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TC32MCZB データシート(PDF) 1 Page - TelCom Semiconductor, Inc

部品番号 TC32MCZB
部品情報  ECONOMONITOR - 3-PIN SYSTEM SUPERVISOR WITH POWER SUPPLY MONITOR AND WATCHDOG
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メーカー  TELCOM [TelCom Semiconductor, Inc]
ホームページ  http://www.telcom-semi.com
Logo TELCOM - TelCom Semiconductor, Inc

TC32MCZB データシート(HTML) 1 Page - TelCom Semiconductor, Inc

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TELCOM SEMICONDUCTOR, INC.
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ECONOMONITOR™ – 3-PIN SYSTEM SUPERVISOR WITH POWER
SUPPLY MONITOR AND WATCHDOG
VDD
VREF2
VREF1
TC32M
WATCHDOG
TIMER
RS
GND
∆V
DETECTOR
DELAY
TIMER
TC32M
FEATURES
s
Incorporates the Functionality of the Industry
Standard TC1232 (Processor Monitor, Watchdog
and Manual Override RESET Controller) into a
Small, Lower Cost Package
s
Guards Against Unstable Processor Operation
Resulting from Power "Brown-Out"
s
Automatically Halts and Restarts an Out-of-
Control Microprocessor
s
Output can be Wire-ORed, or Hooked to Manual
RESET Push-button Switch
s
Space-Saving 3-Pin TO-92 or SOT-223 Package
APPLICATIONS
s
All Microprocessor-Based Systems
s
Battery Powered Computers and Controllers
s
Automotive Systems
s
Intelligent Instruments
s
Critical Processor Monitoring
s
Embedded Controllers
ORDERING INFORMATION
Temperature
Part No.
Package
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
PIN CONFIGURATIONS
1
1
2
4
3
23
GND
TC32MCDB
TC32MEDB
TC32MCZB
TC32MEZB
VDD
VDD
RS
FUNCTIONAL BLOCK DIAGRAM
TO-92
SOT-223
TYPICAL OPERATING CIRCUIT
TC32M-2 9/26/96
5V
RESET
PO.1
RESET
MICRO-
CONTROLLER
R2,10k
MICROCONTROLLER EXAMPLE
RS
TC32M
R1, 10k
GENERAL DESCRIPTION
The TC32M is a fully-integrated processor supervisor in
a 3-pin package. It provides three important functions 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 500msec after VDD is within
tolerance to ensure a stable system start-up. Microproces-
sor 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 timeout period (typically 700msec), 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 configu-
ration.


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