DS1814BR-10+T&R

Series:	MicroMonitor™
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Push-Pull
Reset:	Active High/Active Low
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	4.375V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	SOT-23-5
Base Part Number:	DS1814

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Introduction

The DS1814BR-10+T&R is a state-of-the-art supervisory IC from Texas Instruments. The device is designed to provide supervision and monitoring of power supplies and other critical signals. It offers several types of output configurations and detects variations in power supply voltage, process variation, current, temperature, and other similar conditions.

Applications

The DS1814BR-10+T&R can be used in a variety of applications. It is ideal for a wide range of consumer, consumer medical, industrial and automotive applications. It is especially useful for applications such as server and network protection, disk drive, code storages, graphics and video controllers, and consumer systems requiring high-reliability solutions.It can also be used in chemical and petrochemical applications, as in industrial and process safety systems, and as a backup/protection in mission-critical applications.

Operating Modes

The DS1814BR-10+T&R provides three operating modes: manual-reset, timed-reset and level-sensitive reset. In the manual reset mode, the system waits for an active-high or active-low voltage input to trigger an initial reset. The timed reset mode is used when an initial reset is not required, and the device instead monitors the levels of the monitored voltages over time. Finally, the level-sensitive reset mode allows the DS1814BR-10+T&R to reset the system when a pre-determined voltage level is exceeded or dropped below the specified limits.

Features

The DS1814BR-10+T&R has several features geared towards high-reliability and safe operation, including a selectable alarm level, a wide operating supply voltage of 1.65V to 5.25V and a maximum input voltage of 10V. It also features an adjustable reset output voltage, a low power consumption of 4mA, and a low-profile package. Additionally, it has an inherent watchdog circuit and an internal pull-up resistor.

Working Principle

The DS1814BR-10+T&R works by monitoring the supply voltage, current, temperature, and other conditions. Depending on the operating mode selected, it will then trigger either an alarm or reset according to certain thresholds. When the monitored conditions are within the determined range, the device will remain in a normal, inactive state.Due to its adjustable reset output voltage, the DS1814BR-10+T&R can be used to provide either a main system reset or a partial reset. When a reset occurs, the reset output will indicate this condition via deactivating the reset output pin. The reset time can be adjusted from 250μs to 500ms depending upon the application. In terms of power consumption, the DS1814BR-10+T&R has a low power requirement of 4mA when in operation. Finally, the device has built-in overvoltage protection ensuring total system safety.

Conclusion

The DS1814BR-10+T&R is a powerful supervisory IC from Texas Instruments designed for high-reliability and safe operation in a variety of applications. It provides three operating modes, manual-reset, timed-reset, and level-sensitive reset, as well as adjustable reset output voltage, selectable alarm levels, a wide operating supply voltage of 1.65V to 5.25V, and built-in overvoltage protection. Additionally, it features a low power requirement of 4mA and a low-profile package. Not only is it an essential component of mission-critical applications, but it is also suitable for a wide range of other scenarios.

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