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TC1270RERCTR Folha de dados(PDF) 1 Page - Microchip Technology

Nome de Peças TC1270RERCTR
Descrição Electrónicos  4-Pin Reset Monitors
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Fabricante Electrônico  MICROCHIP [Microchip Technology]
Página de início  http://www.microchip.com
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© 2007 Microchip Technology Inc.
DS21381D-page 1
TC1270/TC1271
Features:
• Precision VCC Monitor for 1.8V, 2.7V, 3.0V, 3.3V
and 5.0V Nominal Supplies
• Manual Reset Input
• 140 ms Minimum RESET, Reset Output Duration
• RESET Output Valid to VCC = 1.0V (TC1270)
• Low 7 µA Supply Current
•VCC Transient Immunity
• Small 4-Pin SOT-143 Package
• No External Components
• Replacement for MAX811/812 and Offers a Lower
Threshold Voltage Option
Applications:
• Computers
• Embedded Systems
• Battery Powered Equipment
• Critical µP Power Supply Monitoring
Typical Operating Circuit
General Description
The TC1270 and TC1271 are cost-effective system
supervisor circuits designed to monitor VCC in digital
systems and provide a reset signal to the host
processor 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 (4 µs for
F version) of VCC falling through the reset voltage
threshold. Reset is maintained active for a minimum of
140 ms after VCC rises above the reset threshold. The
TC1271 has an active-high RESET output while the
TC1270 has an active-low RESET output. The output
of the TC1270 is valid down to VCC = 1V. Both devices
are available in a 4-Pin SOT-143 package.
The TC1270/TC1271 devices are optimized to reject
fast transient glitches on the VCC line. Low supply
current of 7 µA (VCC = 3.3V) makes these devices
suitable for battery powered applications.
Package Type
TC1270
VCC
VCC
VCC
RESET
Reset
Input
(Active Low)
GND
GND
Processor
MR
Push
Button
VCC
TC1270 RESET
GND
TC1270
TC1271
1
2
TC1271 (RESET)
3
4
MR
4-Pin Reset Monitors


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