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NCT75
http://onsemi.com
2
Figure 1. Simplified Block Diagram
1
V
DD
TWO-WIRE
INTERFACE
DELTA-SIGMA
ADC
CONTROL
LOGIC
REGISTERS
CONFIGURATION
TEMPERATURE
ONE-SHOT
T
HYST
T
OS
2
5
6
7
8
4
3
OS
/ALERT
GND
SDA
SCL
A2
A1
A0
Figure 2. Typical Application Circuit
1
V
DD
 3.0 V To 5.5 V
2
5
6
7
4
3
OS
/ALERT
GND
SDA
SCL
A2
A1
A0
C
BYPASS
ADDRESS
(SET AS DESIRED)
SERIAL INTERFACE
NOTE: SDA, SCL AND OS
/ALERT
 PINS
REQUIRE PULL-UP RESISTORS TO V
DD
NCT75
Table 1. PIN FUNCTION DESCRIPTION
Pin No.
Pin Name
Description
1
SDA
SMBus/I
2
C Serial Bi-directional Data Input/Output. Open-drain pin; needs a pull-up resistor.
2
SCL
Serial Clock Input. Open-drain pin; needs a pull-up resistor.
3
OS
/ALERT
Over-temperature Indicator. Open-drain output; needs a pullup resistor. Active Low output.
4
GND
Power Supply Ground.
5
A2
SMBus/I
2
C Serial Bus Address Selection Pin. Connect to GND or V
DD
 to set the desired I
2
C address.
6
A1
SMBus/I
2
C Serial Bus Address Selection Pin. Connect to GND or V
DD
 to set the desired I
2
C address.
7
A0
SMBus/I
2
C Serial Bus Address Selection Pin. Connect to GND or V
DD
 to set the desired I
2
C address.
8
V
DD
Positive Supply Voltage, 3.0 V to 5.5 V. Bypass to ground with a 0.1 mF bypass capacitor.
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