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Semiconductor Components Industries, LLC, 2012
July, 2012 − Rev. 4
1 Publication Order Number:
ADT7485A/D
ADT7485A
Temperature Sensor and
Voltage Monitor with
Simple Serial Transport
The ADT7485A is a digital temperature sensor and voltage monitor
for use in PC applications with Simple Serial Transport (SST)
interface. It can monitor its own temperature as well as the
temperature of a remote sensor diode. It can also monitor four external
voltage channels and its own supply voltage. The ADT7485A is
controlled by a single SST bidirectional data line. This device is a
fixed-address SST client where the target address is chosen by the
state of the address pin, ADD.
Features
1 On-Chip Temperature Sensor
1 Remote Temperature Sensor
Monitors Up to 5.0 Voltages
SST Interface
This Device is Pb-Free, Halogen Free and is RoHS Compliant
Applications
Personal Computers
Portable Personal Devices
Industrial Sensor Nets
Figure 1. Functional Block Diagram
GND
D1−
D1+
2.5 V
V
CCP
5.0 V
12 V
V
CC
ON-CHIP
TEMPERATURE
SENSOR
INPUT
ATTENUATORS
AND
ANALOG
MULTIPLEXER
A/D
CONVERTER
TEMPERATURE
VALUE REGISTERS
VOLTAGE
VALUE REGISTERS
ADDRESS
SELECTION
OFFSET
REGISTERS
SST
INTERFACE
DIGITAL MUX
ADT7485A
ADD SST
MARKING DIAGRAM
http://onsemi.com
PIN ASSIGNMENT
MSOP−10
CASE 846AC
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
ORDERING INFORMATION
T21
AYWG
G
1
10
T21 = Specific Device Code
A = Assembly Location
Y = Year
W = Work Week
G = Pb-Free Package
(Note: Microdot may be in either location)
2.5 V
SST
ADD
V
CCP
5.0 V
V
CC
GND
D1+
D1−
12 V
10
9
8
7
6
5
4
3
2
1
ADT7485A
(Top View)
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