ACT4433-D (2/05)

Standard Products
ACT4433 Dual Transceivers
for MIL-STD-1553 / MIL-STD-1760 & SAE-AS15531
www.aeroflex.com/Avionics
February 18, 2005
FEATURES
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Small size, light weight and low power dissipation dual transceiver
Smaller Case Outline then ACT4489D
Bipolar supply ±12V, Logic supply +5V
Outstanding MIL-STD-1553 / MIL-STD-1760 / SAE-AS15531 performance
Monolithic construction
Designed for commercial, industrial and aerospace applications
MIL-PRF-38534 compliant devices available
Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer
GENERAL DESCRIPTION
The Aeroflex-Plainview ACT4433 is a next generation monolithic transceiver design which provides full compliance
to MIL-STD-1553A/B and 1760 requirements in a small package with lower pin count then the ACT4489D, for
those designs with less board space.
The dual channel Model ACT4433 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.
TRANSMITTER
The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1:1 ratio
transformer 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 1553 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.
SCD4433D Rev C
TX DATA IN
TX DATA OUT
DRIVER
TX DATA IN
ACTIVE
FILTER
OUTPUT
STAGE
TX DATA OUT
REFERENCE
COMP.
RX DATA OUT
ACTIVE
FILTER
COMP.
TX INHIBIT
+5 V (VL)
+12 V (VCC)
-12 V (VEE)
GND1
GND2
GND3
RX STROBE IN
RX DATA IN
RX DATA IN
INPUT
AMPLIFIER
RX DATA OUT
CASE
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
FIGURE 2 – RECEIVER LOGIC WAVEFORMS IDEALIZED
SCD4433D Rev C
2
ABSOLUTE MAXIMUM RATINGS
Operating Case Temperature
-55°C to +125°C
Storage Case Temperature
-65°C to +150°C
Power Supply Voltages
VCC
VEE
VL
-0.3 VDC to +18 VDC
+0.3 VDC to -18 VDC
-0.3 VDC to +7.0 VDC
Logic Input Voltage
-0.3 VDC to +5.5 VDC
±40VP-P
Receiver Differential Input
Receiver Input Voltage (Common Mode)
±10V
Driver Peak Output Current
300 mA
Total Package Power Dissipation over the Full Operating
Case Temperature Range
2.5 Watts
(Note: Normal operation conditions require one transmitter
on and the other off at any given time)
Maximum junction to Case Temperature
10°C
Thermal resistance – Junction to Case
4°C/W
ELECTRICAL CHARACTERISTICS – DRIVER SECTION 2/ 3/
INPUT CHARACTERISTICS, TX DATA IN OR TX DATA IN
Parameter
Condition
Symbol
Min
Typ
Max
Unit
"0" Input Current
VIN = 0.4V
IILD
-
-0.1
-0.2
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
-
-0.1
-0.2
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
tDXOFF
-
175
225
nS
tDXON
-
90
150
nS
VNOI
-
2
10
mVp-p
Point B
ZOI
2K
-
-
Ω
Point C
ZOI
1K
-
-
Ω
Figure 5,
Point A
VO
6.5
7.5
9.0
Vp-p
Rise and fall times (10% to 90% of Vp-p output)
tR / tF
100
160
300
nS
Output Offset at point A on Figure 3, 2.5µS after
midpoint crossing of the parity bit of the last word
of a 660µS message.
VOS
-
-
±90
mVpeak
Delay from 50% point of TX DATA or TX DATA
input to zero crossing of differential signal
tDTX
-
100
200
nS
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
Figure 5,
Point B
Differential Output Noise, inhibit mode
Differential Output Impedance (inhibited) Note 1.
See Figure 5
OUTPUT CHARACTERISTICS
Differential output level
SCD4433D Rev C
3
ELECTRICAL CHARACTERISTICS – RECEIVER SECTION
Parameter
Differential Voltage Range, Figure 5 Point B
Condition
Symbol
Min
Typ
Max
Unit
TXFMR 1:1
VIDR
-
-
40
VPK
CMRR
45
-
-
dB
Common Mode Rejection Ratio (Note 3)
"1" State – Rx Data or Rx Data Output
IOH = -0.4 mA
VOH
2.5
3.7
-
V
"0" State – Rx Data or Rx Data Output
IOI = 4 mA
VOL
-
0.35
0.5
V
tDXT
-
270
400
nS
VTH
0.60
0.75
1.15
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
STROBE CHARACTERISTICS (LOGIC "0" INHIBITS OUTPUT)
"0" Input Current
VS = 0.4V
IIL
-
-0.1
-0.2
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
POWER DATA
POWER SUPPLY CURRENTS – PER CHANNEL – SEE FIGURE 4
Transmitter Standby
ICC
IEE
IL
-
0
12
18
1
16
30
25% duty cycle
ICC
IEE
IL
-
58
12
18
63
20
30
50% duty cycle
ICC
IEE
IL
-
115
12
18
125
20
30
100% duty cycle
ICC
IEE
IL
-
230
12
18
250
20
30
mA
POWER SUPPLY VOLTAGES
±12V Operating Power Supply Voltage Range
VCC
VEE
+11.40 +12.00 +12.60
-11.40 -12.00 -12.60
V
V
+5V Operating Power Supply Voltage Range)
VL
+4.75
V
+5.00
+5.25
Notes:
1. Power on or off, measured from 75KHz to 1MHz at point A and transformer self impedance of 3KΩ minimum at 1MHz.
2. Power Supplies: +12 Volts ±0.60 V & +5 Volts ±0.5V, 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.
3. When measured as shown per Figure 5 with ± 10 Volt peak, line to ground, DC to 2MHz
4. Typical power is measured with VBUS at point A = 7.5 VP-P
SCD4433D Rev C
4
LAST BIT
Magnified View
OUTPUT OFFSET
*
OUTPUT OFFSET
*
0 Volts
Transformer Coupled Stub
2.5 µS
70Ω
ACT4433
TX DATA OUT
*Offset measured at point A in Figure 5
2
FIGURE 3 – TRANSMITTER (TX) OUTPUT
OFFSET
TX DATA OUT
1:1.4 52.5Ω
1:0.707
7
3
C
A
1
5
T1553-1
52.5Ω
RX DATA IN
Zoi
VCM
RX DATA IN
Direct Coupled Stub
ACT4433
3600
TX DATA OUT
3200
3.0W
2
POWER DISSIPATION
MILLIWATTS
2800
2400
TX DATA OUT
1.9W
1600
RX DATA IN
1200
RX DATA IN
800
B
A
4
1
T1553-1
52.5Ω
Zoi
Typical Hybrid
Dissipation
400
0
0
8
Typical Hybrid Input Power
2000
0.270
52.5Ω
1:1
3
10
20
30
40
50
60
70
80
Transformer Model use Technitrol Part# 1553-1
or equivalent
90 100
DUTY CYCLE – PERCENT
Note: VCC = +12V, VEE = -12V, VL = +5V, Transformer ratio 1:1,
VBUS (point A) at 7VP-P.
FIGURE 5 – TYPICAL 1553 BUS
CONNECTION
FIGURE 4 – POWER DISSIPATION VS.
DUTY CYCLE
(Total hybrid with one channel transmitting
and the other not powered)
SCD4433D Rev C
5
70Ω
FIGURE 6 – LEAD NUMBERS & FUNCTIONS
Pin #
Function
Channel
1
TX DATA OUT/ RX DATA IN
A
2
TX DATA OUT/ RX DATA IN
A
3
GROUND
A
4
RX STROBE
A
5
RX DATA OUT
A
6
RX DATA OUT
A
7
CASE
A
8
TX DATA OUT/ RX DATA IN
B
9
TX DATA OUT/ RX DATA IN
B
10
GROUND
B
11
RX STROBE
B
12
RX DATA OUT
B
13
RX DATA OUT
B
14
NC
B
15
GROUND
B
16
-VEE
B
17
VL
B
18
TX INHIBIT
B
19
TX DATA IN
B
20
TX DATA IN
B
21
+V
B
22
GROUND
A
23
-VEE
A
24
VL
A
25
TX INHIBIT
A
26
TX DATA IN
A
27
TX DATA IN
A
28
+VCC
A
SCD4433D Rev C
6
CONFIGURATIONS AND ORDERING INFORMATION
Model No.
Receiver Data level
DESC SMD
ACT4433-D
Normally Low
Pending
ACT4433-DI
Normally High
ACT4433-DF
Normally Low
ACT4433-DFI
Normally High
Case
Configuration
Plug-In Package
Dual
Flat Package
PACKAGE CONFIGURATION OUTLINE
Flat Package
Plug-In Package
.180
MAX.
.072
1.500 MAX.
.015
28
1.480 MAX.
28
15
0.780
MAX.
15
0.780
MAX.
0.600
14
Pin 1 & ESD
Designator
Lead 1 & ESD
Designator
14
0.210
MAX.
.250
.400
MIN.
.100
.010
.018
.100
1.300
(13 Equal Spaces at .100)
1.300
(13 Equal Spaces at .100)
Notes
1. Dimensions shown are in inches
2. Pins are equally spaced at 0.100±0.002 tolerance,
non-cumulative, each row
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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.
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solution-minded, performance-driven and customer-focused
SCD4433D Rev C
7
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