Standard Products ACT4402 Single Transceiver for MIL-STD-1553A/B, MIL-STD-1760 & SAE-AS15531 www.aeroflex.com/Avionics May 11, 2005 FEATURES ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Small size, light weight and low power dissipation single transceiver +5VDC / ±15VDC power supply operation Outstanding MIL-STD-1553 / SAE-AS15531 performance Monolithic construction Input and output TTL compatible design Replacement for Aeroflex's 3402 & 2402 Designed for commercial, industrial and aerospace applications MIL-PRF-38534 compliant devices available Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer Packaging – Hermetic Ceramic - Available in a 24pin Ceramic Housing which is 21% smaller than the metal plug-in - Non-conductive mounting surface - No package glass beads - Small size & light weight DESCRIPTION The Aeroflex-Plainview ACT4402 is the next generation monolithic transceiver design which provides full compliance with MIL-STD-1553A/B, MIL-STD-1760 and meets SAE-AS15531 requirements in a small ceramic package with low power consumption. The series performs the front-end analog function of inputting and outputting data through a transformer to the 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. TRANSMITTER The transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1.4:1 ratio transformer the data bus signal is typically 7.5 Volts P-P at Point 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 Figure 1 Transmitter Logic Waveform). The Transmitter may be safely operated for an indefinite period with the bus (Point A) short circuited at 100% duty cycle. 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 Figure 2 Receiver Logic Waveform). The pre-set internal thresholds will detect data bus signals exceeding 1.20 Volts P-P and reject signals less than 0.6 Volts P-P when used with a transformer (See Figure 5 for transformer data and typical connections). A low level at the RX Strobe input inhibits the DATA and DATA outputs. If unused RX Strobe is internally pulled high. SCD402 Rev C TX DATA IN TX DATA OUT DRIVER TX DATA IN ACTIVE FILTER OUTPUT STAGE TX DATA OUT REFERENCE COMP. RX DATA OUT ACTIVE FILTER COMP. TX INHIBIT +5 V (VL) +15 V (+Vcc) -15 V (-VEE) GND RX DATA IN RX DATA IN INPUT AMPLIFIER RX DATA OUT RX STROBE BLOCK DIAGRAM (WITHOUT TRANSFORMER) DATA IN DATA IN INHIBIT LINE TO LINE OUTPUT Note: DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them, and must be in the same state during off times (both high or low). FIGURE 1 – TRANSMITTER LOGIC WAVEFORMS IDEALIZED LINE TO LINE INPUT STROBE DATA OUT DATA OUT Note overlap FIGURE 2 – RECEIVER LOGIC WAVEFORMS IDEALIZED SCD402 Rev C 2 ABSOLUTE MAXIMUM RATINGS Operating case temperature -55°C to +125°C Storage case temperature -65°C to +150°C Power supply voltage VCC VEE VL -0.3 VDC to +18 VDC +0.3 VDC to -18 VDC -0.3 VDC to +7.0 VDC Logic input voltage -0.3VDC to +5.5VDC Receiver differential input ±40 Vp-p Receiver input voltage (common mode) ±10V Driver peak output current 200 mA Total package power dissipation over the full operating case temperature range 2.5 Watts Maximum junction to case temperature 10°C Thermal resistance – Junction to case 4°C/W ELECTRICAL CHARACTERISTICS – DRIVER SECTION (Note 2) INPUT CHARACTERISTICS, TX DATA IN OR TX DATA IN Parameter Condition Symbol Min Typ Max Unit "0" Input Current VIN = 0.4V IILD - -0.2 -0.2 mA "1" Input Current VIN = 2.7V IIHD - 1 40 µA "0" Input Voltage VILD - - 0.7 V "1" Input Voltage VIHD 2.0 - - V INHIBIT CHARACTERISTICS "0" Input Current VIN = 0.4V IILI - -0.1 -0.2 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 - 175 200 nS Delay from TX inhibit, (1➝0) to active output tDXON - 90 200 nS Differential Output Noise, inhibit mode VNOI - 2 10 mVp-p Point B ZOI 2K - - Ω Point C ZOI 1K - - Ω Figure 5 Point A VO 6 7.5 9 Vp-p tr 100 160 200 nS Output offset. See Figure 3. 2.5 µS after midpoint crossing of the parity bit of the last word of a 660µS message. VOS - - ±90 mVpeak Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential signal tDTX - 100 200 nS Differential Output Impedance (inhibited) Note 1 See Figure 5 OUTPUT CHARACTERISTICS Differential output level Rise and fall times (10% to 90% of p-p output) SCD402 Rev C 3 ELECTRICAL CHARACTERISTICS – RECEIVER SECTION (Note 2) Parameter Condition Symbol Min Typ Max Unit TXFMR 1.4:1 VIDR - - 40 Vp-p Note 3 CMRR 45 - - dB "1" State – Rx Data or Rx Data Output IOH = -0.4 mA VOH 2.5 3.7 - V "0" State – Rx Data or Rx Data Output IOI = 4 mA VOL - 0.35 0.5 V tDRX - 270 400 nS VTH 0.60 0.75 1.20 Vp-p Differential Voltage Range (See Figure 5, Point B) Common Mode Rejection Ratio Delay (average) from Differential Input Zero Crossings to RX DATA and RX DATA Output 50% points Input Threshold Voltage (referred to the bus) 100KHz–1MHz STROBE CHARACTERISTICS (LOGIC "0" INHIBITS OUTPUT) "0" Input Current VS = 0.4V 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 or Turn-off) tSD - 50 100 nS POWER DATA (Note 2) POWER SUPPLY CURRENTS – PER CHANNEL Transmitter Standby Note 4 ICC IEE IL - 0 12 18 1 16 30 25% Duty Cycle ICC IEE IL - 45 12 18 50 20 30 50% Duty Cycle ICC IEE IL - 90 12 18 100 20 30 100% Duty Cycle ICC IEE IL - 180 12 18 200 20 30 mA POWER SUPPLY VOLTAGE ±15V Operating Power Supply Voltage Range VCC VEE +14.25 -14.25 +15.00 +15.75 -15.00 -15.75 V V +5V Operating Power Supply Voltage Range VL +4.50 +5.00 V +5.50 NOTES: 1. Power on or off, measured from 75KHz to 1MHz at Point A and transformer self impedance of 3KΩ minimum at 1MHz. 2. Power Supplies: ±15VDC ±0.75V & +5VDC ±0.5V, bypassed by by 10 µF (Tantalum recommended) Capacitor minimum. All measurements & specifications apply over the temperature range of -55°C to +125°C (case temperature) unless otherwise specified. 3. When measured as shown in Figure 5 with ±10VPK, line to ground, DC to 2MHz. 4. Typical power is measured with VBUS at Point A = 7.5 Vp-p. SCD402 Rev C 4 Transformer Coupled Stub LAST BIT 70Ω ACT4402 Magnified View TX DATA OUT * OUTPUT OFFSET 0 Volts 1:1.4 52.5Ω 2:1 3 7 2 * OUTPUT OFFSET TX DATA OUT 2.5 µsec C A 1 5 T1553-2 52.5Ω RX DATA IN Zoi VCM RX DATA IN *Offset measured at Point A in Figure 5 FIGURE 3 – TRANSMITTER (TX) OUTPUT OFFSET Direct Coupled Stub ACT4402 TX DATA OUT 2 TX DATA OUT RX DATA IN 3600 55Ω 1.4:1 3 8 B A 4 1 T1553-2 55Ω Zoi RX DATA IN 3200 2.97W POWER DISSIPATION MILLIWATTS 2800 2400 Typical Hybrid Input Power Transformer Model use Technitrol Part# 1553-2 or equivalent 2000 1.87W FIGURE 5 – TYPICAL 1553 BUS CONNECTIONS 1600 1200 800 0.270 Typical Hybrid Dissipation 400 0 0 10 20 30 40 50 60 70 80 90 100 DUTY CYCLE – PERCENT Note: Vcc= +15V, VEE = -15V, VL= +5V, Transformer ratio 1.4:1, VBUS (Point A) at 7.5VP-P. FIGURE 4 – POWER DISSIPATION VS. DUTY CYCLE SCD402 Rev C 5 70Ω PIN NUMBERS & FUNCTIONS Pin # SCD402 Rev C Function 1 TX DATA OUT 2 TX DATA OUT 3 GROUND 4 NC 5 NC 6 NC 7 RX DATA OUT 8 STROBE 9 GROUND 10 RX DATA OUT 11 NC 12 NC 13 VCC 14 NC 15 RX DATA IN 16 RX DATA IN 17 NC 18 GROUND 19 VEE 20 +5 V 21 TX INHIBIT 22 TX DATA IN 23 TX DATA IN 24 NC 6 CONFIGURATIONS AND ORDERING INFORMATION Rx Standby Case Style ACT4402 Normally Low Ceramic Dip ACT4402-I Normally High Model No. CERAMIC PACKAGE OUTLINE 24 13 12 Pin# 1 & ESD Designator 1.270 MAX .200 MAX .620 MAX .150 MIN .030 .010 .019 .015 .050 TYP .610 .590 .012 .008 All dimensions in inches 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. SCD402 Rev C Our passion for performance is defined by three attributes represented by these three icons: solution-minded, performance-driven and customer-focused 7