ADM1027ARQZ-REEL7 ON Semiconductor, ADM1027ARQZ-REEL7 Datasheet - Page 44

• Manufacturer Part Number: ADM1027ARQZ-REEL7
• Description: IC REMOTE THERMAL CTRLR 24QSOP
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of ADM1027ARQZ-REEL7

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Fan Speed Counter, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: 0°C ~ 105°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: 0°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 24-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADM1027
Bit
<0>
<1>
<2>
<3>
<4>
<5>
<6>
<7>
Bit
<0>
<1>
<2>
<3>
<4>
<5>
<6>
<7>
Name
Name
2.5 V
V
V
5 V
R1T
LT
R2T
OOL
12 V
OVT
FAN1
FAN2
FAN3
FAN4
D1
D2
CCP
CC
Table XI. Register 0x42 – Interrupt Status Register 2 (Power-On Default = 0x00)
Table X. Register 0x41 – Interrupt Status Register 1 (Power-On Default = 0x00)
Read/Write
Read-Only
Read-Only
Read-Only
Read-Only
Read-Only
Read-Only
Read-Only
Read-Only
Read/Write
Read-Only
Read-Only
Read-Only
Read-Only
Read-Only
Read-Only
Read-Only
Read-Only
A 1 indicates the 2.5 V high or low limit has been exceeded. This bit is cleared on a read
A 1 indicates the V
A 1 indicates the V
A 1 indicates the 5 V high or low limit has been exceeded. This bit is cleared on a read of
A 1 indicates the local low or high temp limit has been exceeded. This bit is cleared on
A 1 indicates the Remote 2 low or high temperature limit has been exceeded. This bit is
A 1 indicates that an out-of-limit event has been latched in Status Register 2. This bit is
A 1 indicates the 12 V high or low limit has been exceeded. This bit is cleared on a read
A 1 indicates that Fan 1 has dropped below minimum speed or has stalled. This bit is
A 1 indicates that Fan 2 has dropped below minimum speed or has stalled. This bit is
A 1 indicates that Fan 3 has dropped below minimum speed or has stalled. This bit is
A 1 indicates that Fan 4 has dropped below minimum speed or has stalled. This bit is
A 1 indicates either an open or short circuit on the Thermal Diode 1 inputs.
A 1 indicates either an open or short circuit on the Thermal Diode 2 inputs.
Description
of the status register only if the error condition has subsided.
of the status register only if the error condition has subsided.
of the status register only if the error condition has subsided.
the status register only if the error condition has subsided.
A 1 indicates the Remote 1 low or high temp limit has been exceeded. This bit is
cleared on a read of the status register only if the error condition has subsided.
a read of the status register only if the error condition has subsided.
cleared on a read of the status register only if the error condition has subsided.
a logical OR of all status bits in Status Register 2. Software can test this bit in isolation to
determine whether any of the voltage, temperature, or fan speed readings represented by
Status Register 2 are out-of-limit. This saves the need to read Status Register 2 every
interrupt or polling cycle.
Description
of the status register only if the error condition has subsided.
A 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 – 4rC
NOT set when the PWM 1 output is off.
NOT set when the PWM 2 output is off.
NOT set when the PWM 3 output is off.
NOT set when the PWM 3 output is off.
Rev. 3 | Page 44 of 56 | www.onsemi.com
CCP
CC
high or low limit has been exceeded. This bit is cleared on a read
high or low limit has been exceeded. This bit is cleared on a read