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Product Variant Information section
Product Specification Section
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Minimum Order: 3,000
Multiple Of: 3,000
Quantity Web Price
3,000 $0.171
6,000 $0.15
9,000 $0.15
12,000+ $0.149


Attributes Table
Output Type CMOS
Threshold Voltage 1.1V
Supply Voltage-Max 7V
Output Current-Max 4mA
No of Inputs 1
Supply Voltage -0.3V to +7V
Power Dissipation 400mW
Operating Temp Range -40°C to +125°C
Storage Temperature Range -55°C to +125°C
No of Terminals 2
Dimension 2 x 2.1 x 0.95 mm
Features and Applications

The BU4211F-TR is a open drain CMOS voltage detector IC with a threshold voltage of 1.1 V. Available in surface mount SOIC-4 package.

This device is a high-accuracy, low current consumption Voltage Detector IC series with a built-in delay circuit.


  • Delay Time Controlled by external Capacitor
  • Two output types (Nch open drain and CMOS output)
  • Ultra-low current consumption
  • Wide operating temperature range
  • Very small and low height package
  • Package SOP4 (JEDEC)


  • Detection voltage: 0.9 V to 4.8 V (Typ.) 0.1 V steps
  • High accuracy detection voltage: ±1.0%
  • Ultra-low current consumption: 0.55 μA (Typ.)
  • Operating temperature range: -40 °C to +125 °C


  • Circuits using microcontrollers or logic circuits that require a reset

View the available BU42x series of Detector ICs