Rainbow Electronics MAX6764 - Manual (Page 15)

MAX6754–MAX6764
Low-Power, Single/Dual-Voltage Window
Detectors
______________________________________________________________________________________ 15
Applications Information
Microprocessor Monitoring
Figure 8 shows a microprocessor monitoring circuit. An
overvoltage condition on either the core or I/O supply
turns the SCR on, blowing the fuse to disconnect the
circuit from the power source. An optional capacitor
(C1) on the gate of the SCR provides additional tran-
sient immunity against nuisance trips.
MAX6760
GND
SET
V CC2
V CC
UV
OV
MR
OVLATCH
PUSH BUTTON
RESET
NMI
I/O
DC-DC
CONVERTER
CORE
DC-DC
CONVERTER
µP
I/O
CORE
FUSE
UNREGULATED
POWER SOURCE
SCR
100k Ω 100k Ω
100k Ω
*C1
1
µF *OPTIONAL.
Figure 8. Microprocessor Monitoring
Selector Guide
PUSH-PULL
RESET
PUSH-PULL
RESET
OPEN-DRAIN
RESET
PUSH-PULL
UV
PUSH-PULL
UV
OPEN-DRAIN
UV
PUSH-PULL
OV
OPEN-DRAIN
OV
MAX6754 X — — — — — — —
MAX6755 — X — — — — — —
MAX6756 — — X — — — —
MAX6757 — — — X — — — X
MAX6758 — — — — X — — X
MAX6759 — — — — — X — X
MAX6760 — — — X — — — X
MAX6761 — — — — X — — X
MAX6762 — — — — — X — X
MAX6763 — — — X — — X —
MAX6764 — — — — X — — X