ACT 4454 / 4460 Single Supply Transceivers for MIL-STD-1553A/B & MacAir A3818, A4905, A5232 & A5690 Features • Single 5 Volt Supply Operation • Low Power Dissipation • Small Size & Light Weight • Dual Transceivers Save Space & Cost • Outstanding MIL-STD-1553A/B and MacAir A3818, A4905, A5232, A5690 Performance • Processed and Screened to Mil-STD-883 Specs • Radiation Hard Dielectric Isolation Monolithic Construction for Severe Space Environments • Superior High Frequency Line Transient and Input Ripple Rejection • Input and Output TTL Compatible Design • DESC SMD# 5962-92061 CIRCUIT TECHNOLOGY www.aeroflex.com General Description The Aeroflex Circuit Technology ACT4454 / 4460 series are next generation monolithic transceiver designs which provides full compliance with MIL-STD-1553A/B and MacAir A3818, A5690, A5232 & A4905 requirements in the smallest packages with low power consumption and single power supply operation. The ACT4454 / 4460 series performs the front-end analog function of inputting and outputting data through a transformer to the MIL-STD-1553 data bus. The ACT4454 / 4460 series can be considered a "Universal" Transceiver in that it is compatible with MIL-STD-1553A & B, Macair A-3818, A-4905, A-5232 and A-5690. Case Style ACT 4454FP Actual Size TX DATA OUT TX DATA IN DRIVER TX DATA IN ACTIVE FILTER OUTPUT STAGE TX DATA OUT TX INHIBIT +5 V RX DATA OUT REFERENCE COMP. ACTIVE FILTER COMP. +5V RTN RX DATA IN RX DATA IN INPUT AMPLIFIER RX DATA OUT 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: STROBE Block Diagram (without Transformer) The Transmitter section accepts bi-phase TTL data at the input and eroflex Circuit Technology – Data Bus Modules For The Future © SCD4454 REV A 3/17/99 when coupled to the data bus with a 1:2.5 ratio transformer, isolated on the data bus side with two 52.5 Ohm fault isolation resistors, and loaded by two 70 Ohm terminations, the data bus signal is typically 7.0 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 Figure 1 — Transmitter Logic Waveforms Idealized* 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 2 — Receiver Logic Waveforms Idealized* LINE TO LINE INPUT STROBE DATA OUT DATA OUT Note overlap * See Figure 7 For Actual Waveforms Aeroflex Circuit Technology 2 SCD4454 REV A 3/17/99 Plainview NY (516) 694-6700 Absolute Maximum Ratings Operating case temperature -55°C to +125°C Storage case temperature -65°C to +150°C Power supply voltage -0.3 V to +7.0 V Logic input voltage -0.3 V to +5.5 V Receiver differential input ±10 V Receiver input voltage (common mode) ±5 V Driver peak output current 800 mA Total package power dissipation over the full operating case temperature rise 2 Watts (Note: Normal operation conditions require one transceiver on and the other off.) 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 "0" Input Current VIN = 0.4 V "1" Input Current VIN = 2.7 V Typ Max Unit IILD -0.2 -0.4 mA IIHD 1 40 µA 0.7 V "0" Input Voltage VILD "1" Input Voltage VIHD Min 2.0 V Inhibit Characteristics "0" Input Current V IN=0.4V "1" Input Current VIN=2.7V IILI IIHI "0" Input Voltage VILI "1" Input Voltage VIHI mA -0.2 -0.4 1.0 40 µA 0.7 V V 2.0 Delay from TX inhibit, (0→1) to inhibited output tDXOFF 250 450 nS Delay from TX inhibit, (1→0) to active output tDXON 150 450 nS Differential output noise, inhibit mode VNOI 2 10 mVP-P Differential output impedance (inhibited) Note 1 ZOI Ω 2K Output Characteristics Differential output level RL=35 Ω Rise and fall times(10% to 90% of P-P output) Output offset at point A-A' on Figure 5, 2.5µS after midpoint crossing of the parity bit of the last word of a 660µS message VO tr RL=35 Ω Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential signal 6.3 7.0 200 250 VOS tDTX 290 7.7 VP-P 300 nS ± 90 mV peak 400 nS Note 1. Power on or off, measured from 75KHz to 1MHz at point A-A' and transformer self impedance of 3KΩ minimum Aeroflex Circuit Technology 3 SCD4454 REV A 3/17/99 Plainview NY (516) 694-6700 Electrical Characteristics — Receiver Section Parameter Differential Receiver Input Voltage Range (See Figure 5, point P–P') Common Mode Rejection Ratio (Note 3) Condition Symbol TXFMR 2.5:1 VIDR CMRR Min Typ Max Unit 14 20 VP-P 45 dB Strobe Characteristics (Logic "O" 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 0.7 V "0" Input Voltage VIL "1" Input Voltage VIH Strobe Delay (Turn-on or Turn-off) tSD V 2.0 50 100 nS 1.10 V P-P Threshold Characteristics (Sinewave Input) Input Threshold Voltage (referred to the bus) 100KHz–1MHz VTH 0.60 0.82 2.5 3.7 Output Characteristics – RX DATA and RX DATA "1" State IOH = -0.4 mA VOH "0" State IOL = -4.0 mA VOL 0.35 0.5 V tDRX 340 500 nS 13 30 170 200 50% duty cycle 320 400 100% duty cycle 700 800 +5.00 +5.50 Delay, (average) from Differential Input Zero Crossings to RX DATA and RX DATA Output 50% points V Power Data Power Supply Currents – Per Channel Transmitter Standby 25% duty cycle Note 4 mA ICC Power Supply Voltage VCC Operating Power Supply Voltage Range +4.75 V Note 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. Note 3: When measured at point A-A’ with ± 10 Volt peak, line to ground, DC to 2MHz Note 4: Typical power is measured with Vbus at point A-A’ = 7.0 VP-P Aeroflex Circuit Technology 4 SCD4454 REV A 3/17/99 Plainview NY (516) 694-6700 Figure 3 – Transmitter (TX) Output Wave Form Figure 4 – Transmitter (TX) Output Offset 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* * Rise and fall times measured at point A-A' in Figure 5 *Offset measured at point A-A' in Figure 5 Figure 5 – Typical Direct Transformer Connection Figure 6 – Power Dissipation vs. Duty Cycle (Total hybrid with one channel transmitting and the other not powered) 70Ω 70Ω 2000 N1:N2 TX DATA OUT P B A Center Tap TX DATA OUT P' POWER DISSIPATION MILLIWATTS 1800 52.5Ω N1:N3 for Stub Coupling A' B' 52.5Ω Maximum 1600 1400 1200 Typical 1000 800 RX DATA IN 600 RX DATA IN 400 200 Transformer turns ratios: N1:N2 = 1:2.5 N1:N3 = 1:1.77 Use Technitrol 1553-45 or equivalent Aeroflex Circuit Technology 0 0 10 20 30 40 50 60 70 80 90 100 DUTY CYCLE – PERCENT Note: Vcc = 5V, Transformer ratio 1:2.5, Vbus (pt A-A') at 7.0 Volts P-P 5 SCD4454 REV A 3/17/99 Plainview NY (516) 694-6700 Figure 7 ACTUAL HYBRID WAVEFORMS* — 25°C TYPICAL S TA RT O F W O R D – 3 3 W OR D TR A N S M I SS I O N TX DATA IN CH 1 BUS OUT Point A–A' See Figure 5 CH 2 RX DATA OUT CH 3 RX DATA OUT CH 4 E N D OF W O R D – 3 3 W O R D TR A N S M I S SI O N TX DATA IN CH 1 BUS OUT Point A–A' See Figure 5 CH 2 RX DATA OUT CH 3 RX DATA OUT CH 4 DS 40 ihP Aeroflex Circuit Technology b 6139A 6 SCD4454 REV A 3/17/99 Plainview NY (516) 694-6700 Figure 8 – Pin Numbers & Functions ACT4454/4460 Pin # Aeroflex Circuit Technology 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 7 SCD4454 REV A 3/17/99 Plainview NY (516) 694-6700 CIRCUIT TECHNOLOGY Configurations and Ordering Information Model No. 1/ DESC No. 2/ Receiver Data level Case Configuration ACT 4454 5962-920610HZX Normally High Rx Flat Package Dual ACT 4460 5962-92061HZX Normally Low Rx Flat Package Dual 1/ Consult Factory for different temperature ranges and commercial quality levels. 2/ For space product assurance level substitute K for H. For solder dip substitute A for X. For gold plated leads substitute C for X. Model ACT4454/4460 Flat Package PIN 1 0.596 MAX 0.808 MAX 0.050 ± 0.005 0.550 11 Equal Spaces at 0.050 Noncumulative 0.018 MAX 0.010 ± 0.003 0.410 MIN 0.095 MAX 0.056 MAX Notes 1. Dimensions shown are in inches 2. Pins are equally spaced at 0.100±0.002 tolerance, non-cumulative, each row Aeroflex Circuit Technology 35 South Service Road Plainview New York 11803 Telephone: (516) 694-6700 FAX: (516) 694-6715 Toll Free Inquiries: 1-(800) THE-1553 Specifications subject to change without notice. Aeroflex Circuit Technology 8 SCD4454 REV A 3/17/99 Plainview NY (516) 694-6700