MB3793-34APNF-G-JN-ER6E1

MB3793-34A Power-Voltage Monitoring IC with Watchdog Timer 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 MB3793-34A 3793AJ 3.4 V Features Precise detection of power voltage fall: 2.5 % Detection voltage with hysteresis Low power dispersion: I = 38 A (Typ) CC 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 San Jose, CA 95134-1709 408-943-2600 Document Number: 002-08556 Rev. *C Revised June 20, 2017 MB3793-34A Contents Description ................................................................... 1 9. Operation Sequence ............................................ 14 Features ....................................................................... 1 9.1 Positive Clock Pulse Input ............................. 14 Application ................................................................... 1 9.2 Negative Clock Pulse Input ............................ 14 9.3 Single-clock Input Monitoring ......................... 14 1. Pin Assignment ...................................................... 3 9.4 Description of Operations .............................. 14 2. Pin Description ....................................................... 3 10. Typical Characteristics ...................................... 16 3. Block Diagram ........................................................ 4 11. Application Example .......................................... 19 4. Block Functions ..................................................... 5 11.1 Supply Voltage Monitor and Watchdog 5. Absolute Maximum Ratings .................................. 6 Timer ..................................................................... 19 6. Recommended Operating Conditions .................. 6 11.2 Supply Voltage Monitor and Watchdog 7. Electrical Characteristics ...................................... 7 Timer Stop ............................................................. 20 7.1 DC Characteristics ........................................... 7 11.3 Setting of Compulsory Reset ...................... 20 7.2 AC Characteristics ........................................... 8 12. Usage Precaution ............................................... 21 8. Timing Diagram ...................................................... 9 13. Ordering Information ......................................... 21 8.1 Basic Operation (Positive clock pulse) ............. 9 14. RoHS Compliance Information ......................... 21 8.2 Basic Operation (Negative clock pulse) ......... 10 15. Package Dimensions ......................................... 22 8.3 Single-clock Input Monitoring (Positive Clock Document History ..................................................... 23 Pulse) .................................................................... 11 Sales, Solutions, and Legal Information ................. 24 8.4 Inhibition Operation (Positive Clock Pulse) .... 12 8.5 Clock Pulse Input Supplementation (Positive Clock Pulse) .......................................................... 13 Document Number: 002-08556 Rev. *C Page 2 of 24