ADT7467 Analog Devices, Inc., ADT7467 Datasheet - Page 6

• Manufacturer Part Number: ADT7467
• Description: Dbcool Remote Thermal Monitor And Fan Controller
• Manufacturer: Analog Devices, Inc.

ADT7467
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 3. Pin Function Descriptions
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Mnemonic
SCL
GND
V
TACH3
PWM2
SMBALERT
TACH1
TACH2
PWM3
TACH4
GPIO
THERM
SMBALERT
D2−
D2+
D1−
D1+
V
PWM1
XTO
SDA
CC
CCP
Description
Digital Input (Open Drain). SMBus serial clock input. Requires SMBus pull-up.
Ground Pin for the ADT7467.
Power Supply. Can be powered by 3.3 V standby if monitoring in low power states is required. V
through this pin. The ADT7467 can also be powered from a 5 V supply. Setting Bit 7 of Configuration Register 1
(Reg. 0x40) rescales the V
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).
Digital Output (Open Drain). Requires 10 kΩ typical pull-up. Pulse width modulated output to control the speed of Fan 2.
Can be configured as a high or low frequency drive.
Digital Output (Open Drain). This pin can 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 input
(AIN1) to measure the speed of 2-wire fans (low frequency mode only).
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).
Digital I/O (Open Drain). Pulse width modulated output to control the speed of Fan 3 and Fan 4. Requires 10 kΩ
typical pull-up. Can be configured as a high or low frequency drive.
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).
General-Purpose Open Drain Digital I/O.
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.
Digital Output (Open Drain). This pin can be reconfigured as an SMBALERT interrupt output to signal out-of-limit
conditions.
Cathode Connection to Second Thermal Diode.
Anode Connection to Second Thermal Diode.
Cathode Connection to First Thermal Diode.
Anode Connection to First Thermal Diode.
Analog Input. Monitors processor core voltage (0 V − 3 V).
Digital Output (Open Drain). Pulse width modulated output to control the speed of Fan 1. Requires 10 kΩ typical pull-up.
Also functions as the output from the XNOR tree in XNOR test mode.
Digital I/O (Open Drain). SMBus bidirectional serial data. Requires 10 kΩ typical pull-up.
PWM2/SMBALERT
CC
TACH3
TACH1
TACH2
PWM3
input attenuators to correctly measure a 5 V supply.
GND
SCL
V
CC
1
2
3
4
5
6
7
8
(NOT TO SCALE)
ADT7467
Figure 3. Pin Configuration
TOP VIEW
Rev. A | Page 6 of 80
16
15
14
13
12
11
10
9
SDA
PWM1/XTO
D1+
D1–
D2+
D2–
TACH4/GPIO/THERM/SMBALERT
V
CCP
CC
is also monitored