X9316 Datasheet, PDF (2/12 Pages) Xicor Inc. – E 2 POT™ Nonvolatile Digital Potentiometer

X9316
PIN DESCRIPTIONS
V_H and V_L
The high (V_H) and low (V_L) terminals of the X9316 are
equivalent to the fixed terminals of a mechanical potenti-
ometer. The minimum voltage is V_– and the maximum is
V₊. 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 termi-
nal 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 100Ω.
Up/Down (U/D)
The U/D input controls the direction of the wiper move-
ment and whether the counter is incremented or decre-
mented.
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 X9316
will be placed in the low power standby mode until the
device is selected once again.
V₊, V_– (Analog positive/negative power supply)
The V₊ and V_– pins supply an external voltage to the
wiper position decoder.
PIN CONFIGURATION
14-LEAD DIP/SOIC
NC 1
14 NC
INC 2
13
V_CC
U/D 3
12 CS
V_H
4 X9316 11
V_L
V_SS
5
10
V_W
V_–
6
9
V+
NC 7
8
NC
7000 FRM 02
PIN NAMES
Symbol
V_H
V_W
V_L
V_SS
V_CC
U/D
INC
CS
V₊
V_–
Description
High Terminal
Wiper Terminal
Low Terminal
Ground
Supply Voltage
Up/Down Input
Increment Input
Chip Select Input
Positive Analog Voltage
Negative Analog Voltage
7000 FRM T01.1
2