5-Pin µP Supervisory Circuits with

Watchdog and Manual Reset

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5

______________________________________________________________Pin Description

1

1

—

MAX6316M/MAX6318MH/MAX6319MH:

Bidirectional, Active-Low, Reset Output.

Intended to interface directly to microprocessors

with bidirectional resets such as the Motorola

68HC11.

MAX6320P/MAX6321HP/MAX6322HP:

Open-Drain, Active-Low, Reset Output. NMOS out-

put (sinks current only). Connect a pull-up resistor

from RESET to any supply voltage up to 6V.

MAX6316L/MAX6318LH/MAX6319LH:

Active-Low, Reset Output. CMOS push/pull

output (sources and sinks current).

RESET

1

4

—

5

3

2

MAX6319LH

MAX6319MH

MAX6322HP

PIN

—

4

5

3

2

MAX6318LH

MAX6318MH

MAX6321HP

3

4

5

1

2

MAX6317H

Active-Low, Manual Reset Input. Pull low to force a

reset. Reset remains asserted for the duration of

the Reset Timeout Period after MR transitions from

low to high. Leave unconnected or connected to

MR

3

Watchdog Input. Triggers a reset if it remains

either high or low for the duration of the watchdog

timeout period. The internal watchdog timer clears

whenever a reset asserts or whenever WDI sees a

rising or falling edge. To disable the watchdog fea-

ture, leave WDI unconnected or three-state the dri-

ver connected to WDI.

WDI

4

5

Active-High, Reset Output. CMOS push/pull output

(sources and sinks current). Inverse of RESET.

RESET

—

Ground

GND

2

MAX6316L

MAX6316M

MAX6320P

FUNCTION

NAME