MAX6316–MAX6322
5-Pin μP Supervisory Circuits with
Watchdog and Manual Reset
Maxim Integrated | 5www.maximintegrated.com
Pin Description
11—
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 pullup 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
V
CC
if not used.
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.
WDI4
Supply Voltage. Reset is asserted when V
CC
drops below the Reset Threshold Voltage (V
RST
).
Reset remains asserted until V
CC
rises above
V
RST
and for the duration of the Reset Timeout
Period (t
RP
) once V
CC
rises above V
RST
.
V
CC
5
Active-High, Reset Output. CMOS push/pull output
(sources and sinks current). Inverse of RESET.
RESET—
GroundGND2
MAX6316L
MAX6316M
MAX6320P
FUNCTIONNAME
