ADT7475ARQZ ON Semiconductor, ADT7475ARQZ Datasheet - Page 57

• 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. These registers become read−only when the Configuration Register 1 lock bit is set to 1. Any subsequent attempts to write to these registers fail.
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
*The “Z’’ suffix indicates Pb−Free part.
Table 51. Register 0x7D — Configuration Register 4 (Power−On Default = 0x00)
Table 52. Register 0x7E — Manufacturer’s Test Register 1 (Power−On Default = 0x00)
Table 53. Register 0x7F — Manufacturer’s Test Register 2 (Power−On Default = 0x00)
ORDERING INFORMATION
Specifications Brochure, BRD8011/D.
Bit No.
Bit No.
Bit No.
ADT7475ARQZ
ADT7475ARQZ−REEL
ADT7475ARQZ−RL7
[1:0]
[4:7]
[6:7]
[7:0]
[7:0]
[2]
[3]
[5]
Device Number
PIN9FUNC
on THERM
Mnemonic
BpAttV
Mnemonic
Mnemonic
Reserved
Reserved
Max/Full
THERM
Disable
RES
RES
CCP
Read−only
Read−only
(Note 1)
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Temperature Range
−40°C to +125°C
−40°C to +125°C
−40°C to +125°C
These bits set the functionality of Pin 9:
THERM Disable = 0, THERM overtemperature output is enabled assuming THERM is correctly
configured (Register 0x78, Register 0x7C, and Register 0x7D).
THERM Disable = 1, THERM overtemperature output is disabled on all channels.
THERM can also be disabled on any channel by the following:
Max/Full on THERM = 0. When THERM limit is exceeded, fans go to full speed.
Max/Full on THERM = 1. When THERM limit is exceeded, fans go to maximum speed as
defined in Register 0x38, Register 0x39, and Register 0x3A.
Unused.
Bypass V
(0x00) to 2.2965 V (0xFF).
Unused.
Manufacturer’s test register. These bits are reserved for manufacturer’s test purposes and
should not be written to under normal operation.
Manufacturer’s test register. These bits are reserved for manufacturer’s test purposes and
should not be written to under normal operation.
00 = TACH4 (default)
01 = Bidirectional THERM
10 = SMBALERT
11 = GPIO
In Offset 64 mode, writing −64°C to the appropriate THERM temperature limit.
In twos complement mode, writing −128°C to the appropriate THERM temperature limit.
CCP
attenuator. When set, the measurement scale for this channel changes from 0 V
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16−Lead QSOP
16−Lead QSOP
16−Lead QSOP
Package Type
57
Description
Description
Description
Package Option
RQ−16
RQ−16
RQ−16
2500 Tape & Reel
1000 Tape & Reel
Shipping
98 Rail
†