Rainbow Electronics MAX6869 - Manual (Page 7)

MAX6854–MAX6869
Nanopower µP Supervisory Circuits with
Optional Manual Reset, Watchdog Timer
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MAX6861/MAX6862/MAX6863 Pin Description
PIN
MAX6861/
MAX6863
MAX6862
NAME FUNCTION
1 1 CT
Reset Timeout Select Input. Connect CT low to select the D1 reset timeout output
period (see Tables 1 and 4). Connect CT high (normally V
CC ) to select the D3
reset timeout period.
2 2 GND Ground
3 3 MR
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 10k Ω .
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 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.
5 5 V CC
Supply Voltage. Input for V CC reset monitor. For noisy systems, bypass V CC with
a 0.1µF capacitor to GND.
— 4 RESET
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 .