X93256 Datasheet, PDF (3/9 Pages) Intersil Corporation – Dual Digitally Controlled Potentiometers

X93256
PIN DESCRIPTIONS
TSSOP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Symbol
R_W1
R_L1
CS₁
INC₂
U/D₂
R_H2
V_SS
R_W2
R_L2
CS₂
V_CC
INC₁
U/D₁
R_H1
Brief Description
R_W1. The R_W1 pin of the X93256 is the wiper terminal of the first potentiometer which is equivalent to the
movable terminal of a mechanical potentiometer.
R_L1. The R_H1 and R_L1 pins of the X93256 are equivalent to the fixed terminals of a
mechanical potentiometer. The minimum voltage is V_SS and the maximum is V_CC. The terminology of
R_H1 and R_L1 references the relative position of the terminal in relation to wiper movement
direction selected by the U/D input.
Chip Select 1 (CS₁). The first potentiometer is selected when the CS₁ input is LOW. The current counter
value is stored in nonvolatile memory when CS₁ is returned HIGH while the INC₁ input is also HIGH. After
the store operation is complete, the first potentiometer of the X93256 will be placed in the low power
standby mode until the first potentiometer is selected once again.
Increment 2 (INC₂). The INC₂ input is negative-edge triggered. Toggling INC₂ will move the wiper of the
second potentiometer and either increment or decrement the counter in the direction indicated by the logic
level on the U/D₂ input.
Up/Down 2 (U/D₂). The U/D₂ input controls the direction of the second potentiometer wiper
movement and whether the counter for the second potentiometer is incremented or decremented.
R_H2. The R_H2 and R_L2 pins of the X93256 are equivalent to the fixed terminals of a
mechanical potentiometer. The minimum voltage is V_SS and the maximum is V_CC. The terminology of
R_H2 and R_L2 references the relative position of the wiper terminal for the second potentiometer in relation
to the wiper movement direction selected by the U/D₂ input.
Ground.
R_W2. The R_W2 pin of the X93256 is the wiper terminal of the second potentiometer which is
equivalent to the movable terminal of a mechanical potentiometer.
R_L2. The R_H2 and R_L2 pins of the X93256 are equivalent to the fixed terminals of a
mechanical potentiometer. The minimum voltage is V_SS and the maximum is V_CC. The terminology of
R_H2 and R_L2 references the relative position of the wiper terminal for the second potentiometer in relation
to the wiper movement direction selected by the U/D₂ input.
Chip Select 2 (CS₂). The second potentiometer is selected when the CS₂ input is LOW. The current
counter value is stored in nonvolatile memory when CS₂ is returned HIGH while the INC₂ input is also
HIGH. After the store operation is complete, the second potentiometer of the X93256 will be placed in the
low power standby mode until the second potentiometer is selected once again.
Supply Voltage.
Increment 1(INC₁). The INC₁ input is negative-edge triggered. Toggling INC₁ will move the wiper of the
first potentiometer and either increment or decrement the counter in the direction indicated by the logic
level on the U/D₁ input.
Up/Down 1 (U/D₁). The U/D₁ input controls the direction of the first potentiometer wiper movement and
whether the counter for the first potentiometer is incremented or decremented.
R_H1. The R_H1 and R_L1 pins of the X93256 are equivalent to the fixed terminals of a
mechanical potentiometer. The minimum voltage is V_SS and the maximum is V_CC. The terminology of
R_H1 and R_L1 references the relative position of the wiper terminal for the first potentiometer in relation to
the wiper movement direction selected by the U/D₁ input.
3
FN8188.0
March 4, 2005