BU-63147, BU-63157 and BU-63149
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®
MIL-STD-1553 DATA BUS
+5V DUAL TRANSCEIVER
FEATURES
•
+5V Power Supply
•
Low Power
•
Conforms Fully To MIL-STD-1553A
and 1553B
•
Dual Transceiver
•
Available with MIL-STD-1760
Compliant Transmitter Voltage
•
Available with McAir Compatible
Waveform
•
36-Pin DIP or Flat Pack
•
HARRIS or SMITHS I/O
Compatibility
DESCRIPTION
The BU-63147/157/149 transceiver is a complete dual transmitter and receiv-
er pair conforming fully to MIL-STD-1553A and 1553B. Features include:
monolithic design, +5V power supply voltage, Harris or Smiths type decoder
interface, completely independent dual redundant operation, and small size
(36-pin DIP or flat pack). The receiver section of the BU-63147/157/149
series accepts phase-modulated bipolar data from a MIL-STD-1553 Data
Bus and produces TTL Signal data at its output.
The RX DATA OUT and RX DATA OUT outputs represent positive and nega-
tive variations of the input data signals beyond an internally fixed threshold
level. An external STROBE input enables or disables the receiver’s outputs.
The transmitter section accepts bi-phase TTL signal data at its
TX DATA IN and TX DATA IN inputs and produces phase-modulated
bipolar data at the TX DATA OUT and TX DATA OUT outputs. The transmit-
ter’s output voltage level is typically about 11Vpp. An external input, INHIBIT,
takes priority over the transmitter inputs and disables the transmitter when
activated with a logic “1”.
The small size, +5V power supply voltage, and compliance with MIL-STD-
1553 simplify engineering design, making it an excellent choice for interfac-
ing with any MIL-STD-1553 system.
•
Radiation Tolerant Version Available
FOR MORE INFORMATION CONTACT:
Data Device Corporation
105 Wilbur Place
Bohemia, New York 11716
631-567-5600 Fax: 631-567-7358
www.ddc-web.com
Technical Support:
1-800-DDC-5757 ext. 7771
All trademarks are the property of their respective owners.
©
2000 Data Device Corporation
Data Device Corporation
www.ddc-web.com
+5 V
RECEIVER STROBE
BI PHASE
TTL DATA
COMPARATOR
FILTER
RX DATA OUT
RX DATA OUT
RX DATA IN
FILTER
COMPARATOR
DECODER
PHASE MODULATED
BIPOLAR DATA
RECEIVER SECTION
RX DATA IN
TRANSMITTER SECTION
TX Data Out
SHAPING
NETWORK
TX DATA IN
TX Data Out
SHAPING
NETWORK
ENCODER
TX DATA IN
CASE/GND
TX INHIBIT
1553
DATA
BUS
SHORT OR
LONG STUB
COUPLING
ISOLATION
TRANSFORMER
2
BU-63147/49
H-11/06-0
FIGURE 1. BU-63147/-157/-149 BLOCK DIAGRAM (ONE CHANNEL SHOWN)
TABLE 1. BU-63147/157/149 SPECIFICATIONS
PARAMETER
ABSOLUTE MAXIMUM RATING
Supply Voltage
• +5 V (Vcc)
Receiver
• Input Voltage (differential)
Logic
• Voltage Input Range
RECEIVER
Differential Input Resistance
(Notes 1-6)
Differential Input Capacitance
(Notes 1-6)
Threshold Level (Note 7)
Common Mode Voltage (Note 8)
TRANSMITTER
Differential Output Voltage
• Direct Coupled Across 35 ohms,
Measured on Bus
• Transformer Coupled Across
70 ohms, Measured on Stub:
• BU-63147/157XX-XX0
• BU-63147X3-XX2 (Note 9)
Output Noise, Differential (Direct
Coupled)
Output Offset Voltage, Transformer
Coupled Across 70 ohms
Rise/Fall Time
• BU-63147/157X3
• BU-63147X4
LOGIC
V
IH
V
IL
I
IH
Tx
Data In
, Tx
Inhibit
, Rx
Strobe
I
IL
Tx
Data In
, Tx
Inhibit
, Rx
Strobe
V
OH
(Vcc=4.75V,I
OH
=max)
V
OL
(Vcc=4.75V,I
OH
=max)
I
OL
I
OH
POWER SUPPLY REQUIREMENTS
Voltages/Tolerances
• +5V
Current Drain (Total Hybrid)
BU-63147/157/9XX-XX0
• Idle (Both Channels)
• 25% Transmitter Duty Cycle
(One Channel)
• 50% Transmitter Duty Cycle
(One Channel)
• 100% Transmitter Duty Cycle
(One Channel)
BU-63147/9X3-XX2
• Idle (Both Channels)
• 25% Transmitter Duty Cycle
(One Channel)
• 50% Transmitter Duty Cycle
(One Channel)
• 100% Transmitter Duty Cycle
(One Channel)
MIN
TYP
MAX
UNITS
TABLE 1. BU-63147/157/149 SPECIFICATIONS (CONT.)
PARAMETER
POWER DISSIPATION (NOTE 10)
Total Hybrid
BU-63147/157/9XX-XX0
• Idle (Both Channels)
• 25% Transmitter Duty Cycle
(One Channel)
• 50% Transmitter Duty Cycle
(One Channel)
• 100% Transmitter Duty Cycle
(One Channel)
BU-63147/9X3-XX2
• Idle (Both Channels)
• 25% Transmitter Duty Cycle
(One Channel)
• 50% Transmitter Duty Cycle
(One Channel)
• 100% Transmitter Duty Cycle
(One Channel)
Hottest Die
BU-63147/157/9XX-XX0
• Idle (Both Channels)
• 25% Transmitter Duty Cycle
(One Channel)
• 50% Transmitter Duty Cycle
(One Channel)
• 100% Transmitter Duty Cycle
(One Channel)
BU-63147/9X3-XX2
• Idle (Both Channels)
• 25% Transmitter Duty Cycle
(One Channel)
• 50% Transmitter Duty Cycle
(One Channel)
• 100% Transmitter Duty Cycle
(One Channel)
THERMAL
• Thermal Resistance, Junction-to-
Case, Hottest Die (θ
JC
)
• Operating Junction Temperature
• Storage Temperature
• Lead Temperature
(soldering, 10 sec.)
PHYSICAL CHARACTERISTICS
Size
36-Pin DIP
MIN
TYP
MAX
UNITS
-0.3
5.0
7.0
20
V
Vp-p
V
kohm
0.55
0.78
1.00
1.44
W
W
W
W
-0.3
2.5
Vcc+10%
5
0.20
0.860
10
pF
Vp-p
Vpeak
0.55
0.84
1.13
1.70
W
W
W
W
6
7
9
Vp-p
18
20
20
22
27
27
10
250
-250
150
Vp-p
Vp-p
mVp-p,
diff
mVp-p,
diff
ns
ns
V
V
µA
µA
V
V
mA
mA
0.28
0.51
0.75
1.22
W
W
W
W
100
200
2.0
20
-100
2.4
150
250
300
300
0.28
0.58
0.88
1.48
W
W
W
W
0.8
100
-20
12
-55
-65
150
150
+300
°C/W
°C
°C
°C
0.4
3.4
-3.4
4.75
5.0
5.5
V
100
205
310
520
mA
mA
mA
mA
1.900 x .800 x .205
(48.26 x 20.32 x 5.21)
1.900 x .800 x .200
(48.26 x 20.32 x 5.08)
0.6
(17)
in.
(mm)
in.
(mm)
oz
(g)
36-Lead Flat pack
Weight
Notes:
100
216
332
565
mA
mA
mA
Notes 1 through 6 are applicable to the Receiver Differential Resistance and
Differential Capacitance specifications:
(1) Specifications include both transmitter and receiver (assumed tied together
mA
externally).
(2) Impedance parameters are specified directly between pins TX/RX A(B) and
TX/RX A(B) hybrid.
(3) It is assumed that all power and ground inputs to the hybrid are connected and
that the hybrid case is connected to ground for the impedance measurement.
Data Device Corporation
www.ddc-web.com
3
BU-63147/49
H-11/06-0
Notes (continued)
(4) The specifications are applicable for both unpowered and powered conditions.
(5) The specifications assume a 2 volt rms balanced, differential, sinusoidal
input. The applicable frequency range is 75 kHz to 1 MHz.
(6) Minimum resistance and maximum capacitance parameters are guaranteed
over the operating range, but are not tested.
(7) The Threshold Level, as referred to in this specification, is meant to be the
maximum peak-to-peak voltage (measured on the data bus) that can be
applied to the receiver's input without causing the output to change from the
OFF state.
(8) Assumes a common mode voltage within the frequency range of dc to 2
MHz, applied to pins of the isolation transformer on the stub side (either
direct or transformer coupled), and referenced to transceiver ground.
Transformer must be a DDC recommended transformer or other transformer
that provides an equivalent minimum CMRR.
(9) MIL-STD-1760 requires minimum output voltage of 20 Vp-p on the stub con-
nection. The -XX2 option is
not
available for the BU-63147X4 or BU-63157
versions.
(10) Power dissipation specifications assume a transformer coupled configuration,
with external dissipation (while transmitting) of 0.14 watts for the active isola-
tion transformer, 0.08 watts for the active coupling transformer, 0.45 watts for
each of the two bus isolation resistors, and 0.15 watts for each of the two bus
termination resistors.
TABLE 3. HIGH RELIABILITY SCREENING OPTIONS
FOR BU-63157 (CONT.)
ELEMENT EVALUATION
ASSEMBLY & TEST
Particle Impact Noise
Detection (PIND)
320-Hour Burn-In
(Standard on this device)
100% Non-Destructive
Wirebond Pull
(Standard on this device)
Radiographic (X-Ray)
Analysis
QCI TESTING
Extended Temperature
Cycling:
20 Cycles Including
Radiographic (X-Ray)
Testing
Moisture Content Limit of
5000 PPM
MIL-STD-883, Method 2020
Condition A
MIL-STD-883, Method 1015
METHOD
MIL-STD-883, Method 2023
MIL-STD-883, Method 2012
MIL-STD-883, Method 1010 Condition C
and MIL-STD-883, Method 2012
TABLE 2. BU-63157 RADIATION SPECIFICATIONS*
PART NUMBER
BU-63157X3
TOTAL DOSE
100 KRAD
SINGLE EVENT
LATCHUP
IMMUNE
MIL-STD-883, Method 1018
*Note: Radiation parameters specified on this data sheet are derived from initial
qualification testing by DDC and published data from ASIC manufacturers. These
devices have not been evaluated for compliance to the RHA requirements stipu-
lated in MIL-PRF-38534, Appendix G.
INTRODUCTION
The BU-63147/157/49 is a dual redundant transmitter and
receiver packaged in a 36-pin DDIP or flat pack. It is directly
compatible to Harris 15530 encoder/decoder and has internal
(factory preset) threshold levels. The dual transceiver only
requires +5V power and conforms to MIL-STD-1553A and
1553B. For McAir compatibility, versions are available with
rise/fall times of 200 to 300 nsec.
Figure 3 illustrates the connection between a BU-63147/157/49
transceiver and a MIL-STD-1553 Data Bus. After transformer
isolating the transceiver, it can be either direct coupled (short
stub) or transformer coupled (long stub) to the Data Bus.
TABLE 3. HIGH RELIABILITY SCREENING OPTIONS
FOR BU-63157
ELEMENT EVALUATION
Visual Inspection:
Integrated Circuits
Transistor & Diodes
Passive Components
METHOD
MIL-STD-883, Method 2010 Condition A
MIL-STD-750, Method 2072 and 2073
MIL-STD-883, Method 2032 Class S
SEM Analysis for Integrated MIL-STD-883, Method 2018
Circuits
Element Evaluation:
Visual, Electrical, Wire
Bondability, 24-Hour
Stabilization Bake, 10
Temperature Cycles,
5000 g’s constant accelera-
tion, 240-Hour Powered
Burn-In and 1000-Hour Life
Test (Burn-In and 1000-
Hour Life Test are Only
Required for Active
Components.)
TRANSMIT OPERATING MODE
The transmitter section accepts encoded TTL data and converts
it to phase-modulated bipolar form using a waveshaping network
and driver circuits. The driver outputs TX DATA OUT and TX
DATA OUT are transformer coupled to the Data Bus.
The transmitter output terminals can be put into a high imped-
ance state by setting INHIBIT high, or setting TX DATA IN and TX
DATA IN to the same logic level. The operating modes are shown
in TABLE 4.
MIL-PRF-38534
Data Device Corporation
www.ddc-web.com
4
BU-63147/49
H-11/06-0
TABLE 4. TRANSMIT OPERATING MODE
TX DATA IN
X
0
0
1
1
TX DATA IN
X
0
1
0
1
TX INHIBIT
H
X
L
L
X
DRIVER OUTPUT
OFF (NOTE)
OFF
TX DATA OUT ON,
TX DATA OUT OFF
TX DATA OUT ON,
TX DATA OUT OFF
OFF
BU-63147/157
NOTE: DRIVER OUTPUT terminals are in the high impedance mode during
OFF time, independent of INHIBIT status.
RX Data Out
RX Data Out
LINE-TO-LINE
OUTPUT
LINE-TO-LINE
INPUT
ENCODER
OUTPUT
(NOTE 2)
TX Data In
TX Data In
XXX
XXX
X X X
X X X
RX Data Out
BU-63149
RX Data Out
The transceivers are able to operate in a “wraparound” mode.
This allows output data to be monitored by the receiver section
and returned to the decoder where it is checked for errors.
RECEIVER OPERATING MODE
The receiver section accepts data from a MIL-STD-1553 Data
Bus when coupled to the Data Bus as shown in FIGURE 3. This
data is converted to bi-phase TTL and furnished to
RX DATA OUT and RX DATA OUT.
When STROBE is high data passes through the receiver to
RX DATA OUT and RX DATA OUT. Applying a low to STROBE
disables the receiver output terminals.
As illustrated in FIGURE 2, the receiver in the BU-65147/157
provides compatibility to the Harris decoder, while the BU-63149
provides compatibility to the Smiths decoder.
Notes:
(1) TX Data In and RX Data Out are TTL signals.
(2) TX Data In inputs must be at opposite logic levels during transmission, and at
the same logic level when not transmitting.
(3) LINE-TO-LINE output voltage is measured between TX Data Out and TX Data Out.
(4) LINE-TO-LINE input voltage is measured on the Data Bus.
FIGURE 2. WAVEFORMS FOR HARRIS/SMITHS
TYPE ENCODER/DECODERS
WAVEFORMS
FIGURE 2 illustrates the BU-63147/157 with Harris type decoder
interface and the BU-63149 with Smiths type decoder interface.
Note that DATA and DATA inputs must be complementary wave-
forms with a 50% duty cycle.
Data Device Corporation
www.ddc-web.com
5
BU-63147/49
H-11/06-0
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