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MAX3224EAP+ Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX3224EAP+ Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 19 page By connecting FORCEON to INVALID, the MAX3224– MAX3227/MAX3244/MAX3245 shut down when no valid receiver level and no receiver or transmitter edge is detected for 30sec, and wake up when a valid receiver level or receiver or transmitter edge is detected. By connecting FORCEON and FORCEOFF to INVALID, the MAX3224–MAX3227/MAX3244/MAX3245 shutdown when no valid receiver level is detected and wake up when a valid receiver level is detected (same function- ality as AutoShutdown feature on MAX3221/MAX3223/ MAX3243). A mouse or other system with AutoShutdown Plus may need time to wake up. Figure 5 shows a circuit that forces the transmitters on for 100ms, allowing enough time for the other system to realize that the MAX3244/ MAX3245 is awake. If the other system outputs valid RS-232 signal transitions within that time, the RS-232 ports on both systems remain enabled. 1µA Supply Current, 1Mbps, 3.0V to 5.5V, RS-232 Transceivers with AutoShutdown Plus ______________________________________________________________________________________ 11 VCC 0 0 V+ V- VCC 0 INVALID OUTPUT OUTPUT TRANSMITTER INPUTS RECEIVER INPUTS } INVALID REGION *MAX3224–MAX3227 TRANSMITTER OUTPUTS *VCC tAUTOSHDN tWU tWU tINVL tINVH tAUTOSHDN Figure 4b. AutoShutdown Plus, INVALID, and READY Timing Diagram FORCEON MASTER SHDN LINE 0.1 μF1MΩ FORCEOFF MAX3224 MAX3225 MAX3226 MAX3227 MAX3244 MAX3245 POWER- MANAGEMENT UNIT Figure 5. AutoShutdown Plus Initial Turn-On to Wake Up a Mouse or Another System |
Similar Part No. - MAX3224EAP+ |
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Similar Description - MAX3224EAP+ |
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