© Semiconductor Components Industries, LLC, 2010

April, 2010 − Rev. 3

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

Applications

Figure 1. Functional Block Diagram

SST INTERFACE

INPUT

ATTENUATORS

AND

ANALOG

MULTIPLEXER

ADDRESS

SELECTION

TEMPERATURE

VALUE REGISTERS

VOLTAGE

VALUE REGISTERS

A/D

CONVERTER

ON−CHIP

TEMPERATURE

SENSOR

GND

ADT7485A

SST

ADD

2.5 V

D1+

5.0 V

12 V

OFFSET REGISTERS

D1−

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

(Top View)

1

SST

10

ADD

9

2.5 V

8

7

5.0 V

6

ADT7485A

T21

RYWG

G

1

10

T21 = Device Code

R

= Assembly Location

Y

= Year

W

= Work Week

G

= Pb−Free Package

(Note: Microdot may be in either location)