ADM1033ARQZ-REEL(2012) Ver la hoja de datos (PDF) - ON Semiconductor
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ADM1033ARQZ-REEL Datasheet PDF : 35 Pages
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ADM1033
Table 2. THERMAL CHARACTERISTICS
Package Type
16-lead QSOP Package
qJA
qJC
Unit
150
39
C/W
Table 3. PIN ASSIGNMENT
Pin No.
Mnemonic
Description
1
DRIVE1
DRIVE1 Pin Drives Fan 1. Open-drain output. Requires a pullup resistor.
2
TACH1
Fan 1 Fan Speed Measurement Input. Connects to the fan’s TACH output to measure the fan speed.
3
ALERT Comp Open-Drain Active Low Output. Assets low whenever a measurement goes outside its programmed
limits if not masked. Automatically goes high again when the measured parameter falls back within its
limits.
4
NC
No Connect.
5
GND
Ground for Analog and Digital Circuitry.
6
VCC
Power. Can be powered by 3.3 V standby power if monitoring in low power states is required.
7
THERM
Can be configured as an overtemperature interrupt output, or as an input (to monitor PROCHOT output
of an INTEL CPU). A timer measures assertion times on the THERM pin (either input or output).
8
FAN_FAULT/R FAN_FAULT: Open-Drain Output. Asserted low when one or both fans stall. Requires a pullup
EF
resistor to VCC. REF: Analog Input Reference for the THERM Input.
9
D1−
Cathode Connection for the First Thermal Diode or Diode-Connected Transistor.
10
D1+
Anode Connection for the First Thermal Diode or Diode-Connected Transistor.
11
NC
No Connect.
12
NC
No Connect.
13
LOCATION
8-level Analog Input. Used to determine the correct SMBus version and the SMBus address (in fixed
and discoverable mode) and to set the LLL bits in the UDID (in ARP-capable mode).
14
ALERT
Open-Drain Output. SMBusALERT pin. Alerts the system in the case of out-of-limit events, such as
over temperature. Can be configured as sticky SMBus mode or comparator mode.
15
SDA
Serial Bus Bidirectional Data. Connects to the SMBus master’s data line. Requires pullup resistor if
not provided elsewhere in the system.
16
SCL
Serial SMBus Clock Input. Connects to the SMBus master’s clock line. Requires pullup resistor if not
already provided in the system.
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