Standard Products ACT4458/4464 Single Supply Dual Transceivers for MIL-STD-1553/1760 www.aeroflex.com/Avionics October 20, 2004 FEATURES ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Small size, light weight and low standby power dual transceiver Single +5V power supply Monolithic construction Input and output TTL compatible design Processed and screened to MIL-STD-883 specs MIL-PRF-38534 compliant devices available Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer DESC SMD# 5962–92061 ACT4458 Case Style Actual Size GENERAL DESCRIPTION The Aeroflex-Plainview ACT4458/4464 series are next generation monolithic transceiver designs which provides full compliance with MIL-STD-1553A/B and 1760 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. Each channel of the dual transceiver is completely separate from the other and fully independent. This includes power leads as well as signal lines. Hence, each channel may be connected to a different data bus with no interaction. 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. If unused, a 2K pull-up to +5 Volts is recommended. SCD4458 Rev B TX DATA OUT TX DATA IN DRIVER TX DATA IN ACTIVE FILTER OUTPUT STAGE TX DATA OUT REFERENCE COMP. RX DATA OUT ACTIVE FILTER COMP. TX INHIBIT +5 V +5V RTN RX DATA IN INPUT AMPLIFIER RX DATA IN RX DATA OUT 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 * * See Figure 7 for Actual Waveforms SCD4458 Rev B 2 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 ±10 V Receiver differential input ±5V Receiver input voltage (common mode) 800 mA Driver peak output current 2.0 Watts Total package power dissipation over the full operating case temperature range (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 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 - 250 350 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 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 600µS message RL = 35 Ω Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential signal SCD4458 Rev B 3 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 - 50 100 nS 0.60 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 - 340 400 nS POWER DATA POWER SUPPLY CURRENTS – PER CHANNEL Transmitter Standby - 18 30 - 150 175 50% Duty Cycle - 300 350 100% Duty Cycle - 600 700 +4.75 +5.00 +5.50 25% Duty Cycle (Note 4) ICC mA POWER SUPPLY VOLTAGE VCC Operating Power Supply Voltage Range 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. SCD4458 Rev B 4 V LAST BIT tf* 90% Magnified View 6V P-P MIN 9V P-P MAX OUTPUT OFFSET * OUTPUT OFFSET * 0 volts 0 Volts 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 70Ω FIGURE 4 – TRANSMITTER (TX) OUTPUT OFFSET 70Ω 2000 TX DATA OUT 52.5Ω N1:N2 P B A Center Tap TX DATA OUT P' POWER DISSIPATION MILLIWATTS 1800 N1:N3 for Stub Coupling A' B' 1600 1400 1200 Maximum 1000 Typical 800 600 52.5Ω RX DATA IN 400 RX DATA IN 200 0 0 Transformer turns ratios: N1:N2 = 1:2.5 N1:N3 = 1:1.77 Use Technitrol 1553-45 or equivalent 10 20 30 40 50 60 70 80 90 100 DUTY CYCLE – PERCENT Note: Vcc=5 Volts,Transformer ratio 1:2.5, Vbus (pt A-A') at 7.5 Volts P-P FIGURE 6 – POWER DISSIPATION VS. DUTY CYCLE (Total, hybrid with one channel transmitting and the other not powered) FIGURE 5 – TYPICAL TRANSFORMER DIRECT CONNECTION SCD4458 Rev B 5 STA RT O F WO R D – 3 3 WO R D TRA NS M IS 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 E ND O F WO RD – 3 3 WO R D T RA NS M IS 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 SCD4458 Rev B 6 PIN NUMBERS & FUNCTIONS Pin # Function Channel 1 TX DATA OUT/RX DATA IN A 2 TX DATA OUT/RX DATA IN A 3 GROUND 1 A 4 RX DATA OUT A 5 STROBE A 6 RX DATA OUT A 7 TX DATA OUT/RX DATA IN B 8 TX DATA OUT/RX DATA IN B 9 GROUND 1 B 10 RX DATA OUT B 11 STROBE B 12 RX DATA OUT B 13 GROUND 2 B 14 +5V B 15 GROUND 3 B 16 INHIBIT B 17 TX DATA IN B 18 TX DATA IN B 19 GROUND 2 A 20 +5V A 21 GROUND 3 A 22 INHIBIT A 23 TX DATA IN A 24 TX DATA IN A SCD4458 Rev B 7 CONFIGURATIONS AND ORDERING INFORMATION Model No. DESC No. Receiver Data level ACT 4458 5962-9206107 Normally Low ACT 4464 5962-9206108 Normally High Configuration Dual FLAT PACKAGE CONFIGURATION AND PINOUTS PIN 1 0.596 MAX 0.410 MIN 0.808 MAX 0.550 11 Equal Spaces at 0.050 Noncumulative 0.018 MAX 0.010 ± 0.003 0.056 MAX 0.095 MAX 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 w w w .a e ro fle x .c o m 0.050 ± 0.005 in fo -a m s @ a e ro fle x .c o m 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 SCD4458 Rev B 8