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Part Number: MB3793-30
Description: The MB3793 is an integrated circuit to monitor power voltage; it incorporates a watchdog timer.A reset signal i...
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MB3793-30
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DataSheet
General Description
MB3793-30 General Description
The MB3793 is an integrated circuit to monitor power voltage; it incorporates a watchdog timer.
A reset signal is output when the power is cut or falls abruptly. When the power recovers normally after resetting, a power-on reset signal is output to microprocessor units (MPUs). An internal watchdog timer with two inputs for system operation diagnosis can provide a fail-safe function for various application systems.
Two models with detection voltages of 4.2 and 3.0 V are available. There is also a mask option that can detect voltages of 4.9 to 3.0 V in 0.1-V steps.
The model numbers are MB3793-42 or -30 corresponding to the detected voltage. The model number and package code are as shown below.
| Model No. | Package code | Detection voltage |
| MB3793-42 | 3793-A | 4.2 V |
| MB3793-30 | 3793-N | 3.0 V |
MB3793-30 Maximum Ratings
(Ta = +25°C)
*The power voltage is based on the ground voltage (0 V).
Note: Permanent device damage may occur if the above ABSOLUTE MAXIMUM RATINGS are exceeded. Functional operation should be
restricted to the conditions as detailed in the operational sections of this data sheet. Exposure to absolute maximum rating conditions
for extended periods may affect device reliability.
| Parameter | Symbol | LImits | Unit | |
| Power voltage* | VCC | -0.3 to +7 | V | |
| Input voltage | CK1 | VCK1 | -0.3 to +7 | V |
| CK2 | VCK2 | |||
| INH | IINH | |||
| Reset output voltage (direct current) |
RESET | IOL | -10 to +10 | mA |
| IOH | ||||
| Allowable loss (Ta +85°C) | PD | 200 | mW | |
| Storage temperature | Tstg | -55 to +125 | °C | |
Note: Permanent device damage may occur if the above ABSOLUTE MAXIMUM RATINGS are exceeded. Functional operation should be
restricted to the conditions as detailed in the operational sections of this data sheet. Exposure to absolute maximum rating conditions
for extended periods may affect device reliability.
MB3793-30 Features
` Precise detection of power voltage fall: ±2.5%
` Detection voltage with hysteresis
` Low power dispersion: ICC = 27 A (reference)
` Internal dual-input watchdog timer
` Watchdog-timer halt function (by inhibition pin)
` Independently-set watchdog and reset times
` Mask option for detection voltage (4.9 to 3.0 V, 0.1-V steps)
` Detection voltage with hysteresis
` Low power dispersion: ICC = 27 A (reference)
` Internal dual-input watchdog timer
` Watchdog-timer halt function (by inhibition pin)
` Independently-set watchdog and reset times
` Mask option for detection voltage (4.9 to 3.0 V, 0.1-V steps)
MB3793-30 Connection Diagram
MB3793-30
PDF/DataSheet Download
- Datasheet: MB3793-30
- File Size: 197407 KB
- Manufacturer: FUJITSU [Fujitsu Media Devices Limited]
- Click here to Download
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