DS1834A+

Series:	EconoReset
Packaging:	Tube
Part Status:	Active
Type:	Multi-Voltage Supervisor
Number of Voltages Monitored:	2
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	200 ms Minimum
Voltage - Threshold:	3.3V, 5V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Through Hole
Package / Case:	8-DIP (0.300", 7.62mm)
Supplier Device Package:	8-PDIP
Base Part Number:	DS1834

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Introduction

DS1834A+ is an enhanced version of the DS1834+ Supervisory IC from Dallas Semiconductor. It is designed for precision voltage monitoring, brown-out protection, as well as over-voltage protection. This device can provide critical overvoltage protection, precise undervoltage detection, long detection time delays, power supply sequencing and precise external reset monitoring in a variety of applications. Its capabilities, combined with its very low power consumption, make it an ideal choice for a variety of power management applications.

Application Field

The DS1834A+ is the most versatile Supervisory IC from Dallas Semiconductor. It is suitable for a variety of applications in the field of power management, such as Voltage monitoring and protection, Power supply sequencing, system monitoring, and Reset detection. Voltage Monitoring and Protection: The DS1834A+ features a sophisticated voltage monitoring circuit that can be used to detect supply line undervoltage or overvoltage conditions. It can be used to protect systems from excessive current or voltage by shutting down the system when it is necessary.Power Supply Sequencing: Power supply sequencing is the process of controlling the order in which power supplies are enabled. It is used to ensure system reliability and to prevent damage to components. The DS1834A+ can be used to sequence the power supplies of a system and monitor their voltage levels.System Monitoring: The DS1834A+ can monitor the status of a system and provide an indication of when the system is not running correctly. It can also be used to monitor temperatures, and provide an indication of when the system has exceeded its maximum operating temperature.Reset Detection: The DS1834A+ can be used to detect a system reset and provide an indication of when the system has been reset. This is useful for systems that need to be reset periodically, such as computers and network equipment.

Working Principle

The DS1834A+ operates by monitoring the supply voltage, and if it drops below or exceeds it\'s specified operating range, it will indicate an undervoltage/overvoltage condition. The device features a hysteresis feature that prevents spurious trips and allows for a stable operation. When an undervoltage/overvoltage condition is detected, a reset signal is generated. This reset signal can be used to disable the power supply, or to reset the system.The DS1834A+ also features a power-on delay feature that can be used to sequence the power supplies of a system. This delay prevents the system from turning on too quickly and allows for a period of stabilization before the power supplies are engaged.The DS1834A+ also features an adjustable reset active time that can be programmed to generate a reset pulse of a specific duration. This feature is useful for systems that require a reset pulse of a certain duration. In addition, the DS1834A+ also features an external reset input which can be used to generate a reset pulse when an external device is detected. This feature is useful for systems that require a reset when an external device such as a modem is detected.

Conclusion

The DS1834A+ is a versatile Supervisory IC from Dallas Semiconductor that is designed for precision voltage monitoring, brown-out protection, and over-voltage protection. It is capable of detecting supply line undervoltage or overvoltage conditions, and is suitable for a variety of power management applications. It also features a power-on delay circuit, an adjustable reset active time, and an external reset input. The features of the DS1834A+ make it an ideal choice for power management applications.

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