X9C102 Datasheet, PDF (1/15 Pages) Xicor Inc. – E2POT™ Nonvolatile Digital Potentiometer

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
E²POT^™ Nonvolatile Digital Potentiometer
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 = 1KΩ
• X9C103 = 10KΩ
• X9C503 = 50KΩ
• X9C104 = 100KΩ
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.
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
E²POT^™ 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