TCM812TERCTR View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
TCM812TERCTR Datasheet PDF : 16 Pages
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TCM811/TCM812
4-Pin Reset Monitors
Features
• Precision VDD Monitor for 2.0V, 2.8V, 3.0V, 3.3V,
5.0V Nominal Supplies
• Manual Reset Input
• 140 ms Minimum RESET Output Duration
• RESET Output Valid to VDD = 1.0V (TCM811)
• Low 6 µA (typ.) Supply Current
• VDD 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
VDD
0.1µF
4
VDD
TCM811
3 MR
PUSH
BUTTON
RESET 2
GND
VDD
PIC
Microcontroller
RESET
INPUT
(Active Low)
GND
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
controller 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 µs (5 µs for
F version) of VDD falling through the reset voltage
threshold. RESET is maintained active for a minimum
of 140 ms after VDD rises above the reset threshold.
The TCM812 has an active high RESET output while
the TCM811 has an active low RESET output. The
output of the TCM811 is valid down to VDD = 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
transient glitches on the VDD line. A low supply current
of 6 µA (VDD = 3.3V) makes these devices ideal for
battery powered applications.
Package Types:
SOT-143
GND 1
4 VDD
TCM811 RESET
TCM812 (RESET)
2
3 MR
© 2007 Microchip Technology Inc.
DS21615C-page 1
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