Voltage Detectors (Reset ICs)

ROHM voltage detectors are reset ICs that feature superior ±1% detection. The broad lineup covers a wide voltage detection range while providing low current consumption in a small, thin form factor. These detectors are suitable for any application equipped with microcontrollers, CPUs, digital signal processors (DSPs), or various other controllers. In addition to the standard type, the series includes models with adjustable delay time, fixed delay time and watchdog timeout.

Both open drain output and CMOS are available that allows the output of the reset signal to be selected depending on the connected power supply. In addition, pin- and function-compatible SSOP packages enable easy replacement for existing ICs.

What’s more, the compact form factor allows engineers to place the circuit near microcontrollers in ultra-compact systems. And the entire lineup is both Pb-free and RoHS compliant.

Use our Easy Parts Finder below to quickly look through our selection of standard and automotive-grade Voltage Detectors (Reset ICs). Looking for something more specific? Take advantage of our Parametric Search to filter by grade, standard, voltage, package size, delay time and more.
Voltage Detectors (Reset ICs)
FAQ

Voltage Detectors Easy Parts Finder

Series Delay time Features Circuit Current (µA) Voltage Detection Accuracy Ta=25°C (%) Detection Voltage Range (V) Detection Voltage Steps (V) Absolute Maximum Ratings Voltage (V) Operating Voltage Range (V) Hysteresis Voltage Package Operating Temperature Range Manual Reset PIN
BD48(49)Exx Series - - 0.85 ±1 2.3 to 6.0 0.1V 10 0.95 to 10.0 5% SSOP5 -40°C to 105°C -
BD48(49)Kxx Series - - 0.85 ±1 2.3 to 6.0 0.1V 10 0.95 to 10.0 5% SSOP3 (GND 1pin) -40°C to 105°C -
BD48(49)Lxx Series - - 0.85 ±1 2.3 to 6.0 0.1V 10 0.95 to 10.0 5% SSOP3 (GND 3pin) -40°C to 105°C -
BD48(49)xx Series - - 0.85 ±1 2.3 to 6.0 0.1V 10 0.95 to 10.0 5% VSOF5 -40°C to 105°C -
BD47xx Series - - 1.6 ±1 1.9 to 4.6 0.1V 10 0.85 to 10.0 50mV SSOP5 -40°C to 75°C -
BD71L4Lx-1 Series - Over Voltage Detection
(Low active)
0.7 ±0.8 4.05 - 7 1.2 to 7.0 30mV SSOP5, HVSOF5 -40°C to 85°C -
BD71L3Sx Series - Over Voltage Detection
(Low active)
0.7 ±1 3.83 - 7 1.2 to 7.0 30mV HVSOF5 -40°C to 85°C -
BD52(53)Exx Series Controlled by External Capacitor - 0.9 ±1 2.3 to 6.0 0.1V 10 0.95 to 10.0 5% SSOP5 -40°C to 105°C -
BD52(53)xx Series Controlled by External Capacitor - 0.9 ±1 2.3 to 6.0 0.1V 10 0.95 to 10.0 5% VSOF5 -40°C to 105°C -
BU42(43)xx Series Controlled by External Capacitor - 0.55 ±1 0.9 to 4.8 0.1V 7 0.7 to 7.0 5% SSOP5, SOP4, VSOF5 -40°C to 125°C -
BD4142HFV Controlled by External Capacitor Sense type 7.5 ±1.8 Default 0.5V (Adjustable via external resistors) - 6 3.0 to 5.5 10mV HVSOF5 -10°C to 100°C -
BD37AxxFVM Series Controlled by External Capacitor With Watchdog Timer
(INH pin switches to "High")
5 ±1.5 1.9, 4.1 - 10 1.0 to 10.0 13%, 3.5% MSOP8 -40°C to 105°C -
BD99A41F Controlled by External Capacitor With Watchdog Timer
(INH pin switches to "High")
5 ±1.5 4.1 - 10 1.0 to 10.0 3.5% SOP8 -40°C to 105°C -
BD87AxxFVM Series Controlled by External Capacitor With Watchdog Timer
(INH pin switches to "Low")
5 ±1.5 2.8, 2.9, 3.4, 4.1 - 10 1.0 to 10.0 3.5%, 4.5%, 5% MSOP8 -40°C to 105°C -
BD3775AF Controlled by External Capacitor 2ch Reset & Comparator 350 ±1.5 1.23 - 20 3.5 to 18.0 28mV SOP8 -40°C to 85°C -
BD45(46)xxx Series Counter Timer Built-in 50ms, 100ms, 200ms 0.85 ±1 2.3 to 6.0 0.1V 10 0.95 to 10.0 5% SSOP5 -40°C to 105°C Yes
BU45(46)Kxxx Series Counter Timer Built-in 200ms, 400ms 2.8 ±1 2.3 to 6.0 0.1V 10 0.95 to 10.0 5% SSOP3 (GND 1pin) -40°C to 105°C -
BU45(46)Lxxx Series Counter Timer Built-in 200ms, 400ms 2.8 ±1 2.3 to 6.0 0.1V 10 0.95 to 10.0 5% SSOP3 (GND 3pin) -40°C to 105°C -
Series Delay time Features Circuit Current (µA) Voltage Detection Accuracy Ta=25°C (%) Detection Voltage Range (V) Detection Voltage Steps (V) Absolute Maximum Ratings Voltage (V) Operating Voltage Range (V) Hysteresis Voltage Package Operating Temperature Range Manual Reset PIN
BD48(49)ExxG-M Series - - 0.85 ±1 2.3 to 6.0 0.1V 10 0.95 to 10.0 5% SSOP5 -40°C to 105°C -
BD45(46)ExxxG-M Series Counter Timer Built-in 50ms, 100ms, 200ms 0.85 ±1 2.3 to 6.0 0.1V 10 0.95 to 10.0 5% SSOP5 -40°C to 105°C Yes
BD52(53)xxG-2M Series Controlled by External Capacitor - 0.27 ±2.5 (Ta= All temperature) 0.9 to 5.0 0.1V 7 0.8 to 6.0 5% SSOP5 -40°C to 105°C -
BD52(53)xxG-2C Series Controlled by External Capacitor - 0.27 ±3.0 (Ta= All temperature) 0.9 to 5.0 0.1V 7 0.8 to 6.0 5% SSOP5 -40°C to 125°C -
BD52(53)xxNVX-2C Series Controlled by External Capacitor - 0.27 ±2.5 (Ta= All temperature) 2.6 to 3.1 0.1V 7 0.8 to 6.0 5% SSON004R1010 -40°C to 125°C -
NEW
BD70(73)xxG-2C/
BD70H31G-C Series
- Over Voltage Detection
(High active)
0.3 ±1.4 (Ta= All temperature) 3.46 to
3.76 / 3.06
0.1V 7 0.8 to 6.0 - SSOP5 -40°C to 125°C -
NEW
BD52W03G-C
Controlled by External Capacitor Window Type, SENSE Detection 0.3 ±5.0 (Ta= All temperature) 1.98V
(Over Voltage) /
1.62V
(Under Voltage)
- 7 1.6 to 6.0 - SSOP6 -40°C to 125°C -