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TC1272ALVNBTR View Datasheet(PDF) - Microchip Technology

Part NameTC1272ALVNBTR Microchip
Microchip Technology Microchip
Description3-Pin Reset Monitor
TC1272ALVNBTR Datasheet PDF : 12 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
3.3 Controllers and Processors With
Bidirectional I/O Pins
Some microcontrollers have bidirectional reset pins.
Depending on the current drive capability of the
controller pin, an indeterminate logic level may result if
there is a logic conflict. This can be avoided by adding
a 4.7 kresistor in series with the output of the
TC1272A (Figure 3-3). If there are other components in
the system that require a reset signal, they should be
buffered so as not to load the reset line. If the other
components are required to follow the reset I/O of the
microcontroller, the buffer should be connected as
shown with the solid line.
TC1272A
Buffer
Buffered RESET
To Other System
Components
VDD
TC1272A
RESET
4.7 k
PICmicro®
MMicCrUo-
RESET
GND
GND
FIGURE 3-3:
Interfacing the TC1272A to
a Bidirectional RESET I/O.
2004 Microchip Technology Inc.
DS21877A-page 5
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