TC1277 Microchip Technology, TC1277 Datasheet

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TC1277

Manufacturer Part Number
TC1277
Description
(TC1275 / TC1276 / TC1277) 3-Pin Reset Monitors for 3.3V Systems
Manufacturer
Microchip Technology
Datasheet
Features
• Precision V
• 100msec Minimum RESET, RESET Output
• Output Valid to V
• V
• Small 3-Pin SOT-23B 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 V
Package Type
©
TC1275-xENB
TC1276-xENB
TC1277-xENB
Duration
2002 Microchip Technology Inc.
NOTE: 3-Pin SOT-23B is equivalent to JEDEC TO-236
*( ) is for TC1277
Number
CC
Part
*(RESET)
Transient Immunity
RESET
Suffix
10
20
V
5
CC
CC
Complimentary 3-Pin SOT-23B
Complimentary 3-Pin SOT-23B
Open Drain
Monitor for 3.3V Systems
1
2
Order
3-Pin SOT-23B
CC
TC1275-xENB
TC1276-xENB
TC1277-xENB
3-Pin Reset Monitors for 3.3V Systems
= 1.2V
CC
Reset V
threshold (see table below).
3-Pin SOT-23B
Package
CC
3
3.06
2.88
2.55
Threshold (V)
TC1275/TC1276/TC1277
GND
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
Range
Temp.
General Description
The
system supervisor circuits designed to monitor V
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 20µsec of V
falling through the reset voltage threshold. RESET is
maintained active for a minimum of 100msec after V
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
TC1277 is valid down to V
are available in a 3-Pin SOT-23B package.
The TC1275/TC1276/TC1277 devices are optimized to
reject fast transient glitches on the V
Typical Operating Circuit
V
CC
TC1275/TC1276/TC1277
TC1275
GND
3
2
V
CC
RESET
CC
1
= 1.8V. All three devices
are
CC
DS21383B-page 1
CC
line.
RESET
Input
cost-effective
Processor
= 1.2V. The
GND
V
CC
CC
CC
CC
in

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TC1277 Summary of contents

Page 1

... The reset output is driven active within 20µsec of V falling through the reset voltage threshold. RESET is maintained active for a minimum of 100msec after V 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 ...

Page 2

... All voltages referenced to ground. ≥ 2.7 volts. 2: Measured with Measured with RESET output open for TC1275/TC1276; measured with RESET output open for TC1277 5µsec 1kΩ external resistor may be required in some applications for proper operation of the microprocessor reset control circuit when using the TC1276 ...

Page 3

... V TC1275 is complimentary. The output stage of the TC1276 is open drain. 1 RESET (TC1277) RESET output remains high while V 200msec (100msec min.) after V TC1277 is complimentary Supply voltage (1.2V to 5.5V TC1275 and TC1276, 1.8V to 5.5V TC1277 GND Ground. 2002 Microchip Technology Inc. © TC1275/TC1276/TC1277 Description ...

Page 4

... TC1275/TC1276/TC1277 3.0 APPLICATIONS INFORMATION 3.1 Operation – Power Monitor The TC1275/TC1276/TC1277 provide the function of detecting out-of-tolerance power supply conditions and warning a processor-based system of impending power failure. When V is detected as out-of- CC tolerance, the RESET signal is asserted. On power-up, RESET is kept active for approximately 200msec after the power supply has reached the selected tolerance ...

Page 5

... This resistor value, though not critical, should be chosen such that it does not appreciably load RESET under normal operation (100kΩ will be suitable for most applications). Similarly, a pull-up resistor required for the TC1277 to CC ensure a valid high RESET for V below 1.8V. CC 2002 Microchip Technology Inc. © ...

Page 6

... TC1275/TC1276/TC1277 4.0 TYPICAL CHARACTERISTICS Note: The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e ...

Page 7

... Right Side Up) Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) 3-Pin SOT-23B 2002 Microchip Technology Inc. © TC1275/TC1276/TC1277 TC1276 (V) 2.55 2.88 3.06 TC1277 (V) 2.55 2.88 3.06 ex: 1275- represents year and quarter code 3 represents production lot ID code 4 User Direction of Feed P Pitch (P) ...

Page 8

... TC1275/TC1276/TC1277 5.3 Package Dimensions 3-Pin SOT-23B .104 (2.64) .083 (2.10) .040 (1.02) .031 (0.79) .004 (0.10) .001 (0.02) DS21383B-page 8 .021 (0.54) .015 (0.37) .055 (1.40) .047 (1.20) .024 (0.60) .017 (0.44) .120 (3.05) .105 (2.67) 8 MAX. .010 (0.25) .005 (0.13) .081 (2.05) .070 (1.78) Dimensions: inches (mm) .007 (0.18) .003 (0.08) 2002 Microchip Technology Inc. © ...

Page 9

... The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products.  2002 Microchip Technology Inc. TC1275/TC1276/TC1277 DS21383B-page9 ...

Page 10

... TC1275/TC1276/TC1277 NOTES: DS21383B-page10  2002 Microchip Technology Inc. ...

Page 11

... Serialized Quick Turn Programming (SQTP service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2002, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system certification for its worldwide headquarters, ...

Page 12

... Tel: 81-45-471- 6166 Fax: 81-45-471-6122 Korea Microchip Technology Korea 168-1, Youngbo Bldg. 3 Floor Samsung-Dong, Kangnam-Ku Seoul, Korea 135-882 Tel: 82-2-554-7200 Fax: 82-2-558-5934 Singapore Microchip Technology Singapore Pte Ltd. 200 Middle Road #07-02 Prime Centre Singapore, 188980 Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan Microchip Technology Taiwan 11F-3, No. 207 ...

Page 13

... This datasheet has been download from: www.datasheetcatalog.com Datasheets for electronics components. ...

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