ACT4419D Dual Variable Amplitude Transceivers for MIL-STD-1553 Features • World’s smallest and lowest standby power dual variable amplitude transceiver 0.3" x 1.2" packages • Lowest standby power • Dual transceiver meets military data bus requirements, MIL-STD-1553 • Low power dissipation at full output power • Single +5V power supply • Current source output • Monolithic construction using Dielectrically Isolated (D.I.) • Processed and screened to MIL-STD-883 specs • Radiation Hard to 300 KRADS total dose • DESC SMD pending • +5V Control line ACT4419D Dual Transceivers Channel B V CONT TX/RX TX DATA IN DRIVER SHAPING TX DATA IN OUTPUT STAGE TX/RX CIRCUIT TECHNOLOGY www.aeroflex.com General Description The Aeroflex Circuit Technology model ACT4419D is a next generation D.I. monolithic transceiver which provides variable amplitude in full compliance with MIL-STD-1553 data bus requirements with the lowest standby power consumption available and one power supply operation. The dual channel model ACT4419D performs the front-end analog function of inputting and outputting data through a transformer to a 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. Variable amplitude is adjusted with factory preset 0 – 5 Vdc control line at 1 mA maximum input current at 5 Volts. Transmitter TX INHIBIT Channel A +5 V Channel B REFERENCE COMP. ACTIVE FILTER COMP. RX DATA OUT GROUND INPUT AMP RX DATA OUT STROBE Block Diagram (without Transformer, Channel A shown) The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a primary grounded center tap 1:2.5 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 © SCD4419D REV G 5/10/00 receivers, the data bus signal produced is 7.1 Volts nominal P-P at A-A’ (See Figure 5). When both DATA and DATA inputs are held low, 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 Waveform, Figure 1). 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 CIRCUIT TECHNOLOGY 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 Waveform, Figure 2). Note: Receiver outputs are normally low. The pre-set internal thresholds will detect data bus signals exceeding 1.150 Volts P-P and reject signals less than 0.6 Volts P-P when used with a 1:2.5 turns ratio transformer. (See transformer data and typical connection, Figure 5). Figure 1 - Transmitter Logic Waveforms DATA IN DATA IN INHIBIT LINE TO LINE OUTPUT NOTES: 1. DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them. 2. DATA and DATA must be in the same state during off time (both low). Figure 2 - Receiver Logic Waveforms LINE TO LINE INPUT DATA OUT DATA OUT Aeroflex Circuit Technology Note overlap 2 SCD4419D REV G 5/10/00 Plainview NY (516) 694-6700 Absolute Maximum Ratings Operating Case Temperature -55°C to +125°C Storage Case Temperature -65°C to +150°C Positive Power Supply Voltage +5.0 V to +7.0 V Receiver Differential Input ±10 V Receiver Input Voltage (Common Mode) ±5 V Driver Peak Output Current 650 mA 2 Watt Total Package Power Dissipation over the Full Operating Case Temperature Rise (Note: Normal operation conditions require one transmitter on and the other off at any given time. Maximum Junction To Case Temperature Rise for the Hottest Device 10°C Thermal Resistance, Junction to Bottom of Case 5°C/W Electrical Characteristics – Driver Section 1/ 3/ 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 40 µA "0" Input Voltage - VILD - - 0.7 V "1" Input Voltage - VIHD 2.0 - - V "0" Input Current VIN = 0.4V IILI - -0.2 -0.4 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 - 200 300 nS Delay from TX inhibit, (1→0) to active output - tDXON - 100 180 nS Differential Output Noise, inhibit mode - VNOI - 2 10 mVp-p Differential Output Impedance 2/ - ZOI 2K - - Ω Differential output level (direct coupled stub) Pt. A - A’ VO 6.6 7.1 7.6 V p-p Differential output level (transformer coupled) Pt. B - B’ VO 18.7 20.1 21.5 V p-p - tR & t F 100 170 300 nS Pt. A - A’ VOS - - ±90 mV peak Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential signal - tDTX - 120 180 nS Output Voltage Delta, Pt. A - A’ 5/ - VO∆D 0 ±71 ±142 mVp-p Output Voltage Delta, Pt. B - B’ 5/ - VO∆S 0 ±200 ±400 mVp-p Control Line Input Resistance - RCONT - 5 - KΩ Aeroflex Circuit Technology 3 Inhibit Characteristics Output Characteristics Rise and Fall times Output Offset 4/ SCD4419D REV G 5/10/00 Plainview NY (516) 694-6700 Electrical Characteristics – Receiver Section Parameter Differential Voltage Range Condition Symbol Min Pt. A - A’ VIDR - - CMRR 45 Common Mode Rejection Ratio 1/ 3/ Typ - Max Unit 20 V peak - dB Strobe Characteristics (Logic "0" inhibits output) (NOTE: If not used, a 1K pullup to 5V is recommended) "0" Input Current VS = 0.4 V 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) - tSD(ON) - 90 150 nS Strobe Delay (turn-off) - tSD(OFF) - 90 150 nS 100KHz1MHz VTH 0.60 0.8 1.15 Vp-p Threshold Characteristics (Sinewave input ) Input Threshold Voltage(referred to the bus) Output Characteristics, RX DATA and RX DATA "1" State IOH = -0.4 mA VOH 2.5 3.5 - V "0" State IOL = 4 mA VOL - 0.3 0.5 V - tDRX - 320 400 nS Delay, (average)from differential input zero crossings to RX DATA and RX DATA output 50% points Power Data 1/ 3/ Maximum Current per Channel (other channel in standby) Duty Cycle Typ Max Transmitter Standby 50 mA 65 mA 25% duty cycle 155 mA 185 mA 50% duty cycle 290 mA 335 mA 100% duty cycle 560 mA 650 mA Power Supply Voltage Range +V 4.75 to 5.5 Volts Notes: 1. VCC = 5 Volts ±0.1 V, TC = -55°C to +125°C, unless otherwise specified. 2. Power ON/OFF, measured from 75KHz to 1MHz at Point A-A’. See Figure 5. 3. All typical values are measured at +25°C. 4. At point A-A’ on Figure 5, 2.5 µS after midpoint crossing of the parity bit of the last word of a 660 µS message. 5. Output Voltage Delta (VO∆) = VO(IDEAL) - VO(MEASURED), where VO(IDEAL) = Slope x VCONT and Slope = ∆VO ÷ ∆VCONT, See Figure 3. Aeroflex Circuit Technology 4 SCD4419D REV F 2/10/00 Plainview NY (516) 694-6700 Figure 4 – Transmitter (TX) Output Offset Figure 3 – Transmitter Output Amplitude (VO) vs VCONT Voltage VO PK-PK @ A–A' 7.1 OUTPUT AMPLITUDE 5.68 FS Slope = ∆VO ÷ LAST BIT 0.8FS ∆VCONT Magnified View OUTPUT OFFSET* 4.26 0.6FS OUTPUT OFFSET* 2.84 0.4FS 2.5 µsec 1.42 0.2FS *Offset measured at point A-A’ in Figure 5 0 0 VCONT dc 1 2 3 4 5 CONTROL VOLTAGE Figure 6 – Power Dissipation vs. Duty Cycle (Total hybrid with one channel transmitting and the other in standby) Figure 5 – Typical Transformer Connection 70Ω 70Ω ZO TX DATA OUT 55Ω 1:2.5 P A B D.U.T TX DATA OUT Center Tap P’ POWER DISSIPATION MILLIWATTS 1600 B’ 1:1.77 for stub coupling A’ 55Ω RX DATA IN 1400 1200 Maximum 1000 800 Typical 600 400 200 RX DATA IN 0 0 VCONT = 0 – 5Vdc 10 20 30 40 50 60 70 80 90 100 DUTY CYCLE – PERCENT Transformer: Use Technitrol 1553-45 or Equivalent Note: Vcc = 5 Volts, Vbus (Pt. A-A') at 7.1 Volts P-P Configurations and Ordering Information Model No. DESC No. Receiver Data level Case Specs. Configuration ACT4419-D * Pending Normally Low DIP 1553 Dual ACT4419-DF * Pending Normally Low Flat Package 1553 Dual * For 10V Control voltage consult factory. Aeroflex Circuit Technology 5 SCD4419D REV G 5/10/00 Plainview NY (516) 694-6700 CIRCUIT TECHNOLOGY Package Dimensions and Pin Outs Pin #’s & Functions Flat Package 1.200 MAX .900 9 Equal Spaces @.100 .140 MAX .065 ±.015 .030 ±.010 .100 ±.005 .310 MAX .175 or .300 MIN MIN .040 ESD Triangle Identifies Pin 1 .010 ±.002 TYP .018 ±.002 DIP Package .170 MIN 1.200 MAX .900 9 Equal Spaces @.100 .100 ±.005 .140 MAX .310 MAX ESD Triangle Identifies Pin 1 .300 ±.010 Notes 1. Dimensions shown are in inches 1 VCONT A & B (0 – 5Vdc) 2 TX/RX A 3 TX/RX A 4 STROBE A 5 GROUND A 6 +5Vdc A & B 7 TX/RX B 8 TX/RX B 9 STROBE B 10 GROUND B 11 RX DATA OUT B 12 RX DATA OUT B 13 TX INHIBIT B 14 TX DATA IN B 15 TX DATA IN B 16 RX DATA OUT A 17 RX DATA OUT A 18 TX INHIBIT A 19 TX DATA IN A 20 TX DATA IN A Specifications subject to change without notice. Aeroflex Circuit Technology 35 South Service Road Plainview New York 11803 Aeroflex Circuit Technology Telephone: (516) 694-6700 FAX: (516) 694-6715 Toll Free Inquiries: 1-(800)THE-1553 6 SCD4419D REV F 2/10/00 Plainview NY (516) 694-6700