DS1831S 查看數據表（PDF） - Maxim Integrated

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DS1831S

Multisupply Micromonitor

Maxim Integrated 

DS1831/A/B

3.3V reset or for all reset outputs by the master pushbutton. The DS1831A replaces one reference

comparator and the master pushbutton with watchdog and the DS1831B replaces the 3.3V PBRST with a

last reset status output.

TOL and TD inputs allow user configuration of the DS1831 for multiple applications. The TOL inputs

configure the tolerance for the specified output and the TD inputs configure the reset time delays.

PIN DESCRIPTION

IN5V

5V Power Supply Input

RST 5V

5V Reset Open Drain Output

TOL5V

TD5V

Selects 5V Input Tolerance

Selects 5V Reset Time Delay

PBRST 5V 5V Reset Pushbutton

IN1

Sense Input 1

IN2

ST

GND

Sense Input 2 (DS1831)

Watchdog Strobe Inputs

(DS1831A)

Ground

DS1831 BLOCK DIAGRAM Figure 1

MPBRST

TDWD

NMI2

WDS

NMI1

PBRST 3.3V

PBST

TD3.3V

TOL3.3V

RST 3.3V

Master Pushbutton (DS1831)

Watchdog Time Delay Select (DS1831A)

Non-maskable Interrupt 2 (DS1831)

Watchdog Status Output (DS1831A)

Non-maskable Interrupt 1

3.3V Reset Pushbutton

Pushbutton Status Output (DS1831B)

Select 3.3V Reset Time Delay

Selects 3.3V Input Tolerance

3.3V Reset Open Drain Output

IN3.3V

3.3V Power Supply Input

IN5V

PBRST5V

TD5V

100k

TOL5V

VCC

TOLERANCE

BIAS

+

MPBRST

IN3.3V

PBRST3.3V

TD3.3V

TOL3.3V

-

1.25V T.C.

REFERENCE

100k

100k

Level

Sense

&

VCC

TOLERANCE

BIAS

+

-

-

TIME

DELAY

TIME

DELAY

RST5V

RST3.3V

NMI1

IN1

+

-

NMI2

IN2

+

GROUND

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