Rainbow-electronics MAX13486E Manual de usuario descargar pdf (Pagina 10)

MAX13485E/MAX13486E

Half-Duplex RS-485/RS-422 Transceivers in µDFN

10 ______________________________________________________________________

Pin Description

PIN NAME FUNCTION

1 RO Receiver Output

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 more details).

3DE

Driver Output Enable. Drive DE high to enable the 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 more details).

4DI

Driver Input. Drive DI low to force noninverting output low and inverting output high. Drive DI high to

force noninverting output high and inverting output low (see the Function Tables).

5 GND Ground

6 A Noninverting Receiver Input and Noninverting Driver Output

7 B Inverting Receiver Input and Inverting Driver Output

Positive Supply, V

= +5V ±5%. Bypass V

to GND with a 0.1µF capacitor.

TRANSMITTING

INPUT OUTPUT

RE DE DI B A

X11 0 1

X10 1 0

0 0 X HIGH IMPEDANCE HIGH IMPEDANCE

1 0 X SHUTDOWN

RECEIVING

INPUT OUTPUT

RE DE A-B RO

0X > -50mV 1

0X < -200mV 0

0 X OPEN/SHORT 1

1 1 X HIGH IMPEDANCE

1 0 X SHUTDOWN

Function Tables

X = Don’t care, shutdown mode, driver, and receiver outputs

are in high impedance.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 16

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Rainbow-electronics MAX13486E Manual de usuario Pagina 10