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Standard Products
ACT4404N Single Transceiver
for MACAIR (A3818, A4905, A5232, A5690), MIL-STD-1553 & SAE-AS15531
www.aeroflex.com/Avionics March 4, 2005
FEATURES

ACT4404N transceiver meets MIL-STD-1553A & B, Macair A3818, A4905, A5232 and A5690 specs Bipolar supply 15V to 12V, logic supply +5V Monolithic construction Direct replacement for CT3232M 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 transceiver model ACT4404N is a new generation monolithic transceiver which provide full compliance with Macair and MIL-STD-1553 data bus requirements. The model ACT4404N 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 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 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. The transceiver utilizes an active filter to suppress harmonics above 1MHz. The Transmitter may be safely operated at 100% duty cycle for an indefinite period into a short circuited 1553 bus.
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. If unused, a 2K Ohm pull-up to +5VDC is recommended.
SCD4404N Rev C
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
TX DATA OUT DRIVER SHAPING OUTPUT STAGE TX DATA OUT
V+
COMP.
RX DATA OUT
V-
INPUT AMP
ACTIVE FILTER
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
SCD4404N Rev C
2
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. -55C to +125C -65C to +150C 15VDC to 18VDC -0.3 V to +5.5 V 40 V 10V 150 mA 3.25 Watts 16.25C 5C/W +5VDC to +7VDC
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 VIN = 0.4V VIN = 2.7V Symbol IILD IIHD VILD VIHD Min 2.0 Typ -0.2 1 Max -0.4 40 0.7 Unit mA A V V
INHIBIT CHARACTERISTICS
"0" Input Current "1" Input Current "0" Input Voltage "1" Input Voltage Delay from TX inhibit, (01) to inhibited output Delay from TX inhibit, (10) to active output Differential Output Noise, inhibit mode Differential Output Impedance (inhibited) * * See Aeroflex Application Note # 113 for reference. VIN = 0.4V VIN = 2.7V Note 1 Note 1 Note 2 IILI IIHI VILI VIHI tDXOFF tDXON VNOI ZOI 2 10K -0.1 1.0 350 300 0.8 -0.2 40 0.7 700 500 10 mA A V V nS nS mVp-p
OUTPUT CHARACTERISTICS
Differential output Level, Figure 3 Point B-B' Output offset at point A-A on Figures 3 or 4, 2.5S 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 C
ZO = 70
VO VOS t R & tF tDTX
18 200 -
21 250 220
24 90 300 350
Vp-p mVpeak nS nS
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 ZIN VIDR VICR CMRR Min 10K 10 40 Typ Max 40 Unit 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) VS = 0.4V VS = 2.7V IIL IIH VIL VIH 2.0 -0.2 1 40 -0.4 +40 0.7 150 mA A V V nS
tSD
THRESHOLD CHARACTERISTICS (SINEWAVE INPUT)
Internal Threshold Voltage Figure 3 Point B - B' 1MHz VTH 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 IOH = -0.4 mA IOL = 4 mA Note 6 Note 7 VOH VOL tRXSK tDRX 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', ZO = 70 , VO = 29 VP-P Bit Pattern = FFFFHEX Figure 4 Symbol ICC IEE IL ICC IEE IL ICC IEE IL ICC IEE IL
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 C
TYPICAL HYBRID POWER DISSIPATION *
Power Supply Conditions PSC1 VCC = +15V VEE = -15V VL = +5V PSC2 VCC = +15V VEE = -12V VL = +5V PSC3 VCC = +12V VEE = -12V VL = +5V Condition Point B-B', ZO = 70 , VO = 29 VP-P Bit Pattern = FFFFHEX 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. VCC = +15VDC 0.75V, VEE = -151.VCC = +15VDC 0.75V, VIL = +5VDC 0.5V, TC = -55C to +125C, unless otherwise specified. 2. All typical values are measured at +25C. 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, 2.5S after midpoint crossing of the parity bit of the last word of a 660 S 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 VP-P at 1MHz driven into Point B-B' of Figure 4 or 2.1 VP-P at 1MHz driven into Point B-B' of Figure 3. The specification maximum is guaranteed for TA = 25C 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 C
5
Terminal
TRANSCEIVER UNDER TEST TX DATA OUT RX DATA IN RX DATA OUT RX DATA OUT Isolation Transformer 1:N Coupling Transformer 1 : 1.414 R Zo
B
Isolation Resistors R = 0.75 ZO
A
B'
TX DATA OUT RX DATA IN
R
Data Bus Wire Pair
A'
Zo INT INT RX RX EXT EXT RX RX NC NC Transformer turns ratio: N = 0.707 Recommend Technitrol 1553-1 NOTE: Internal RX Threshold Wiring Shown
Terminal Input Impedance B - B' MIL-STD-1553B para 4.5.2.1.2.3 1K minimum. 75KHz - 1MHz
FIGURE 3 - DATABUS INTERFACE USING TRANSFORMER COUPLING (FIGURE 9, MIL-STD-1553B)
Terminal
TRANSCEIVER UNDER TEST TX DATA OUT RX DATA IN RX DATA OUT RX DATA OUT Isolation Transformer 1:N 55 Zo
B
A
B'
TX DATA OUT RX DATA IN
55
Data Bus Wire Pair
A'
Zo INT RX NC INT RX NC EXT EXT RX RX R R NOTE: External RX Threshold Wiring Shown - R < 10K Ohms. Transformer turns ratio: N=1 Recommend Technitrol 1553-1
Terminal Input Impedance B - B' MIL-STD-1553B para 4.5.2.2.2.3 2K minimum. 75KHz - 1MHz
FIGURE 4 - DATABUS INTERFACE USING DIRECT COUPLING (FIGURE 10, MIL-STD-1553B)
SCD4404N Rev C
6
tf * 90%
LAST BIT
Magnified View
OUTPUT OFFSET*
6.0VP-P MIN 8.5VP-P MAX
0 Volts
0 volts
OUTPUT OFFSET*
10%
2.5 sec
tr* * Rise and fall times measured at point A-A' in Figure 3 * Offset measured at point A-A' in Figure 3
FIGURE 5 - TRANSMITTER (TX) OUTPUT WAVEFORM
FIGURE 6 - TRANSMITTER (TX) OUTPUT OFFSET
4.0 3.6 3.2 POWER DISSIPATION WATTS 2.8 2.4 2.0 1.6 1.2 0.8 0.4 0 0 10 20 30 40 50 60 70 80 90 100
PSC 3 PSC 1
PSC 2
DUTY CYCLE, PERCENT
FIGURE 7 - TYPICAL POWER DISSIPATION vs. DUTY CYCLE
SCD4404N Rev C
7
CONFIGURATIONS AND ORDERING INFORMATION
Model No. ACT4404N ACT4404N-2 Special Note Receiver Data level Normally High Normally High Use the ACT4404N To replace the ARX4404, ARX3404 * & CT3232M Configuration Plug In Flat Pack
* When replacing the ARX3404 Pins 6 & 11 must be grounded. Pins were no connect in the ARX3400 Series.
PACKAGE CONFIGURATION OUTLINE
PLUG-IN PACKAGE
1.27 MAX 1.10 24 1.27 MAX 13
Pin Function
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 TX DATA OUT TX DATA OUT TX GND (+5) +15V (TX) EXT. DATA THRES INT. DATA THRES RX DATA OUT STROBE RX GND (+5V) RXDATA OUT INT. DATA THRES EXT. DATA THRES +15V (RX) NC RX DATA IN RX DATA IN GND CASE GND -15V (RX) +5V TX INHIBIT TX DATA IN TX DATA IN -15V(TX)
FLAT PACKAGE
1.27 MAX 0.017 0.002 Pin 1 & ESD Designator 1.27 MAX 0.10 Typ 0.400 MIN
1.10
1
12
2 sides
0.175 0.24 MIN 0.018 DIA. 0.002 MAX 0.100
0.009 0.002 0.167 for Low Profile Flat Pack 0.200 for Std Flat Pack 0.080 0.015
Notes 1. Dimensions shown are in inches. 2. Pins are equally spaced at 0.1000.002 tolerance, non-cumulative, each row.
PLAINVIEW, NEW YORK Toll Free: 800-THE-1553 Fax: 516-694-6715 SE AND MID-ATLANTIC Tel: 321-951-4164 Fax: 321-951-4254
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www.aeroflex.com
info-ams@aeroflex.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.
SCD4404N Rev C
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