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TC1277 Datasheet

  • TC1277

  • 3-Pin Reset Monitors for 3.3V Systems

  • 466.05KB

  • 12頁(yè)

  • MICROCHIP   MICROCHIP

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TC1275/TC1276/TC1277
3-Pin Reset Monitors for 3.3V Systems
Features
鈥?Precision V
CC
Monitor for 3.3V Systems
鈥?100msec Minimum RESET, RESET Output
Duration
鈥?Output Valid to V
CC
= 1.2V
鈥?V
CC
Transient Immunity
鈥?Small 3-Pin SOT-23B Package
鈥?No External Components
General Description
The TC1275/TC1276/TC1277 are cost-effective
system supervisor circuits designed to monitor V
CC
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碌sec of V
CC
falling through the reset voltage threshold. RESET is
maintained active for a minimum of 100msec after V
CC
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 V
CC
= 1.2V. The
TC1277 is valid down to V
CC
= 1.8V. All three devices
are available in a 3-Pin SOT-23B package.
The TC1275/TC1276/TC1277 devices are optimized to
reject fast transient glitches on the V
CC
line.
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Computers
Embedded Systems
Battery Powered Equipment
Critical
碌P
Power Supply Monitoring
Device Selection Table
Part
Number
TC1275-xENB
TC1276-xENB
TC1277-xENB
Order
Complimentary
Open Drain
Complimentary
Package
3-Pin SOT-23B
3-Pin SOT-23B
3-Pin SOT-23B
Temp.
Range
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
Typical Operating Circuit
V
CC
2
V
CC
1
RESET
V
CC
Processor
RESET
Input
NOTE:
鈥渪鈥?denotes a suffix for V
CC
threshold (see table below).
Suffix
5
10
20
Reset V
CC
Threshold (V)
3.06
2.88
2.55
TC1275
GND
3
GND
Package Type
3-Pin SOT-23B
RESET
*(RESET)
1
TC1275-xENB
TC1276-xENB
TC1277-xENB
V
CC
2
3
GND
NOTE:
3-Pin SOT-23B is equivalent to JEDEC TO-236
*( ) is for TC1277
2002 Microchip Technology Inc.
DS21383B-page 1
漏

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