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TC1271TERC Datasheet

  • TC1271TERC

  • 4-Pin レP Reset Monitors

  • 468.74KB

  • 12頁

  • MICROCHIP   MICROCHIP

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TC1270/TC1271
4-Pin
碌P
Reset Monitors
Features
鈥?Precision V
CC
Monitor for 1.8V, 2.7V, 3.0V, 3.3V
and 5.0V Nominal Supplies
鈥?Manual Reset Input
鈥?140msec Minimum RESET, RESET Output
Duration
鈥?RESET Output Valid to V
CC
= 1.0V (TC1270)
鈥?Low 7碌A(chǔ) Supply Current
鈥?V
CC
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
Package Type
4-Pin SOT-143
4
V
CC
GND
1
TC1270
TC1271
TC1270 RESET
TC1271 (RESET)
2
3
MR
General Description
The TC1270 and TC1271 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. 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 (4碌sec
for F version) of V
CC
falling through the reset voltage
threshold. RESET is maintained active for a minimum
of 140msec after V
CC
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 V
CC
= 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 V
CC
line. Low supply
current of 7碌A(chǔ) (V
CC
= 3.3V) makes these devices
suitable for battery powered applications.
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
TC1270xERC
TC1271xERC
Package
4-Pin SOT-143
4-Pin SOT-143
Temp. Range
-40擄C to +85擄C
-40擄C to +85擄C
NOTE:
鈥渪鈥?denotes a suffix for VCC threshold (see table
below)
Suffix*
L
M
T
S
R
F
Reset V
CC
Threshold (V)
4.63
4.38
3.08
2.93
2.63
1.75
Typical Operating Circuit
V
CC
V
CC
V
CC
Processor
MR
Push-
Button
RESET
RESET
Input
(Active Low)
GND
*Custom thresholds available, contact factory.
TC1270
GND
2002 Microchip Technology Inc.
DS21381B-page 1
漏

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