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Details for TC1232EPA by Microchip Technology
TC1232
TC1232EPA
Buy Directly from Microchip Technology Inc (170 in stock) $1.4100
Microprocessor Monitor
TC1232EPA image

TC1232EPA by Microchip Technology

Microprocessor Monitor
Features
Precision Voltage Monitor: Adjustable +4.5V or +4.75V
Reset Pulse Width: 250 msec minimum
No External Components
Adjustable Watchdog Timer: 150msec, 600msec or 1.2sec
Operating Voltage 4.0V to 5.5V
Debounced Manual Reset Input for External Override
Description
TC1232 is a fully-integrated processor supervisor. 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 TC1232 holds the processor in the reset state for a minimum of 250msec after VCC is within tolerance to ensure a stable system start-up. Microprocessor sanity is monitored by the on-board watchdog circuit. The microprocessor must provide a periodic low-going signal on the ST input. Should the processor fail to supply this signal within the selected time-out period (150msec, 600msec or 1200msec), an out-of-control processor is indicated and the TC1232 issues a processor reset as a result. The outputs of the TC1232 are immediately driven active when the PB input is brought low by an external push-button switch or other electronic signal. When connected to a push-button switch, the TC1232 provides contact debounce. The TC1232 is packaged in a space-saving 8-pin plastic DIP or SOIC package and requires no external components.
Specifications
Product Type:
Supervisor
Watchdog Timer:
Yes
Manual Reset:
Yes
Operating Temp. Range (°C):
-40 to 85
Vcc Range (V):
4.5 - 5.5
Nominal Reset Voltage (V):
4.5, 4.75
Reset Type:
Active Low/High or High/Low
Output:
Dual Output Open-Drain and/or Push-Pull
Typical Reset Pulse Width (ms):
610
Typical Supply Current (µA):
50
Temperature Range:
-40C to +85C
Alternate Descriptions
MICROPROCESSOR-MPU MONITOR, 50 uA, 5.5V, 8-DIP; Threshold Voltage:4.37V; No. of Supervisors / Monitors:1Monitors; Supply Voltage Min:4V; Supply Voltage Max:5.5V; Reset Type:Active-High, Active-Low; Digital IC Case:DIP; Packaging:EachRoHS Compliant: Yes Newark Electronics
Processor Supervisor 4.62V/4.37V 4.5V to 4.75V 8-Pin PDIP Avnet America
Microprocessor Monitor Microchip Technology Inc
Microchip TC1232EPA,Processor Supervisor 4.5 to 4.75V,WDT,Reset Input,8-Pin PDIP Allied Electronics & Automation
TC1232 Series 4.37 V 250 ms Fully Integrated Processor Supervisor - DIP-8 Future Electronics
Engineer Comments

Looking after microcontrollers sometimes requires more than a simple voltage lockout. In this case, the Microchip TC1232EPA is a worthy alternative.

The most important customization option is the voltage tolerance level, which can be set to be either five or 10%. In addition to that, you can also customize the watchdog timer to wait either 150, 600 or even 1200 ms.

When using the TC1232 with modern microcontrollers, a small issue must be kept in mind: the part is available in DIP and SOIC housings, but sadly is not available in a version intended for 3.3 V systems - if you want to use the TC1232, 5V is mandatory.

While the TC1232EPA various input lines sound enticing to a tinker trying to configure the part using GPIO lines, avoid this at all expense. In addition to that, beware the well-known watchdog timer issue list found at http://www.ganssle.com/watchdogs.htm - they also apply to TC1232EPA watchdog timer applications.

Tam Hanna
Details for TC1232EPA by Microchip Technology
TC1232
TC1232EPA
Buy Directly from Microchip Technology Inc (170 in stock) $1.4100
IC MONITOR MPU 4.5V 8-DIP
TC1232EPA image

TC1232EPA by Microchip Technology

IC MONITOR MPU 4.5V 8-DIP
Features
150 msec, 600 msec or 1.2 sec
Adjustable +4.5V or +4.75V
Adjustable Watchdog Timer
Debounced Manual Reset Input for External
No External Components
Operating Voltage 4.0V to 5.5V
Reset Pulse Width u2013 250 msec minimum
Part Information
TC1232EPA image
RoHS Compliant
Description
The TC1232 is a fully-integrated processor supervisor that provides three important functions to safeguard processor sanity: precision power on/off reset control, watchdog timer and external reset override. On power-up, the TC1232 holds the processor in the reset state for a minimum of 250 msec after VCC is within tolerance to ensure a stable system start-up. Microprocessor sanity is monitored by the onboard watchdog circuit. The microprocessor must provide a periodic low-going signal on the ST input. Should the processor fail to supply this signal within the selected time-out period (150 msec, 600 msec or 1200 msec), an out-of-control processor is indicated and the TC1232 issues a processor reset as a result. The outputs of the TC1232 are immediately driven active when the PB input is brought low by an external push button switch or other electronic signal. When connected to a push button switch, the TC1232 provides contact debounce. The TC1232 is packaged in a space-saving 8-Pin PDIP or SOIC package, a 16-Pin SOIC (wide) package and requires no external components.
Specifications
Threshold Voltage:
4.62V
No. of Supervisors / Monitors:
1Monitors
Supply Voltage Min:
4V
Supply Voltage Max:
5.5V
Reset Type:
Active-Low Open-Drain
Digital IC Case:
DIP
No. of Pins:
8Pins
Delay Time:
250ms
Operating Temperature Min:
-40°C
Operating Temperature Max:
85°C
Product Range:
-
Automotive Qualification Standard:
-
RoHS Phthalates Compliant:
Yes
MSL:
-
SVHC:
No SVHC (27-Jun-2018)
Base Number:
1232
Operating Temperature Range:
-40°C to +85°C
Supply Current:
50µA
Supply Voltage Range:
4V to 5.5V
Alternate Descriptions
MICROPROCESSOR-MPU MONITOR, 50 uA, 5.5V, 8-DIP; Threshold Voltage:4.37V; No. of Supervisors / Monitors:1Monitors; Supply Voltage Min:4V; Supply Voltage Max:5.5V; Reset Type:Active-High, Active-Low; Digital IC Case:DIP; Packaging:EachRoHS Compliant: Yes Newark Electronics
Processor Supervisor 4.62V/4.37V 4.5V to 4.75V 8-Pin PDIP Avnet America
Microprocessor Monitor Microchip Technology Inc
Microchip TC1232EPA,Processor Supervisor 4.5 to 4.75V,WDT,Reset Input,8-Pin PDIP Allied Electronics & Automation
TC1232 Series 4.37 V 250 ms Fully Integrated Processor Supervisor - DIP-8 Future Electronics
Engineer Comments

Looking after microcontrollers sometimes requires more than a simple voltage lockout. In this case, the Microchip TC1232EPA is a worthy alternative.

The most important customization option is the voltage tolerance level, which can be set to be either five or 10%. In addition to that, you can also customize the watchdog timer to wait either 150, 600 or even 1200 ms.

When using the TC1232 with modern microcontrollers, a small issue must be kept in mind: the part is available in DIP and SOIC housings, but sadly is not available in a version intended for 3.3 V systems - if you want to use the TC1232, 5V is mandatory.

While the TC1232EPA various input lines sound enticing to a tinker trying to configure the part using GPIO lines, avoid this at all expense. In addition to that, beware the well-known watchdog timer issue list found at http://www.ganssle.com/watchdogs.htm - they also apply to TC1232EPA watchdog timer applications.

Tam Hanna