Low Noise, Low Power, 32 Taps
X9316
E
2
POT™ Nonvolatile Digital Potentiometer
FEATURES
• Low Micropower CMOS
—V
CC
= 3V to 5.5V
—Active Current, 50
µ
A (Increment) Max
—Standby Current, 400
µ
A (Store) Max
• Low Noise
• 31 Resistive Elements
—Temperature Compensated
—± 20% End to End Resistance Range
—–5V to +5V
• 32 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
• X9316Z = 1K
Ω
• X9316W = 10K
Ω
• Packages
—14-Lead PDIP
—14-Lead SOIC
FUNCTIONAL DIAGRAM
DESCRIPTION
The Xicor X9316 is a solid state “micropower” nonvolatile
potentiometer and is ideal for digitally controlled resis-
tance trimming in battery-powered systems.
The X9316 is a resistor array composed of 31 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 subse-
quent power-up operation.
The resolution of the X9316 is equal to the maximum
resistance value divided by 31. As an example, for the
X9316W (10KΩ) each tap point represents 323Ω.
All Xicor nonvolatile memories are designed and tested
for applications requiring extended endurance and data
retention.
U/D
INC
CS
5-BIT
UP/DOWN
COUNTER
CMOS SWITCH
V
H
5-BIT
NONVOLATILE
MEMORY
ONE
OF
THIRTY-
TWO
WIPER
POSITION
DECODER
RESISTOR
ARRAY
V
CC
V
SS
STORE AND
RECALL
CONTROL
CIRCUITRY
V
L
V+
V–
V
W
7000 FRM F01
E2POT™ is a trademark of Xicor, Inc.
©
Xicor, Inc. 1994, 1995, 1996 Patents Pending
7000-1.5 7/16/97 T6/C0/D6 SH
1
Characteristics subject to change without notice
XICOR [ XICOR INC. ]
