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MAX6733UTSYD3-T Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX6733UTSYD3-T Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 16 page Applications Information Interfacing to µPs with Bidirectional Reset Pins Microprocessors with bidirectional reset pins can inter- face directly with the open-drain RST output options. However, conditions might occur in which the push-pull output versions experience logic contention with the bidirectional reset pin of the µP. Connect a 10k Ω resis- tor between RST and the µP’s reset I/O port to prevent logic contention (Figure 5). Falling VCC Transients The MAX6730–MAX6735 µP supervisors are relatively immune to short-duration falling VCC_ transients (glitch- es). Small glitches on VCC_ are ignored by the MAX6730–MAX6735, preventing undesirable reset pulses to the µP. The Typical Operating Characteristics show Maximum Transient Duration vs. Reset Threshold Single-/Dual-/Triple-Voltage µP Supervisory Circuits with Independent Watchdog Output ______________________________________________________________________________________ 11 tRP >tWD-S tMR <tWD-S <tWD-L <tWD-L tRP VTH VCC (MIN) VCC1, VCC2 RSTIN RST WDO WDI MR Figure 4. Watchdog Input/Output Timing Diagram (MR and WDO Connected) MAX6731 MAX6733 MAX6735 VCC1 VCC1 VCC2 VCC2 RESET TO OTHER SYSTEM COMPONENTS GND µP RST GND 10k Ω RESET Figure 5. Interfacing to µPs with Bidirectional Reset I/O |
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