CAT5129 CATALYST [Catalyst Semiconductor], CAT5129 Datasheet - Page 2

• Manufacturer Part Number: CAT5129
• Description: 32-Tap Digitally Programmable Potentiometer (DPP TM)
• Manufacturer: CATALYST [Catalyst Semiconductor]

CAT5127, CAT5129
PIN CONFIGURATION
DEVICE DESCRIPTION
INC
The INC
direction determined by the condition of the U/D ¯ input.
U/D ¯ : Up/Down Control Input
The U/D ¯ input controls the direction of the wiper
movement. When in a high state and CS
high-to-low transition on INC
move one increment toward the RH terminal. When in
a low state and CS
on INC
towards the R
R
R
not required that this terminal be connected to a
potential greater than the R
to the R
V
Doc. No. 2127 Rev. A
¯¯¯ : Increment Control Input
CC
H
H
: High End Potentiometer Terminal
¯¯¯ will cause the wiper to move one increment
is the high end terminal of the potentiometer. It is
or go below ground, GND.
¯¯¯ input moves the wiper in the up or down
H
terminal cannot exceed the supply voltage,
GND
GND
INC
U/D ¯
U/D ¯
¯¯¯
L
CS
¯¯
R
terminal.
H
MSOP/TDFN
¯¯ is low, any high-to-low transition
TSOT23-6
1
2
3
4
1
2
3
CAT5127
CAT5129
¯¯¯ will cause the wiper to
8 V
7 CS
6 R
5 NC
6 V
5 R
4 INC
L
terminal. Voltage applied
¯¯¯
¯¯
CC
CC
L
H
¯¯ is low, any
PIN DESCRIPTIONS
Name Function
GND Ground
¯¯¯
INC
U/D ¯
V
NC
CS
R
R
¯¯
2
CC
H
L
R
R
not required that this terminal be connected to a
potential less than the R
the R
or go below ground, GND. R
interchangeable.
CS
The chip select input is used to activate the control
input of the device and is active low. When in a high
state, activity on the INC
or change the position of the wiper.
V
¯¯ : Chip Select
CC
L
L
Increment Control
Up/Down Control
Potentiometer High
T
No Connect
Potentiometer Low
T
Chip Select
Supply Voltage
: Low End Potentiometer Terminal (CAT5127 only)
is the low end terminal of the potentiometer. It is
: Supply Input for the device.
L
terminal cannot exceed the supply voltage, V
i
i
l
l
¯¯¯ and U/D ¯ inputs will not affect
H
Characteristics subject to change without notice
terminal. Voltage applied to
L
MSOP/TDFN
and R
CAT5127
© 2006 Catalyst Semiconductor, Inc.
1
2
3
4
5
6
7
8
H
are electrically
CAT5129
SOT23
4
3
5
2
1
6
-
-
CC