ADT7481
http://onsemi.com
19
Application Circuit
Figure 22 shows a typical application circuit for the
ADT7481, using discrete sensor transistors. The pullups on
SCLK, SDATA, and ALERT
are required only if they are not
already provided elsewhere in the system.
The SCLK and SDATA pins of the ADT7481 can be
interfaced directly to the SMBus of an I/O controller, such
as the Intel® 820 chipset.
Figure 22. Typical Application Circuit
5.0 V or 12 V
SMBUS
CONTROLLER
FAN CONTROL
CIRCUIT
2N3904/06
OR
CPU THERMAL
DIODE
D1+
D1–
D2+
D2–
V
DD
SCLK
SDATA
ALERT
THERM
GND
ADT7481
0.1mF
V
DD
TYP 10kW
FAN ENABLE
3.0 to 3.6 V
TYP 10kW
ORDERING INFORMATION
Device Order Number* Package Type Shipping
†
Branding SMBus Address
ADT7481ARMZ 10-Lead MSOP 50 Tube T08 4C
ADT7481ARMZ-REEL 10-Lead MSOP 3000 Tape & Reel T08 4C
ADT7481ARMZ-R7 10-Lead MSOP 1000 Tape & Reel T08 4C
ADT7481ARMZ-001 10-Lead MSOP 50 Tube T0M 4B
ADT7481ARMZ-1RL 10-Lead MSOP 3000 Tape & Reel T0M 4B
ADT7481ARMZ-1R7 10-Lead MSOP 1000 Tape & Reel T0M 4B
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*The “Z’’ suffix indicates Pb−Free package available.
