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MAX14780EESA Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX14780EESA Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 14 page _______________________________________________________________________________________ 9 +5.0V, ±30kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceiver Pin Configuration Pin Description Function Tables R D RO DI VCC B A GND 8 7 6 5 1 + 2 3 4 SO/PDIP RE DE PIN NAME FUNCTION 1 RO Receiver Output. When RE is low and if (A - B) R -50mV, RO is high; if (A - B) P -200mV, RO is low. 2 RE Receiver Output Enable. Drive RE low to enable RO; RO is high impedance when RE is high. Drive RE high and DE low to enter low-power shutdown mode. RE is a hot-swap input (see the Hot-Swap Capability section for details). 3 DE Driver Output Enable. Drive DE high to enable driver outputs. These outputs are high impedance when DE is low. Drive RE high and DE low to enter low-power shutdown mode. DE is a hot-swap input (see the Hot-Swap Capability section for details). 4 DI Driver Input. With DE high, a low on DI forces noninverting output low and inverting output high. Similarly, a high on DI forces noninverting output high and inverting output low. 5 GND Ground 6 A Noninverting Receiver Input and Noninverting Driver Output 7 B Inverting Receiver Input and Inverting Driver Output 8 VCC Positive Supply VCC = +5.0V Q10%. Bypass VCC to GND with a 0.1FF capacitor. TRANSMITTING INPUTS OUTPUTS RE DE DI B A X 1 1 0 1 X 1 0 1 0 0 0 X High-Z High-Z 1 0 X Shutdown RECEIVING INPUTS OUTPUTS RE DE A-B RO 0 X R -50mV 1 0 X P -200mV 0 0 X Open/shorted 1 1 1 X High-Z 1 0 X Shutdown |
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