ADT7460ARQZ ON Semiconductor, ADT7460ARQZ Datasheet - Page 42

• Manufacturer Part Number: ADT7460ARQZ
• Description: IC REMOTE THRML/FAN CTRLR 16QSOP
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of ADT7460ARQZ

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 120°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 120°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Full Temp Accuracy: +/- 3 C
• Digital Output - Bus Interface: Serial (3-Wire)
• Maximum Operating Temperature: + 120 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADT7460
Table 57. TEMP T
Reg
0x5F
0x60
0x61
These re isters b
ef
Table 58. TEM T
Bit
<2:0>
<3>
<7:4>
fect.
iste
r Addre s
g
Name
FREQ
THRM
RANG
P
s
ecom
E
RANGE
RANGE
R/W
Read/Writ
Read/Write
Read/Writ
es read-o
/PWM Frequency Registers (Power-On Default 0xC4)
/PWM
e
e
nly w en he C
Freq enc Re
u
h
R/W
Read/Write
Read/Write
Read/Write
Description
T ese
000
001
010
011
100
110
111
THRM = 1 causes the THERM pin (Pin 9) to assert low as an output when this temperature channel’s
THERM limit is exceeded by 0.25°C. The THERM pin remains asserted until the temperature is equal
to or below the THERM limit. The minimum time that THERM asserts for is one monitoring cycle.
This allows clock modulation of devices that incorporate this feature.
THRM = 0 makes the THERM pin act as an input only, for example, for Pentium 4 PROCHOT
monitoring, when Pin 9 is configured as
These bits determine the PWM duty cycle vs. temper
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
t
y
h
gister Bits
onfiguration Regis
bits control the PW
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
11.0 Hz
14.7 Hz
22.1 Hz
29.4 Hz
35.3 Hz (default) 101 = 44.1 Hz
58.8 Hz
88.2 Hz
2°C
2.5°C
3.33°C
4°C
5°C
6.67°C
8°C
10°C
13.33°C
16°C
20°C
26.67°C
32°C (Default)
40°C
53.33°C
80°C
Rev. C | Page 42 of 52
ter 1 l
Mx fre
ock bit is set to 1. Further attempts to write to this register have no
quency.
Description
Remote 1 T
Local Temp T
Remote 2 T
THERM
RANGE
RANGE
RANGE
.
/PWM1 frequency
/PWM3 frequency
/PWM2 frequency
ature slope for automatic fan control
.