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MAX3227: max3227 & max 3221 difference

Part Number: MAX3227
Other Parts Discussed in Thread: MAX3221

Dear,

as below , the picture 1 is max3221 function table , and picture 2 marked  is max3227 function table , but max3227 input conditions there is receiver or driver edge within 30s status, can you help me understand the difference between max3221 and max 3227,now i use max3221, whether to use max3221 directly instead of max3221 ? 

picture 1. 

picture 2.

  • The 3221 automatically powers down when the RS-232 cable is disconnected.
    The 3227 automatically powers down when the RS-232 cable is disconnected or the drivers of the connected peripherals are inactive for more than 30 s.