TCM811 Microchip Technology, TCM811 Datasheet

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TCM811

Manufacturer Part Number
TCM811
Description
4-Pin Microcontroller Reset Monitors
Manufacturer
Microchip Technology
Datasheet

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Features
• Precision V
• Manual Reset Input
• 140 msec Minimum RESET Output Duration
• RESET Output Valid to V
• Low 6 µA (typ.) Supply Current
• V
• Small 4-Pin SOT-143 Package
• No External Components
• Replacement for MAX811/812 and Offers a Lower
• Push-Pull RESET Output
• Temperature Range:
Applications
• Computers
• Embedded Systems
• Battery Powered Equipment
• Critical Microcontroller Power Supply Monitoring
Typical Application Circuit
M
V
5.0V Nominal Supplies
Threshold Voltage Option
- Commercial (C) -40°C to +85°C
2002 Microchip Technology Inc.
DD
0.1µF
DD
BUTTON
PUSH
Transient Immunity
3
DD
MR
Monitor for 2.0V, 2.8V, 3.0V, 3.3V,
TCM811
GND
V
DD
RESET
4
4-Pin Microcontroller Reset Monitors
DD
2
= 1.0V (TCM811)
Microcontroller
RESET
INPUT
(Active Low)
GND
V
PIC
DD
TCM811/TCM812
General Description
The TCM811 and TCM812 are cost effective system
supervisory circuits designed to monitor V
systems and provide a reset signal to the host control-
ler 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 µsec (5 µsec
for F version) of V
threshold. RESET is maintained active for a minimum
of 140 msec after V
The TCM812 has an active high RESET output while
the TCM811 has an active low RESET output. The out-
put of the TCM811 is valid down to V
devices are available in a 4-Pin SOT-143 package,
specified with a temperature range of -40°C to +85°C.
The TCM811/TCM812 are optimized to reject fast tran-
sient glitches on the V
6 µA (V
powered applications.
Package Types:
SOT-143
TCM812 (RESET)
TCM811 RESET
DD
= 3.3V) makes these devices ideal for battery
DD
GND 1
DD
falling through the reset voltage
rises above the reset threshold.
DD
2
line. A low supply current of
DS21615B-page 1
DD
4
3
DD
= 1V. Both
in digital
V
MR
DD

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TCM811 Summary of contents

Page 1

... RESET is maintained active for a minimum of 140 msec after V The TCM812 has an active high RESET output while the TCM811 has an active low RESET output. The out- put of the TCM811 is valid down to V devices are available in a 4-Pin SOT-143 package, specified with a temperature range of -40°C to +85°C. ...

Page 2

... MR Minimum Pulse Width Glitch Immunity MR to Reset Propagation t MD Delay Note 1: Production testing done production. DS21615B-page 2 PIN FUNCTION TABLE NAME GND RESET (TCM811 0.3V) DD RESET (TCM812 for R version +25°C. (Note 1) A Min Typ Max Units 1.0 — ...

Page 3

... TH(MAX), DD TCM81_L/M V > TH(MAX) DD TCM81_R/S/T/F TCM811R/S/T only 1.2 mA SINK DD TH MIN TCM811F only 500 µ SINK DD TH MIN TCM811L/M only 3.2 mA SINK DD TH MIN I = 3.2 mA SINK DD TH MIN TCM811R/S/T/F only 500 µA, V > SOURCE DD TH MAX TCM811L/M only; ...

Page 4

... Depending on the current drive capability of the control- ler pin, an indeterminate logic level may result if there is a logic conflict. This can be avoided by adding a 4.7 k resistor in series with the output of the TCM811/ TCM812 (Figure 2-3). 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 ...

Page 5

... TEMPERATURE (˚C) FIGURE 3-2: Power-Down Reset Temperature. 250 245 240 TCM81xR/S/T/F 235 230 225 –40 – TEMPERATURE (˚C) FIGURE 3-3: Power-Up Reset Temperature. 2002 Microchip Technology Inc. TCM811/TCM812 8 TCM81xL/M TCM81xR/S/T/F No Load No Load –40 85 FIGURE 3-4: 50 TCM81xF 100 – ...

Page 6

... TCM811/TCM812 1.0030 1.0020 1.0010 1.0000 0.9990 0.9980 0.9970 0.9960 0.9950 0.9940 –40 – TEMPERATURE (˚C) FIGURE 3-7: Normalized Reset Temperature. DS21615B-page Threshold vs. 2002 Microchip Technology Inc. ...

Page 7

... PACKAGING INFORMATION 4.1 Package Marking Information Part Number TCM811LERC TCM811MERC TCM811TERC TCM811SERC TCM811RERC TCM811FERC TCM812LERC TCM812MERC TCM812TERC TCM812SERC TCM812RERC TCM812FERC Legend: 1 Part Number + temperature range and voltage (two-digit code) 2 Part Number + temperature range and voltage (two-digit code) 3 Year and two-month period code ...

Page 8

... TCM811/TCM812 4.2 Package Dimensions Component Taping Orientation for 4-Pin SOT-143 Devices Device Marking PIN 1 Standard Reel Component Orientation for TR Suffix Device (Mark Right Side Up) Carrier Tape, Number of Components Per Reel and Reel Size: Package Carrier Width (W) 4-Pin SOT-143 8 mm .079 (2.00) .071 (1.80) .098 (2.50) ...

Page 9

... Conferences for products, Development Systems, technical information and more • Listing of seminars and events 2002 Microchip Technology Inc. TCM811/TCM812 Systems Information and Upgrade Hot Line The Systems Information and Upgrade Line provides system users a listing of the latest versions of all of Microchip's development systems software products. ...

Page 10

... Telephone: (_______) _________ - _________ Application (optional): Would you like a reply? Y Device: TCM811/TCM812 Questions: 1. What are the best features of this document? 2. How does this document meet your hardware and software development needs you find the organization of this data sheet easy to follow? If not, why? 4 ...

Page 11

... To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO Device V Temperature DD Range Reset Threshold Device: TCM811: Supervisor Circuit with active-low RESET output TCM812: Supervisor Circuit with active-high RESET output V Reset Threshold 4.63V 4.38V T = 3.08V S = 2.93V ...

Page 12

... TCM811/TCM812 NOTES: DS21615B-page 12 2002 Microchip Technology Inc. ...

Page 13

... Serialized Quick Term 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, design and wafer fabrication facilities in Chandler and Tempe, Arizona in July 1999 ...

Page 14

... 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: 65-334-8870 Fax: 65-334-8850 Taiwan Microchip Technology Taiwan 11F-3, No. 207 ...

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