Standard Products
ACT4404N Single Transceiver Series
www.aeroflex.com/Avionics
December 18, 2007
for MACAIR (A3818, A4905, A5232, A5690), MIL-STD-1553
& SAE-AS15531
FEATURES
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ACT4404N & ACT4440N transceivers meets MIL-STD-1553A & B, Macair A3818, A4905, A5232 and
A5690 specs
ACT4407N & ACT4467N transceivers meets MIL-STD-1553A & B specs only
Bipolar supply ±15V to ±12V, logic supply +5V
Monolithic construction
ACT4404N is a direct replacement for the CT3232M and the ACT4407N is direct replacement for the CT3231
Voltage source output for higher bus drive power
Variable receiver threshold capability
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 ACT4404N series are a new generation monolithic transceiver which provide full compliance with
Macair and MIL-STD-1553 data bus requirements.
The model ACT4404N series performs the front-end analog function of inputting and outputting data through a transformer to a
MIL-STD-1553 or Macair data bus. The ACT4404N and ACT4440N can be considered a "Universal" Transceiver in that it is
compatible with MIL-STD-1553A/B, Macair (A-3818, A-4905, A-5232 and A-5690).
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. The ACT4404N and ACT4440N active filter design has
additional high frequency roll-off to provide the required Macair low harmonic distortion waveform without increasing the pulse
delay characteristics significantly.
Efficient transmitter electrical and thermal design provides low internal power dissipation and heat rise at high and well as low
duty cycles. An optional receiver input threshold adjustment can be accomplished by the use of the ''External Threshold"
terminals.
TRANSMITTER
The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1:1 transformer the data
bus signal produced is 7.0 Volts typical P-P at point A-A’ (See Figure 3 or 4). 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 Waveforms - Figure 1).
The transmitter utilizes an active filter to suppress harmonics above 1 MHz to meet Macair specifications A-3818, A-4905,
A-5232 and A-5690. The transmitter may be safely operated for an indefinite period at 100% duty cycle into a data bus short
circuit.
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 Waveforms - Figure 2).
The internal threshold is nominally set to detect data bus signals exceeding 1.05 Vp-p and reject signals less than 0.6 Vp-p when
used with a 1:1 turns ratio transformer (See Figure 3 or 4 for transformer data and typical connection). This threshold setting can
be held by grounding the appropriate pins or modified with the use of external resistors.
A low level at the ''STROBE'' input inhibits the DATA and DATA outputs.
SCD4404N Rev D
TX DATA IN
TX DATA IN
TX INHIBIT
GND
CASE GND
EXT. THRESHOLD
DATA
DATA
SET INTERNAL
THRESHOLD DATA
EXT. THRESHOLD
DATA
+5 V
-12V or -15V
RX DATA IN
RX DATA IN
+15V or +12V
STROBE
DRIVER
TRANSMIT
ACTIVE
FILTER
V+
TX DATA OUT
OUTPUT
STAGE
TX DATA OUT
COMP.
RX DATA OUT
V-
RECEIVE
ACTIVE
FILTER
INPUT
AMP
COMP.
RX DATA OUT
BLOCK DIAGRAM (WITHOUT TRANSFORMER
DATA IN
DATA IN
INHIBIT
LINE TO LINE
OUTPUT
Notes: 1. Line to line waveforms illustrate Macair signals, MIL-STD-1553 signals are trapezoidal.
2. DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them.
3. DATA and DATA must be in the same state during off time (both high or low).
FIGURE 1 – TRANSMITTER LOGIC WAVEFORMS IDEALIZED
LINE TO LINE
INPUT
DATA OUT
DATA OUT
Note overlap
Notes: 1. Normally high output in standby.
FIGURE 2 – RECEIVER LOGIC WAVEFORMS IDEALIZED
(Shown for normally high only)
2
SCD4404N Rev D 12/19/07
Aeroflex Plainview
ABSOLUTE MAXIMUM RATINGS
Operating Case Temperature
Storage Case Temperature
Power Supply Voltages
Logic Input Voltage
Receiver Differential Input
Receiver Input Voltage (Common Mode)
Driver Peak Output Current
Total Package Power Dissipation over the Full Operating Case
Temperature Range
*
Maximum Junction to Case Temperature (100% duty cycle)
Junction-Case, Thermal Resistance
*
See Aeroflex Application Note # 112 for reference.
-55°C to +125°C
-65°C to +150°C
±12V
DC
to ±18V
DC
-0.3 V to +5.5 V
±40 V
±10V
150 mA
3.25 Watts
16.25°C
5°C/W
+5V
DC
to +7V
DC
ELECTRICAL CHARACTERISTICS – DRIVER SECTION
1/ 2/
INPUT CHARACTERISTICS, TX DATA IN OR TX DATA IN
Parameter
"0" Input Current
"1" Input Current
"0" Input Voltage
"1" Input Voltage
Condition
V
IN
= 0.4V
V
IN
= 2.7V
-
-
Symbol
I
ILD
I
IHD
V
ILD
V
IHD
Min
-
-
-
2.0
Typ
-0.2
1
-
-
Max
-0.4
40
0.7
-
Unit
mA
µA
V
V
INHIBIT CHARACTERISTICS
"0" Input Current
"1" Input Current
"0" Input Voltage
"1" Input Voltage
Delay from TX inhibit, (0➝1) to inhibited output
Delay from TX inhibit, (1➝0) to active output
Differential Output Noise, inhibit mode
Differential Output Impedance (inhibited)
*
*
See Aeroflex Application Note # 113 for reference.
V
IN
= 0.4V
V
IN
= 2.7V
-
-
Note 1
Note 1
-
Note 2
I
ILI
I
IHI
V
ILI
V
IHI
t
DXOFF
t
DXON
V
NOI
Z
OI
-
-
-
2
-
-
-
10K
-0.1
1.0
-
-
350
300
0.8
-
-0.2
40
0.7
-
700
500
10
-
mA
µA
V
V
nS
nS
mVp-p
Ω
OUTPUT CHARACTERISTICS
Differential output Level, Figure 3 Point B-B'
Output offset at point A-A on Figures 3 or 4, 2.5µS after
midpoint crossing of the last bit
Output rise / fall times (10% to 90% of p-p output)
Delay from 50% point of TX DATA or TX DATA input
to zero crossing of differential output (Note 1)
SCD4404N Rev D 12/19/07
Z
O
= 70Ω
V
O
V
OS
t
R
& t
F
t
DTX
18
-
200
-
21
-
250
220
24
±90
300
350
Vp-p
mVpeak
nS
nS
Aeroflex Plainview
3
ELECTRICAL CHARACTERISTICS – RECEIVER SECTION
1/ 2
/
Parameter
Differential Input Impedance
Differential Input Voltage Range
Input Common Mode Voltage Range
Common Mode Rejection Ratio
Condition
f = 1MHz
-
-
-
Symbol
Z
IN
V
IDR
V
ICR
CMRR
Min
10K
-
10
40
Typ
-
-
-
-
Max
-
40
-
-
Unit
Ω
Vp-p
Vp-p
dB
STROBE CHARACTERISTICS (LOGIC "0" INHIBITS OUTPUT)
"0" Input Current
"1" Input Current
"0" Input Voltage
"1" Input Voltage
Strobe Delay (Turn-on or Turn-off)
V
S
= 0.4V
V
S
= 2.7V
-
-
-
I
IL
I
IH
V
IL
V
IH
-
-
-
2.0
-
-0.2
1
-
-
40
-0.4
+40
0.7
-
150
mA
µA
V
V
nS
t
SD
THRESHOLD CHARACTERISTICS (SINEWAVE INPUT)
Internal Threshold Voltage Figure 3
Point B - B'
1MHz
V
TH
0.60
0.80
1.10
Vp-p
OUTPUT CHARACTERISTICS, RX DATA AND RX DATA
"1" State
"0" State
Receiver Output Skew
Delay (average), from differential input zero
crossings to RX DATA and RX DATA output
50% points
I
OH
= -0.4 mA
I
OL
= 4 mA
Note 6
Note 7
V
OH
V
OL
t
RXSK
t
DRX
2.5
-
-
-
3.6
0.35
-
300
-
0.5
10
450
V
V
nS
nS
POWER SUPPLY CURRENT
1/ 2/
Duty Cycle
Transmitter Standby
Condition
Point B-B', Z
O
= 70
Ω,
V
O
= 29 V
P
-
P
Bit Pattern = FFFF
HEX
Figure 4
Symbol
I
CC
I
EE
I
L
I
CC
I
EE
I
L
I
CC
I
EE
I
L
I
CC
I
EE
I
L
4
Typ
5
25
18
20
40
18
40
60
18
85
105
18
Max
10
35
30
30
60
30
60
80
30
120
140
30
Unit
mA
25%
50%
100%
SCD4404N Rev D 12/19/07
Aeroflex Plainview
TYPICAL HYBRID POWER DISSIPATION
*
Power Supply Conditions
PSC1
V
CC
= +15V
V
EE
= -15V
V
L
= +5V
PSC2
V
CC
= +15V
V
EE
= -12V
V
L
= +5V
PSC3
V
CC
= +12V
V
EE
= -12V
V
L
= +5V
Condition
Point B-B', Z
O
= 70
Ω,
V
O
= 29 V
P
-
P
Bit Pattern = FFFF
HEX
Figure 4
Standby
100% Duty
Cycle
Unit
Watts
0.540
2.167
0.465
1.852
0.450
1.600
*
See Aeroflex Application note# 112 for reference.
Recommended Power Supply Voltage Range
+V
-V
Logic
+11.4 Volts to +15.75 Volts
-11.4 Volts to -15.75 Volts
+4.5 Volts to +5.5 Volts
Notes:
1. V
CC
= +15V
DC
±0.75V, V
EE
= -15V
DC
±0.75V, V
IL
= +5V
DC
±0.5V, T
C
= -55°C to +125°C, unless otherwise specified.
2. All typical values are measured at +25°C.
3. Characteristics guaranteed by design, not production tested.
4. Power ON/OFF, measured from 75KHz to 1MHz at Point A-A' Figure 4, in accordance with MIL-STD-1553B paragraph 4.5.2.2.2.3.
5. At point A-A' on Figure 3 or 4, 2.5µS after midpoint crossing of the parity bit of the last word of a 660 µS message.
6. Receiver skew is defined as the time from the rising edge of RX DATA OUT to the rising edge of RX DATA OUT minus 500 nS, with a
sine wave input of 3 V
P
-
P
at 1MHz driven into Point B-B' of Figure 4 or 2.1 V
P
-
P
at 1MHz driven into Point B-B' of Figure 3. The
specification maximum is guaranteed for T
A
= 25°C only. Standard TTL loads applied to RX DATA Outputs.
7. This test is performed while the Transceiver is reading its own transmission. This condition is called "Wraparound". Standard TTL loads
applied to RX DATA Outputs.
SCD4404N Rev D 12/19/07
Aeroflex Plainview
5
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