XC6121A518MR-G

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Watchdog Circuit
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active Low
Reset Timeout:	400 ms Typical
Voltage - Threshold:	1.8V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	SOT-25

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Introduction

XC6121A518MR-G is a 3.3V Voltage Supervisor fromROHM Semiconductor. This voltage supervisor is specifically designedfor portable applications such as cell phones and PDAs. It containspower-on reset (POR) and overvoltage detection (OVD) function toensure safe power supplies and secure device operation. Thedevice comes in an ultra-small 3mmx2.45mm MLP6-L10 package andprovides high-sensitivity voltage supervision for applications atlow static currents.

Application Field

XC6121A518MR-G can be used in a variety of differentapplications, including mobile phones, PDAs, point of sale (POS)terminals, GPS receivers, and other portable electronic devices.It can be used in applications where power system stability,protection, and portability are required. The device can also beused for low level control.

Working Principle

The XC6121A518MR-G voltage supervisor operates by comparinginput voltage to a reference voltage. If the input voltage goesabove or below the reference voltage, an output signal isgenerated. The output signal can then be used to controlexternal devices to ensure system stability.The XC6121A518MR-G voltage supervisor has a built-in2.2V voltage reference with +/-2% accuracy. This reference canbe used to detect input voltages below or above the set levels.The device also has a built-in pull-up resistor which can be usedto pull the output high when the input voltage is within the setlevels.The device has two different operating modes: latching andnon-latching. In latching mode, when the voltage at the inputgoes above or below the reference voltage, the output will betriggered and will remain in the LOW state until the reset pin isactivated. In non-latching mode, the output will reset to the highstate when the input voltage returns to the reference voltage.

Conclusion

The XC6121A518MR-G is a voltage supervisor specificallydesigned for portable applications such as cell phones and PDAs.It contains power-on reset (POR) and overvoltage detection(OVD) function to ensure device safety and secure operation, andcomes in an ultra-small 3mmx2.45mm MLP6-L10 package. Itsbuilt-in voltage reference with +/-2% accuracy, and its built-inpull-up resistor make it ideal for low level control applications.It has two operating modes, latching and non-latching, allowingusers to customize the device to their specific application needs.

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