X9312 Datasheet, PDF (1/9 Pages) Xicor Inc. – E2POT™ Nonvolatile Digital Potentiometer

APPLICATION NOTES
AVA I L A B L E
AN42 • AN44–48 • AN50 • AN52 • AN53 • AN71 • AN73
TXe9r3m12inal Voltage 0V to +15V, 100 Taps
X9312
E²POT™ Nonvolatile Digital Potentiometer
FEATURES
• Compatible with X9C102/103/104/503
• Low Power CMOS
—Active Current, 3mA Max
—Standby Current, 1mA Max
• 99 Resistive Elements
—Temperature Compensated
—±20% End to End Resistance Range
— 0 to +15V 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
• X9312Z = 1KΩ
• X9312W = 10KΩ
• X9312U = 50KΩ
• X9312T = 100KΩ
DESCRIPTION
The Xicor X9312 is a solid state nonvolatile potentiom-
eter and is ideal for digitally controlled resistance trim-
ming.
The X9312 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 nonvola-
tile memory and then be recalled upon a subsequent
power-up operation.
The resolution of the X9312 is equal to the maximum
resistance value divided by 99. As an example, for the
X9312U (50KΩ) each tap point represents 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
E²POT™ is a trademark of Xicor, Inc.
©Xicor, Inc. 1994, 1995 Patents Pending
3865-2.4 12/1/95 T1/C0/D0 NS
99
98
97
ONE ⁹⁶
OF
ONE-
HUNDRED
DECODER
2
1
0
VH
TRANSFER
GATES
RESISTOR
ARRAY
VL
VW
3865 FHD F01
Characteristics subject to change without notice
1