AEROFLEX ACT4489-DF

ACT 4489 DUAL TRANSCEIVER
FOR MIL-STD-1553/1760
Features
CIRCUIT TECHNOLOGY
www.aeroflex.com/act1.htm
• +5 / ±12 Volt Supply Operation
General Description
• Low Power Dissipation
• Small Size & Light Weight
• Dual Transceivers Saves Space & Cost
• Outstanding MIL-STD-1553 performance
• Radiation Hard Dielectric Isolation Monolithic
Construction for Severe Environments
• Superior High Frequency Line Transient and Input
Ripple Rejection
• Input and Output TTL Compatible Design
• Processed and Screened to MIL-STD-883 Specs
• MIL-PRF-38534 Compliant Devices Available
TX DATA OUT
TX DATA IN
DRIVER
TX DATA IN
ACTIVE
FILTER
OUTPUT
STAGE
REFERENCE
COMP.
TX DATA OUT
TX INHIBIT IN
+5V (VL)
+12V (VCC)
-12V (VEE)
RX DATA OUT
GND1
GND2
Transmitter:
GND3
RX DATA IN
RX DATA IN
The
Aeroflex
Circuit
Technology ACT 4489 is a next
generation monolithic transceiver
design
which
provides
full
compliance to MIL-STD-1553A/B
and 1760 requirements in a small
package
with
low
power
consumption.
The ACT 4489 series performs
the front-end analog function of
inputting and outputting data
through a transformer to the
MIL-STD-1553 data bus.
Design of this transceiver 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.
INPUT
AMPLIFIER
ACTIVE
FILTER
RX DATA OUT
COMP.
CASE
RX STROBE IN
Block Diagram (Without Transformer)
The Transmitter section accepts
bi-phase TTL data at the input and
when coupled to the data bus with a
1:1 ratio transformer, isolated on
the data bus side with two 52.5
Ohm fault isolation resistors, and
loaded
by
two
70
Ohm
eroflex Circuit Technology – Data Bus Modules For The Future © SCD4489D REV A 1/30/98
terminations, the data bus signal is
typically 7 Volts P-P at point A (See
Figure 5). When both DATA and
DATA inputs are held low or high,
the transmitter output becomes 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”
signal applied to the “INHIBIT” takes
priority over the condition of the
data inputs and disables the
transmitter (See Transmitter Logic
Waveform,
Figure 1).
The
Transmitter may be safely operated
for an indefinite period with the bus
(point A) 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 Waveform,
Figure 2).
The pre-set internal thresholds
will detect data bus signals, point
A Figure 5, exceeding 1.20 Volts
P-P and reject signals less than
0.6 Volts P-P when used with a
transformer (See Figure 5 for
transformer data and typical
connection).
A low level at the RX Strobe
input inhibits the DATA and
DATA outputs. If unused, a 2K
pull-up to +5 Volts
is
recommended.
Figure 1 — Transmitter Logic Waveforms Idealized
DATA IN
DATA IN
INHIBIT
LINE TO LINE
OUTPUT
Note: DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them,
and must be in the same state during off times (both high or low).
Figure 2 — Receiver Logic Waveforms Idealized (ACT4489D)
LINE TO LINE
INPUT
STROBE
DATA OUT
DATA OUT
Note overlap
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2
SCD4489D REV A 1/30/98 Plainview NY (516) 694-6700
Absolute Maximum Ratings
Operating case temperature
-55°C to +125°C
Storage case temperature
-65°C to +150°C
Power supply voltage
VCC
VEE
VL
-0.3 V to +18 V
+0.3 V to-18 V
-0.3 V to +7.0 V
Logic input voltage
-0.3 V to +5.5 V
±40 VP-P
Receiver differential input
Receiver input voltage (common mode)
±10 V
Driver peak output current
300 mA
Total package power dissipation over the full operating
case temperature rise
2.5 Watts
(Note: Normal operation conditions require one
transceiver on and the other off)
Maximum junction to case temperature
10°C
Thermal resistance – junction to case
4°C/W
Electrical Characteristics — Driver Section
Input Characteristics, TX DATA IN or TX DATA IN (Notes 2 & 3 apply)
Parameter
Condition
"0" Input Current
VIN = 0.4 V
"1" Input Current
VIN = 2.7 V
Symbol
Typ
Max
Unit
IILD
-0.1
-0.2
mA
IIHD
1
40
µA
0.7
V
"0" Input Voltage
VIHD
"1" Input Voltage
VIHD
Min
2.0
V
Inhibit Characteristics
"0" Input Current
"1" Input Current
VIN = 0.4 V
IILI
-0.1
-0.2
mA
VIN=2.7V
IIHI
1.0
40
µA
0.7
V
"0" Input Voltage
VILI
"1" Input Voltage
VIHI
Delay from TX inhibit, (0→1) to inhibited output
Delay from TX inhibit, (1→0) to active output
From mid pt
inhibit to
±1.2V pt B,
See Figure 5
Differential output noise, inhibit mode
Differential output impedance (inhibited) Note 1
See Figure 5
V
2.0
tDXOFF
175
225
tDXON
90
150
VNOI
2
10
nS
nS
mVP-P
Point B
ZOI
2K
Ω
Point C
ZOI
1K
Ω
Point A
VO
6
7
9
Point A
tr
100
160
300
nS
Point A
VOS
± 90
mV peak
Point A
tDXT
200
nS
Output Characteristics
Differential output level, See Figure 5
See Figure 5
Rise and fall times(10% to 90% at pt A output)
See Figure 5
Output offset, Figure 3, 2.5µS after midpoint
crossing of the parity bit of the last word of a 660µS
message See Figure 5
Delay from 50% point of TX DATA or TX DATA input
to zero crossing of differential signal. See Fig 5
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3
100
VP-P
SCD4489D REV A 1/30/98 Plainview NY (516) 694-6700
Electrical Characteristics — Receiver Section
Parameter
Differential Receiver Input Voltage Range
(See Figure 5, Point B)
Condition
Symbol
TXFMR
1:1
VIDR
Common Mode Rejection Ratio (Note 3)
CMRR
Min
Typ
Max
Unit
40
VP-P
45
dB
"1" State – Rx Data or Rx Data Output
IOH = -0.4 mA
VOH
"0" State – Rx Data or Rx Data Output
IOI = 4 mA
VOL
0.35
0.5
V
tDXT
270
400
nS
0.75
1.20
VP-P
Delay (average) from Differential Input Zero
Crossings to RX DATA and RX DATA Output
50% points
Input Threshold Voltage (referred to the bus)
100KHz–1MHz
VTH
2.5
0.60
3.7
V
Strobe Characteristics (Logic "0" Inhibits Output)
"0" Input Current
VS=0.4V
IIL
-0.1
"1" Input Current
VS=2.7V
IIH
1
-0.2
mA
+40
µA
0.7
V
"0" Input Voltage
VIL
"1" Input Voltage
VIH
Strobe Delay (Turn-on or Turn-off)
tSD
50
100
ICC
IEE
IL
ICC
IEE
IL
ICC
IEE
IL
ICC
IEE
IL
0
12
18
1
16
30
58
12
18
115
12
18
230
12
18
63
20
30
V
2.0
nS
Power Data
Power Supply Currents – Per Channel – See Figure 4
Transmitter Standby
25% duty cycle
50% duty cycle
100% duty cycle
mA
125
20
30
250
20
30
Power Supply Voltages
±12V Operating Power Supply Voltage Range
VCC
VEE
+5V Operating Power Supply Voltage Range)
VL
+11.40 +12.00 +12.60
-11.40 -12.00 -12.60
V
+4.50
V
+5.00
+5.50
Note 1. Power on or off, measured from 75KHz to 1MHz at point A and transformer self impedance of 3KΩ minimum
at 1MHz.
Note 2. Power Supplies: ±12 Volts ±0.60 V & +5 Volts ±0.5 V, bypassed by 10 µF (Tantalum recommended)
Capacitor minimum. All measurements & specifications apply over the temperature range of -55°C to +125°C
(case temperature) unless otherwise specified.
Note 3. When measured as shown per Figure 5 with ± 10 Volt peak, line to ground, DC to 2MHz
Note 4. Typical power is measured with VBUS at point A = 7 VP-P
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SCD4489D REV A 1/30/98 Plainview NY (516) 694-6700
Figure 3 – Transmitter (TX) Output Offset
Figure 5 – Typical 1553 Bus Connections
LAST BIT
Transformer Coupled Stub
70Ω
Magnified View
ACT 4489
OUTPUT OFFSET
*
OUTPUT OFFSET
*
TX DATA OUT
0 Volts
2
TX DATA OUT
2.5 µsec
1 : 1.4 52.5Ω
1 : 0.707
3
7
C
A
1
5
T1553-1
52.5Ω
RX DATA IN
Zoi
VCM
RX DATA IN
*Offset measured at point A in Figure 5
Direct Coupled Stub
Figure 4 – Hybrid Power Dissipation vs. Duty Cycle
(Total hybrid with one channel transmitting
and the other not powered – 100% Duty Cycle)
ACT 4489
TX DATA OUT
3600
2
3200
52.5Ω
1:1
3
8
B
A
POWER DISSIPATION
MILLIWATTS
3.0W
0.270
2800
2400
TX DATA OUT
Typical Hybrid Input Power
1
4
T1553-1
RX DATA IN
2000
52.5Ω
Zoi
1.9W
70Ω
RX DATA IN
1600
1200
800
Typical Hybrid
Dissipation
400
0
0
Transformer Model use Technitrol Part# 1553-1
or equivalent
10
20
30
40
50
60
70
80
90 100
DUTY CYCLE – PERCENT
Note: Vcc= +12V, VEE = -12V, VL= +5V, Transformer ratio 1:1,
VBUS (point A) at 7VP-P.
Configurations and Ordering Information
ACT
Model # / Ordering Part #
Case
Style
DESC
Number
Rx Standby
ACT 4489-D
DIP
TBA
Normally Low
ACT 4489-DI
DIP
TBA
Normally High
ACT 4489-DF
FP
TBA
Normally Low
ACT 4489-DFI
FP
TBA
Normally High
Specifications subject to change without notice.
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SCD4489D REV A 1/30/98 Plainview NY (516) 694-6700
Figure 6 – Lead Numbers & Functions
ACT4489
Aeroflex Circuit Technology
Pin
#
Function
Channel
1
TX DATA OUT
A
2
TX DATA OUT
A
3
GROUND 1
A
4
NC
5
RX DATA OUT
A
6
STROBE
A
7
GROUND 2
A
8
RX DATA OUT
A
9
CASE
10
TX DATA OUT
B
11
TX DATA OUT
B
12
GROUND 1
B
13
NC
14
RX DATA OUT
B
15
STROBE
B
16
GROUND 2
B
17
RX DATA OUT
B
18
NC
19
VCC
B
20
RX DATA IN
B
21
RX DATA IN
B
22
GROUND 3
B
23
VEE
B
24
+5 V (VL)
B
25
INHIBIT
B
26
TX DATA IN
B
27
TX DATA IN
B
28
VCC
A
29
RX DATA IN
A
30
RX DATA IN
A
31
GROUND 3
A
32
VEE
A
33
+5 V (VL)
A
34
INHIBIT
A
35
TX DATA IN
A
36
TX DATA IN
A
6
SCD4489D REV A 1/30/98 Plainview NY (516) 694-6700
CIRCUIT TECHNOLOGY
Model ACT4489 Dual In Line
1.90 MAX
0.085
1.70
.097
19
36
0.78
MAX
0.600
18
Pin 1 & ESD
Designator
0.21MAX
0.24
MIN
0.018 DIA.
±0.002
Model ACT4489 FLAT PACKAGE
0.78 MAX
19
18
0.015
±0.002
1.90 MAX
0.10 Typ
36
0.097
0.086 R
4 Places
0.175 MAX
Pin 1 & ESD
Designator
0.010
±0.002
0.40
0.065
MIN
REF
Notes
2 SIDES
1. Dimensions shown are in inches
2. Pins are equally spaced at 0.100±0.002 tolerance,
non-cumulative, each row
Telephone: (516) 694-6700
FAX:
(516) 694-6715
Toll Free Inquiries: (800) THE-1553
E-Mail: sales-act@aeroflex.com
Aeroflex Circuit Technology
35 South Service Road
Plainview New York 11830
www.aeroflex.com/act1.htm
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7
SCD4489D REV A 1/30/98 Plainview NY (516) 694-6700