ADT7475ARQZ ON Semiconductor, ADT7475ARQZ Datasheet - Page 47

• Manufacturer Part Number: ADT7475ARQZ
• Description: IC REMOTE THERMAL CTRLR 16-QSOP
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of ADT7475ARQZ

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Fan Speed Counter, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 125°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Full Temp Accuracy: +/- 0.5 C
• Digital Output - Bus Interface: Serial (3-Wire, 4-Wire)
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1. Setting the Configuration Register 1 lock bit has no effect on these registers.
2. High limits: an interrupt is generated when a value exceeds its high limit (> comparison); low limits: an interrupt is generated when a value
1. Exceeding any of these temperature limits by 1°C causes the appropriate status bit to be set in the interrupt status register. Setting the
2. High limits: an interrupt is generated when a value exceeds its high limit (> comparison); low limits: an interrupt is generated when a value
Table 21. Register 0x42 — Interrupt Status Register 2 (Power−On Default = 0x00)
Table 22. Voltage Limit Registers
Table 23. Temperature Limit Registers
Bit No.
Register Address
Register Address
is equal to or below its low limit (≤ comparison).
Configuration Register 1 lock bit has no effect on these registers.
is equal to or below its low limit (≤ comparison).
[1]
[2]
[3]
[4]
[5]
[6]
[7]
0x4E
0x46
0x47
0x48
0x49
0x4F
0x50
0x51
0x52
0x53
Mnemonic
FAN1
FAN2
FAN3
OVT
F4P
D1
D2
Read−only
Read−only
Read−only
Read−only
Read−only
Read−only
Read−only
Read−only
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
(Note 1)
OVT = 1 indicates that one of the THERM overtemperature limits has been exceeded. This bit
is cleared on a read of the status register when the temperature drops below THERM – T
FAN1 = 1 indicates that Fan 1 has dropped below minimum speed or has stalled. This bit is not
set when the PWM1 output is off.
FAN2 = 1 indicates that Fan 2 has dropped below minimum speed or has stalled. This bit is not
set when the PWM2 output is off.
FAN3 = 1 indicates that Fan 3 has dropped below minimum speed or has stalled. This bit is not
set when the PWM3 output is off.
F4P = 1 indicates that Fan 4 has dropped below minimum speed or has stalled. This bit is not
set when the PWM3 output is off.
When Pin 9 is programmed as a GPIO output, writing to this bit determines the logic output of
the GPIO.
If Pin 9 is configured as the THERM timer input for THERM monitoring, this bit is set when the
THERM assertion time exceeds the limit programmed in the THERM timer limit register (0x7A).
D1 = 1 indicates either an open or short circuit on the Thermal Diode 1 inputs.
D2 = 1 indicates either an open or short circuit on the Thermal Diode 2 inputs.
V
V
V
V
Remote 1 temperature low limit.
Remote 1 temperature high limit.
Local temperature low limit.
Local temperature high limit.
Remote 2 temperature low limit.
Remote 2 temperature high limit.
CCP
CCP
CC
CC
low limit.
high limit.
(Note 1)
low limit.
high limit.
http://onsemi.com
Description (Note 2)
Description (Note 2)
47
Description
Power−On Default
Power−On Default
0xFF
0xFF
0x00
0x00
0x81
0x7F
0x81
0x7F
0x81
0x7F
HYST
.