DS1780 Просмотр технического описания (PDF) - Maxim Integrated

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производитель

DS1780

CPU Peripheral Monitor

Maxim Integrated 

www.dalsemi.com

DS1780

CPU Peripheral Monitor

FEATURES

§ Direct-to-digital temperature sensor requires

no external components or user calibration

§ Two fan speed sensors

§ Monitors 6 power supply voltages

§ 8-bit DAC for fan speed control

§ Intrusion detect for security (detects when

chassis lid has been removed, even if power is

off)

§ Remote system reset

§ System interrupt availability on all monitored

functions (temperature, voltages, fan speed,

chassis intrusion)

§ 2-wire interface with 2-bit addressability

§ Integrated NAND TREE for board level

testability

§ Wide power supply range (2.8V £ VDD £

5.75V)

§ High integration in a small 24-pin 173-mil

TSSOP

§ Applications include monitoring of personal

computers or any microprocessor-based

system

PIN ASSIGNMENT

A0/NTOUT

1

A1 2

SDA 3

SCL 4

FAN1 5

FAN2 6

CHS 7

GNDD 8

VDD

9

INT 10

VOUT/NTIN

11

RST 12

24 VID0

23 VID

22 VID2

21 VID3

20 VID4

19

+VCCP1

18 +2.5 VIN

17 +3.3 VIN

16

+5 VIN

15 +12 VIN

14

+2.5 VS/+VCCP2

13 GNDA

DS1780E+

24-Pin TSSOP (173-mil)

PIN DESCRIPTION

A0/NTOUT

TREE

- Address Input / NAND

Output

A1

- Address Input

SDA

- 2-Wire Serial Data

Input/Output

SCL

- 2-Wire Serial Clock

FANx

- Tachometer Inputs

CHS

- Chassis Intrusion Detector

Input

GNDD

- Digital Ground

VDD

- Power Supply Voltage (2.8V

to 5.75V)

INT

- Hardware Interrupt output

VOUT/NTIN

- DAC output / NAND TREE

Input

RST

- Remote System Reset

GNDA

- Analog Ground

+xxVIN

+2.5VS/+VCCP2

- Positive Voltage Inputs

- Positive/negative Voltage

Input

VIDx

- Processor Voltage Supply

Readout Inputs

See Table 11 on page 27 for Ordering Information

1 of 28

032305

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