S-80143BNMC-JG4T2G

Series:	S-801
Packaging:	Tape & Reel (TR)
Part Status:	Not For New Designs
Type:	Voltage Detector
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	65 ms Minimum
Voltage - Threshold:	4.3V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	SOT-23-5

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Introduction

PMIC - Supervisors are one of the main components of the system board. PMIC Supervisors are dedicated integrated circuits that monitor and adjust system conditions to ensure robust functionality of boards. One example of this type of integrated circuit is the S-80143BNMC-JG4T2G. This application note will discuss the application field and working principle of this integrated circuit.

Application Field

The S-80143BNMC-JG4T2G is a 3.3V to 15V, 0.5A P-Channel FET Supervisor with a programmable reset threshold and a high-accuracy reset timer. This integrated circuit is ideal for applications requiring a reset signal over a wide voltage range and/or a high-accuracy timer. Common applications for this integrated circuit include system monitoring, microprocessor/microcontroller reset, and systems with high noise immunity.

Working Principle

The S-80143BNMC-JG4T2G supervisor is a low-power device that monitors the power supply voltage and sends a reset signal when the voltage drops below a programmable threshold. The supervisor also includes a high-accuracy timer that is used to send a reset signal after a pre-programmed amount of time.The integrated circuit is set with two independent comparators. The lower comparator is used to monitor the input voltage and detect when the voltage drops below the programmed reset threshold. When the voltage drops below the threshold, the supervisor sends a reset signal that is used to reset the system.The upper comparator is used to monitor the reset duration. If the reset signal is still present after the programmed duration, the supervisor will assert a “reset timeout” signal. This signal can be used to shut down the system if the reset signal has become stuck (for example, due to a short circuit).The S-80143BNMC-JG4T2G supervisor also includes several other features to ensure robust operation. This includes a Power-On Reset (POR) function that keeps the reset signal asserted until the supply voltage rises above a certain threshold. It also includes an active-high reset indication output that can be used to indicate the state of the reset signal.

Conclusion

The S-80143BNMC-JG4T2G supervisor is a low-power, programmable integrated circuit that provides a reset signal when the system voltage drops below a preset threshold and/or after a programmable amount of time. This integrated circuit is ideal for applications requiring a reset signal over a wide voltage range and/or a high-accuracy timer. Its features make it an ideal choice for system monitoring, microprocessor/microcontroller reset, and systems with high noise immunity.

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