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UM3243EEQA Datasheet(PDF) 10 Page - Union Semiconductor, Inc. |
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UM3243EEQA Datasheet(HTML) 10 Page - Union Semiconductor, Inc. |
10 / 22 page http://www.union-ic.com Rev.01 Mar.2015 10/22 UM3243 Function Tables Table 1. Each Transmitter (Note 2) INPUTS OUTPUT TRANSMITTER STATUS TIN FORCEON FORCEOFF ______________________ VALID RIN RS-232 LEVEL TOUT X X L X Z Forced Power-Off L H H X H Normal Operation with Forced Power-On H H H X L L L H Yes H Normal Operation with Auto Power-On H L H Yes L X L H No Z Auto Power-Off Note 2: H=high level, L=low level, X=irrelevant, Z=high impedance Table 2. Each Receiver (Note 3) INPUTS OUTPUT RECEIVER STATUS RIN FORCEON FORCEOFF ______________________ ROUT X X L Z Forced Power-Off L X H H Normal Operation H X H L Open X H H Table 3. ROUT2B and Outputs INVALID ________________ (Note 3) INPUTS OUTPUTS OUTPUT STATUS VALID RIN RS-232 LEVEL RIN2 FORCEON FORCEOFF ______________________ INVALID _________________ ROUT2B Yes L X X H L Always Active Yes H X X H H Yes Open X X H L No Open X X L L Note 3: H=high level, L=low level, X=irrelevant, Z=high impedance (off), Open=input disconnected or connected driver off |
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