Standard Products ACT4487 Dual Transceiver for MIL-STD-1553A/B, MIL-STD-1760 & SAE-AS15531 www.aeroflex.com/Avionics August 10, 2005 FEATURES ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Small size, light weight and low power dissipation dual transceiver +5V / ±15V DC power supply operation Outstanding MIL-STD-1553 / SAE-AS15531 performance Monolithic construction Input and output TTL compatible design Designed for commercial, industrial and aerospace applications MIL-PRF-38534 compliant devices available Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer DSCC Standard Microcircuit Drawing (SMD): 5962–87579 & 5962-89447 GENERAL DESCRIPTION The Aeroflex-Plainview ACT4487 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 the smallest package with lower pin count for those designs with less board space. 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 1.4:1 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 Strobe input inhibits the DATA and DATA outputs. If unused, a 2K pull-up to +5 Volts is recommended. SCD4487D Rev D 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 CASE 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 Note: Outputs shown are for ACT4487D and are Inverted for the ACT4487DI. FIGURE 2 – RECEIVER LOGIC WAVEFORMS IDEALIZED SCD4487D Rev D 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 (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 4°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 -0.2 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 100 200 300 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) SCD4487D Rev D 3 ELECTRICAL CHARACTERISTICS – RECEIVER SECTION Parameter Differential Voltage Range (See Figure 5, Point B) Condition Symbol Min Typ Max Unit TXFMR 1.4:1 VIDR - 14 20 Vpk CMRR 45 - - dB Common Mode Rejection Ratio (Note 3) "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 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 - -0.1 -0.2 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 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 ±10Vp, line to ground, DC to 2MHz. 4. Typical power is measured with Vbus at Point A = 7.5 Vp-p. SCD4487D Rev D 4 LAST BIT Magnified View * OUTPUT OFFSET 0 Volts Transformer Coupled Stub * 70Ω OUTPUT OFFSET ACT4487D TX DATA OUT 2.5 µsec 1:1.4 52.5Ω 2:1 3 7 2 *Offset measured at Point A in Figure 5 TX DATA OUT C A 1 5 T1553-2 52.5Ω RX DATA IN FIGURE 3 – TRANSMITTER (TX) OUTPUT OFFSET Zoi VCM RX DATA IN Direct Coupled Stub ACT4487D TX DATA OUT 2 3600 TX DATA OUT 3200 POWER DISSIPATION MILLIWATTS 2.97W 0.270 RX DATA IN 2800 2400 Typical Hybrid Input Power 52.5Ω 1.4:1 3 8 B 4 1 T1553-2 A 52.5Ω Zoi RX DATA IN 2000 1.87W 1600 Transformer Model use Technitrol Part# 1553-2 or equivalent 1200 800 Typical Hybrid Dissipation 400 0 0 10 20 30 40 50 60 70 80 FIGURE 5 – TYPICAL 1553 BUS CONNECTIONS 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 (Total, hybrid with one channel transmitting and the other not powered – 100% Duty Cycle) SCD4487D Rev D 5 70Ω PACKAGE PINS & FUNCTIONS PACKAGE CONFIGURATION OUTLINE Pin # PLUG-IN PACKAGE 1.90 MAX 0.085 1.70 .097 19 36 0.78 MAX 0.600 18 Pin 1 & ESD Designator 0.24 MIN 0.018 DIA. ±0.002 FLAT PACKAGE 0.78 MAX 19 18 0.015 ±0.002 1.90 MAX 0.10 Typ 36 0.097 0.086 R 4 Places 0.175 MAX Pin 1 & ESD Designator 0.010 ±0.002 0.40 MIN 2 SIDES 0.065 REF Notes 1. Dimensions shown are in inches 2. Pins are equally spaced at 0.100±0.002 tolerance, non-cumulative, each row SCD4487D Rev D 6 Function Channel 1 TX DATA OUT A 2 TX DATA OUT A 3 GROUND A 4 NC 5 RX DATA OUT A 6 STROBE A 7 GROUND A 8 RX DATA OUT A 9 CASE 10 TX DATA OUT B 11 TX DATA OUT B 12 GROUND B 13 NC 14 RX DATA OUT B 15 STROBE B 16 GROUND B 17 RX DATA OUT B 18 NC 19 VCC B 20 RX DATA IN B 21 RX DATA IN B 22 GROUND B 23 VEE B 24 +5V B 25 INHIBIT B 26 TX DATA IN B 27 TX DATA IN B 28 VCC A 29 RX DATA IN A 30 RX DATA IN A 31 GROUND A 32 VEE A 33 +5 V A 34 INHIBIT A 35 TX DATA IN A 36 TX DATA IN A CONFIGURATIONS AND ORDERING INFORMATION Model No. DSCC No. Receiver Data level ACT 4487-D 5962-8757910X_ Normally Low ACT 4487-DI 5962-8944708HU_ Normally High ACT 4487-DF 5962-8757910Y_ Normally Low ACT 4487-DFI 5962-8944708HZ_ Normally High 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 Case Plug In Configuration Dual Flat Package [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. Our passion for performance is defined by three attributes represented by these three icons: solution-minded, performance-driven and customer-focused SCD4487D Rev D 7