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MAX3440EAPA+ Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX3440EAPA+ Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 19 page ±15kV ESD-Protected, ±60V Fault-Protected, 10Mbps, Fail-Safe RS-485/J1708 Transceivers ______________________________________________________________________________________ 11 Function Tables INPUTS OUTPUTS A-B VID DIFFERENTIAL INPUT VOLTAGE COMMON-MODE VOLTAGE RO FAULT CONDITIONED BY DELAY FAULT CONDITION ≥0.45V 1 0 Normal operation <0.45V and ≥0.27V 1 Indeterminate Indeterminate <0.27V and ≥-0.05V 1 1 Low-input differential voltage ≤-0.05V and ≥-0.2V Indeterminate (Note 1) 1 Low-input differential voltage ≤-0.2V and >-0.27V 0 1 Low-input differential voltage ≤-0.27V and >-0.45V 0 Indeterminate ≤-0.45V ≤12V and ≥-7V 00 Indeterminate X <-7V or >+12V Indeterminate 1 Outside common-mode voltage range Table 1. MAX3440E/MAX3441E Fault Table X = Don’t care. Note 1: Receiver output may oscillate with this differential input condition. TRANSMITTING INPUTS OUTPUTS DE/RE DI A B 0 X High-Z High-Z 10 01 11 10 Table 2. MAX3440E/MAX3441E (RS-485/RS-422) X = Don’t care. TRANSMITTING INPUTS OUTPUTS RE DE DI A B 0 0 X High-Z High-Z 01 001 01 110 1 0 X Shutdown Shutdown 11 001 11 110 Table 3. MAX3442E/MAX3443E (RS-485/RS-422) X = Don’t care. TRANSMITTING INPUTS OUTPUTS CONDITIONS TXD DE AB — 0 1 High-Z High-Z — 1 1 High-Z High-Z — 0 0 0 1 Dominant state 1 0 High-Z High-Z Recessive state Table 4. MAX3444E (J1708) Application RECEIVING INPUTS OUTPUTS DE/RE (A - B) RO 0 ≥-0.05V 1 0 ≤-0.2V 0 0 Open/shorted 1 1 X High-Z Table 5. MAX3440E/MAX3441E (RS-485/RS-422) X = Don’t care. |
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