BU4242F
4.2V, Adjustable Delay, High Accuracy Voltage Detector

ROHM's low voltage CMOS reset ICs utilize CMOS processes for high precision and low current consumption. In addition, a delay circuit is built in, enabling arbitrary setting of the delay time via external capacitor. The extensive lineup includes both Nch Open Drain and CMOS output types in a wide range of detection voltages (from 0.9V to 4.8V, in 0.1V steps), enabling selection of the ideal solution based on customer requirements. The entire series is of course both lead-free and RoHS-compliant.

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Product Detail

 
Part Number | BU4242F-TR
Status | Recommended
Package | SOP4
Unit Quantity | 3000
Minimum Package Quantity | 3000
Packing Type | Taping
RoHS | Yes

Specifications:

Under Voltage Detection Voltage [V] (typ.)

4.2

VDET Precision [%]

±1

Reset Active Voltage Range [V]

0.7 to 7

Output Types

Open drain

Reset Delay Timer

Adjustable Delay

Reset Active State

Low

Manual Reset

No

Watchdog Timer

No

Auto Motive

No

Circuit Current (ON) [µA]

0.40(VDET=4.8V)

Circuit Current (OFF) [µA]

0.55(VDET=4.8V)

Hysteresis Voltage [V]

VDET x 0.05

L Output Current (LowVol) [mA]

3.3

L Output Current (HighVol) [mA]

6.5

Delay Circuit Resistance [MΩ]

10.0

Operating Temperature (Min.)[°C]

-40

Operating Temperature (Max.)[°C]

125

Package Size

2x2.1 (t=1.05)

Features:

・Broad lineup available in different detection voltages : 0.9V to 4.8V (0.1V increments)
・High detection voltage accuracy : ±1%
・Ultra-low current consumption
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Design Resources

 

Documents

White Paper

  • ISO 26262: Functional Safety Standard for Modern Road Vehicles

Application Note

  • Voltage Detector Circuit Collection

Technical Articles

Schematic Design & Verification

  • Spice Models for Voltage Detector ICs
  • Importance of Probe Calibration When Measuring Power: Deskew
  • Impedance Characteristics of Bypass Capacitor

Thermal Design

  • What Is Thermal Design
  • Method for Calculating Junction Temperature from Transient Thermal Resistance Data
  • Thermal Resistance

Tools

Models

  • BU4242F PSPICE Model

2D/3D/CAD

  • SOP4 Footprint / Symbol

Packaging & Quality

Package Information

  • Package Information
  • Anti-Whisker formation

Manufacturing Data

  • Factory Information

Environmental Data

  • UL94 Flame Classifications of Mold Compound
  • Compliance with the ELV directive
  • REACH SVHC Non-use Declaration
  • RoHS Comission Delegated Directive

Export Information

  • The Export Control Order
  • Export Administration Regulations(EAR)