Standard Products ACT4455/4459 Single Supply Transceiver for MIL-STD-1553/1760 & SAE-AS15531 www.aeroflex.com/Avionics November 5, 2008 FEATURES ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Small size, light weight and low standby power single transceiver Single +5V power supply Monolithic construction Outstanding MIL-STD-1553 / SAE-AS15531 performance Designed for commercial, industrial and aerospace applications Processed and screened to MIL-STD-883 specs MIL-PRF-38534 compliant devices Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer Packaging – 28-pad Ceramic LCC, Hermetic DSCC SMD: 5962–96741 approved GENERAL DESCRIPTION The Aeroflex-Plainview ACT4455/4459 series are next generation monolithic transceiver designs which provide full compliance with MIL-STD-1553A/B, MIL-STD-1760 and SAE-AS15531 requirements in the smallest packages with low power consumption and single power supply operation. 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. All inputs are internally pulled up to +5 Volts. TRANSMITTER The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1:2.5 ratio transformer the data bus signal is typically 7.5 volts 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 Waveform, Figure 1). The Transmitter may be safely operated for an indefinite period with the bus (point A-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 Receiver Logic Waveform, Figure 2). 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 connection). A low level at the Strobe input inhibits the DATA and DATA outputs. SCD4455 Rev C TX DATA IN TX DATA IN TX INHIBIT +5 V TX GND1 TX GND2 TX GND3 RX GND RX DATA IN RX DATA IN STROBE 1,28 TX DATA OUT ACTIVE FILTER OUTPUT STAGE 4,5 TX DATA OUT REFERENCE COMP. 13 RX DATA OUT ACTIVE FILTER COMP. 10 RX DATA OUT 25 26 DRIVER 24 2,3,9,15,23 6 27 16 22 19 18 INPUT AMPLIFIER 11 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 * See Figure 7 for Actual Waveforms FIGURE 2 – RECEIVER LOGIC WAVEFORMS IDEALIZED * SCD4455 Rev C 11/5/08 2 Aeroflex Plainview ABSOLUTE MAXIMUM RATINGS Operating case temperature -55°C to +125°C Storage case temperature -65°C to +150°C Power supply voltage -0.3VDC to +7.0VDC Logic input voltage -0.3VDC to +5.5VDC Receiver differential input ±10 V Receiver input voltage (common mode) ±5 V Driver peak output current 1.0 A Total package power dissipation over the full operating case temperature range 2.0 Watts 10°C Maximum junction to case temperature 5°C/W Thermal resistance – Junction to case ELECTRICAL CHARACTERISTICS – DRIVER SECTION INPUT CHARACTERISTICS, TX DATA IN OR TX DATA IN (Notes 2 & 3 Apply) Parameter Condition Symbol Min Typ Max Unit "0" Input Current VIN = 0.4V IILD - -0.2 -0.4 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 - -0.2 -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 - 250 450 nS Delay from TX inhibit, (1➝0) to active output tDXON - 150 250 nS Differential Output Noise, inhibit mode VNOI - 2 10 mVp-p Note 1 ZOI 2K - - Ω RL = 35 Ω VO 6.5 7.5 9 Vp-p tr 100 200 300 nS VOS - - ±90 mVpeak tDTX - 120 250 nS 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 Figure 5, 2.5 µS after midpoint crossing of the parity bit of the last word of a 660µS message Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential signal SCD4455 Rev C RL = 35 Ω ELECTRICAL CHARACTERISTICS – RECEIVER SECTION Parameter Differential Voltage Range (See Figure 5, point P-P’) Condition Symbol Min Typ Max Unit TXFMR 2.5:1 VIDR - 14 20 Vp-p CMRR 45 - - dB Common Mode Rejection Ratio (Note 3) 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 - 50 200 nS 0.56 0.82 1.10 Vp-p THRESHOLD CHARACTERISTICS (SINEWAVE INPUT ) Internal Threshold Voltage (Referred to the bus) 100KHz-1MHz VTH OUTPUT CHARACTERISTICS, RX DATA AND RX DATA "1" State IOH = -0.4mA VOH 2.5 3.7 - V "0" State IOL = -4mA VOL - 0.35 0.5 V Delay, (average) from differential input zero crossings to RX DATA and RX DATA output 50% points tDRX - 340 500 nS POWER DATA POWER SUPPLY CURRENTS – PER CHANNEL Transmitter Standby - 18 30 - 150 220 50% Duty Cycle - 300 395 100% Duty Cycle - 600 745 +4.75 +5.00 +5.50 25% Duty Cycle (Note 4) ICC mA POWER SUPPLY VOLTAGE VCC Operating Power Supply Voltage Range V NOTES: 1. Power on or off, measured from 75KHz to 1MHz at point A-A' and transformer self impedance of 3KΩ minimum. 2. Vcc = 5 Volts ±0.1 V, bypassed by 2.2 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 at point A-A’ with ± 10 Volt peak, line to ground, DC to 2MHz. 4. Typical power is measured with Vbus at point A-A’ = 7.5 Vp-p. SCD4455 Rev C 11/5/08 4 Aeroflex Plainview LAST BIT tf * 90% Magnified View * OUTPUT OFFSET 6V P-P MIN 9V P-P MAX 0 Volts 0 volts * OUTPUT OFFSET 10% 2.5 µsec tr * *Offset measured at point A-A' in Figure 5 * Rise and fall times measured at point A-A' in Figure 5 FIGURE 3 – TRANSMITTER (TX) OUTPUT WAVEFORM FIGURE 4 – TRANSMITTER (TX) OUTPUT OFFSET 2200 70Ω 70Ω 2000 TX DATA OUT 52.5Ω N1:N2 P B A Center N1:N3 for Stub Tap Coupling ACT4455 TX DATA OUT P' A' B' POWER DISSIPATION MILLIWATTS 1800 1600 1400 1200 Maximum 1000 Typical 800 600 52.5Ω RX DATA IN 400 RX DATA IN 200 Transformer turns ratios: N1:N2 = 1:2.5 N1:N3 = 1:1.77 Use Technitrol 1553-45 or equivalent FIGURE 5 – TYPICAL TRANSFORMER DIRECT CONNECTION SCD4455 Rev C 0 0 10 20 30 40 50 60 70 80 90 100 DUTY CYCLE – PERCENT Note: Vcc = 5VDC, Transformer ratio 1:2.5, VBUS (pt A-A') at 7.5Vp-p FIGURE 6 – POWER DISSIPATION VS. DUTY CYCLE S TA RT O F WO R D – 3 3 WO R D T R A N S M I S S IO N TX DATA IN CH 2 BUS OUT Point A–A' See Figure 5 CH 1 RX DATA OUT CH 3 RX DATA OUT CH 4 E N D O F WO R D – 3 3 WO R D T R A N S M I S S I O N TX DATA IN CH 2 BUS OUT Point A–A' See Figure 5 CH 1 RX DATA OUT CH 3 RX DATA OUT CH 4 * Oscilloscope used is a TEK TDS540 with Probe 6139A. FIGURE 7 ACTUAL HYBRID WAVEFORMS * – 25°C TYPICAL SCD4455 Rev C 11/5/08 6 Aeroflex Plainview LCC LEADLESS CHIP CARRIER PACKAGE CONFIGURATION * ACT4455 88379 MADE IN USA * NOTE: Castellation spacing .050 x6, Tol. Non-Accumulative PIN NUMBERS & FUNCTIONS Pin # Function Pin # Function 1 TX DATA OUT 15 +5V 2 +5V 16 TX GND3 ** 3 +5V 17 NC 4 TX DATA OUT 18 RX DATA IN 5 TX DATA OUT 19 RX DATA IN 6 TX GND1 ** 20 NC 7 NC 21 NC 8 NC 22 RX GND ** 9 +5V 23 +5V 10 RX DATA OUT 24 TX INHIBIT 11 STROBE 25 TX DATA IN 12 NC 26 TX DATA IN 13 RX DATA OUT 27 TX GND2 ** 14 NC 28 TX DATA OUT ** NOTE: Grounds not Internally connected SCD4455 Rev C 11/5/08 7 Aeroflex Plainview ORDERING INFORMATION MODEL # DSCC SMD # SCREENING RECEIVER DATA LEVEL - Military Temperature, -55°C to +125°C Screened in accordance with MIL-PRF-38534, Class H. Normally Low In accordance with DSCC SMD 5962-96741 Normally Low In accordance with DSCC SMD 5962-96741 Normally High ACT4455 ACT4455-001-1 5962-9674101H3C ACT4455-001-2 5962-9674101H3A ACT4459-001-1 5962-9674102H3C ACT4459-001-2 5962-9674102H3A 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. SCD4455 Rev C 11/5/08 Our passion for performance is defined by three attributes represented by these three icons: solution-minded, performance-driven and customer-focused 8