MAX6730A MAXIM [Maxim Integrated Products], MAX6730A Datasheet - Page 11

• Manufacturer Part Number: MAX6730A
• Description: Single-/Dual-/Triple-Voltage ?P Supervisory Circuits with Independent Watchdog Output
• Manufacturer: MAXIM [Maxim Integrated Products]

Microprocessors with bidirectional reset pins can inter-
face directly with the open-drain RST output options.
However, conditions might occur in which the push-pull
output versions experience logic contention with the
bidirectional reset pin of the µP. Connect a 10kΩ resis-
tor between RST and the µP’s reset I/O port to prevent
logic contention (Figure 5).
The MAX6730A–MAX6735A µP supervisors are relative-
ly immune to short-duration falling V
(glitches). Small glitches on V
MAX6730A–MAX6735A, preventing undesirable reset
pulses to the µP. The Typical Operating Characteristics
show Maximum V
Figure 4. Watchdog Input/Output Timing Diagram ( MR and WDO Connected)
RSTIN
V
V
WDO
CC
WDI
RST
CC
MR
1,
2
Interfacing to µPs with Bidirectional
Circuits with Independent Watchdog Output
(MIN)
V
Single-/Dual-/Triple-Voltage µP Supervisory
CC
Applications Information
______________________________________________________________________________________
CC_
V
TH
Transient Duration vs. Reset
t
RP
Falling V
CC
_ are ignored by the
<t
WD-L
CC
CC
Reset Pins
Transients
_ transients
<t
WD-S
>t
WD-S
Figure 5. Interfacing to µPs with Bidirectional Reset I/O
V
CC
t
MR
2
V
CC
1
V
V
t
RP
CC
CC
1
2
MAX6731A
MAX6733A
MAX6735A
GND
RST
COMPONENTS
RESET TO
SYSTEM
OTHER
<t
WD-L
10kΩ
RESET
GND
µP
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