ADT7467 データシートの表示（PDF） - ON Semiconductor

部品番号

コンポーネント説明

メーカー

ADT7467

dbCOOL Remote Thermal Monitor and Fan Controller

ON Semiconductor 

ADT7467

Table 2. PIN FUNCTION DESCRIPTIONS

Pin No. Mnemonic

Description

1

SCL

Digital Input (Open Drain). SMBus serial clock input. Requires SMBus pull-up.

2

GND

Ground Pin for the ADT7467.

3

VCC

Power Supply. Can be powered by 3.3 V standby if monitoring in low power states is required. VCC is also

monitored through this pin. The ADT7467 can also be powered from a 5 V supply. Setting Bit 7 of

Configuration Register 1 (0x40) rescales the VCC input attenuators to correctly measure a 5 V supply.

4

TACH3

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 (low frequency mode only).

5

PWM2

Digital Output (Open Drain). Requires 10 kW typical pull-up. Pulse width modulated output to control the

speed of Fan 2. Can be configured as a high or low frequency drive.

SMBALERT

Digital Output (Open Drain). This pin can be reconfigured as an SMBALERT interrupt output to signal

out-of-limit conditions.

6

TACH1

Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 1. Can be reconfigured as an

analog input (AIN1) to measure the speed of 2-wire fans (low frequency mode only).

7

TACH2

Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 2. Can be reconfigured as an

analog input (AIN2) to measure the speed of 2-wire fans (low frequency mode only).

8

PWM3

Digital I/O (Open Drain). Pulse width modulated output to control the speed of Fan 3 and Fan 4. Requires

10 kW typical pull-up. Can be configured as a high or low frequency drive.

9

TACH4

Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 4. Can be reconfigured as an

analog input (AIN4) to measure the speed of 2-wire fans (low frequency mode only).

GPIO

General-Purpose Open-Drain Digital I/O.

THERM

Alternatively, the pin can be reconfigured as a bidirectional THERM pin, which can be used to time and

monitor assertions on the THERM input. For example, the pin can be connected to the PROCHOT output

of an Intel Pentium 4 processor or to the output of a trip point temperature sensor. This pin can be used

as an output to signal overtemperature conditions.

SMBALERT

Digital Output (Open Drain). This pin can be reconfigured as an SMBALERT interrupt output to signal

out-of-limit conditions.

10

D2−

Cathode Connection to Second Thermal Diode.

11

D2+

Anode Connection to Second Thermal Diode.

12

D1−

Cathode Connection to First Thermal Diode.

13

D1+

Anode Connection to First Thermal Diode.

14

VCCP

Analog Input. Monitors processor core voltage (0 V to 3 V).

15

PWM1

Digital Output (Open Drain). Pulse width modulated output to control the speed of Fan 1. Requires 10 kW

typical pull-up.

XTO

Also functions as the output from the XNOR tree in XNOR test mode.

16

SDA

Digital I/O (Open Drain). SMBus bidirectional serial data. Requires 10 kW typical pull-up.

http://onsemi.com

3

Share Link: