ARX4435N-FP Просмотр технического описания (PDF) - Aeroflex Corporation
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ARX4435N-FP Datasheet PDF : 6 Pages
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an overriding “INHIBIT” input returns the output
impedance to a high state. A logic “1” applied to the
“INHIBIT” takes priority over the condition of the data
inputs and disables the transmitter (See Transmitter
Logic Waveforms, Figure 1).
The transmitter utilizes an active filter to suppress
harmonics above 1 MHz to meet H009 Macair
specifications. The transmitter may be safely operated
for an indefinite period with the output short circuited
at 100% duty cycle.
Receiver
The Receiver section accepts bi-phase differential
data at the input and produces two TTL signals at the
output. The outputs are DATA and DATA, and
represent positive and negative excursions of the
input beyond a pre-determined threshold (See
Receiver Logic Waveforms, Figure 2).
The internal threshold is nominally set to detect
data bus signals exceeding 1.05 Volts P-P and reject
signals less than 0.6 Volts P-P when used with a 1:1
turns ratio transformer (See Figure 5 for transformer
data and typical connection).
A low level at the Strobe input inhibits the DATA and
DATA outputs. If unused, a 2K pull-up to +5 Volts is
recommended.
Figure 1 - Transmitter Logic Waveforms
Region 1
23
DATA IN
DATA IN
INHIBIT
LINE TO LINE
OUTPUT
Notes: 1. Data and DATA inputs must be complementry 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, (Terminate Mode), Region 3, Transmitter signal
on, low Z.
Figure 2 - Receiver Logic Waveforms
LINE TO LINE
INPUT
Rx DATA OUT
Rx DATA OUT
Note overlap
Note: Waveforms shown are for normally low devices. For normally high receiver output
level devices, the receiver outputs are swapped as shown by the dashed lines
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