A
PPLICATION
N
OTES
A V A I L A B L E
AN42 • AN44–48 • AN50 • AN52 • AN53 • AN71 • AN73
Terminal Voltage
±
5V,
X9C102/103/104/503 100 Taps
X9C102/103/104/503
E
2
POT
™
Nonvolatile Digital Potentiometer
FEATURES
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 (50KΩ) each tap point repre-
sents 505Ω.
All Xicor nonvolatile memories are designed and tested
for applications requiring extended endurance and data
retention.
•
•
•
•
•
•
•
•
•
Compatible with X9102/103/104/503
Low Power CMOS
—V
CC
= 5V
—Active Current, 3mA Max
—Standby Current, 500
µ
A 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
FUNCTIONAL DIAGRAM
U/D
INC
CS
7-BIT
UP/DOWN
COUNTER
99
98
97
VH
7-BIT
NONVOLATILE
MEMORY
ONE
OF
ONE-
HUNDRED
DECODER
96
TRANSFER
GATES
2
RESISTOR
ARRAY
VCC
GND
STORE AND
RECALL
CONTROL
CIRCUITRY
1
0
VL
VW
3863 FHD F01
E
2
POT
™
is 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 [ XICOR INC. ]
