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ADM1026JST Fiches technique(PDF) 4 Page - ON Semiconductor

No de pièce ADM1026JST
Description  Complete Thermal System Management Controller
Download  55 Pages
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
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ADM1026JST Fiches technique(HTML) 4 Page - ON Semiconductor

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ADM1026
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4
Pin No.
Description
Type
Mnemonic
17
INT
Digital Output
Interrupt Request (Open Drain). The output is enabled when Bit 1 of the
configuration register is set to 1. The default state is disabled. It has an on−chip
100 kW pullup resistor.
18
PWM
Digital Output
Open drain pulse width modulated output for control of the fan speed. This pin
defaults to high for the 100% duty cycle for use with NMOS drive circuitry. If a
PMOS device is used to drive the fan, the PWM output may be inverted by setting
Bit 1 of Test Register 1 = 1.
19
RESETSTBY
Digital Output
Power−On Reset. 5 mA driver (weak 100 kW pullup), active low output (100 kW
pullup) with a 180 ms typical pulse width. RESETSTBY is asserted whenever
3.3 V STBY is below the reset threshold. It remains asserted for approximately
180 ms after 3.3 V STBY rises above the reset threshold.
20
RESETMAIN
Digital I/O
Power−On Reset. 5 mA driver (weak 100 kW pullup), active low output (100 kW
pullup) with a 180 ms typical pulse width. RESETMAIN is asserted whenever 3.3 V
MAIN is below the reset threshold. It remains asserted for approximately 180 ms
after 3.3 V MAIN rises above the reset threshold. If, however, 3.3 V STBY rises with
or before 3.3 V MAIN, then RESETMAIN remains asserted for 180 ms after
RESETSTBY is deasserted. Pin 20 also functions as an active low RESET input.
21
AGND
Ground
Ground pin for analog circuits.
22
3.3 V STBY
Power Supply
Supplies 3.3 V power. Also monitors the 3.3 V standby power rail.
23
DAC
Analog Output
0 V to 2.5 V output for analog control of the fan speed.
24
VREF
Analog Output
Reference Voltage Output. Can be selected as 1.8 V (default) or 2.5 V.
25
D1–/NTESTIN
Analog Input
Connected to a cathode of the first remote temperature sensing diode. If it is held
high at power−on, it activates the NAND tree test mode.
26
D1+
Analog Input
Connected to the anode of the first remote temperature sensing diode.
27
D2–/AIN9
Programmable
Connected to the cathode of the second remote temperature sensing diode or the
analog input may be reconfigured as a 0 V− 2.5 V analog input.
28
D2+/AIN8
Programmable
Connected to the anode of the second remote temperature sensing diode, or the
analog input may be reconfigured as a 0 V − 2.5 V analog input.
29
VBAT
Analog Input
Monitors battery voltage, nominally +3.0 V.
30
+5.0 VIN
Analog Input
Monitors the +5.0 V supply.
31
−12 VIN
Analog Input
Monitors the −12 V supply.
32
+12 VIN
Analog Input
Monitors the +12 V supply.
33
+VCCP
Analog Input
Monitors the processor core voltage (0 V to 3.0 V).
34
AIN7
Analog Input
General−purpose 0 V to 2.5 V analog inputs.
35
AIN6
Analog Input
General−purpose 0 V to 2.5 V analog inputs.
36
AIN5
Analog Input
General−purpose 0 V to 3.0 V analog inputs.
37
AIN4
Analog Input
General−purpose 0 V to 3.0 V analog inputs.
38
AIN3
Analog Input
General−purpose 0 V to 3.0 V analog inputs.
39
AIN2
Analog Input
General−purpose 0 V to 3.0 V analog inputs.
40
AIN1
Analog Input
General−purpose 0 V to 3.0 V analog inputs.
41
AIN0
Analog Input
General−purpose 0 V to 3.0 V analog inputs.
42
GPIO16/THERM
Digital I/O
General−purpose I/O pin that can be configured as a digital input or output. Can
also be configured as a bidirectional THERM pin (100 kW pullup).
43
GPIO15
Digital I/O
General−purpose I/O pin that can be configured as a digital input or output.
44
GPIO14
Digital I/O
General−purpose I/O pin that can be configured as a digital input or output.
45
GPIO13
Digital I/O
General−purpose I/O pin that can be configured as a digital input or output.
46
GPIO12
Digital I/O
General−purpose I/O pin that can be configured as a digital input or output.
47
GPIO11
Digital I/O
General−purpose I/O pin that can be configured as a digital input or output.
48
GPIO10
Digital I/O
General−purpose I/O pin that can be configured as a digital input or output.
†GPIO pins are open drain and require external pullup resistors. Fan inputs have integrated 10 kW pullups, but these pins become open drain
when reconfigured as GPIOs.


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