS
VCC
U/D
INC
CS
NC
Description
High Terminal
Wiper Terminal
Low Terminal
Ground
Supply Voltage
Up/Down Input
Increment Input
Chip Select Input
No Connect
3863 PGM T01
2


Part Number X9C503
Description E2POT Nonvolatile Digital Potentiometer
Maker Xicor
Total Page 15 Pages
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