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TC1277-5ENB Datasheet(PDF) 1 Page - Microchip Technology

Part # TC1277-5ENB
Description  3-Pin Reset Monitors for 3.3V Systems
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC1277-5ENB Datasheet(HTML) 1 Page - Microchip Technology

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© 2007 Microchip Technology Inc.
DS21383C-page 1
TC1275/TC1276/TC1277
Features
• Precision VCC Monitor for 3.3V Systems
• 100 ms Minimum RESET, RESET Output
Duration
• Output Valid to VCC = 1.2V
•VCC Transient Immunity
• Small 3-Pin SOT-23 Package
• No External Components
Applications
• Computers
• Embedded Systems
• Battery Powered Equipment
• Critical µP Power Supply Monitoring
Device Selection Table
NOTE: “x” denotes a suffix for VCC threshold (see table below).
Package Type
General Description
The
TC1275/TC1276/TC1277
are
cost-effective
system supervisor circuits designed to monitor VCC in
digital systems and provide a reset signal to the host
processor when necessary. No external components
are required.
The reset output is driven active within 20 µs of VCC
falling through the reset voltage threshold. RESET is
maintained active for a minimum of 100 ms after VCC
rises above the reset threshold. The TC1277 has an
active-high RESET output while the TC1275 and
TC1276 have an active-low RESET output. TC1275
and TC1277 each have a complimentary output while
the TC1276 has an open drain output. The output of the
TC1275 and TC1276 is valid down to VCC = 1.2V. The
TC1277 is valid down to VCC = 1.8V. All three devices
are available in a 3-Pin SOT-23 package.
The TC1275/TC1276/TC1277 devices are optimized to
reject fast transient glitches on the VCC line.
Typical Operating Circuit
Part
Number
Order
Package
Temp.
Range
TC1275-xENB Complimentary
3-Pin SOT-23
-40°C to +85°C
TC1276-xENB
Open-Drain
3-Pin SOT-23
-40°C to +85°C
TC1277-xENB Complimentary
3-Pin SOT-23
-40°C to +85°C
Suffix
Reset VCC Threshold (V)
53.06
10
2.88
20
2.55
VCC
RESET
*(RESET)
GND
TC1275
TC1276
TC1277
1
2
3
*( ) is for TC1277
3-Pin SOT-23
TC1275
VCC
VCC
VCC
RESET
RESET
Input
GND
GND
Processor
1
2
3
3-Pin Reset Monitors for 3.3V Systems
Obsolete Device


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