ACT4077 Driver for MACAIR A3818, A5690, A5232, A4905 & MIL-STD-1553 CIRCUIT TECHNOLOGY www.aeroflex.com Features • ACT4077 Driver meets MIL-STD-1553A & B, Macair A3818, A4905, A5232 and A5690 specs • Bipolar Supply ±15V to ±12V, Logic Supply +5V • Direct replacement for CT2077 and CT3077 • Voltage source output for higher bus drive power • Plug-in, flat package or low profile flat package • Monolithic construction using linear ASICs • Processed and screened to MIL-STD-883 specs • MIL-PRF-38534 Compliant Devices Available X LE F 7 O 7 9 R 0 7 E 4 3 A CT 88 A AS U X LE P F F O 77 9 R 0 7 E 4 3 A CT 88 A AS U ACT4077 Driver TX DATA IN TX DATA IN DRIVER SHAPING OUTPUT STAGE TX DATA OUT TX DATA OUT TX INHIBIT Block Diagram (without Transformer) EROFLEX CIRCUIT TECHNOLOGY - Data Bus Modules for the Future ©SCD4077 REV A 3/25/03 General Description The Aeroflex Laboratories driver ACT4077 are new generation monolithic Drivers which provide full compliance with Macair and MIL-STD-1553 data bus requirements The ACT4077 performs the front-end analog function of inputting and outputting data through a transformer to a MIL-STD-1553 or Macair data bus. The ACT4077 can be considered a "Universal" Driver in that it is compatible with MIL-STD-1553A, B, Macair A-3818, A-4905, A-5232 and A-5690. Design of the Driver 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 ACT4077 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 Driver electrical and thermal design provides low internal power dissipation and heat rise at high and well as low duty cycles. The Driver 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 receivers, the data bus signal produced is 7.0 Volts minimum P-P at A-A’. (See Figure 4.) When both DATA and DATA inputs are held low or high, the Driver output becomes a high impedance and is “removed” from the line. In addition, an overriding “INHIBIT" input provides for the removal of the Driver output from the line. A logic “1” applied to the “INHIBIT” takes priority over the condition of the data inputs and disables the Driver. (See Driver Logic Waveforms, Figure 1) The Driver utilizes an active filter to suppress harmonics above 1 MHz to meet Macair specifications A-3818, A-4905, A-5232 and A-5690. The Driver may be safely operated for an indefinite period at 100% duty cycle into a data bus short circuit. Figure 1 - Driver 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). Aeroflex Circuit Technology 2 SCD4077 REV A 3/25/03 Plainview NY (516) 694-6700 Absolute Maximum Ratings Operating case temperature -55°C to +125°C Storage Case Temperature -65°C to +150°C Power Supply Voltages ±16 V Logic Input Voltage +7 V -0.3 V to +5.5 V Receiver Differential Input ±40 V Receiver Input Voltage (Common Mode) ±10V Driver Peak Output Current 300 mA Total Package Power Dissipation over the Full Operating Case Temperature Range 3.6 Watts 18°C Maximum Junction to Case Temperature Junction-Case, Thermal Resistance 5°C/W Electrical Characteristics, Driver 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" Input Voltage VIHD - - 0.7 V "1" Input Voltage VIHD 2.0 - - V -0.2 -0.4 mA 1.0 40 µA Inhibit Characteristics "0" Input Current VIN = 0.4 V IILI "1" Input Current VIN = 2.7 V IIHI - "0" Input Voltage VILI - - 0.7 V "1" Input Voltage VIHI 2 - - V 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 mVp-p Note 2 ZOI 2K - - Ω RL = 35 Ω VO 7 7.5 9 Vp-p tR & tF 200 250 300 nS ±90 mVpeak 300 nS Differential output noise, inhibit mode Differential output impedance (inhibited) Output Characteristics Differential output level 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 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 VOS tDTX 3 240 SCD4077 REV A 3/25/03 Plainview NY (516) 694-6700 Power Data Power Supply Currents (Power Supplies set at +15V, -15V, +5V) Parameter Condition Symbol Min Typ Max Driver Standby ICC IEE IL 15 27 13 30 50 20 25% duty cycle ICC IEE IL 34 50 14 50 80 20 50% duty cycle ICC IEE IL 50 70 14 80 100 20 100% duty cycle ICC IEE IL 110 120 13 140 150 20 Unit mA 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 SCD4077 REV A 3/25/03 Plainview NY (516) 694-6700 Figure 2 - Driver (TX) Output Wave form Figure 3 - Driver (TX) Output offset Last Bit tf* 90% Magnified View OUTPUT OFFSET* 6.5V P-P MIN 8.5V P-P MAX 0 Volts 0 Volts OUTPUT OFFSET* 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 4 - Typical Transformer connection 70Ω Figure 5 - Power Dissipation vs. Duty Cycle 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 3.5 3.0 2.5 (TYPICAL) 2.0 1.5 1.0 0.5 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’, power on or off. 3. Specifications apply over the temperature range of -55°C to +125°C (case temperature) unless otherwise noted. 4. All typical values are measured at +25°C The information contained in this data sheet is believed to be accurate; however, Aeroflex Circuit Technology. assumes no responsibility for its use, and no licence or rights are granted by implication or otherwise in connection therewith. Aeroflex Circuit Technology 5 SCD4077 REV A 3/25/03 Plainview NY (516) 694-6700 CIRCUIT TECHNOLOGY Ordering Information Model No. Case ACT4077 Plug In ACT4077-FP Flat Pack PLUG-IN PACKAGE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 1.27 MAX 1.10 24 13 1.27 MAX 1.10 12 Designator Pin 1 & ESD 0.175 MAX 0.24 MIN 0.018 DIA. ±0.002 FLAT PACKAGE Pin #’s & Functions 0.100 +15V (TX) NC TX DATA IN TX GND (+5V) TX INHIBIT +5V TX DATA IN NC CASE GND GND NC -15V (TX) NC NC NC TX DATA OUT NC NC NC NC TX DATA OUT NC NC NC 1.255 MAX 0.015 ±0.003 Designator Pin 1 & ESD 1.255 MAX 0.100 Typ 0.500 MIN 2 sides 0.010 ±0.002 0.175 MAX 0.072 ±0.012 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 Telephone: (516) 694-6700 FAX: (516) 694-6715 Toll Free Inquiries: (800) 843-1553 E-Mail: [email protected] Aeroflex Circuit Technology 35 South Service Road Plainview New York 11803 www.aeroflex.com Aeroflex Circuit Technology 6 SCD4077 REV A 3/25/03 Plainview NY (516) 694-6700