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CAT5138 Datasheet

(CAT5136 - CAT5138) Digitally Programmable Potentiometer

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CAT5138 pdf
CAT5136, CAT5137,
CAT5138
Digitally Programmable
Potentiometer (DPP) with
128 Taps and I2C Interface
Description
CAT5136, CAT5137, and CAT5138 are a family of Digitally
Programmable Potentiometers (DPP) 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 7bit 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 powerup, the WCR is
set to midscale (1000000).
Features
Single Linear DPP with 128 Taps
EndtoEnd Resistance of 10 kW, 50 kW and 100 kW
I2C Interface
Wiper goes to Midscale at Powerup
Digital Supply Range (VDD): 2.7 V to 5.5 V
www.DataSheet.co.kr
Low Standby Current
Industrial Temperature Range: 40°C to +85°C
6pin SC70 Package
These Devices are PbFree, 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
SC70
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 10 of this data sheet.
© Semiconductor Components Industries, LLC, 2012
January, 2012 Rev. 0
1
Publication Order Number:
CAT5136/D
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  ON Semiconductor Electronic Components Datasheet  

CAT5138 Datasheet

(CAT5136 - CAT5138) Digitally Programmable Potentiometer

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CAT5138 pdf
CAT5136, CAT5137, CAT5138
VDD
VDD
SCL
SDA
I2C
Interface
and
Control
Power On
Midscale
SCL
I2C
Interface
RW SDA
and
Control
RL
Power On
Midscale
RH
RW
GND
(CAT5136)
GND
(CAT5137, CAT5138)
Figure 1. Block Diagram
Table 1. PIN FUNCTION DESCRIPTION
Pin No.
CAT5136 CAT5137/CAT5138 Pin Name
1 1 VDD
2 2 GND
3 3 SCL
4 4 SDA
5 5 RW
6
RL
6
RH
Description
Digital Supply Voltage (2.7 V to 5.5 V)
Ground
Serial Bus Clock input for the I2C Serial Bus. This clock is used to clock all data
transfers into and out of the CAT51368
Serial Data Input/Output Bidirectional Serial Data pin used to transfer data into
and out of the CAT51368. This is an OpenDrain I/O and can be wire OR’d with
other OpenDrain (or Open Collector) I/Os.
Wiper Terminal for the potentiometer
Low Reference Terminal for the potentiometer
High Reference Terminal for the potentiometer
Table 2. ABSOLUTE MAXIMUM RATINGS
Parameter
www.DataSheet.co.kr
Symbol
Range
Unit
Temperature Under Bias
55 to +125
°C
Storage Temperature Range
TSTG
65 to 150
°C
Voltage on any SDA, SCL, A0 & A1 pins with respect to Ground (Note 1)
0.3 to VDD + 0.3
V
Voltage on RH, RL & RW pins with respect to Ground
VDD with respect to Ground
0.3 to VDD + 0.3
0.3 to +6
V
V
Wiper Current (10 sec)
±6 mA
Lead Soldering temperature (10 sec)
+300
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. Latchup protection is provided for stresses up to 100 mA on address and data pins from 0.3 V to VDD +0.3 V.
Table 3. RECOMMENDED OPERATION CONDITIONS
Parameter
Symbol
Value
Unit
Digital Supply Voltage
Operating Temperature Range
VDD
+2.7 to +5.5
V
40 to +85
°C
http://onsemi.com
2
Datasheet pdf - http://www.DataSheet4U.net/


Part Number CAT5138
Description (CAT5136 - CAT5138) Digitally Programmable Potentiometer
Maker ON Semiconductor
Total Page 10 Pages
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