ADT7476AARQZ ON Semiconductor, ADT7476AARQZ Datasheet - Page 64

• Manufacturer Part Number: ADT7476AARQZ
• Description: IC REMOTE THERM CTRLR 5V 24QSOP
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of ADT7476AARQZ

• 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: 24-QSOP
• Temperature Threshold: + 150 C
• Full Temp Accuracy: +/- 0.5 C
• Digital Output - Bus Interface: SMBus
• Digital Output - Number Of Bits: 8 bit
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 3 V
• Description/function: Remote Thermal Controller
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Supply Current: 1.5 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 50. Register 0x7B — TACH Pulses per Revolution Register (Power−On Default = 0x55)
Bit No.
[1:0]
[3:2]
[5:4]
[7:6]
Mnemonic
FAN1
FAN2
FAN3
FAN4
R/W
R/W
R/W
R/W
R/W
00 = 1
01 = 2 (default)
10 = 3
11 = 4
00 = 1
01 = 2 (default)
10 = 3
11 = 4
00 = 1
01 = 2 (default)
10 = 3
11 = 4
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Pulses Counted
Pulses Counted
Pulses Counted
Pulses Counted
Sets number of pulses to be counted when measuring Fan 1 speed. Can be used to
determine fan pulses per revolution for unknown fan type.
Sets number of pulses to be counted when measuring Fan 2 speed. Can be used to
determine fan pulses per revolution for unknown fan type.
Sets number of pulses to be counted when measuring Fan 3 speed. Can be used to
determine fan pulses per revolution for unknown fan type.
Sets number of pulses to be counted when measuring Fan 4 speed. Can be used to
determine fan pulses per revolution for unknown fan type.
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Description