Datasheet

MAX6832–MAX6840
Ultra-Low-Voltage SC70 Voltage Detectors
and µP Reset Circuits
5
Maxim Integrated
Pin Description—MAX6832–MAX6837
PIN
MAX6833
SC70-3
MAX6832/
MAX6834
SC70-3
MAX6836
SC70-4
MAX6835/
MAX6837
SC70-4
NAME FUNCTION
1 1 1 1 GND Ground
—2—2RESET
Reset Output, Open-Drain or Push-Pull, Active-Low. RESET
changes from HIGH to LOW when V
CC
drops below the
selected reset threshold or MR is pulled low. RESET remains
LOW for the reset timeout period after V
CC
exceeds the device
reset threshold and MR is released high.
2 — 2 — RESET
Reset Output, Push-Pull, Active-High. RESET changes from
LOW to HIGH when the V
CC
input drops below the selected
reset threshold or MR is pulled low. RESET remains HIGH for
the reset timeout period after V
CC
exceeds the device reset
threshold and MR is released high.
—— 3 3MR
Active-Low Manual Reset Input. Internal 20kΩ pullup to V
CC
.
Pull LOW to force a reset. Reset remains active as long as MR is
LOW and for the reset timeout period after MR goes HIGH.
Leave unconnected or connect to V
CC
if unused.
3344V
CC
Supply Voltage and Monitored Supply
Pin Description—MAX6838/MAX6839/MAX6840
PIN
MAX6839
SC70-4
MAX6838/
MAX6840
SC70-4
NAME FUNCTION
1 1 RESET-IN
Adjustable Reset Threshold Input. High-impedance input for reset comparator. Connect
this pin to an external resistive-divider network to set the reset threshold voltage; the
typical threshold is 444mV. Reset is asserted when RESET-IN is below the threshold (V
CC
is not monitored).
22V
CC
Supply Voltage (1.1V to 3.3V)
3 3 GND
Ground
4 — RESET
Reset Output, Push-Pull, Active-High. RESET changes from LOW to HIGH when the
RESET-IN input drops below the typical reset threshold (444mV). RESET remains HIGH for
the reset timeout period after RESET-IN exceeds the reset threshold.
—4RESET
Reset Output, Open-Drain or Push-Pull, Active-Low. RESET changes from HIGH to LOW
when RESET-IN drops below the typical reset threshold (444mV). RESET remains LOW for
the reset timeout period after RESET-IN exceeds the reset threshold.