ASM809LEURF-T

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	--
Reset:	Active Low
Reset Timeout:	140 ms Minimum
Voltage - Threshold:	4.63V
Operating Temperature:	-40°C ~ 105°C (TA)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3

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Introduction to ASM809LEURF-T

The ASM809LEURF-T is an advanced system monitor supervisor device from Microchip. It is designed to minimize customer effort in the system power control design based on its superb features and cost-effective application. This device integrates a typical system controller, comprised of a power-on reset (POR), a low voltage detector (LVD) and a window watchdog. With its extendable features, the ASM809LEURF-T can also be applied to various applications requiring shutdowns or reset functions.

Application Field of ASM809LEURF-T

The ASM809LEURF-T is aimed at the microcontroller, FPGA, and other similar low voltage applications. This device provides a specialized solution for the current operation voltage level to provide early warning and proactive protection. For the application fields, the ASM809LEURF-T can be applied in communication baseband, electronic counter, and automotion equipment, etc.

Communication Baseband

In communication baseband, the ASM809LEURF-T can serve as a watch dog monitor and reset supervisor in the system. This device can detect any abnormal voltage drop or interruption in the data flow, and thus triggers a low voltage reset signal to the microcontroller. The reset will prevent any further data errors and clear the memory from any transient errors. With this effective reset mechanism, the communication baseband can be assured of accurate and stable system operation.

Electronic Counter

In an electronic counter application, high accuracy and precision are imperative for successful system operation. The ASM809LEURF-T can provide accurate and robust system accuracy as it incorporates an adjustable window watchdog. By adjusting the thresholds voltage, the system can be monitored at the precise voltage level and safeguard against out-of-range operations.

Automotion Equipment

In a demanding automotion equipment environment, the ASM809LEURF-T can be the battery protector by monitoring the battery voltage and proactively triggering a warning signal or shut down mechanism when the battery threshold is exceeded. This protocol can be adjusted and customized to suit customer specific applications. Additionally, this device can provide power and reset control in robotics and other motor control applications by monitoring the motor temperature and speed.

Working Principle of ASM809LEURF-T

The ASM809LEURF-T is a power reset signal device, which works on an integrated circuit with the following typical powering parameters: supply voltage range: 1.8V to 5.2V; detect and reset voltage ranges: 0.4V to 4.6V. It has two operation modes, manual and automatic. In manual operation mode, the desire low voltage level can either be set from setting pin or via I2C register. In automatic mode, the voltage levels are set automatically when the device is powered up. The reset pulse is generated once the input power voltage falls below the preset low voltage level. In terms of the power-on reset (POR) protocol, it is input power on point, normally against the ground, which can hold the reset when the power is applied. This protocol will protect the chip against any unknown conditions in the system power control design. The window watchdog is an adjustable low voltage detection range. It can be configured to monitor the input power voltage by setting the window comparator within the specified voltage range. The reset pulse will be generated to reset the system when the voltage is outside its error range.The low voltage detection is an adjustable low voltage detection range. It can be configured to detect the input power voltage by setting the window comparator within the specified voltage range. The device will provide a windowed or a reset signal when the voltage is out of range.

Conclusion

In conclusion, the ASM809LEURF-T is a cost-effective and reliable solution for the power monitoring and protection. It integrates basic power-on reset (POR), low voltage detection (LVD) and window watchdog functions to provide an ideal solution for the current operation voltage level monitoring and reset capabilities. With its excellent wide voltage operating range, reliable performance and configurable setting, the ASM809LEURF-T is suitable for application such as communication baseband, electronic counter and automotion equipment, etc.

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