MB3793-45PNF-G-JN-ER-6E1 Infineon

MB3793-45 Power-Voltage Monitoring IC with Watchdog Timer Datasheet 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. Model No. Marking Code Detection Voltage MB3793-45 3793-7 4.5 V Features Precise detection of power voltage fall: 2.5% Detection voltage with hysteresis Low power dispersion: I = 31 A (reference) CC Internal dual-input watchdog timer Watchdog timer halt function (by inhibition pin) Independently-set watchdog and reset times Application Arcade Amusement etc. Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 002-08552 Rev. *C Revised June 29, 2017 MB3793-45 Contents Description ................................................................... 1 8.5 Clock Pulse Input Supplementation (Positive Features ....................................................................... 1 Clock Pulse) .......................................................... 12 Application ................................................................... 1 9. Operation Sequence ............................................ 13 1. Pin Assignment ...................................................... 3 10. Typical Characteristics ...................................... 15 2. Pin Description ....................................................... 3 11. Application Example .......................................... 18 3. Block Diagram ........................................................ 4 11.1 Supply Voltage Monitor and Watchdog Timer18 11.2 Supply Voltage Monitor and Watchdog Timer 4. Block Functions ..................................................... 5 Stop ...................................................................... 19 5. Absolute Maximum Ratings .................................. 6 11.3 Setting of Compulsory Reset ....................... 19 6. Recommended Operating Conditions .................. 6 12. Usage Precaution ............................................... 20 7. Electrical Characteristics ...................................... 7 13. Ordering Information ......................................... 20 7.1 DC Characteristics ........................................... 7 14. RoHS Compliance Information ......................... 20 7.2 AC Characteristics ........................................... 7 15. Package Dimensions ......................................... 21 8. Timing Diagram ...................................................... 8 8.1 Basic Operation (Positive Clock Pulse) ........... 8 16. Major Changes ................................................... 23 8.2 Basic Operation (Negative Clock Pulse) .......... 9 Sales, Solutions, and Legal Information ................. 24 8.3 Single-Clock Input Monitoring (Positive Clock Pulse) .................................................................... 10 8.4 Inhibition Operation (Positive Clock Pulse)..... 11 Document Number: 002-08552 Rev. *C Page 2 of 24