Standard Products ACT4419D Dual Variable Amplitude Transceiver for MIL-STD-1553 April 16, 2007 FEATURES ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Dual transceiver meets military data bus requirements – MIL-STD-1553 Low standby power Low power dissipation at full output power Single +5V power supply +5V Control line Current source output 0.3" x 1.2", ceramic, 18 lead DIP or flat package Designed for commercial, industrial and aerospace applications Processed and screened to MIL-STD-883 specifications Aeroflex is a Class H & K MIL-PRF-38534 Manufacturer DESC SMD pending GENERAL DESCRIPTION The Aeroflex Plainview model ACT4419D is a monolithic transceiver which provides variable amplitude in full compliance with MIL-STD-1553 data bus requirements with low standby power consumption 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 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 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 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). 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). A low level at the Strobe input inhibits the DATA and DATA outputs. SCD4419D Rev J VCONT Channel B TX/RX TX DATA IN DRIVER TX DATA IN TRANSMIT ACTIVE FILTER OUTPUT STAGE REFERENCE COMP. RECEIVE ACTIVE FILTER COMP. TX/RX TX INHIBIT +5 V Channel A Channel B RX DATA OUT GROUND INPUT AMP RX DATA OUT STROBE BLOCK DIAGRAM (WITHOUT TRANSFORMER, CHANNEL A SHOWN) 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 1 - TRANSMITTER LOGIC WAVEFORMS LINE TO LINE INPUT DATA OUT DATA OUT Note overlap FIGURE 2 - RECEIVER LOGIC WAVEFORMS Aeroflex Plainview SCD4419D Rev J 4/16/07 2 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 10°C Thermal Resistance – Junction to 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 * - 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 & tF 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/ - VOΔD 0 ±71 ±142 mVp-p Output Voltage Delta, Pt. B - B’ 5/ - VOΔS 0 ±200 ±400 mVp-p - RCONT - 5 - KΩ INHIBIT CHARACTERISTICS 2/ * See Aeroflex Application note# 113 for reference. OUTPUT CHARACTERISTICS Rise and Fall times Output Offset 4/ Control Line Input Resistance Aeroflex Plainview SCD4419D Rev J 4/16/07 3 ELECTRICAL CHARACTERISTICS – RECEIVER SECTION 1/ 3/ Parameter Differential Voltage Range Condition Symbol Min Point A - A’ VIDR - - CMRR 45 Common Mode Rejection Ratio Typ Max Unit 20 V peak - - dB STROBE CHARACTERISTICS (Logic "0" Inhibits Output) "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 VTH 0.60 0.8 1.15 Vp-p THRESHOLD CHARACTERISTICS (Sinewave Input ) Input Threshold Voltage(referred to the bus) 100KHz1MHz 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 mAt 65 mA 25% duty cycle 155 mA 185 mA 50% duty cycle 290 mA 335 mA 100% duty cycle 560 mA 650 mA +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 (ΔVO) = VO(IDEAL) - VO(MEASURED), where VO(IDEAL) = Slope x VCONT and Slope = ΔVO ÷ ΔVCONT, See Figure 3. Aeroflex Plainview SCD4419D Rev J 4/16/07 4 VO PK-PK @ A–A' FS 7.1 LAST BIT 0.8FS Slope = ΔVO ÷ ΔVCONT Magnified View OUTPUT OFFSET* 4.26 0.6FS 2.84 0.4FS 1.42 0.2FS OUTPUT OFFSET* 2.5 µsec 0 0 *Offset measured at point A-A’ in Figure 5 VCONT dc 1 2 3 4 5 CONTROL VOLTAGE FIGURE 3 – TRANSMITTER OUTPUT AMPLITUDE (Vo) vs. VCONT VOLTAGE 70Ω FIGURE 4 – TRANSMITTER (TX) OUTPUT OFFSET 70Ω ZO 55Ω 1:2.5 TX DATA OUT P A B D.U.T Center Tap P’ TX DATA OUT B’ 1:1.77 for stub coupling A’ 55Ω 1600 POWER DISSIPATION MILLIWATTS OUTPUT AMPLITUDE 5.68 RX DATA IN 1400 1200 Maximum 1000 800 Typical 600 400 200 RX DATA IN 0 0 VCONT = 0 – 5Vdc 20 30 40 50 60 70 80 90 100 DUTY CYCLE – PERCENT Transformer: Use Technitrol 1553-45 or Equivalent FIGURE 5 – TYPICAL TRANSFORMER CONNECTION 10 Note: Vcc = 5 Volts, Vbus (Pt. A-A') at 7.1 Volts P-P FIGURE 6 – POWER DISSIPATION vs. DUTY CYCLE (Total hybrid with one channel transmitting and the other in standby) Aeroflex Plainview SCD4419D Rev J 4/16/07 5 PACKAGE PIN OUT DESCRIPTION - ACT4419D Pin # Function Pin # Function 1 VCONT A & B (0 – 5VDC) 11 RX DATA OUT B 2 TX/RX A 12 RX DATA OUT B 3 TX/RX A 13 TX INHIBIT B 4 STROBE A 14 TX DATA IN B 5 GROUND A 15 TX DATA IN B 6 +5Vdc A & B 16 RX DATA OUT A 7 TX/RX B 17 RX DATA OUT A 8 TX/RX B 18 TX INHIBIT A 9 STROBE B 19 TX DATA IN A 10 GROUND B 20 TX DATA IN A PACKAGE DIMENSIONS 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 ESD Triangle Identifies Pin 1 .140 MAX .310 MAX .300 ±.010 Notes 1. Dimensions shown are in inches Aeroflex Plainview SCD4419D Rev J 4/16/07 6 CONFIGURATIONS AND ORDERING INFORMATION Model No. DSCC No. Receiver Data level Case Lead Finish N/A Normally Low DIP Optional ACT4419-D * ACT4419-D-001-1 Pending Gold ACT4419-D-001-2 Pending Solder ACT4419-DF * N/A Flat Pack Optional ACT4419-D-001-1 Pending Gold ACT4419-D-001-2 Pending Solder * For 10V Control voltage consult factory. PLAINVIEW, NEW YORK Toll Free: 800-THE-1553 Fax: 516-694-6715 INTERNATIONAL Tel: 805-778-9229 Fax: 805-778-1980 NORTHEAST Tel: 603-888-3975 Fax: 603-888-4585 SE AND MID-ATLANTIC Tel: 321-951-4164 Fax: 321-951-4254 WEST COAST Tel: 949-362-2260 Fax: 949-362-2266 CENTRAL Tel: 719-594-8017 Fax: 719-594-8468 www.aeroflex.com [email protected] 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. Our passion for performance is defined by three attributes represented by these three icons: solution-minded, performance-driven and customer-focused SCD4419D Rev J 4/16/07 7