ROHM BD45XXXG BD46XXXG Data Sheet
Summary
These high-accuracy Voltage Detector ICs (BD45XXXG and BD46XXXG) are designed for fault prevention in electronic systems, utilizing ultra low current consumption technology. The product line includes 156 types offering precise voltage detection across a range of delay times (50ms to 200ms). Ideal for embedded system designers developing appliances or logic circuits with microcontrollers, this manual provides comprehensive details including application circuit diagrams, full electrical specifications, and models featuring fixed delay time functionality without needing external capacitors.
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BD45XXXG
Voltage detectors BD46XXXG
VOLTAGE DETECTOR IC with counter timer BD45XXXG BD46XXXG BD45XXXG and BD46XXXG are series of high-accuracy detection voltage and low current consumption VOLTAGE DETECTOR ICs adopting CMOS process. New lineup of 156 types with delay time circuit have developed. Delay time is fixed in the IC due to the built-in counter timer to require no external capacitor. Total 156 types of VOLTAGE DETECTOR ICs including BD45XXXG series (Nch open drain output) and BD46XXXG series (CMOS output), each of which has 26 kinds in every 0.1V step (2.3~4.8V) and three kinds of delay time (50msec, 100msec, 200msec) have developed.
Applications
BD45XXXG
Every kind of appliances with microcontroller and logic circuit BD46XXXG
1pin : External RESET Features control 2pin : Connect to Sub, GND
1) Built-in delay time circuit 3pin : GND
4pin : VOUT
(Fixed delay time by the built-in ±10% of high-accuracy counter timer)
5pin : VDD 2) No external capacitor for setting delay time required (UNIT:mm)
3) 3 kinds of delay time: 50msec(Typ.)(BD45XX5G,BD46XX5G) 1.6 0.1 (5) (4)
100msec(Typ.)(BD45XX1G,BD46XX1G) 1.2 5M AX 1. 1±
200msec(Typ.)(BD45XX2G,BD46XX2G) 4) Detection voltage: 2.3V ~ 4.8V 0.1V step
5) High-accuracy detection voltage: ±1.0% +0.050.13 –0.03
6) Ultra low current consumption: 0.85µA typ. 7) Output circuit: Nch open drain(BD45XXXG)
0.2 MIN
CMOS(BD46XXXG) 0.95 0.42
8) Package: SSOP5(SMP5C2) 9) Operating temperature range: -40°C ~ +105°C
SSOP5(SMP5C2)
Application Circuit BD45XXXG BD46XXXG
VDD VDD VDD
VDD VDD
Reset
Oscillation circuit Oscillation circuit Reset
counter timer counter timer Vout
Vref Vref
GND ER GND ER
Pin No.
SSOP5 ER Sub GND VOUT VDD
Page Summary Contents For ROHM BD45XXXG BD46XXXG Data Sheet
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 4 |
| File Size | 160.54 KB |
| Published | May 29, 2026 |
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Frequently Asked Questions
What are the main differences between the BD45XXXG and BD46XXXG series?
BD45XXXG uses an Nch open drain output, while BD46XXXG utilizes a CMOS output.
Is external circuitry required to set the delay time?
No; the built-in counter timer fixes the delay time within the IC, eliminating the need for an external capacitor.
What is the operational temperature range for these voltage detectors?
They are rated for a wide operating temperature range of -40°C to +105°C.
How do I select the correct detection voltage (VDET)?
The line-up includes 26 kinds at every 0.1V step, covering voltage ranges from 2.3V to 4.8V.