MB3771PF-G-BND-JNE1 Fujitsu Semiconductor America Inc, MB3771PF-G-BND-JNE1 Datasheet

IC POWER SUPPLY MONITOR 8SOP

MB3771PF-G-BND-JNE1

Manufacturer Part Number
MB3771PF-G-BND-JNE1
Description
IC POWER SUPPLY MONITOR 8SOP
Manufacturer
Fujitsu Semiconductor America Inc
Datasheet

Specifications of MB3771PF-G-BND-JNE1

Applications
Power Supply Monitor
Voltage - Supply
3.5 V ~ 18 V
Current - Supply
350µA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Input
-
Other names
865-1021

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MB3771PF-G-BND-JNE1
Manufacturer:
Micrel
Quantity:
56
FUJITSU SEMICONDUCTOR
ASSP For power supply applications
BIPOLAR
Power Supply Monitor
MB3771
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.
FEATURES
• Precision voltage detection (V
• User selectable threshold level with hysterisis (V
• 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
• Minimal number of external components (one capacitor Min)
• Low power dissipation (I
• Detection threshold voltage has hysteresis function
• Reference voltage is connectable.
PACKAGES
DATA SHEET
8-pin plastic DIP
(DIP-8P-M01)
CC
= 0.35 mA Typ, V
SA
= 4.2 V ± 2.5
CC
= 0.8 V Typ)
CC
= 5 V)
8-pin plastic SIP
)
(SIP-8P-M03)
SB
= 1.23 V ± 1.5
)
8-pin plastic SOP
(FPT-8P-M01)
DS04-27400-9E

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MB3771PF-G-BND-JNE1 Summary of contents

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FUJITSU SEMICONDUCTOR DATA SHEET ASSP For power supply applications BIPOLAR Power Supply Monitor MB3771 DESCRIPTION The Fujitsu MB3771 is designed to monitor the voltage level of one or two power supplies (+5 V and an arbitrary voltage microprocessor ...

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MB3771 PIN ASSIGNMENT (TOP VIEW OUT 3 C GND 4 (DIP-8P-M01) (FPT-8P-M01) BLOCK DIAGRAM 100 Comp RESIN SB Comp (FRONT VIEW) 8 ...

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FUNCTIONAL DESCRIPTIONS Comparators Comp.A and Comp.B apply a hysteresis to the detected voltage, so that when the voltage at either the pin falls below 1.23 V the RESET output signal goes to “low” level Comp. ...

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MB3771 ABSOLUTE MAXIMUM RATINGS Parameter Symbol Power supply voltage V V Input voltage V V Power dissipation P Storage temperature Tstg WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current, temperature, etc.) in excess of absolute ...

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ELECTRICAL CHARACTERISTICS 1. DC Characteristics Parameter Symbol Power supply current (DOWN) Detection voltage V SAH Hysterisis width Detection voltage Deviation of detection voltage Hysterisis width Input current Output voltage Output sink current CT charge current Input current Detection voltage Deviation ...

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MB3771 2. AC Characteristics Parameter Symbol input pulse width SA SB Reset hold time RESET rise time RESET fall time Propagation delay time *1: In case of V termination. SB *2: In case of V termination. SC ...

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APPLICATION CIRCUIT 1. 5V Power Supply Monitor Monitored Detection threshold voltage Power Supply Voltage Monitor (Externally Fine-Tuned Type) The V detection voltage can be adjusted externally. SA Resistance ...

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MB3771 3. Arbitrary Voltage Supply Monitor (1) Case • Detection Voltage can be set by R Detection Voltage = ( • Connect Pin when • ...

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V and 12 V Power Supply Monitor (2 types of power supply monitor V • monitored Detection voltage is about 4 • monitored When ...

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MB3771 Power Supply Monitor with forced RESET input (V RESIN is an TTL compatible input. RESIN Power Supply Monitor with Non-inverted RESET In this case, Comparator C is used to ...

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Dual (Positive/Negative) Power Supply Voltage Monitoring (V Supply) Monitors and a negative (any given level) power supply. R Detection Voltage = Example ...

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MB3771 ( Reference Voltage Generation and 5V Monitoring (No.1) Detection Voltage = 4 the above examples, the output voltage and the detection voltage are determined by the following equations: Output Voltage = ( ...

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Low Voltage and Over Voltage Detection (V V has no hysteresis. When over voltage is detected, RESET is held in the constant time as well as when SH low voltage is detected ...

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MB3771 13. Back-up Power Supply System (V • Use CMOS Logic and connect V • The back-up battery works after CS goes high as V • During t , memory access is prohibited. PO • CS‘s threshold voltage V is ...

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TYPICAL CHARACTERISTICS Power supply current vs. power supply voltage 700 600 500 Ta 400 300 200 25 C 100 Power supply voltage V Power supply current ...

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MB3771 (Continued) Detection voltage ( vs. Power supply voltage SB SC 1.27 V SBH 1. 1.25 1.24 V SBL 1.23 1.22 1.21 1. Power supply voltage V Reset hold time vs. power ...

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... The worker must put on a grounding device containing 250 k • Do not apply a negative voltage - Applying a negative voltage of 0 less to an LSI may generate a parasitic transistor, resulting in malfunction. ORDERING INFORMATION Part number MB3771P MB3771PS MB3771PF resistors in series. Package 8-pin Plastic DIP (DIP-8P-M01) 8-pin Plastic SIP (SIP-8P-M03) 8-pin Plastic SOP ...

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MB3771 PACKAGE DIMENSIONS 8-pin Plastic DIP (DIP-8P-M01) 4.36(.172)MAX 3.00(.118)MIN +0.30 0.99 –0 +.012 .039 –0 +0.35 0.89 –0.30 +.014 .035 –.012 1994 FUJITSU LIMITED D08006S-2C +0.40 9.40 –0.30 +.016 .370 –.012 1 PIN INDEX 6.20±0.25 (.244±.010) 0.51(.020)MIN 0.25±0.05 ...

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Plastic SIP (SIP-8P-M03) INDEX-1 INDEX-2 +0.30 0.99 –0 +.012 .039 –0 2.54(.100) TYP 1994 FUJITSU LIMITED S08010S-3C-2 C +0.15 19.65 –0.35 +.006 .774 –.014 6.20±0.25 (.244±.010) 8.20±0.30 (.323±.012) 4.00±0.30 (.157±.012) +0.30 1.52 0.50±0.08 –0 +.012 (.020±.003) .060 –0 ...

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MB3771 (Continued) 8-pin Plastic SOP (FPT-8P-M01) +0.25 +.010 * 1 6.35 .250 –0.20 –.008 8 INDEX 1 1.27(.050) 0.10(.004) 0.10(.004) 2002 FUJITSU LIMITED F08002S-c-6 Note These dimensions include resin protrusion. Note These ...

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MB3771 FUJITSU LIMITED All Rights Reserved. The contents of this document are subject to change without notice. Customers are advised to consult with FUJITSU sales representatives before ordering. The information, such as descriptions of function and application circuit examples, in ...

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