Aeroflex ACT4468D Act4468d dual transceivers for mil-std-1553 Datasheet

ACT4468D
Dual Transceivers for MIL-STD-1553
Features
• World’s smallest and lowest standby power dual
transceiver 0.3" x 1" packages
• Dual transceiver meets military data bus
requirements, MIL-STD-1553 and MIL-STD-1760
• Low power dissipation at full output power
• Single +5V power supply
• Current source output
• Monolithic construction using dielectrically
isolated(D.I.)
• Processed and screened to MIL-STD-883 specs
• DESC SMD# 5962–92061 Pending
CIRCUIT TECHNOLOGY
www.aeroflex.com
General Description
The Aeroflex Circuit Technology
Model ACT4468D is a next
generation D.I. monolithic transceiver
which provide full compliance with
MIL-STD-1553/1760 and data bus
requirements
in
the
smallest
packages with the lowest standby
power consumption and one power
supply operation.
The dual channel Model ACT4468D
perform the front-end analog function
of inputting and outputting data
through
a
transformer
to
a
MIL-STD-1553/1760 data bus.
Design of these transceivers reflects
particular attention to active filter
performance. This results in low bit
and word error rate with superior
waveform purity and minimal zero
crossover
distortion.
Efficient
transmitter electrical and thermal
design provides low internal power
dissipation and heat rise at high as
well as low duty cycles.
Each channel of the dual transceiver
is completely separate from the other
and fully independent. This includes
power leads as well as signal lines.
Hence, each channel may be
connected to a different data bus with
no interaction.
ACT4468D Dual Transceiver
TX/RX
TX DATA IN
DRIVER
SHAPING
TX DATA IN
OUTPUT
STAGE
TX/RX
TX INHIBIT
+5 V
REFERENCE
COMP.
ACTIVE
FILTER
COMP.
RX DATA OUT
GROUND
INPUT
AMP
RX DATA OUT
STROBE
Block Diagram (without Transformer), 1/2 of unit shown
Transmitter:
The Transmitter section accepts
bi-phase TTL data at the input and
when coupled to the data bus with a
1:2.5 transformer, isolated on the
data bus side with two 52.5 Ohm fault
isolation resistors, and loaded by two
70 Ohm terminations plus additional
receivers, the data bus signal
produced is 7.5Volts nominal P-P at
A-A’. (See Figure 5.) When both
DATA and DATA inputs are held low or
high, the transmitter output becomes
eroflex Circuit Technology – Data Bus Modules For The Future © SCD4468D REV B 5/25/00
a high impedance and is “removed”
from the line. In addition, an
overriding “INHIBIT" input provides
for the removal of the transmitter
output from the line. A logic “1”
applied to the “INHIBIT” takes
priority over the condition of the data
inputs and disables the transmitter.
(See Transmitter Logic Waveform,
Figure 1.)
The transceiver utilizes an active
filter to suppress harmonics above
1MHz. The Transmitter may be
safely operated at 100% duty cycle
for an indefinite period into a short
circuited 1553 bus.
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
Waveform. Figure 2.)
CIRCUIT TECHNOLOGY
The pre-set internal thresholds will
detect data bus signals exceeding
1.150 Volts P-P and reject signals
less than 0.6 volts P-P when used
with a 1:2.5 turns ratio transformer.
(See Figure 5 for transformer data
and typical connection.)
Figure 1. Transmitter Logic Waveforms
DATA IN
DATA IN
INHIBIT
LINE TO LINE
OUTPUT
NOTES:
1.DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them.
2.DATA and DATA must be in the same state during off time (both high or low).
Figure 2. Receiver Logic Waveforms
LINE TO LINE
INPUT
DATA OUT
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.
Aeroflex Circuit Technology
2
SCD4468D REV B 5/25/00 Plainview NY (516) 694-6700
Absolute Maximum Ratings
Operating Case Temperature
-55°C to +125°C
Storage Case Temperature
-65°C to +150°C
Positive Power Supply Voltage
-0.3 V to +7.0 V
Receiver Differential Input
±10 V
Receiver Input Voltage (Common Mode)
±5 V
Driver Peak Output Current
650 mA
Total Package Power Dissipation over the Full Operating Case
Temperature Rise
2 Watt
(Note: Normal operation conditions require one
transmitter on and the other off at any given time.
Maximum Junction To Case Temperature Rise for the Hottest
Device
10°C
Thermal Resistance, Junction to Bottom of Case
5°C/W
Electrical Characteristics – Driver Section
Input Characteristics, TX DATA in or TX DATA in
Parameter
Condition
Symbol
Min
Typ
Max
Unit
"0" Input Current
VIN = 0.4 V
IILD
-0.2
-0.4
mA
"1" Input Current
VIN = 2.7 V
IIHD
1
40
µA
0.7
V
"0" Input Voltage
VIHD
"1" Input Voltage
VIHD
2.0
V
Inhibit Characteristics
"0" Input Current
VIN=0.4V
"1" Input Current
VIN=2.7V
IILI
-0.2
-0.4
mA
IIHI
1.0
40
µA
0.7
V
"0" Input Voltage
VILI
"1" Input Voltage
VIHI
V
2
Delay from TX inhibit,(0→1) to inhibited output
tDXOFF
200
300
Delay from TX inhibit, (1→0) to active output
tDXON
80
150
Differential Output Noise, inhibit mode
VNOI
2
10
Differential Output Impedance (inhibited)
Note 1
ZOI
RL=35 Ω
VO
nS
nS
mV p-p
Ω
2K
Output Characteristics
Differential output level
Rise And Fall Times(10% to 90% of p-p output)
Output Offset at point A-A’on Fig 5., 2.5 µS
after midpoint crossing of the parity bit of the
last word of a 660 µS message
tr
RL=35 Ω
Delay from 50% point of TX DATA or TX
DATA input to zero crossing of differential
signal
6.5
7.5
100
170
VOS
8.0
300
±90
tDTX
100
150
V p-p
nS
mV peak
nS
Note 1. Power ON/OFF, measured from 75KHz to 1MHz at Point A-A. See Figure 5
Aeroflex Circuit Technology
3
SCD4468D REV B 5/25/00 Plainview NY (516) 694-6700
Electrical Characteristics – Receiver Section
Parameter
Condition
Differential Voltage Range, Figure 4 Point P-P’
Symbol
Min
Typ
VIDR
Common Mode Rejection Ratio
CMRR
Max
Unit
20
V peak
45
dB
Strobe Characteristics (Logic "0" inhibits output) if not used, a 1K pullup to 5 V is recommended
"0" Input Current
VS=0.4 V
IIL
-0.2
-0.4
mA
"1" Input Current
VS=2.7V
IIH
1
+40
µA
0.7
V
"0" Input Voltage
VIL
"1" Input Voltage
VIH
V
2.0
Strobe Delay (turn-on)
tSD(ON)
40
100
nS
Strobe Delay (turn-off)
tSD(OFF)
60
100
nS
1.15
V p-p
Threshold Characteristics (Sinewave input )
100KHz1MHz
Input Threshold Voltage(referred to the bus)
VTH
0.60
0.8
2.5
3.7
Output Characteristics, RX DATA and RX DATA
"1" State
IOH=-0.4 mA
VOH
"0" State
IOL = 4 mA
VOL
0.3
0.5
V
tDRX
250
400
nS
Delay, (average)from differential input zero
crossings to RX DATA and RX DATA output
50% points
V
Power Data
Maximum Currents, Per Channel (+5V)
Duty Cycle
Typ
Max
Transmitter Standby
20 mA
30 mA
25% duty cycle
155 mA
185 mA
50% duty cycle
290 mA
335 mA
100% duty cycle
560 mA
650 mA
Power Supply Voltage
+V
4.75 to 5.5 Volts
Note 2. Vcc= 5 volts ±0.1 V, for all measurements unless otherwise specified.
Note 3. Specifications apply over the case temperature range of -55°C to +125°C unless otherwise specfied.
Note 4. All typical values are measured at +25°C
Aeroflex Circuit Technology
4
SCD4468D REV B 5/25/00 Plainview NY (516) 694-6700
Figure 3 – Transmitter (TX) Output Waveform
Figure 4 – Transmitter (TX) Output Offset
LAST BIT
tf*
90%
Magnified View
OUTPUT OFFSET*
6V P-P MIN
7.7V P-P MAX
0 Volts
0 volts
OUTPUT OFFSET*
10%
2.5 µsec
tr*
*Offset measured at point A-A’ in Fig 5
* Rise and fall times measured at point A-A’ in Fig 5
Figure 6 – Power Dissipation vs. Duty Cycle
(Total hybrid with one channel transmitting
and the other not powered)
Figure 5 – Typical Transformer Connection
70Ω
70Ω
ZO
52.5Ω
1:2.5
P
B
A
D.U.T
TX DATA OUT
Center
Tap
P’
1:1.77 for
stub
coupling
A’
B’
52.5Ω
POWER DISSIPATION
MILLIWATTS
TX DATA OUT
1600
1400
1200
Maximum
1000
800
Typical
600
400
RX DATA IN
200
RX DATA IN
0
0
10
20
30
40
50
60
70
80
90 100
DUTY CYCLE – PERCENT
Note: Vcc = 5 Volts, Vbus (pt A-A') at 7.5 Volts P-P
Configurations and Ordering Information
DESC No.
Receiver Data level
Case
Configuration
ACT4468D
5962-92061(Pending)
Normally Low
DIP Package
Dual
ACT4468DF
5962-92061(Pending)
Normally Low
Flat Package
Dual
ACT4468DI
5962-92061(Pending)
Normally High
DIP Package
Dual
ACT4468DFI
5962-92061(Pending)
Normally High
Flat Package
Dual
Model No.
Aeroflex Circuit Technology
5
SCD4468D REV B 5/25/00 Plainview NY (516) 694-6700
C I R C U I T T E C H N O L O G YCIRCUIT TECHNOLOGY
Package Outline Drawings
"FLAT Package"
.990
1.010
.890
.910
ESD Triangle
Identifies Pin 1
20
Pin #’s & Functions
.008
.012
11
.290
.310
10
1
+5Vdc A
2
TX/RX A
3
TX/RX A
4
STROBE A
5
GROUND A
6
+5Vdc B
7
TX/RX B
8
TX/RX B
9
STROBE B
10
GROUND B
11
RX DATA OUT B
12
RX DATA OUT B
13
TX INHIBIT B
14
TX DATA IN B
15
TX DATA IN B
16
RX DATA OUT A
17
RX DATA OUT A
18
TX INHIBIT A
19
TX DATA IN A
20
TX DATA IN A
.400
.016
.020
.050
.075
.098
.122
"DIP Package"
.990
1.010
20
11
.287
.303
.300
10
.008
.012
ESD Triangle
Identifies Pin 1
.025
.045
.150
.MIN
.098
.122
.100
BSC
.05
Notes
1. Dimensions shown are in inches
.016
.020
.890
.910
Specifications subject to change without notice.
Aeroflex Circuit Technology
35 South Service Road
Plainview New York 11803
Aeroflex Circuit Technology
Telephone: (516) 694-6700
FAX:
(516) 694-6715
Toll Free Inquiries: 1-(800)THE-1553
6
SCD4468D REV B 5/25/00 Plainview NY (516) 694-6700
Similar pages