Voltage Detector with Adjustable Delay Time - BU4240G

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. Tthe entire series is of course both lead-free and RoHS-compliant.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part number
Unit Quantity
Minimum Package Quantity
Packing Type
Constitution Materials List
BU4240G-TR Active SSOP5 3000 3000 Taping inquiry Yes
Voltage Detection[V] 4.0
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
  • ・Broad lineup available in different detection voltages : 0.9V to 4.8V (0.1V increments)
    ・High detection voltage accuracy : ±1%
    ・Ultra-low current consumption
Technical Data
Application Note

Voltage Detector Circuit Collection

Application Note

Spice Models for Voltage Detector ICs

Application Note

Thermal Resistance