ACT4455 (11/08)

Standard Products
ACT4455/4459 Single Supply Transceiver
for MIL-STD-1553/1760 & SAE-AS15531
www.aeroflex.com/Avionics
November 5, 2008
FEATURES
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Small size, light weight and low standby power single transceiver
Single +5V power supply
Monolithic construction
Outstanding MIL-STD-1553 / SAE-AS15531 performance
Designed for commercial, industrial and aerospace applications
Processed and screened to MIL-STD-883 specs
MIL-PRF-38534 compliant devices
Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer
Packaging – 28-pad Ceramic LCC, Hermetic
DSCC SMD: 5962–96741 approved
GENERAL DESCRIPTION
The Aeroflex-Plainview ACT4455/4459 series are next generation monolithic transceiver designs which provide full
compliance with MIL-STD-1553A/B, MIL-STD-1760 and SAE-AS15531 requirements in the smallest packages
with low power consumption and single power supply operation. The series performs the front-end analog function
of inputting and outputting data through a transformer to the MIL-STD-1553 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. All inputs are
internally pulled up to +5 Volts.
TRANSMITTER
The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1:2.5 ratio
transformer the data bus signal is typically 7.5 volts P-P at A-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” 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-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 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 Strobe input inhibits the DATA and DATA outputs.
SCD4455 Rev C
TX DATA IN
TX DATA IN
TX INHIBIT
+5 V
TX GND1
TX GND2
TX GND3
RX GND
RX DATA IN
RX DATA IN
STROBE
1,28
TX DATA OUT
ACTIVE
FILTER
OUTPUT
STAGE
4,5
TX DATA OUT
REFERENCE
COMP.
13
RX DATA OUT
ACTIVE
FILTER
COMP.
10
RX DATA OUT
25
26
DRIVER
24
2,3,9,15,23
6
27
16
22
19
18
INPUT
AMPLIFIER
11
BLOCK DIAGRAM (WITHOUT TRANSFORMER)
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 1 – TRANSMITTER LOGIC WAVEFORMS IDEALIZED *
LINE TO LINE
INPUT
STROBE
DATA OUT
DATA OUT
Note overlap
* See Figure 7 for Actual Waveforms
FIGURE 2 – RECEIVER LOGIC WAVEFORMS IDEALIZED *
SCD4455 Rev C 11/5/08
2
Aeroflex Plainview
ABSOLUTE MAXIMUM RATINGS
Operating case temperature
-55°C to +125°C
Storage case temperature
-65°C to +150°C
Power supply voltage
-0.3VDC to +7.0VDC
Logic input voltage
-0.3VDC to +5.5VDC
Receiver differential input
±10 V
Receiver input voltage (common mode)
±5 V
Driver peak output current
1.0 A
Total package power dissipation over the full operating
case temperature range
2.0 Watts
10°C
Maximum junction to case temperature
5°C/W
Thermal resistance – Junction to case
ELECTRICAL CHARACTERISTICS – DRIVER SECTION
INPUT CHARACTERISTICS, TX DATA IN OR TX DATA IN (Notes 2 & 3 Apply)
Parameter
Condition
Symbol
Min
Typ
Max
Unit
"0" Input Current
VIN = 0.4V
IILD
-
-0.2
-0.4
mA
"1" Input Current
VIN = 2.7V
IIHD
-
1
40
µA
"0" Input Voltage
VILD
-
-
0.7
V
"1" Input Voltage
VIHD
2.0
-
-
V
INHIBIT CHARACTERISTICS
"0" Input Current
VIN = 0.4V
IILI
-
-0.2
-0.4
mA
"1" Input Current
VIN = 2.7V
IIHI
-
1.0
40
µA
"0" Input Voltage
VILI
-
-
0.7
V
"1" Input Voltage
VIHI
2
-
-
V
Delay from TX inhibit, (0➝1) to inhibited output
tDXOFF
-
250
450
nS
Delay from TX inhibit, (1➝0) to active output
tDXON
-
150
250
nS
Differential Output Noise, inhibit mode
VNOI
-
2
10
mVp-p
Note 1
ZOI
2K
-
-
Ω
RL = 35 Ω
VO
6.5
7.5
9
Vp-p
tr
100
200
300
nS
VOS
-
-
±90
mVpeak
tDTX
-
120
250
nS
Differential Output Impedance (inhibited)
OUTPUT CHARACTERISTICS
Differential output level
Rise and fall times (10% to 90% of p-p output)
Output offset at point A-A’ on Figure 5, 2.5 µS
after midpoint crossing of the parity bit of the last
word of a 660µS message
Delay from 50% point of TX DATA or TX DATA
input to zero crossing of differential signal
SCD4455 Rev C
RL = 35 Ω
ELECTRICAL CHARACTERISTICS – RECEIVER SECTION
Parameter
Differential Voltage Range
(See Figure 5, point P-P’)
Condition
Symbol
Min
Typ
Max
Unit
TXFMR
2.5:1
VIDR
-
14
20
Vp-p
CMRR
45
-
-
dB
Common Mode Rejection Ratio (Note 3)
STROBE CHARACTERISTICS (LOGIC "0" INHIBITS OUTPUT)
"0" Input Current
VS = 0.4V
IIL
-
-0.2
-0.4
mA
"1" Input Current
VS = 2.7V
IIH
-
1
+40
µA
"0" Input Voltage
VIL
-
-
0.7
V
"1" Input Voltage
VIH
2.0
-
-
V
Strobe Delay (Turn-on or Turn-off)
tSD
-
50
200
nS
0.56
0.82
1.10
Vp-p
THRESHOLD CHARACTERISTICS (SINEWAVE INPUT )
Internal Threshold Voltage (Referred to the bus)
100KHz-1MHz
VTH
OUTPUT CHARACTERISTICS, RX DATA AND RX DATA
"1" State
IOH = -0.4mA
VOH
2.5
3.7
-
V
"0" State
IOL = -4mA
VOL
-
0.35
0.5
V
Delay, (average) from differential input zero
crossings to RX DATA and RX DATA output
50% points
tDRX
-
340
500
nS
POWER DATA
POWER SUPPLY CURRENTS – PER CHANNEL
Transmitter Standby
-
18
30
-
150
220
50% Duty Cycle
-
300
395
100% Duty Cycle
-
600
745
+4.75
+5.00
+5.50
25% Duty Cycle
(Note 4)
ICC
mA
POWER SUPPLY VOLTAGE
VCC
Operating Power Supply Voltage Range
V
NOTES:
1. Power on or off, measured from 75KHz to 1MHz at point A-A' and transformer self impedance of 3KΩ minimum.
2. Vcc = 5 Volts ±0.1 V, bypassed by 2.2 µF (Tantalum recommended) Capacitor minimum. All measurements & specifications apply over
the temperature range of -55°C to +125°C (case temperature) unless otherwise specified.
3. When measured at point A-A’ with ± 10 Volt peak, line to ground, DC to 2MHz.
4. Typical power is measured with Vbus at point A-A’ = 7.5 Vp-p.
SCD4455 Rev C 11/5/08
4
Aeroflex Plainview
LAST BIT
tf *
90%
Magnified View
*
OUTPUT OFFSET
6V P-P MIN
9V P-P MAX
0 Volts
0 volts
*
OUTPUT OFFSET
10%
2.5 µsec
tr *
*Offset measured at point A-A' in Figure 5
* Rise and fall times measured at point A-A' in Figure 5
FIGURE 3 – TRANSMITTER (TX) OUTPUT
WAVEFORM
FIGURE 4 – TRANSMITTER (TX) OUTPUT
OFFSET
2200
70Ω
70Ω
2000
TX DATA OUT
52.5Ω
N1:N2
P
B
A
Center N1:N3 for
Stub
Tap
Coupling
ACT4455
TX DATA OUT
P'
A'
B'
POWER DISSIPATION
MILLIWATTS
1800
1600
1400
1200
Maximum
1000
Typical
800
600
52.5Ω
RX DATA IN
400
RX DATA IN
200
Transformer turns ratios:
N1:N2 = 1:2.5
N1:N3 = 1:1.77
Use Technitrol 1553-45 or equivalent
FIGURE 5 – TYPICAL TRANSFORMER
DIRECT CONNECTION
SCD4455 Rev C
0
0
10
20
30
40
50
60
70
80
90 100
DUTY CYCLE – PERCENT
Note: Vcc = 5VDC, Transformer ratio 1:2.5, VBUS (pt A-A') at 7.5Vp-p
FIGURE 6 – POWER DISSIPATION VS.
DUTY CYCLE
S TA RT O F WO R D – 3 3 WO R D T R A N S M I S S IO N
TX DATA IN
CH 2
BUS OUT
Point A–A'
See Figure 5
CH 1
RX DATA OUT
CH 3
RX DATA OUT
CH 4
E N D O F WO R D – 3 3 WO R D T R A N S M I S S I O N
TX DATA IN
CH 2
BUS OUT
Point A–A'
See Figure 5
CH 1
RX DATA OUT
CH 3
RX DATA OUT
CH 4
* Oscilloscope used is a TEK TDS540 with Probe 6139A.
FIGURE 7 ACTUAL HYBRID WAVEFORMS * – 25°C TYPICAL
SCD4455 Rev C 11/5/08
6
Aeroflex Plainview
LCC LEADLESS CHIP CARRIER PACKAGE CONFIGURATION
*
ACT4455
88379
MADE IN USA
* NOTE: Castellation spacing .050 x6, Tol. Non-Accumulative
PIN NUMBERS & FUNCTIONS
Pin #
Function
Pin #
Function
1
TX DATA OUT
15
+5V
2
+5V
16
TX GND3 **
3
+5V
17
NC
4
TX DATA OUT
18
RX DATA IN
5
TX DATA OUT
19
RX DATA IN
6
TX GND1 **
20
NC
7
NC
21
NC
8
NC
22
RX GND **
9
+5V
23
+5V
10
RX DATA OUT
24
TX INHIBIT
11
STROBE
25
TX DATA IN
12
NC
26
TX DATA IN
13
RX DATA OUT
27
TX GND2 **
14
NC
28
TX DATA OUT
** NOTE: Grounds not Internally connected
SCD4455 Rev C 11/5/08
7
Aeroflex Plainview
ORDERING INFORMATION
MODEL #
DSCC SMD #
SCREENING
RECEIVER
DATA LEVEL
-
Military Temperature, -55°C to +125°C
Screened in accordance with MIL-PRF-38534, Class H.
Normally Low
In accordance with DSCC SMD 5962-96741
Normally Low
In accordance with DSCC SMD 5962-96741
Normally High
ACT4455
ACT4455-001-1
5962-9674101H3C
ACT4455-001-2
5962-9674101H3A
ACT4459-001-1
5962-9674102H3C
ACT4459-001-2
5962-9674102H3A
PLAINVIEW, NEW YORK
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Fax: 516-694-6715
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CENTRAL
Tel: 719-594-8017
Fax: 719-594-8468
www.aeroflex.com
[email protected]
Aeroflex Microelectronic Solutions reserves the right to
change at any time without notice the specifications, design,
function, or form of its products described herein. All
parameters must be validated for each customer's application
by engineering. No liability is assumed as a result of use of
this product. No patent licenses are implied.
SCD4455 Rev C 11/5/08
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