APPLICATION NOTES
A V A I L A B L E
AN42 • AN44–48 • AN50 • AN52 • AN53 • AN71 • AN73
Terminal Voltage ±5V, 100 Taps
X9C102/103/104/503
X9C102/103/104/503
E2POT™ Nonvolatile Digital Potentiometer
FEATURES
DESCRIPTION
• Compatible with X9102/103/104/503
• Low Power CMOS
TheXicorX9C102/103/104/503isasolidstatenonvola-
tile potentiometer and is ideal for digitally controlled
resistance trimming.
—V
= 5V
CC
—Active Current, 3mA Max
—Standby Current, 500µA Max
• 99 Resistive Elements
TheX9C102/103/104/503isaresistorarraycomposedof
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.
—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 = 1KΩ
The resolution of the X9C102/103/104/503 is equal to
the maximum resistance value divided by 99. As an
example, for the X9C503 (50KΩ) each tap point repre-
sents 505Ω.
• X9C103 = 10KΩ
All Xicor nonvolatile memories are designed and tested
for applications requiring extended endurance and data
retention.
• X9C503 = 50KΩ
• X9C104 = 100KΩ
FUNCTIONAL DIAGRAM
U/D
INC
CS
7-BIT
UP/DOWN
COUNTER
99
V
H
98
97
96
7-BIT
NONVOLATILE
MEMORY
ONE
OF
ONE-
HUNDRED
DECODER
TRANSFER
GATES
RESISTOR
ARRAY
2
1
0
STORE AND
RECALL
CONTROL
CIRCUITRY
V
CC
GND
V
V
L
W
3863 FHD F01
E2POT™ is a trademark of Xicor, Inc.
©Xicor, Inc. 1994, 1995 Patents Pending
3863-2.4 9/18/96 T2/C0/D0 SH
Characteristics subject to change without notice
1