CAT5110, CAT5118, CAT5119
32-Tap MiniPot™ Digitally Programmable Potentiometers
with 2-Wire Interface
FEATURES
s
0.3
µ
A Ultra-low supply current
s
Single-supply operation: 2.7 V to 5.5 V
s
Glitchless switching between resistor taps
s
Power-on reset to midscale
H
LOGEN
FR
A
EE
LE
A
D
F
R
E
E
TM
s
2-Wire up/down serial interface
s
Resistance values: 10kΩ, 50kΩ and 100kΩ
Ω,
Ω
Ω
s
Available in SC70 and SOT-23 packages
APPLICATIONS
s
LCD screen adjustment
s
Volume control
s
Mechanical potentiometer replacement
s
Gain adjustment
s
Line impedance matching
DESCRIPTION
CAT5110/5118/5119 linear-taper digitally programmable
potentiometers perform the same function as a
mechanical potentiometer or a variable resistor. These
devices consist of a fixed resistor and a wiper contact
with 32-tap points that are digitally controlled through a
2-wire up/down serial interface.
The CAT5110 is configured as a potentiometer. The
CAT5118 and CAT5119 are configured as variable
resistors. See
Pin Configurations
for part functionality.
Three resistance values are available: 10kΩ , 50kΩ and
100kΩ. These are available in space-saving 5-pin and
6-pin SC70 and SOT-23 packages.
PIN CONFIGURE
FUNCTIONAL DIAGRAM
H
V
DD
GND
V
DD
1
6 H
V
DD
1
5 H
GND 2
5 W
GND 2
CAT5110
U/D 3
4 CS
U/D 3
CAT5118
4 CS
CS
UP/DN
Counter
32-Position
Decoder
W
U/D
L
V
DD
1
6 H
GND 2
5 L
CAT5119
U/D 3
4 CS
Top View
© 2005 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 2120, Rev. A
CATALYST [ CATALYST SEMICONDUCTOR ]
