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BU4939F-TR

BU4939F-TR

BU4939F-TR

ROHM Semiconductor

2.4V4 Terminals 4-Pin BU4939 Voltage supervisor1 Channels Min 700mV Max 7V

SOT-23

BU4939F-TR Datasheet PDF

non-compliant

Technical Specifications

Parameter NameValue
TypeParameter
Factory Lead Time 6 Weeks
Mount Surface Mount
Mounting Type Surface Mount
Package / Case SC-82
Number of Pins 4
Operating Temperature-40°C~125°C TA
PackagingTape & Reel (TR)
Published 2009
Pbfree Code yes
Part StatusActive
Moisture Sensitivity Level (MSL) 1 (Unlimited)
Number of Terminations 4
ECCN Code EAR99
Type Simple Reset/Power-On Reset
Subcategory Power Management Circuits
Max Power Dissipation400mW
Technology CMOS
Terminal Position DUAL
Terminal FormGULL WING
Number of Functions 1
Supply Voltage 2.4V
Base Part Number BU4939
Output Push-Pull, Totem Pole
Pin Count4
Power Supplies2.5/5V
Number of Channels 1
Max Supply Voltage7V
Min Supply Voltage700mV
Operating Supply Current 550nA
Max Supply Current 1.58μA
Adjustable Threshold NO
Quiescent Current500nA
Accuracy 1 %
Watchdog TimerNo
Reset Active High/Active Low
Voltage - Threshold 3.9V
Number of Voltages Monitored1
Min Reset Threshold Voltage 3.861V
Max Reset Threshold Voltage 3.939V
Threshold Voltage +3.9V
Undervoltage Threshold3.861V
Overvoltage Threshold3.939V
Length 2mm
RoHS StatusROHS3 Compliant
In-Stock:34670 items

Pricing & Ordering

QuantityUnit PriceExt. Price

BU4939F-TR Product Details

BU4939F-TR Overview


It is mounted through 4 terminals on the power management. Packaged in a Tape & Reel (TR)-shape, IC management comes with a number of features. Power management is possible to find a series of 1 functions. There are a total of 1 channels on this supervisor, and they are arranged in a series. For your reference, this PMIC includes a list of SC-82 functions. There are many benefits that this IC power shares with other Simple Reset/Power-On Reset products as well. In a 2.4V supply voltage, the power management conducts. A supply voltage of 1 is used to conduct the PMIC chip. Surface Mount mounts power management on the wall. A IC power such as this can be classified as a Power Management Circuits power management system. A total of 4 pins are located on this power management. There are 4 pins on the supervisor. It is recommended that the minimum supply voltage (Vsup) for this IC management should not be less than 700mV volts. The maximum supply voltage (Vsup) in this PMIC should not exceed 7V volts. Surface Mount mounting is recommended. This power management is the recommended temperature range for the supervisors: -40°C~125°C TA. During normal operation, this power managment ic can generate Push-Pull, Totem Pole of output voltage. The supply current of the power management is 550nA. To find similar IC managements from the manufacturer, you can always search by BU4939. To operate this power management, you will need at least 2.5/5V volts of power. The maximum supply temperature voltage supervisor can handle is 1.58μA.

BU4939F-TR Features


Simple Reset/Power-On Reset type
Minimum supply voltage of 700mV
550nA operating supply current

BU4939F-TR Applications


There are a lot of ROHM Semiconductor BU4939F-TR Voltage Supervisors applications.

  • Magnetic resonance imaging
  • Military communications
  • Radar
  • Data storage applications
  • Network equipment
  • DSP
  • Radio
  • Digitally controlled LDO regulators circuit
  • Battery-powered equipment
  • Smart meter

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