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TC32M_13 Datasheet

Download or read online Microchip Technology TC32M_13 ECONOMONITOR™ – 3-Pin System Supervisor with Power Supply Monitor and Watchdog pdf datasheet.



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ECONOMONITOR™ – 3-Pin System Supervisor with
Power Supply Monitor and Watchdog
Features:
• Incorporates the Functionality of the Industry
Standard TC1232 (Processor Monitor, Watchdog
and Manual Override Reset Controller) into a
Small, Lower Cost Package
• Guards Against Unstable Processor Operation
Resulting from Power “Brown-Out”
• Automatically Halts and Restarts an Out-of-
Control Microprocessor
• Output can be Wire-ORed, or Hooked to Manual
Reset Push-button Switch
• Space-Saving 3-Pin TO-92 or SOT-223 Package
Applications:
• All Microprocessor-Based Systems
• Battery Powered Computers and Controllers
• Automotive Systems
• Intelligent Instruments
• Critical Processor Monitoring
• Embedded Controllers
Device Selection Table
Part Number
Package
Temp. Range
TC32MCDB
SOT-223
0°C to +70°C
TC32MCZB
TO-92
0°C to +70°C
TC32MEDB
SOT-223
-40°C to +85°C
TC32MEZB
TO-92
-40°C to +85°C
Package Type
1
2 3
TC32MCZB
TC32MEZB
1
GND
 2001-2012 Microchip Technology Inc.
General Description:
The TC32M is a fully-integrated processor supervisor
in a 3-pin package. It provides three important func-
tions to safeguard processor sanity: precision power
on/off Reset control, Watchdog Timer and external
Reset override.
On power-up, the TC32M holds the processor in the
Reset state for a minimum of 500 msec after V
within tolerance to ensure a stable system start-up.
Microprocessor sanity is monitored by the on-board
Watchdog circuit. The microprocessor must provide a
high-to-low level shift (through an external resistor
divider) on the RS pin of the TC32M. Should the
processor fail to supply this signal within the specified
time-out period (typically 700 msec), an out-of-control
processor is indicated and the TC32M issues a
processor Reset as a result.
The output of the TC32M can be wire-ORed with a
push-button switch (or electronic signal) to override the
TC32M and unconditionally reset the processor. When
connected to a push-button switch, the TC32M
provides contact debounce.
The TC32M is packaged in a space-saving TO-92 or
SOT-223 package. It provides all of the functionality of
the industry standard TC1232 in a smaller, lower cost
configuration.
V
DD
4
TC32MCDB
TC32MEDB
2
3
V
RS
DD
TC32M
is
DD
DS21402D-page 1

Summary of Contents

Page 1

... Package Type TC32MCZB TC32MEZB 1 GND 2001-2012 Microchip Technology Inc. General Description: The TC32M is a fully-integrated processor supervisor in a 3-pin package. It provides three important func- tions to safeguard processor sanity: precision power on/off Reset control, Watchdog Timer and external Reset override. ...

Page 2

... TC32M Functional Block Diagram TC32M V REF1 DV Watchdog Detector Timer V REF2 Delay Timer DS21402D-page 2 Typical Operating Circuit TC32M GND 5V R1, 10 kΩ Microcontroller R2, 10 kΩ PO.1 Reset Reset 2001-2012 Microchip Technology Inc. ...

Page 3

... Note 1: No output load. 2: All voltages referenced to ground. 2001-2012 Microchip Technology Inc. Stresses above those listed under Absolute Maxi- mum 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 4

... In the Input mode, RS connects to a voltage level shift network (typically a resistor divider to V level  The 5V power supply input (SOT-223 only). DD DS21402D-page 4 Description falls below 4.5V nominal. .) The Watchdog Timer is reset when processor causes a voltage applied to RS. STL 2001-2012 Microchip Technology Inc. ...

Page 5

... RS from being strobed within the Watchdog Time-out period. This action typically initiates the processors power-up routine. If the interruption persists, new Reset pulses are generated each time-out period until RS is strobed. This time-out period is typically 700 msec. 2001-2012 Microchip Technology Inc (Min) ...

Page 6

... TC32M as possible to keep the capacitor lead length short. 5V R1, 10 kΩ Decoder R2, 10 kΩ RS TC32M Reset Microprocessor Example t RST V IH Power-Up/Down Reset Timing . Systems with an inordinate DD (such as systems DD Microprocessor Address Reset , V ) STH STL 2001-2012 Microchip Technology Inc. ...

Page 7

... M M ARK ARK F F ACE ACE Seal Tape Back Tape 2001-2012 Microchip Technology Inc. User Direction of Feed P Standard Reel Component Orientation for 713 Suffix Device (Mark Right Side Up) Carrier Width (W) Pitch (P) Part Per Full Reel 4000 User Direction of Feed ...

Page 8

... Typ. .031 (0.80) .024 (0.60) ° 10 Max. .181 (4.60) Typ. .036 (0.91) Min. Dimensions: inches (mm) .500 (12.70) Min. .135 .105 (2.67) (3.43) .095 (2.41) Min. .055 (1.40) .045 (1.14) .013 (0.33) .009 (0.24) .165 (4.19) .125 (3.18) .105 (2.67) .080 (2.03) .018 (0.46) .015 (0.38) Dimensions: inches (mm) 2001-2012 Microchip Technology Inc. ...

Page 9

... REVISION HISTORY Revision D (December 2012) Added a note to each package outline drawing. 2001-2012 Microchip Technology Inc. TC32M DS21402D-page 9 ...

Page 10

... TC32M NOTES: DS21402D-page 10 2001-2012 Microchip Technology Inc. ...

Page 11

... 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. 2001-2012 Microchip Technology Inc TC32M ...

Page 12

... TC32M NOTES: DS21402D-page12 2001-2012 Microchip Technology Inc. ...

Page 13

... PICtail, REAL ICE, rfLAB, Select Mode, SQI, Serial Quad I/O, Total Endurance, TSHARC, UniWinDriver, WiperLock, ZENA and Z-Scale are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. GestIC and ULPP are registered trademarks of Microchip Technology Germany II GmbH & Co. & KG, a subsidiary of Microchip Technology Inc ...

Page 14

... Singapore Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan - Hsin Chu Tel: 886-3-5778-366 Fax: 886-3-5770-955 Taiwan - Kaohsiung Tel: 886-7-213-7828 Fax: 886-7-330-9305 Taiwan - Taipei Tel: 886-2-2508-8600 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 2001-2012 Microchip Technology Inc. 11/27/12 ...

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