MAX6316–MAX6322
5-Pin μP Supervisory Circuits with
Watchdog and Manual Reset
Pin Description
PIN
MAX6318LH
MAX6316L
MAX6316M
MAX6320P
MAX6319LH
MAX6318MH MAX6319MH
NAME
FUNCTION
MAX6317H
MAX6321HP
MAX6322HP
MAX6316L/MAX6318LH/MAX6319LH: Active-
Low, Reset Output. CMOS push/pull output
(sources and sinks current).
MAX6316M/MAX6318MH/MAX6319MH:
Bidirectional, Active-Low, Reset Output.
Intended to interface directly to microprocessors
with bidirectional resets such as the Motorola
68HC11.
1
—
1
1
RESET
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.
Active-High, Reset Output. CMOS push/pull output
(sources and sinks current). Inverse of RESET.
—
2
1
2
3
2
3
2
RESET
GND
Ground
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
3
4
5
3
4
5
—
4
—
5
MR
to V
if not used.
CC
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.
4
WDI
Supply Voltage. Reset is asserted when V
drops below the ResetThreshold Voltage (V
CC
RST
).
V
5
Reset remains asserted until V
rises above
CC
CC
V
and for the duration of the ResetTimeout
RST
Period (t ) once V
rises above V
.
RP
CC
RST
Maxim Integrated
│ 5
www.maximintegrated.com