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ADT7462ACPZ-R7 データシート(PDF) 3 Page - ON Semiconductor

部品番号 ADT7462ACPZ-R7
部品情報  Flexible Temperature, Voltage Monitor, and System Fan Controller
PDF  81 Pages
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メーカー  ONSEMI [ON Semiconductor]
ホームページ  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

ADT7462ACPZ-R7 データシート(HTML) 3 Page - ON Semiconductor

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ADT7462
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3
PIN ASSIGNMENT
Pin
No.
Mnemonic
Description
POR
Default
1
VID0/GPIO1/TACH1
VID0: Digital Input (Open Drain). Voltage supply readouts from CPU. This value
is read in to the VID value register (0x97).
GPIO1: Open−Drain I/O. General−purpose input/output.
TACH1: Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 1.
TACH1
2
VID1/GPIO2/TACH2
VID1: Digital Input (Open Drain). Voltage supply readouts from CPU. This value
is read in to the VID value register (0x97).
GPIO2: Open−Drain I/O. General−purpose input/output.
TACH2: Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 2.
TACH2
3
VID2/GPIO3/TACH3
VID2: Digital Input (Open Drain). Voltage supply readouts from CPU. This value
is read in to the VID value register (0x97).
GPIO3: Open−Drain I/O. General−purpose input/output.
TACH3: Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 3.
TACH3
4
VID3/GPIO4/TACH4
VID3: Digital Input (Open Drain). Voltage supply readouts from CPU. This value
is read in to the VID value register (0x97).
GPIO4: Open−Drain I/O. General−purpose input/output.
TACH4: Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 4.
TACH4
5
VCC
Power Supply. Can be powered by 3.3 V standby if monitoring in low power
states is required. The ADT7462 can also be powered from a 5.0 V supply.
VCC
6
GND
Ground Pin.
GND
7
TACH5/+12V1
TACH5: Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 5.
+12V1: Analog Input. Monitors 12 V Power Supply 1. Attenuators switched on by
default.
TACH5
8
TACH6/+12V2
TACH6: Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 6.
+12V2: Analog Input. Monitors 12 V Power Supply 2. Attenuators switched on by
default.
TACH6
9
SCL
Digital Input (Open Drain). SMBus serial clock input. Requires SMBus pullup.
SCL
10
SDA
Digital I/O (Open Drain). SMBus bidirectional serial data. Requires SMBus
pullup.
SDA
11
ADD
The state of this pin on powerup determines the SMBus device address.
ADD
12
ALERT
Active Low Open−Drain Digital Output. Requires 10 kW typical pullup. The
ALERT pin is used to signal out−of−limit comparisons of temperature, voltage,
and fan speed. This is compatible with SMBus ALERT.
ALERT
13
PWM4/+3.3V
PWM4: Digital Output (Open Drain). Requires 10 kW typical pullup. Pulse−width
modulated output to control the speed of Fan 4.
+3.3V: Analog Input. Monitors 3.3 V power supply.
PWM4
14
RESET
Active Low Open−Drain Digital I/O. Power−on reset, 5 mA driver (weak 100 kW
pullup), active low output (100 kW pullup) with a 180 ms typical pulse width.
RESET is asserted whenever VCC is below the reset threshold. It remains
asserted for approximately 180 ms after VCC rises above the reset threshold. Pin
14 also functions as an active low RESET input and resets all unlocked registers
to their default values.
RESET
15
D1+/+2.5V/+1.8V
D1+: Anode Connection to Thermal Diode 1.
+2.5V: Monitors 2.5 V analog input.
+1.8V: Monitors 1.8 V analog input.
D1+
16
D1−/SCSI_TERM1
D1−: Cathode Connection to Thermal Diode 1.
SCSI_TERM1: Digital Input, SCSI Termination 1.
D1−
17
D2+
Anode Connection to Thermal Diode 2.
D2+
18
D2−
Cathode Connection to Thermal Diode 2.
D2−
19
D3+/+1.25V/+0.9V
D3+: Anode Connection to Thermal Diode 3.
+1.25V: Monitors 1.25 V analog input.
+0.9V: Monitors 0.9 V analog input.
D3+
20
D3−/SCSI_TERM2
D3−: Cathode connection to Thermal Diode 3.
SCSI_TERM2: Digital Input, SCSI Termination 2.
D3−
21
TACH7/+5V
TACH7: Digital Input (Open Drain). Fan tachometer input to measure speed of Fan 7.
+5V: Analog Input. Monitors 5.0 V power supply.
TACH7



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