ADT7463ARQZ ON Semiconductor, ADT7463ARQZ Datasheet - Page 5

• Manufacturer Part Number: ADT7463ARQZ
• Description: IC REMOTE THERMAL CTRLR 24-QSOP
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of ADT7463ARQZ

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Fan Speed Counter, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 120°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 120°C
• Mounting Type: Surface Mount
• Package / Case: 24-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
REV. C
Mnemonic
SDA
SCL
GND
V
VID0
VID1
VID2
VID3
TACH3
PWM2
SMBALERT
TACH1
TACH2
PWM3
ADDRESS ENABLE
TACH4
ADDRESS
SELECT
THERM
D2–
D2+
D1–
D1+
VID4
+5V
THERM
+12V
VID5
+2.5V
SMBALERT
V
PWM1/
XTO
CC
CCP
IN
IN
IN
Digital I/O (Open Drain). SMBus bidirectional serial data. Requires SMBus.
Digital Input (Open Drain). SMBus serial clock input. Requires SMBus pull-up.
Ground Pin for the ADT7463.
Power Supply. Can be powered by 3.3 V standby if monitoring in low power states is required. V
monitored through this pin. The ADT7463 can also be powered from a 5 V supply. Setting Bit 7 of Configura-
tion Register 1 (Reg. 0x40) rescales the V
Digital Input (Open Drain). Voltage supply readouts from CPU. This value is read into the VID register (Reg. 0x43).
Digital Input (Open Drain). Voltage supply readouts from CPU. This value is read into the VID register (Reg. 0x43).
Digital Input (Open Drain). Voltage supply readouts from CPU. This value is read into the VID register (Reg. 0x43).
Digital Input (Open Drain). Voltage supply readouts from CPU. This value is read into the VID register (Reg. 0x43).
Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 3. Can be reconfigured as an analog
input (AIN3) to measure the speed of 2-wire fans.
Digital Output (Open Drain). Requires 10 kΩ typical pull-up. Pulse-width modulated output to control FAN 2
speed.
Digital Output (Open Drain). This pin may be reconfigured as an SMBALERT interrupt output to signal
out-of-limit conditions.
Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 1. Can be reconfigured as an analog
Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 2. Can be reconfigured as an analog
Digital I/O (Open Drain). Pulse-width modulated output to control Fan 3/Fan 4 speed. Requires 10 kΩ typical
Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 4. Can be reconfigured as an analog
If in address select mode, this pin determines the SMBus device address.
Cathode Connection to Second Thermal Diode.
Cathode Connection to First Thermal Diode.
Analog Input. Monitors 5 V power supply.
Alternatively, this pin may be reconfigured as a bidirectional THERM pin. Can be used to time and monitor
assertions on the THERM input. For example, can be connected to the PROCHOT output of Intel’s Pentium 4
processor or to the output of a trip point temperature sensor. Can be used as an output to signal
overtemperature conditions.
Analog Input. Monitors 12 V power supply.
Digital Input (Open Drain). Voltage supply readouts from CPU. This value is read into the VID register (Reg. 0x43).
Supports VRM10 solutions.
Analog Input. Monitors 2.5 V supply, typically a chipset voltage.
Digital Output (Open Drain). This pin may be reconfigured as an SMBALERT interrupt output to signal
out-of-limit conditions.
Analog Input. Monitors processor core voltage (0 V to 3 V).
Digital Output (Open Drain). Pulse-width modulated output to control Fan 1 speed. Requires 10 kΩ typical pull-up.
Also functions as the output from the XOR tree in XOR test mode.
input (AIN1) to measure the speed of 2-wire fans.
input (AIN2) to measure the speed of 2-wire fans.
pull-up.
If pulled low on power-up, this places the ADT7463 into address select mode, and the state of Pin 14 will determine
the ADT7463’s slave address.
input (AIN4) to measure the speed of 2-wire fans.
Alternatively, the pin may be reconfigured as a bidirectional THERM pin. Can be used to time and monitor
assertions on the THERM input. For example, can be connected to the PROCHOT output of Intel’s Pentium 4
processor or to the output of a trip point temperature sensor. Can be used as an output to signal
overtemperature conditions.
Anode Connection to Second Thermal Diode.
Anode Connection to First Thermal Diode.
Digital Input (Open Drain). Voltage supply readouts from CPU. This value is read into the VID register (Reg. 0x43).
Description
PIN FUNCTION DESCRIPTIONS
Rev. 4 | Page 5 of 52 | www.onsemi.com
–5–
CC
input attenuators to correctly measure a 5 V supply.
ADT7463
CC
is also