Rainbow-electronics MAX3079E Manuale Utente Scaricare il pdf (Pagina 11)

MAX3070E–MAX3079E

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

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

______________________________________________________________________________________ 11

Test Circuits and Waveforms (continued)

RECEIVER

OUTPUT

ATE

Figure 6. Receiver Propagation Delay Test Circuit

1.5V

RPLH

RPHL

+1V

-1V

THE RISE TIME AND FALL TIME OF INPUTS A AND B < 4ns

Figure 7. Receiver Propagation Delays

S1 OPEN

S2 CLOSED

S3 = +1.5V

/ 2

S1 OPEN

S2 CLOSED

S3 = +1.5V

RHZ

0.25V

1.5V

S1 CLOSED

S2 OPEN

S3 = -1.5V

1.5V

S1 CLOSED

S2 OPEN

S3 = -1.5V

RLZ

1.5V

0.25V

GENERATOR

+1.5V

1kΩ

15pF

50Ω

-1.5V

RZH

, t

RZH(SHDN)

RZL

, t

RZL(SHDN)

+ V

) / 2

Figure 8. Receiver Enable and Disable Times

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 24 25

MAX3070E–MAX3079E 1

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Rainbow-electronics MAX3079E Manuale Utente Pagina 11

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