CAT5136 Datasheet, PDF (2/11 Pages) ON Semiconductor – Digital Potentiometers (POTs) with 128 Taps and I2C Interface

CAT5136, CAT5137, CAT5138
VDD
VDD
SCL
I²C
Interface
SCL
I²C
Interface
RH
SDA
and
Control
RW
SDA
and
Control
RW
Power On
Midscale
RL
Power On
Midscale
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 CAT5136−8
Serial Data Input/Output − Bidirectional Serial Data pin used to transfer data into
and out of the CAT5136−8. This is an Open-Drain I/O and can be wire OR’d with
other Open-Drain (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
Symbol
Range
Unit
Temperature Under Bias
−55 to +125
C
Storage Temperature Range
T_STG
−65 to 150
C
Voltage on any SDA, SCL, A0 & A1 pins with respect to Ground (Note 1)
−0.3 to V_DD + 0.3
V
Voltage on RH, RL & RW pins with respect to Ground
−0.3 to V_DD + 0.3
V
V_DD with respect to Ground
Wiper Current (10 sec)
−0.3 to +6
V
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. Latch-up protection is provided for stresses up to 100 mA on address and data pins from −0.3 V to V_DD +0.3 V.
Table 3. RECOMMENDED OPERATION CONDITIONS
Parameter
Digital Supply Voltage
Operating Temperature Range
Symbol
V_DD
Value
Unit
+2.7 to +5.5
V
−40 to +85
C
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