ACT4402 (11/05)

Standard Products
ACT4402 Single Transceiver
for MIL-STD-1553A/B, MIL-STD-1760 & SAE-AS15531
www.aeroflex.com/Avionics
May 11, 2005
FEATURES
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Small size, light weight and low power dissipation single transceiver
+5VDC / ±15VDC power supply operation
Outstanding MIL-STD-1553 / SAE-AS15531 performance
Monolithic construction
Input and output TTL compatible design
Replacement for Aeroflex's 3402 & 2402
Designed for commercial, industrial and aerospace applications
MIL-PRF-38534 compliant devices available
Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer
Packaging – Hermetic Ceramic
- Available in a 24pin Ceramic Housing which is 21% smaller than the metal plug-in
- Non-conductive mounting surface
- No package glass beads
- Small size & light weight
DESCRIPTION
The Aeroflex-Plainview ACT4402 is the next generation monolithic transceiver design which provides full
compliance with MIL-STD-1553A/B, MIL-STD-1760 and meets SAE-AS15531 requirements in a small ceramic
package with low power consumption. 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.
TRANSMITTER
The transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1.4:1 ratio
transformer the data bus signal is typically 7.5 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” 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) 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 RX Strobe input inhibits the DATA and DATA outputs. If unused RX Strobe is internally pulled high.
SCD402 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)
+15 V (+Vcc)
-15 V (-VEE)
GND
RX DATA IN
RX DATA IN
INPUT
AMPLIFIER
RX DATA OUT
RX 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
FIGURE 2 – RECEIVER LOGIC WAVEFORMS IDEALIZED
SCD402 Rev C
2
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 VDC to +18 VDC
+0.3 VDC to -18 VDC
-0.3 VDC to +7.0 VDC
Logic input voltage
-0.3VDC to +5.5VDC
Receiver differential input
±40 Vp-p
Receiver input voltage (common mode)
±10V
Driver peak output current
200 mA
Total package power dissipation over the full operating
case temperature range
2.5 Watts
Maximum junction to case temperature
10°C
Thermal resistance – Junction to case
4°C/W
ELECTRICAL CHARACTERISTICS – DRIVER SECTION (Note 2)
INPUT CHARACTERISTICS, TX DATA IN OR TX DATA IN
Parameter
Condition
Symbol
Min
Typ
Max
Unit
"0" Input Current
VIN = 0.4V
IILD
-
-0.2
-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
Delay from TX inhibit, (0➝1) to inhibited output
tDXOFF
-
175
200
nS
Delay from TX inhibit, (1➝0) to active output
tDXON
-
90
200
nS
Differential Output Noise, inhibit mode
VNOI
-
2
10
mVp-p
Point B
ZOI
2K
-
-
Ω
Point C
ZOI
1K
-
-
Ω
Figure 5
Point A
VO
6
7.5
9
Vp-p
tr
100
160
200
nS
Output offset. See Figure 3. 2.5 µS 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
Differential Output Impedance (inhibited) Note 1
See Figure 5
OUTPUT CHARACTERISTICS
Differential output level
Rise and fall times (10% to 90% of p-p output)
SCD402 Rev C
3
ELECTRICAL CHARACTERISTICS – RECEIVER SECTION (Note 2)
Parameter
Condition
Symbol
Min
Typ
Max
Unit
TXFMR
1.4:1
VIDR
-
-
40
Vp-p
Note 3
CMRR
45
-
-
dB
"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
tDRX
-
270
400
nS
VTH
0.60
0.75
1.20
Vp-p
Differential Voltage Range
(See Figure 5, Point B)
Common Mode Rejection Ratio
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
-
-0.2
-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
POWER DATA (Note 2)
POWER SUPPLY CURRENTS – PER CHANNEL
Transmitter Standby
Note 4
ICC
IEE
IL
-
0
12
18
1
16
30
25% Duty Cycle
ICC
IEE
IL
-
45
12
18
50
20
30
50% Duty Cycle
ICC
IEE
IL
-
90
12
18
100
20
30
100% Duty Cycle
ICC
IEE
IL
-
180
12
18
200
20
30
mA
POWER SUPPLY VOLTAGE
±15V Operating Power Supply Voltage Range
VCC
VEE
+14.25
-14.25
+15.00 +15.75
-15.00 -15.75
V
V
+5V Operating Power Supply Voltage Range
VL
+4.50
+5.00
V
+5.50
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: ±15VDC ±0.75V & +5VDC ±0.5V, bypassed by 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 in Figure 5 with ±10VPK, line to ground, DC to 2MHz.
4. Typical power is measured with VBUS at Point A = 7.5 Vp-p.
SCD402 Rev C
4
Transformer Coupled Stub
LAST BIT
70Ω
ACT4402
Magnified View
TX DATA OUT
*
OUTPUT OFFSET
0 Volts
1:1.4 52.5Ω
2:1
3
7
2
*
OUTPUT OFFSET
TX DATA OUT
2.5 µsec
C
A
1
5
T1553-2
52.5Ω
RX DATA IN
Zoi
VCM
RX DATA IN
*Offset measured at Point A in Figure 5
FIGURE 3 – TRANSMITTER (TX) OUTPUT
OFFSET
Direct Coupled Stub
ACT4402
TX DATA OUT
2
TX DATA OUT
RX DATA IN
3600
55Ω
1.4:1
3
8
B
A
4
1
T1553-2
55Ω
Zoi
RX DATA IN
3200
2.97W
POWER DISSIPATION
MILLIWATTS
2800
2400
Typical Hybrid Input Power
Transformer Model use Technitrol Part# 1553-2
or equivalent
2000
1.87W
FIGURE 5 – TYPICAL 1553 BUS
CONNECTIONS
1600
1200
800
0.270
Typical Hybrid
Dissipation
400
0
0
10
20
30
40
50
60
70
80
90 100
DUTY CYCLE – PERCENT
Note: Vcc= +15V, VEE = -15V, VL= +5V, Transformer ratio 1.4:1,
VBUS (Point A) at 7.5VP-P.
FIGURE 4 – POWER DISSIPATION VS.
DUTY CYCLE
SCD402 Rev C
5
70Ω
PIN NUMBERS & FUNCTIONS
Pin #
SCD402 Rev C
Function
1
TX DATA OUT
2
TX DATA OUT
3
GROUND
4
NC
5
NC
6
NC
7
RX DATA OUT
8
STROBE
9
GROUND
10
RX DATA OUT
11
NC
12
NC
13
VCC
14
NC
15
RX DATA IN
16
RX DATA IN
17
NC
18
GROUND
19
VEE
20
+5 V
21
TX INHIBIT
22
TX DATA IN
23
TX DATA IN
24
NC
6
CONFIGURATIONS AND ORDERING INFORMATION
Rx Standby
Case Style
ACT4402
Normally Low
Ceramic Dip
ACT4402-I
Normally High
Model No.
CERAMIC PACKAGE OUTLINE
24
13
12
Pin# 1 & ESD
Designator
1.270
MAX
.200
MAX
.620
MAX
.150
MIN
.030
.010
.019
.015
.050
TYP
.610
.590
.012
.008
All dimensions in inches
PLAINVIEW, NEW YORK
Toll Free: 800-THE-1553
Fax: 516-694-6715
INTERNATIONAL
Tel: 805-778-9229
Fax: 805-778-1980
NORTHEAST
Tel: 603-888-3975
Fax: 603-888-4585
SE AND MID-ATLANTIC
Tel: 321-951-4164
Fax: 321-951-4254
WEST COAST
Tel: 949-362-2260
Fax: 949-362-2266
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.
SCD402 Rev C
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7
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