BUS-8559 Datasheet, PDF (1/4 Pages) List of Unclassifed Manufacturers – VARIABLE OUTPUT MIL-STD-1553 TRANSCEIVER

BUS-8559
VARIABLE OUTPUT
MIL-STD-1553 TRANSCEIVER
DESCRIPTION
Designed specifically for use in auto-
matic test equipment where a variable
transmitter output level is required,
the DDC Model BUS-8559 transceiv-
er is a complete transmitter and
receiver conforming to MIL standards
1553A and 1553B.
The receiver section accepts phase-
modulated bipolar data at the input
and produces a bi-phase TTL signal
at the output, see FIGURE 1.
Outputs, DATA and DATA, are posi-
tive and negative excursions of the
input beyond an internally fixed
threshold. The positive and negative
thresholds are internally set at the
factory for a nominal 1 V pk-pk signal,
when measured at point “A” in FIG-
URE 2. An external strobe input is
provided which allows the the receiv-
er to be removed from the line. A logic
“0” applied to RECEIVER STROBE
will disable the receiver output.
The BUS-8559 transmitter section
accepts bi-phase TTL data at the
input and produces a nominal 0 to 27
V pk-pk differential output across a
145 Ω load. When the transmitter is
coupled to the data bus with the spec-
ified transformer*, and isolated (on the
data side) with two 55 Ω fault isolation
resistors, and loaded with two 70 Ω
terminations (plus additional
receivers), the data bus signal pro-
duced is a nominal 0 to 7.5 V pk-pk
when measured at the output side of
the 55 Ω resistors.
When both DATA and DATA, inputs
are held low or high, the transmitter
presents a high impedance to the
line. An external inhibit input is also
provided, which allows the the trans-
mitter output to be removed from the
line.. When a logic “1” is applied to the
TX INHIBIT input, the transmitter is
disabled, and the data inputs are
ignored.
APPLICATION
The BUS-8559 is suitable for any
MIL-STD-1553 application which
requires a transceiver. The BUS-8559
comes in a hermetic, 24-pin DDIP
package which measures 1.4 x 0.8 x 0.2
inches.
FEATURES
• ^{Variable Transmitter Output}
• ^{Transmitter/Receiver in a Single}
24-Pin DDIP Hybrid
• ^{Very Low Power Dissipation}
• ^{Improved Receiver Filtering}
Enhances System Bit Error Rate
• ^{Meets MIL-STD-1553A and 1553B}
• ^{Power Supplies:}
±15 V or
+15 V and -12 V
BUS-25679
TRANSFORMER
DATA
DATA
VAR VCC
-15 +15 +5 (O to +15 V)
TRANSCEIVER
COMPARATOR
LIMITER
FILTER
DRIVER
COMPARATOR
SHAPING
NETWORK
DRIVER
SHAPING
NETWORK
BUS-8559
RECEIVER
STROBE
RX DATA
RX DATA
TX DATA
TX DATA
TX INHIBIT
© ^{1999 Data Device Corporation}
BUS-8559 BLOCK DIAGRAM