Product Summary

The MB3771 is a Power Supply Monitor. It is designed to monitor the voltage level of one or two power supplies (+5 V and an arbitrary voltage) in a microprocessor circuit, memory board in large-size computer, for example. If the circuit’s power supply deviates more than a specified amount, then the MB3771 generates a reset signal to the microprocessor. Thus, the computer data is protected from accidental erasure. Using the MB3771 requires few external components. To monitor only a +5 V supply, the MB3771 requires the connection of one external capacitor.

Parametrics

MB3771 absolute maximum ratings: (1)Power supply voltage:-0.3 to +20V; (2)Input voltage:VSA:-0.3 to VCC + 0.3V ( < +20), VSB:-0.3 to +20V, VSC:-0.3 to +20V; (3)Power dissipation:200mW; (4)Storage temperature:-55 to +125℃.

Features

MB3771 features: (1)Precision voltage detection (VSA = 4.2 V ± 2.5 %) ; (2)User selectable threshold level with hysterisis (VSB = 1.23 V ±1.5 %) ; (3)Monitors the voltage of one or two power supplies (5 V and an arbitrary voltage, >1.23 V); (4)Usable as over voltage detector; (5)Low voltage output for reset signal (VCC = 0.8 V typ.); (6)Minimal number of external components (one capacitor min.); (7)Low power dissipation (ICC = 0.35 mA typ., VCC = 5 V); (8)Detection threshold voltage has hysteresis function; (9)Reference voltage is connectable.

Diagrams

MB3771 block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
MB3771
MB3771
Other

Data Sheet
Negotiable 
MB3771PF-G-BND-JNE1
MB3771PF-G-BND-JNE1

IC POWER SUPPLY MONITOR 8SOP
Data Sheet
0-1: $0.74
1-10: $0.65
10-50: $0.59
50-100: $0.51
100-250: $0.45
250-500: $0.40
500-1000: $0.32
1000-2500: $0.29
2500-5000: $0.28
MB3771PF-G-BND-JN-ERE1
MB3771PF-G-BND-JN-ERE1

IC POWER SUPPLY MONITOR 8SOP
Data Sheet
0-1: $0.76
1-10: $0.67
10-50: $0.60
50-100: $0.53
100-250: $0.46
250-500: $0.41