CAT5136 Datasheet, PDF (1/11 Pages) ON Semiconductor – Digital Potentiometers (POTs) with 128 Taps and I2C Interface

CAT5136, CAT5137,
CAT5138
Digital Potentiometers (POTs)
with 128 Taps and
I²C Interface
Description
CAT5136, CAT5137, and CAT5138 are a family of digital POTs
operating like mechanical potentiometers in various configurations.
The tap points between the 127 equal resistive elements are connected
to the wiper output via CMOS switches. The switches are controlled
by a 7-bit Wiper Control Register (WCR) via the I²C serial bus.
CAT5136 is configured as a variable resistor. CAT5137 and CAT5138
are resistive voltage dividers, with one terminal of the potentiometer
connected to GND. CAT5137 and CAT5138 have different device IDs,
which makes it possible to use both on the same I²C bus. Upon
power-up, the WCR is set to mid-scale (1000000).
Features
 Single Linear Digital Potentiometer with 128 Taps
 End-to-End Resistance of 10 kW, 50 kW and 100 kW
 I²C Interface
 Wiper goes to Midscale at Power-up
 Digital Supply Range (V_DD): 2.7 V to 5.5 V
 Low Standby Current
 Industrial Temperature Range: −40C to +85C
 6-pin SC−70 Package
 These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
 LCD Screen Adjustment
 Volume Control
 Mechanical Potentiometer Replacement
 Gain Adjustment
 Line Impedance Matching
 VCOM Setting Adjustments
http://onsemi.com
SC−70
SD SUFFIX
CASE 419AD
PIN CONNECTIONS
(for low pin count devices)
VDD 1
6 RL
GND 2
5 RW
SCL 3
4 SDA
CAT5136
VDD 1
6 RH
GND 2
5 RW
SCL 3
4 SDA
CAT5137
CAT5138
(Top Views)
See detailed pin function descriptions on page 2.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
 Semiconductor Components Industries, LLC, 2013
1
July, 2013 − Rev. 1
Publication Order Number:
CAT5136/D