TL7715ACDE4

Series:	--
Packaging:	Tube
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Complementary
Reset:	Active High/Active Low
Reset Timeout:	1 µs Maximum Propagation Delay
Voltage - Threshold:	13.5V
Operating Temperature:	0°C ~ 70°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	TL7715A

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Introduction

TL7715ACDE4 is an integrated power monitor and supervisor IC with a watchdog timer and resettable signal output. It is a non-volatile device; it has the ability to store settings to a register and will maintain those settings for the duration of time. This circuit is intended for use on systems such as personal computers, peripherals, and modems, where the reliability and power management is critical. The TL7715ACDE4 can be used to detect undervoltage and overvoltage conditions, monitor power supply voltage levels, display dynamic supply voltage information, adjust load start-up voltage thresholds, and generation of reset signals to protect the system from loss of power or from improper power supply conditions.

Application of the TL7715ACDE4

The TL7715ACDE4 can be applied in a variety of power monitoring and controlling applications. It is ideal for controlling power-on and power-off sequences of personal computers, consumer devices and modems. The TL7715ACDE4 is also suitable for generating a reset signal if the power supply voltage drops below a predetermined threshold level or if the power supply voltage exceeds the over-voltage threshold level. The TL7715ACDE4 also features an adjustable Watchdog Timer function that can be set to detect runaway conditions in the system processor.

Working Principle of TL7715ACDE4

There are mainly three sections in the TL7715ACDE4, which are the voltage monitor, the Watchdog Timer and the Reset Output. The Voltage Monitor section is responsible for detecting when power supply voltage levels drop below a predetermined threshold or exceeds a predetermined over-voltage threshold. This section also adjusts load start-up voltage thresholds for improved power supply performance.The Watchdog Timer is an on-chip oscillator that generates a periodic reset signal. This signal provides a "last resort" reset to the system if the processor fails to execute instructions. It is also used to detect runaway conditions in the processor during software debugging.The Reset Output is an active low output that provides a signal to the system logic when the monitored power supply rails fall outside of the rated operating range. The Reset Output can also generate a periodic reset if enabled with the Watchdog Timer.

Conclusion

The TL7715ACDE4 is a highly integrated power monitor and supervisor IC with a watchdog timer and reset output. This integrated circuit can be used to accurately detect and monitor power supply voltage levels as well as generate reset signals when the power supply levels fall outside of the conditions set by the user. Moreover, the Watchdog Timer feature allows the TL7715ACDE4 to detect runaway processor conditions and reset the system to prevent further damage. This device is suitable for use in a variety of applications where power management and reliability is critical.

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