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TCM811SERC Fiches technique(PDF) 1 Page - Microchip Technology

No de pièce TCM811SERC
Description  4-Pin Microcontroller Reset Monitors
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Fabricant  MICROCHIP [Microchip Technology]
Site Internet  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

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 2002 Microchip Technology Inc.
DS21615B-page 1
M TCM811/TCM812
Features
• Precision V
DD Monitor for 2.0V, 2.8V, 3.0V, 3.3V,
5.0V Nominal Supplies
• Manual Reset Input
• 140 msec Minimum RESET Output Duration
• RESET Output Valid to V
DD = 1.0V (TCM811)
• Low 6 µA (typ.) Supply Current
•V
DD Transient Immunity
• Small 4-Pin SOT-143 Package
• No External Components
• Replacement for MAX811/812 and Offers a Lower
Threshold Voltage Option
• Push-Pull RESET Output
• Temperature Range:
- Commercial (C) -40°C to +85°C
Applications
• Computers
• Embedded Systems
• Battery Powered Equipment
• Critical Microcontroller Power Supply Monitoring
Typical Application Circuit
General Description
The TCM811 and TCM812 are cost effective system
supervisory circuits designed to monitor V
DD in digital
systems and provide a reset signal to the host control-
ler when necessary. A manual reset input is provided
to override the reset monitor and is suitable for use as
a push-button reset. No external components are
required.
The reset output is driven active within 20 µsec (5 µsec
for F version) of V
DD falling through the reset voltage
threshold. RESET is maintained active for a minimum
of 140 msec after V
DD rises above the reset threshold.
The TCM812 has an active high RESET output while
the TCM811 has an active low RESET output. The out-
put of the TCM811 is valid down to V
DD = 1V. Both
devices are available in a 4-Pin SOT-143 package,
specified with a temperature range of -40°C to +85°C.
The TCM811/TCM812 are optimized to reject fast tran-
sient glitches on the V
DD line. A low supply current of
6µA (V
DD = 3.3V) makes these devices ideal for battery
powered applications.
Package Types:
TCM811
V
DD
V
DD
V
DD
RESET
RESET
INPUT
(Active Low)
GND
GND
MR
PUSH
BUTTON
PIC
Microcontroller
4
3
2
0.1µF
V
DD
TCM811 RESET
GND 1
2
TCM812 (RESET)
3
4
MR
SOT-143
4-Pin Microcontroller Reset Monitors


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