MAX6854/MAX6855/MAX6856/MAX6858/MAX6860–MAX6869
Nanopower µP Supervisory Circuits with
Manual Reset and Watchdog Timer
6 _______________________________________________________________________________________
MAX6854/MAX6855/MAX6856 Pin Description
PIN
MAX6854/
MAX6856
MAX6855
NAME FUNCTION
1—RESET
Active-Low Open-Drain or Push-Pull Reset Output. RESET transitions 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 deasserts. Push-pull RESET outputs are referenced to
V
CC
. Open-drain RESET outputs require an external pullup resistor.
2, 4 2, 4 GND Ground. Connect all GND inputs to the same potential.
33MR
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
CC
if unused. MR is
internally pulled up to V
CC
through 10kΩ.
55V
CC
Supply Voltage. Input for V
CC
reset monitor. For noisy systems, bypass V
CC
with
a 0.1µF capacitor to GND.
—1RESET
Active-High Push-Pull Reset Output. RESET transitions from low to high when
V
CC
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 deasserts. RESET is referenced to V
CC
.
PIN
MAX6858/
MAX6860
NAME FUNCTION
1, 2 I.C. Internally Connected. For increased noise immunity, connect I.C. to GND.
3 GND Ground
4 RESET
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
V
CC
exceeds the device reset threshold. Push-pull RESET outputs are referenced to V
CC
. Open-
drain RESET outputs require an external pullup resistor.
5V
CC
Supply Voltage. Input for V
CC
reset monitor. For noisy systems, bypass V
CC
with a 0.1µF
capacitor to GND.
