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MAX3226 Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX3226 Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 20 page 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. Software-Controlled Shutdown If direct software control is desired, use INVALID to indicate DTR or Ring Indicator signal. Tie FORCEOFF and FORCEON together to bypass the AutoShutdown Plus so the line acts like a SHDN input. 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 µF 1M 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. - MAX3226 |
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Similar Description - MAX3226 |
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