Nanopower µP Supervisory Circuits with
Manual Reset and Watchdog Timer
MAX6854/MAX6855/MAX6856 Pin Description
PIN
NAME
FUNCTION
MAX6854/
MAX6856
MAX6855
Active-Low Open-Drain or Push-Pull Reset Output. RESET transitions from high to
low when V drops below the selected reset threshold or MR is pulled low.
CC
1
—
RESET
RESET remains low for the reset timeout period after V
exceeds the device
CC
reset threshold and MR deasserts. Push-pull RESET outputs are referenced to
. Open-drain RESET outputs require an external pullup resistor.
V
CC
2, 4
3
2, 4
3
GND
Ground. Connect all GND inputs to the same potential.
Active-Low Manual Reset Input. Drive MR low to initiate a reset. The reset output
remains asserted while MR is held low and for the reset timeout period after MR
transitions high. Leave MR unconnected or connect to V
MR
if unused. MR is
CC
internally pulled up to V
through 10kΩ.
CC
Supply Voltage. Input for V
a 0.1µF capacitor to GND.
reset monitor. For noisy systems, bypass V
with
CC
CC
5
5
1
V
CC
Active-High Push-Pull Reset Output. RESET transitions from low to high when
drops below the selected reset threshold or MR is pulled low. RESET
V
CC
—
RESET
remains high for the reset timeout period after V exceeds the device reset
CC
threshold and MR deasserts. RESET is referenced to V
.
CC
MAX6858/MAX6860 Pin Description
PIN
NAME
FUNCTION
MAX6858/
MAX6860
1, 2
3
I.C.
Internally Connected. For increased noise immunity, connect I.C. to GND.
Ground
GND
Active-Low Open-Drain or Push-Pull Reset Output. RESET transitions from high to low when V
CC
drops below the selected reset threshold. RESET remains low for the reset timeout period after
exceeds the device reset threshold. Push-pull RESET outputs are referenced to V . Open-
drain RESET outputs require an external pullup resistor.
4
5
RESET
V
CC
CC
Supply Voltage. Input for V
capacitor to GND.
reset monitor. For noisy systems, bypass V
with a 0.1µF
CC
CC
V
CC
6
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