X9C102 Datasheet, PDF (2/15 Pages) Xicor Inc. – E2POT™ Nonvolatile Digital Potentiometer

X9C102/103/104/503
PIN DESCRIPTIONS
V_H and V_L
The high (V_H) and low (V_L) terminals of the X9C102/103/
104/503 are equivalent to the fixed terminals of a
mechanical potentiometer. The minimum voltage is –5V
and the maximum is +5V. It should be noted that the
terminology of V_L and V_H references the relative position
of the terminal in relation to wiper movement direction
selected by the U/D input and not the voltage potential on
the terminal.
V_W
V_W is the wiper terminal, equivalent to the movable
terminal of a mechanical potentiometer. The position
of the wiper within the array is determined by the
control inputs. The wiper terminal series resistance is
typically 40Ω.
Up/Down (U/D)
The U/D input controls the direction of the wiper
movement and whether the counter is incremented or
decremented.
Increment (INC)
The INC input is negative-edge triggered. Toggling INC
will move the wiper and either increment or decrement
the counter in the direction indicated by the logic level on
the U/D input.
Chip Select (CS)
The device is selected when the CS input is LOW. The
current counter value is stored in nonvolatile memory
when CS is returned HIGH while the INC input is also
HIGH. After the store operation is complete the X9C102/
103/104/503 will be placed in the low power standby
mode until the device is selected once again.
PIN CONFIGURATION
INC
U/D
VH
VSS
DIP/SOIC
1
8
2 _X9C102/ 7
3 ^103/104/503 6
4
5
VCC
CS
VL
VW
3863 FHD F02.2
PIN NAMES
Symbol
V_H
V_W
V_L
V_SS
V_CC
U/D
INC
CS
NC
Description
High Terminal
Wiper Terminal
Low Terminal
Ground
Supply Voltage
Up/Down Input
Increment Input
Chip Select Input
No Connect
3863 PGM T01
2