ACT 4436 DUAL TRANSCEIVER FOR MIL-STD-1553/1760 Features CIRCUIT TECHNOLOGY ★ Smaller Case Outline than ACT4487D www.aeroflex.com/act1.htm General Description • +5 / ±15 Volt Supply Operation • Low Power Dissipation • Outstanding MIL-STD-1553 performance • Radiation Hard Dielectric Isolation Monolithic Construction for Severe Environments • Input and Output TTL Compatible Design • Processed and Screened to MIL-STD-883 Specs • MIL-PRF-38534 Compliant Devices Available • DESC SMD# 5962-89447 TX DATA OUT TX DATA IN DRIVER TX DATA IN ACTIVE FILTER OUTPUT STAGE TX DATA OUT TX INHIBIT IN +5V (VL) +15V (VCC) -15V (VEE) RX DATA OUT REFERENCE COMP. ACTIVE FILTER COMP. GND1 GND2 GND3 RX DATA IN RX DATA IN INPUT AMPLIFIER RX DATA OUT CASE RX STROBE IN Block Diagram (Without Transformer) The Aeroflex Circuit Technology ACT 4436 is a next generation monolithic transceiver design which provides full compliance to MIL-STD-1553A/B and 1760 requirements in a smaller package with lower pin count then the ACT4487D, for those designs with less board space. The ACT 4436 series performs the front-end analog function of inputting and outputting data through a transformer to the MIL-STD-1553 data bus. Design of this transceiver 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, 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 7.5 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, eroflex Circuit Technology – Data Bus Modules For The Future © SCD4436D REV B 3/10/98 an overriding “INHIBIT" input provides for the removal of the transmitter output from the line. A logic “1” signal 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) 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, point A Figure 5, 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 RX 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 (ACT4436D) LINE TO LINE INPUT STROBE DATA OUT DATA OUT Note overlap Aeroflex Circuit Technology 2 SCD4436D REV B 3/10/98/98 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 VCC VEE VL -0.3 V to +18 V +0.3 V to-18 V -0.3 V to +7.0 V Logic input voltage -0.3 V to +5.5 V ±40 VP-P Receiver differential input Receiver input voltage (common mode) ±10 V Driver peak output current 300 mA Total package power dissipation over the full operating case temperature rise 2.5 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 4°C/W Electrical Characteristics — Driver Section I nput Characteristics, TX DATA IN or TX DATA IN (Notes 2 & 3 apply) Parameter Condition "0" Input Current VIN = 0.4 V "1" Input Current VIN = 2.7 V Symbol Typ Max Unit IILD -0.1 -0.2 mA IIHD 1 40 µA 0.7 V "0" Input Voltage VIHD "1" Input Voltage VIHD Min 2.0 V Inhibit Characteristics "0" Input Current "1" Input Current VIN = 0.4 V IILI -0.1 -0.2 VIN=2.7V IIHI 1.0 40 "0" Input Voltage VILI "1" Input Voltage VIHI Delay from TX inhibit, (0→1) to inhibited output Delay from TX inhibit, (1→0) to active output From mid pt inhibit to ±1.2V pt B, See Figure 5 Differential output noise, inhibit mode Differential output impedance (inhibited) Note 1 See Figure 5 0.7 mA µA V V 2.0 tDXOFF 175 225 tDXON 90 150 VNOI 2 10 nS nS mVP-P Point B ZOI 2K Ω Point C ZOI 1K Ω Point A VO 6 7.5 9 Point A tr 100 160 200 nS Point A VOS ± 90 mV peak Point A tDXT 200 nS Output Characteristics Differential output level, See Figure 5 Rise and fall times(10% to 90% at pt A output) See Figure 5 Output offset, Figure 3, 2.5µS after midpoint crossing of the parity bit of the last word of a 660µS message See Figure 5 Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential signal. See Fig 5 Aeroflex Circuit Technology 3 100 VP-P SCD4436D REV B 3/10/98/98 Plainview NY (516) 694-6700 Electrical Characteristics — Receiver Section Parameter Differential Receiver Input Voltage Range (See Figure 5, Point B) Condition Symbol TXFMR 1.4:1 VIDR Common Mode Rejection Ratio (Note 3) CMRR Min Typ Max Unit 40 VP-P 45 dB "1" State – Rx Data or Rx Data Output IOH = -0.4 mA VOH "0" State – Rx Data or Rx Data Output IOI = 4 mA VOL 0.35 0.5 V tDXT 270 400 nS 0.75 1.15 VP-P 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 VTH 2.5 0.60 3.7 V Strobe Characteristics (Logic "0" Inhibits Output) "0" Input Current VS=0.4V IIL -0.1 "1" Input Current VS=2.7V IIH 1 -0.2 mA +40 µA 0.7 V "0" Input Voltage VIL "1" Input Voltage VIH Strobe Delay (Turn-on or Turn-off) tSD 50 100 ICC IEE IL ICC IEE IL ICC IEE IL ICC IEE IL 0 12 18 1 16 30 45 12 18 90 12 18 180 12 18 50 20 30 100 20 30 200 20 30 ±15V Operating Power Supply Voltage Range VCC VEE +14.25 +15.00 +15.75 -14.25 -15.00 -15.75 V +5V Operating Power Supply Voltage Range) VL +4.50 V V 2.0 nS Power Data Power Supply Currents – Per Channel – See Figure 4 Transmitter Standby 25% duty cycle 50% duty cycle 100% duty cycle mA Power Supply Voltages +5.00 +5.50 Note 1. Power on or off, measured from 75KHz to 1MHz at point A and transformer self impedance of 3KΩ minimum at 1MHz. Note 2: Power Supplies: ±15 Volts ±0.75 V & +5 Volts ±0.5 V, bypassed 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. Note 3: When measured as shown per Figure 5 with ± 10 Volt peak, line to ground, DC to 2MHz Note 4: Typical power is measured with VBUS at point A = 7.5 VP-P Aeroflex Circuit Technology 4 SCD4436D REV B 3/10/98/98 Plainview NY (516) 694-6700 Figure 3 – Transmitter (TX) Output Offset Figure 5 – Typical 1553 Bus Connections LAST BIT Transformer Coupled Stub 70Ω Magnified View ACT 4436 OUTPUT OFFSET * OUTPUT OFFSET * TX DATA OUT 0 Volts 1:1.4 52.5Ω 2:1 3 7 2 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 Direct Coupled Stub Figure 4 – Hybrid Power Dissipation vs. Duty Cycle (Total hybrid with one channel transmitting and the other not powered – 100% Duty Cycle) ACT 4436 TX DATA OUT 3600 2 3200 52.5Ω 1.4:1 3 8 B A POWER DISSIPATION MILLIWATTS 2.97W 0.270 2800 TX DATA OUT Typical Hybrid Input Power 2400 1 4 T1553-2 RX DATA IN 2000 52.5Ω Zoi 1.87W 70Ω RX DATA IN 1600 1200 800 Typical Hybrid Dissipation 400 0 0 10 20 30 40 50 60 70 80 Transformer Model use Technitrol Part# 1553-2 or equivalent 90 100 DUTY CYCLE – PERCENT Note: Vcc= +15V, VEE = -15V, VL= +5V, Transformer ratio 1.4:1, VBUS (point A) at 7.5VP-P. Configurations and Ordering Information ACT Model # / Ordering Part # Case Style DESC Number Rx Standby ACT 4436-D Plug In 5962-TBA Normally Low ACT 4436-DI Plug In 5962-8944708HUX Normally High ACT 4436-DF Flat Package 5962-TBA Normally Low ACT 4436-DFI Flat Package 5962-8944708HZX Normally High Specifications subject to change without notice. Aeroflex Circuit Technology 5 SCD4436D REV B 3/10/98/98 Plainview NY (516) 694-6700 Figure 6 – Lead Numbers & Functions ACT4436D – Plug In and Flat Package Aeroflex Circuit Technology Pin # Function Channel 1 TX DATA OUT/ RX DATA IN A 2 TX DATA OUT/ RX DATA IN A 3 GROUND A 4 RX STROBE A 5 RX DATA OUT A 6 RX DATA OUT A 7 CASE A 8 TX DATA OUT/ RX DATA IN B 9 TX DATA OUT/ RX DATA IN B 10 GROUND B 11 RX STROBE B 12 RX DATA OUT B 13 RX DATA OUT B 14 NC B 15 GROUND B 16 -V B 17 VL B 18 TX INHIBIT B 19 TX DATA IN B 20 TX DATA IN B 21 +V B 22 GROUND A 23 -V A 24 VL A 25 TX INHIBIT A 26 TX DATA IN A 27 TX DATA IN A 28 +V A 6 SCD4436D REV B 3/10/98/98 Plainview NY (516) 694-6700 CIRCUIT TECHNOLOGY Plug In Package Outline 1.480 MAX. 28 15 0.780 MAX. 0.600 Pin 1 & ESD Designator 14 0.210 MAX. .250 .018 .100 1.300 (13 Equal Spaces at .100) Flat Package Outline .180 MAX. .072 1.500 MAX. .015 28 15 0.780 MAX. Lead 1 & ESD Designator 14 .400 MIN. .100 .010 1.300 (13 Equal Spaces at .100) Telephone: (516) 694-6700 FAX: (516) 694-6715 Toll Free Inquiries: (800) THE-1553 E-Mail: [email protected] Aeroflex Circuit Technology 35 South Service Road Plainview New York 11830 www.aeroflex.com/act1.htm Aeroflex Circuit Technology 7 SCD4436D REV B 3/10/98 Plainview NY (516) 694-6700