ACT4454

Standard Products
ACT4454/4460 Single Supply Dual Transceivers
for MIL-STD-1553A/B & MacAir A3818, A4905, A5232, A5690
& SAE-AS15531
www.aeroflex.com/Avionics
November 10, 2004
FEATURES
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Small size, light weight and low standby power dual transceivers
Single +5V power supply
Monolithic construction
Input and output TTL compatible design
Designed for commercial, industrial and aerospace applications
Processed and screened to MIL-STD-883 specs
MIL-PRF-38534 compliant devices available
Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer
DESC SMD# 5962–92061
ACT 4454
Case Style
Actual Size
GENERAL DESCRIPTION
The Aeroflex-Plainview ACT4454/4460 series are next generation monolithic transceiver designs which provides full
compliance with MIL-STD-1553A /B, MacAir A3818, A5690, A5232, A4905 and meets 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.
The ACT4454/4460 series can be considered a "Universal" Transceiver in that it is compatible with MIL-STD-1553A & B,
Macair A-3818, A-4905, A-5232, A-5690, A-5690, and meets SAE-AS15531.
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.
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 7.0 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 Figure 1 Transmitter Logic Waveform). 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 Figure 2
Receiver Logic Waveform) .
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 connections).
A low level at the Strobe input inhibits the DATA and DATA outputs. If unused, a 2K pull-up to +5 Volts is recommended.
SCD4454 Rev B
TX DATA OUT
TX DATA IN
DRIVER
TX DATA IN
ACTIVE
FILTER
OUTPUT
STAGE
TX DATA OUT
REFERENCE
COMP.
RX DATA OUT
ACTIVE
FILTER
COMP.
TX INHIBIT
+5 V
+5V RTN
RX DATA IN
INPUT
AMPLIFIER
RX DATA IN
RX DATA OUT
STROBE
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 *
SCD4454 Rev B
2
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
±10 V
Receiver differential input
±5V
Receiver input voltage (common mode)
800 mA
Driver peak output current
2.0 Watts
Total package power dissipation over the full operating
case temperature range
(Note: Normal operation conditions require one transmitter on and the
other off at any given time)
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
450
nS
Differential Output Noise, inhibit mode
VNOI
-
2
10
mVp-p
Note 1
ZOI
2K
-
-
Ω
RL = 35 Ω
VO
6.3
7.0
7.7
Vp-p
tr
200
240
300
nS
VOS
-
-
±90
mVpeak
tDTX
-
290
400
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 600µS message
RL = 35 Ω
Delay from 50% point of TX DATA or TX DATA
input to zero crossing of differential signal
SCD4454 Rev B
3
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
100
nS
0.60
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
-
13
30
25% Duty Cycle
-
170
195
50% Duty Cycle
-
320
345
100% Duty Cycle
-
700
750
+4.75
+5.00
+5.50
Transmitter Standby
Note 4
ICC
mA
POWER SUPPLY VOLTAGE
VCC
Operating Power Supply Voltage Range
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’ = 7.0 Vp-p.
SCD4454 Rev B
4
V
LAST BIT
tf*
90%
Magnified View
6V P-P MIN
9V P-P MAX
OUTPUT OFFSET
*
OUTPUT OFFSET
*
0 volts
0 Volts
10%
2.5 µsec
tr*
* Rise and fall times measured at point A-A' in Figure 5
*Offset measured at point A-A' in Figure 5
FIGURE 3 – TRANSMITTER (TX) OUTPUT
WAVEFORM
FIGURE 4 – TRANSMITTER (TX) OUTPUT
OFFSET
2200
70Ω
70Ω
2000
52.5Ω
N1:N2
TX DATA OUT
P
B
A
Center
Tap
TX DATA OUT
P'
POWER DISSIPATION
MILLIWATTS
1800
N1:N3 for
Stub
Coupling
A'
B'
1600
1400
Maximum
1200
1000
Typical
800
600
52.5Ω
RX DATA IN
400
RX DATA IN
200
0
0
Transformer turns ratios:
N1:N2 = 1:2.5
N1:N3 = 1:1.77
Use Technitrol 1553-45 or equivalent
10
20
30
40
50
60
70
80
90 100
DUTY CYCLE – PERCENT
Note: VCC=5 Volts,Transformer ratio 1:2.5, VBUS (pt A-A') at 7.0 Volts P-P
FIGURE 6 – POWER DISSIPATION VS.
DUTY CYCLE
(Total, hybrid with one channel transmitting
and the other not powered)
FIGURE 5 – TYPICAL TRANSFORMER
DIRECT CONNECTION
SCD4454 Rev B
5
S TA RT O F W O R D – 3 3 W OR D TR A N S M I SS 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
E N D OF W O R D – 3 3 W O R D TR A N S M I S SI 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
SCD4454 Rev B
6
PIN NUMBERS & FUNCTIONS
Pin #
Function
Channel
1
TX DATA OUT/RX DATA IN
A
2
TX DATA OUT/RX DATA IN
A
3
GROUND 1
A
4
RX DATA OUT
A
5
STROBE
A
6
RX DATA OUT
A
7
TX DATA OUT/RX DATA IN
B
8
TX DATA OUT/RX DATA IN
B
9
GROUND 1
B
10
RX DATA OUT
B
11
STROBE
B
12
RX DATA OUT
B
13
GROUND 2
B
14
+5V
B
15
GROUND 3
B
16
INHIBIT
B
17
TX DATA IN
B
18
TX DATA IN
B
19
GROUND 2
A
20
+5V
A
21
GROUND 3
A
22
INHIBIT
A
23
TX DATA IN
A
24
TX DATA IN
A
SCD4454 Rev B
7
CONFIGURATIONS AND ORDERING INFORMATION
Model No.
DESC No.
Receiver Data level
ACT 4454-201-1
5962-9206110HZC
Normally High
ACT 4454-201-2
5962-9206110HZA
ACT 4460-201-1
5962-9206109HZC
ACT 4460-201-2
5962-9206109HZA
Case
Flat Package
Configuration
Dual
Normally Low
FLAT PACKAGE CONFIGURATION
PIN 1
0.596
MAX
0.410
MIN
0.808
MAX
0.550
11 Equal Spaces
at 0.050
Noncumulative
0.018
MAX
0.010
± 0.003
0.056
MAX
0.095
MAX
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CENTRAL
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Fax: 719-594-8468
www. a e ro fl e x. com
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± 0.005
i nfo- a ms@ a e rofl e x. com
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.
Our passion for performance is defined by three
attributes represented by these three icons:
solution-minded, performance-driven and customer-focused
SCD4454 Rev B
8
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