SCD4480-DFI Rev B 2/27/2013

5

Aeroflex Plainview

DATA

DATA

INHIBIT

OUTPUT

X

X

H

High Z

H

H

L

Low Z (No signal)

L

L

L

H

L

L

Low Z (Signal)

L

H

L

FIGURE 1

– TX OUTPUT TRUTH TABLE

Notes: 1. Data and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them, and in the

same state during the off time (both high and low).

2. Region 1; no output signal, High Z state, (Receive Mode), Region 2; No Output signal, Low Z state, Region 3; Transmitter signal

on, low Z (Transmitter mode), Region 4; No Output signal, Low Z state, (Terminate Mode).

FIGURE 2

– TRANSMITTER LOGIC WAVEFORMS