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© Semiconductor Components Industries, LLC, 2012
January, 2012 − Rev. 7
1 Publication Order Number:
CAT5120/D
CAT5120, CAT5121,
CAT5122
16-Tap Digitally
Programmable
Potentiometers with
2-Wire Interface
Description
CAT5120/5121/5122 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 16−tap points that are digitally
controlled through a 2−wire up/down serial interface.
The CAT5120 is configured as a potentiometer. The CAT5121 and
CAT5122 are configured as variable resistors. See Pin Configurations
for part functionality.
Three resistance values are available: 10 kW, 50 kW and 100 kW.
These are available in space−saving 5−pin and 6−pin SC−70 and
SOT−23 packages.
Features
• 0.3 mA Ultra−low Standby Current
• Single−supply Operation: 2.7 V to 5.5 V
• Glitchless Switching between Resistor Taps
• Power−on Reset to Midscale
• 2−wire Up/Down Serial Interface
• Resistance Values: 10 kW, 50 kW and 100 kW
• Available in SC−70 and SOT−23 Packages
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
• LCD Screen Adjustment
• Volume Control
• Mechanical Potentiometer Replacement
• Gain Adjustment
• Line Impedance Matching
http://onsemi.com
SC−70
SD SUFFIX
CASE 419AD
PIN CONFIGURATIONS
SOT−23
TB SUFFIX
CASE 527AJ
SC−70
SD SUFFIX
CASE 419AC
SOT−23
TB SUFFIX
CASE 527AH
GND
H
2
CAT5122
16
1
5
34
2
3
4
W
5
CAT5120
SC−70
SOT−23
1
6
2
L
5
CAT5121
3
4
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
ORDERING INFORMATION
CSU/D
V
DD
GND
H
SC−70
SOT−23
CS
U/D
V
DD
GND
H
SC−70
SOT−23
CS
U/D
V
DD
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