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TCM811TERC Datasheet

  • TCM811TERC

  • 4-Pin Microcontroller Reset Monitors

  • 14頁

  • MICROCHIP   MICROCHIP

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M
Features
TCM811/TCM812
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 碌sec (5 碌sec
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擄C to +85擄C.
The TCM811/TCM812 are optimized to reject fast tran-
sient glitches on the V
DD
line. A low supply current of
6 碌A(chǔ) (V
DD
= 3.3V) makes these devices ideal for battery
powered applications.
4-Pin Microcontroller Reset Monitors
鈥?Precision V
DD
Monitor for 2.0V, 2.8V, 3.0V, 3.3V,
5.0V Nominal Supplies
鈥?Manual Reset Input
鈥?140 msec Minimum RESET Output Duration
鈥?RESET Output Valid to V
DD
= 1.0V (TCM811)
鈥?Low 6 碌A(chǔ) (typ.) Supply Current
鈥?V
DD
Transient Immunity
鈥?Small 4-Pin SOT-143 Package
鈥?No External Components
鈥?Replacement for MAX811/812 and Offers a Lower
Threshold Voltage Option
鈥?Push-Pull RESET Output
鈥?Temperature Range:
- Commercial (C) -40擄C to +85擄C
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Computers
Embedded Systems
Battery Powered Equipment
Critical Microcontroller Power Supply Monitoring
Package Types:
SOT-143
GND 1
TCM811
or
TCM812
4
V
DD
Typical Application Circuit
V
DD
0.1碌F
4
V
DD
PIC
Microcontroller
2
RESET
INPUT
(Active Low)
GND
V
DD
TCM811
3
MR
PUSH
BUTTON
RESET
GND
TCM811
RESET
TCM812
(RESET)
2
3
MR
錚?/div>
2002 Microchip Technology Inc.
DS21615B-page 1

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