ARX4808 Dual Transceivers for MACAIR A3818, A5690, A5232, A4905 & MIL-STD-1553 Features • ARX4808 Dual Transceiver meets MIL-STD-1553A & B, Macair A3818, A5690, A5232 and A4905 specs • Operates with ±12 V to ±15 V & +5 V Power Supplies • Voltage source output for higher bus drive power • Plug-in or Flat Package • Monolithic construction using linear ASICs • Low receiver data level version, ARX4868 • Processed and Screened to MIL-STD-883 specs • DESC SMD (Standard Military Drawing ) Pending ARX4808 Transceiver TX DATA OUT TX DATA IN DRIVER OUTPUT STAGE SHAPING TX DATA IN TX DATA OUT V+ TX INHIBIT COMP. V- +5 V VEE RX DATA IN RX DATA IN RX DATA OUT INPUT AMP ACTIVE FILTER COMP. RX DATA OUT VCC STROBE Block Diagram (without Transformer), 1/2 of unit shown CIRCUIT TECHNOLOGY www.aeroflex.com/act1.htm General Description: The Aeroflex Laboratories transceiver model ARX4808 is a new generation Dual monolithic transceiver which provides full compliance with Macair and MIL-STD-1553 data bus requirements The model ARX4808 performs the front-end analog function of inputting and outputting data through a transformer to a MIL-STD-1553 or Macair data bus. The ARX4808 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 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. The ARX4808 series 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.The receiver input threshold is set Internally. Transmitter The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1:1 transformer, isolated on the data bus side with two 52.5 Ohm fault isolation resistors, and loaded by two 70 Ohm terminations plus additional eroflex Circuit Technology – Data Bus Modules For The Future © SCD4808 REV A 3/9/98 receivers, the data bus signal produced is 7.5 volts minimum 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 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 Volts P-P and reject signals less than 0.6 volts P-P when used with a 1:1 turns ratio transformer. (See Figure 5 for transformer data and typical connection.) A low level at the Strobe input inhibits the DATA and DATA outputs. If unused, a 2K pull-up to +5 Volts is recommended Figure 1 Transmitter Logic Waveforms 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 2 Receiver Logic Waveforms LINE TO LINE INPUT DATA OUT DATA OUT Note overlap NOTE: Waveforms shown are for normally low devices. For normally high receiver output level devices, the receiver outputs are swapped as shown by the dashed lines Aeroflex Circuit Technology 2 SCD4808 REV A 3/9/98 Plainview NY (516) 694-6700 Absolute Maximum Ratings, Per Channel Operating case temperature -55°C to +125°C -65°C to +150 °C Storage case temperature Power supply Voltages ±15 V P.S. to ±18V MAX +5 V P.S. to +7V MAX -0.3 V to +5.5 V Logic input Voltage ±40 V 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 2.4 Watts Power Dissipation for hottest die, (100% duty cycle) 600 mW Maximum junction to case temperature rise for the hottest device (100 % duty cycle) Junction-Case, Thermal resistance for hottest device 36°C 60°C/W Electrical Characteristics Per Channel, Transmitter Section Input Characteristics, TX DATA in or TX DATA in Parameter Condition Symbol Min Typ Max Unit "0" Input Current VIN = 0.4 V IILD -0.2 -0.4 mA "1" Input Current VIN = 2.7 V IIHD 1.0 40 µA 0.7 V "0" Input Voltage VIHD "1" Input Voltage VIHD V 2.0 Inhibit Characteristics "0" Input Current VIN=0.4V "1" Input Current VIN=2.7V IILI IIHI "0" Input Voltage VILI "1" Input Voltage VIHI -0.2 -0.4 mA 1.0 40 µA 0.7 V V 2 Delay from TX inhibit(0→1) to inhibited output Note 1 tDXOFF 300 450 nS Delay from TX inhibit, (1→0) to active output Note 1 tDXON 300 450 nS VNOI 0.8 10 mV p-p Differential output noise, inhibit mode Differential output impedance (inhibited) ZOI Note 2 Ω 2K Output Characteristics Differential output level RL=35 Ω Rise and fall times (10% to 90% of p-p output) Output offset at point A-A’on Fig 5, 2.5 µS after midpoint crossing of the parity bit of the last word of a 660 µS message tr RL=35 Ω Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential signal. (Note 1) Aeroflex Circuit Technology VO 7.5 9 V p-p 200 250 300 nS VOS tDTX 3 7 ±90 240 SCD4808 REV A 3/9/98 300 mV peak nS Plainview NY (516) 694-6700 Electrical Characteristics Per Channel, Receiver Section Parameter Differential Input Impedance Condition Symbol Min Typ f = 1MHz ZIn 20K 100K Differential Input Voltage Range VIDR Max Unit 40 Ω V p-p Input Common Mode Voltage Range Note 1 VICR 10 V p-p Common Mode Rejection Ratio Note 1 CMRR 40 dB Strobe Characteristics (Logic "O" inhibits output) "0" Input Current VS = 0.4 V VS = 2.7V "1" Input Current IIL -0.2 IIH -1.0 "0" Input Voltage VIL "1" Input Voltage VIH Strobe Delay (turn-on or turn-off) mA +40 µA 0.7 V V 2.0 tSD Note 1. -0.4 150 nS 1.15 V P-P Threshold Characteristics (Sinewave input ) Internal Threshold Voltage (referred to the bus)pins 6 and 11 grounded 100KHz1 MHz VTH External threshold control ( pins 6&11 open, resistors from pin 5 and 12 to ground) Max R = 8KΩ RTH /VTH 0.60 0.8 4000 Ohms /V p-p 3.6 V Output Characteristics, RX DATA and RX DATA "1" State IOH = -0.4 mA "0" State Delay, (average)from differential input zero crossings to RX DATA and RX DATA output 50% points VOH 2.5 IOL = 4 mA VOL 0.35 0.5 V Note 1 tDRX 300 450 nS Power Supply Currents Per Channel (Power supplies set at +15V, -15V, +5V) Duty Cycle +VCC -VEE Transmitter Standby or 1% Duty Cycle 60mA 75mA 25% duty cycle 80mA 95mA 105mA 120mA 160mA 180mA Note 1 50% duty cycle 100% duty cycle Note 1 5V 35mA Recommended Power Supply Voltage Range Aeroflex Circuit Technology +V +11.4 Volts to +15.75 Volts -V -11.4 Volts to -15.75 Volts Logic +4.5 Volts to + 5.5 Volts 4 SCD4808 REV A 3/9/98 Plainview NY (516) 694-6700 Figure 3 Transmitter (TX) Output Wave form Figure 4 Transmitter (TX) Output offset LAST BIT tf* 90% Magnified View 6.5V P-P MIN 8.5V P-P MAX 0 Volts OUTPUT OFFSET * OUTPUT OFFSET * 0 Volts 10% 2.5 µsec tr* *Offset measured at point A-A’ in Fig 5 * Rise and fall times measured at point A-A’ in Fig 5 Figure 6 Power Dissipation vs. Duty Cycle (Per Channel) Figure 5 Typical Transformer connection 70Ω 70Ω TX DATA OUT POWER DISSIPATION WATTS 4.0 52.5Ω N1:N2 B A N1:N3 for stub coupling Ctr tap B’ A’ TX DATA OUT 52.5Ω RX DATA IN 3.5 3.0 2.5 (TYPICAL) 2.0 1.5 1.0 0.5 RX DATA IN 0 0 Transformer turns ratios: N1:N2 = 1:1 N1:N3 = 1:0.71 Use Aeroflex 25T1553-1 10 20 30 40 50 60 70 80 90 100 DUTY CYCLE, PERCENT NOTES 1. Characteristics guaranteed by design, not production tested. 2. Measured from 75kHz to 1MHz at point A-A’ with transformer self impedance of 3KΩ minimum, power on or off Configurations and Ordering Information Model No. DESC No. Receiver Data level Case ARX4808 TBA Normally High Plug In ARX4808-2 TBA Normally High Flat Pack ARX4868 TBA Normally Low Plug In ARX4868-2 TBA Normally Low Flat Pack Aeroflex Circuit Technology 5 SCD4808 REV A 3/9/98 Plainview NY (516) 694-6700 CIRCUIT TECHNOLOGY Dual In Line Pin Numbers & Functions 1.90 MAX 0.085 1.70 .097 19 36 0.78 MAX 0.600 18 Pin 1 & ESD Designator 0.24 MIN 0.018 DIA. ±0.002 Flat Package 0.78 MAX 19 18 0.015 ±0.002 1.90 MAX 0.10 Typ 36 0.097 0.086 R 4 Places 0.175 MAX Pin 1 & ESD Designator 0.010 ±0.002 0.40 MIN 2 SIDES 0.065 REF Notes 1. Dimensions shown are in inches 2. Pins are equally spaced at 0.100±0.002 tolerance, non-cumulative, each row Specifications subject to change without notice. Aeroflex Circuit Technology 35 South Service Road Plainview New York 11803 Aeroflex Circuit Technology Pin # Function Channel 1 TX DATA OUT A 2 TX DATA OUT A 3 GROUND A 4 NC 5 RX DATA OUT A 6 STROBE A 7 GROUND A A 8 RX DATA OUT 9 CASE 10 TX DATA OUT B 11 TX DATA OUT B 12 GROUND B 13 NC 14 RX DATA OUT B 15 STROBE B 16 GROUND B 17 RX DATA OUT B 18 NC 19 VCC B 20 RX DATA IN B 21 RX DATA IN B 22 GROUND 3 B 23 VEE B 24 +5V B 25 INHIBIT B 26 TX DATA IN B 27 TX DATA IN B 28 VCC A 29 RX DATA IN A 30 RX DATA IN A 31 GROUND A 32 VEE A 33 +5 V A 34 INHIBIT A 35 TX DATA IN A 36 TX DATA IN A Telephone: (516) 694-6700 FAX: (516) 694-6715 Toll Free Inquiries: 1-(800) THE-1553 6 SCD4808 REV A 3/9/98 Plainview NY (516) 694-6700