TC1270 MICROCHIP [Microchip Technology], TC1270 Datasheet

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TC1270

Manufacturer Part Number
TC1270
Description
4-Pin ?P Reset Monitors
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet

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Features
• Precision V
• Manual Reset Input
• 140msec Minimum RESET, RESET Output
• RESET Output Valid to V
• Low 7µA Supply Current
• V
• Small 4-Pin SOT-143 Package
• No External Components
• Replacement for MAX811/812 and Offers a Lower
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
©
*Custom thresholds available, contact factory.
TC1270xERC
TC1271xERC
and 5.0V Nominal Supplies
Duration
Threshold Voltage Option
Part Number
2002 Microchip Technology Inc.
CC
below)
Transient Immunity
Suffix*
M
R
L
T
S
F
CC
Monitor for 1.8V, 2.7V, 3.0V, 3.3V
4-Pin SOT-143
4-Pin SOT-143
Package
Reset V
CC
= 1.0V (TC1270)
CC
4.63
4.38
3.08
2.93
2.63
1.75
Threshold (V)
-40°C to +85°C
-40°C to +85°C
Temp. Range
4-Pin µP Reset Monitors
TC1270/TC1271
Package Type
General Description
The TC1270 and TC1271 are cost-effective system
supervisor circuits designed to monitor V
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 20µsec (4µsec
for F version) of V
threshold. RESET is maintained active for a minimum
of 140msec after V
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
devices are available in a 4-Pin SOT-143 package.
The TC1270/TC1271 devices are optimized to reject
fast transient glitches on the V
current of 7µA (V
suitable for battery powered applications.
Typical Operating Circuit
V
CC
TC1271 (RESET)
Button
Push-
TC1270 RESET
MR
GND
TC1270
CC
GND
CC
CC
V
CC
RESET
falling through the reset voltage
rises above the reset threshold.
= 3.3V) makes these devices
2
1
4-Pin SOT-143
TC1270
TC1271
CC
line. Low supply
DS21381B-page 1
RESET
Input
(Active Low)
CC
4
3
Processor
CC
= 1V. Both
GND
V
V
MR
in digital
CC
CC

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TC1270 Summary of contents

Page 1

... The TC1271 has an active-high RESET output while -40°C to +85°C the TC1270 has an active-low RESET output. The output of the TC1270 is valid down to V devices are available in a 4-Pin SOT-143 package. The TC1270/TC1271 devices are optimized to reject Threshold (V) fast transient glitches on the V current of 7µ ...

Page 2

... Production testing done +25°C, over temperature limits ensured by design RESET output for TC1270, RESET output for TC1271. DS21381B-page 2 *Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied ...

Page 3

... RESET Output Voltage High OH (TC1270) Note 1: Production testing done +25°C, over temperature limits ensured by design RESET output for TC1270, RESET output for TC1271. 2002 Microchip Technology Inc. © TC1270/TC1271 = 3.3V for T/S versions for R version +25°C. (Note 1). ...

Page 4

... The descriptions of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE Pin No. Symbol (SOT-143-4) 1 GND Ground. 2 RESET RESET output remains low while V (TC1270) 140msec min. after V 2 RESET RESET output remains high while V (TC1271) 140msec min. after Manual reset input generates a reset when MR is below Supply voltage ...

Page 5

... This can be avoided by adding a 4.7 kΩ resistor in series with the output of the TC1270/TC1271 (Figure 3-3). If there are other components in the system which require a reset signal, they should be buffered so as not to load the reset line. If the other components are required to follow the reset I/O of the µ ...

Page 6

... TC1270/TC1271 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

... Package Marking Information & = part number code + temperature range 1 2 (two-digit code) Part Number (V) TC1270LERC 4.63 TC1270MERC 4.38 TC1270TERC 3.08 TC1270SERC 2.93 TC1270RERC 2.63 TC1270FERC 1.75 5.2 Package Dimensions 4-Pin SOT-143 .098 (2.50) .083 (2.10) .040 (1.02) .031 (0.79) .004 (0.10) .001(0.02) 2002 Microchip Technology Inc. © TC1270/TC1271 Part Number TC1271LERC TC1271MERC TC1271TERC ...

Page 8

... TC1270/TC1271 NOTES: DS21381B-page 8 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. TC1270/TC1271 DS21381B-page9 ...

Page 10

... TC1270/TC1271 NOTES: DS21381B-page10  2002 Microchip Technology Inc. ...

Page 11

... Microchip. No licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. 2002 Microchip Technology Inc. © TC1270/TC1271 Trademarks The Microchip name and logo, the Microchip logo, FilterLab microID, MPLAB, PIC, PICmicro, PICMASTER, ...

Page 12

W ORLDWIDE AMERICAS Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: 480-792-7627 Web Address: http://www.microchip.com Rocky Mountain 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7966 Fax: 480-792-7456 Atlanta 500 Sugar Mill Road, ...

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