Rainbow-electronics MAX3079E Manual do Utilizador descarregar pdf (Página 13)

MAX3070E–MAX3079E

+3.3V, ±15kV ESD-Protected, Fail-Safe,

Hot-Swap, RS-485/RS-422 Transceivers

______________________________________________________________________________________ 13

MAX3070E/MAX3073E/MAX3076E

Pin Description (continued)

MAX3070E

MAX3073E

MAX3076E

MAX3071E

MAX3074E

MAX3077E

MAX3072E

MAX3075E

MAX3078E

MAX3079E

FULL-DUPLEX

DEVICES

HALF-

DUPLEX

DEVICES

FULL-

DUPLEX

MODE

HALF-

DUPLEX

MODE

NAME FUNCTION

12 8 — 12 — A Noninverting Receiver Input

— ———12 A Receiver Input Resistors*

——6 ——A

Noninverting Receiver Input and Noninverting Driver

Output

———13 13 RXP

Receiver Phase. Connect RXP to GND or leave

unconnected for normal transmitter phase/polarity.

Connect to V

to invert receiver phase/polarity.

14 1 8 14 14 V

Positive Supply V

= 3.3V ±10%. Bypass V

to GND

with a 0.1µF capacitor.

1, 8, 13 ————N.C.

No Connect. Not internally connected. Can be connected

to GND.

*MAX3079E only. In half-duplex mode, the driver outputs serve as receiver inputs. The full-duplex receiver inputs (A and B) still have a

1/8-unit load, but are not connected to the receiver.

TRANSMITTING

INPUTS OUTPUTS

RE DE DI Z Y

X1101

X1010

0 0 X High-Z High-Z

1 0 X Shutdown

RECEIVING

INPUTS OUTPUT

RE DE A, B RO

0X≥ -50mV 1

0X≤ -200mV 0

Open/

shorted

1 1 X High-Z

1 0 X Shutdown

MAX3071E/MAX3074E/MAX30767E

TRANSMITTING

INPUT OUTPUTS

DI Z Y

101

010

RECEIVING

INPUTS OUTPUT

A, B RO

≥ -50mV 1

≤ -200mV 0

Open/shorted 1

Function Tables

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 24 25

MAX3070E–MAX3079E 1

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