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MB3770, MB3770PF-TF, MB3771

Table of contents:
Info of MB3770
Info of MB3770PF-TF
Info of MB3771

MB3770, MB3770PF-TF, MB3771 Selling Leads, Datasheet

MFG:MB Package Cooled:1000 D/C:95+

MB3770, MB3770PF-TF, MB3771 Datasheet download

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Part Number: MB3770

MFG: MB

Package Cooled: 1000

D/C: 95+

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MB3771 General Description

The Fujitsu MB3771 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. The level of an arbitrary detection voltage is determined by two external resistors. The MB3771 is available in an 8-pin Dual In-Line, Single In-Line Package or space saving Flat Package.

MB3771 Maximum Ratings

Parameter	Symbol	Rating		Unit
Parameter	Symbol	Min.	Max.	Unit
Power supply voltage	V_CC	0.3	+20	V
Input voltage	V_SA	0.3	VCC + 0.3 ( < +20)	V
	V_SB	0.3	+20	V
	V_SC	-0.3	+20	V
Power dissipation	P_D	-	200 (Ta85 °C)	mW
Storage temperature	Tstg	55	+125	°C

WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current,
temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.

MB3771 Features

• Precision voltage detection (V_SA = 4.2 V ± 2.5 %)
• User selectable threshold level with hysterisis (V_SB = 1.23 V ± 1.5 %)
• Monitors the voltage of one or two power supplies (5 V and an arbitrary voltage, >1.23 V)
• Usable as over voltage detector
• Low voltage output for reset signal (V_CC = 0.8 V typ.)
• Minimal number of external components (one capacitor min.)
• Low power dissipation (I_CC = 0.35 mA typ., V_CC = 5 V)
• Detection threshold voltage has hyst

MB3771 Connection Diagram

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