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Cypress Semiconductor Electronic Components Datasheet

MB3793-28A Datasheet

Power-Voltage Monitoring IC

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MB3793-28A
Description
Power-Voltage Monitoring IC
with Watchdog Timer Datasheet
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.
Model No.
MB3793-28A
Marking Code
3793AR
Detection voltage
2.8 V
Features
Precise detection of power voltage fall: ±2.5%
Detection voltage with hysteresis
Low power dispersion: ICC = 41 μA (Typ)
Internal dual-input watchdog timer
Watchdog timer halt function
Independently-set watchdog and reset times
Application
Arcade Amusement
etc.
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 002-08559 Rev. *C
• San Jose, CA 95134-1709 • 408-943-2600
Revised June 22, 2017


Cypress Semiconductor Electronic Components Datasheet

MB3793-28A Datasheet

Power-Voltage Monitoring IC

No Preview Available !

MB3793-28A
Contents
Description ........................................................................ 1
Features ............................................................................. 1
Application ........................................................................ 1
Contents ............................................................................ 2
1. Pin Assignment ...................................................3
2. Pin Description ....................................................3
3. Block Diagram .....................................................4
4. Block Functions ..................................................5
4.1 Comp. S ................................................................ 5
4.2 Output circuit ......................................................... 5
4.3 Pulse generator ..................................................... 5
4.4 Watchdog timer ..................................................... 5
4.5 Logic circuit ........................................................... 5
5. Absolute Maximum Ratings ...............................6
6. Recommended Operating ConditionS ..............6
7. Electrical Characteristics ...................................7
7.1 DC Characteristics ................................................ 7
7.2 AC Characteristics ................................................. 7
8. Timing Diagram ...................................................8
8.1 Basic operation (Positive clock pulse) .................. 8
8.2 Basic operation (Negative clock pulse) ................ 9
8.3 Single-clock input monitoring (Positive clock pulse) 10
8.4 Inhibition operation (Positive clock pulse) ........... 11
8.5 Clock pulse input supplementation
(Positive clock pulse) ........................................................ 12
9. Operation Sequence .........................................13
9.1 Positive clock pulse input .................................... 13
9.2 Negative clock pulse input ................................... 13
9.3 Single-clock input monitoring .............................. 13
9.4 Description of Operations .................................... 13
10. Typical Characteristics ..................................15
11. Application Example .......................................18
11.1 Supply voltage monitor and watchdog timer ..... 18
11.2 Supply voltage monitor and watchdog timer stop 19
11.3 Setting of compulsory reset .............................. 19
12. Usage Precaution ............................................20
13. Ordering Information ......................................20
14. RoHS Compliance Information of Lead (Pb)
Free version ...........................................................20
15. Package Dimensions ......................................21
16. Document History ...........................................22
Sales, Solutions, and Legal Information ...................... 23
Document Number: 002-08559 Rev. *C
Page 2 of 23


Part Number MB3793-28A
Description Power-Voltage Monitoring IC
Maker Cypress Semiconductor
Total Page 23 Pages
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