Standard Products ACT4489 Single Transceiver for MIL-STD-1553A/B, MIL-STD-1760 & SAE-AS15531 www.aeroflex.com/Avionics May 16, 2005 FEATURES ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ Small size, light weight and low power dissipation single transceiver Bipolar supply ±12V, logic supply +5V 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 DESCRIPTION The Aeroflex-Plainview ACT4489 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 a small package with low power consumption. 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. TRANSMITTER The transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1:1 ratio transformer the data bus signal is typically 7.0 VP-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 VP-P and reject signals less than 0.6 VP-P when used with a transformer (See Figure 5 for transformer data and typical connections). A low level at the RX STROBE IN input inhibits the DATA and DATA outputs. SCD4489 Rev B 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) +12 V (+Vcc) -12 V (-VEE) GND1-3 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 FIGURE 2 – RECEIVER LOGIC WAVEFORMS IDEALIZED SCD4489 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 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 300 mA Total package power dissipation over the full operating case temperature range 2.5 Watts Maximum junction to case temperature 10°C Thermal resistance – Junction to case 4°C/W ELECTRICAL CHARACTERISTICS – DRIVER SECTION (Note 2) INPUT CHARACTERISTICS, TX DATA IN OR TX DATA IN Parameter Conditions Symbol Min Typ Max Unit "0" Input Current VIN = 0.4V IILD - -0.1 -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 - 175 225 nS Delay from TX inhibit, (1➝0) to active output tDXON - 90 150 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 9 V P- P tR & tF 100 160 300 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) SCD4489 Rev B 3 ELECTRICAL CHARACTERISTICS – RECEIVER SECTION (Note 2) Parameter Differential Voltage Range (See Figure 5, Point B) Conditions Symbol Min Typ Max Unit TXFMR 1:1 VIDR - - 40 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 (Note 2) POWER SUPPLY CURRENTS – PER CHANNEL – SEE FIGURE 4 Transmitter Standby Note 4 ICC IEE IL - 0 12 18 1 16 30 25% Duty Cycle ICC IEE IL - 58 12 18 63 20 30 50% Duty Cycle ICC IEE IL - 115 12 18 125 20 30 100% Duty Cycle ICC IEE IL - 230 12 18 250 20 30 mA POWER SUPPLY VOLTAGE ±12V Operating Power Supply Voltage Range VCC VEE +11.40 -11.40 +12.00 +12.60 -12.00 -12.60 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: +12VDC ±0.60V & +5VDC ±0.5V, 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. 3. When measured as shown per Figure 5 with ± 10VPK, line to ground, DC to 2MHz 4. Typical power is measured with VBUS at point A = 7.0VP-P SCD4489 Rev B 4 LAST BIT Magnified View OUTPUT OFFSET * OUTPUT OFFSET * 0 Volts Transformer Coupled Stub 2.5 µsec 70Ω ACT4489D TX DATA OUT *Offset measured at Point A in Figure 5 2 FIGURE 3 – TRANSMITTER (TX) OUTPUT OFFSET TX DATA OUT 1:1.4 52.5Ω 1:0.707 7 3 C A 1 5 T1553-1 52.5Ω RX DATA IN Zoi VCM RX DATA IN Direct Coupled Stub ACT4489D 3600 TX DATA OUT 3200 2 POWER DISSIPATION MILLIWATTS 3.0W 0.270W 2800 2400 Typical Hybrid Input Power TX DATA OUT 2000 1.9W RX DATA IN 1600 B A 4 1 T1553-1 55Ω Zoi RX DATA IN 1200 800 Typical Hybrid Dissipation 400 0 0 55Ω 1:1 3 8 10 20 30 40 50 60 70 80 Transformer Model use Technitrol Part# 1553-1 or equivalent 90 100 FIGURE 5 – TYPICAL 1553 BUS CONNECTIONS DUTY CYCLE – PERCENT Note: Vcc = +12VDC, VEE = -12VDC, VL = +5VDC, Transformer ratio 1:1, VBUS (Point A) at 7.0VP-P. FIGURE 4 – POWER DISSIPATION VS. DUTY CYCLE SCD4489 Rev B 5 70Ω PIN NUMBERS & FUNCTIONS Pin # Function Pin # Function 1 TX DATA OUT 13 VCC 2 TX DATA OUT 14 NC 3 GROUND 15 RX DATA IN 4 NC 16 RX DATA IN 5 NC 17 NC 6 NC 18 CASE 7 RX DATA OUT 19 VEE 8 STROBE 20 VL 9 GROUND 21 TX INHIBIT 10 RX DATA OUT 22 TX DATA IN 11 NC 23 TX DATA IN 12 NC 24 NC PACKAGE CONFIGURATION OUTLINES Plug In Package Outline 1.385 MAX. 24 13 0.805 MAX. 0.600 Pin 1 & ESD Designator 12 0.200 MAX. .240 MIN. .015 .018 .100 1.100 (11 Equal Spaces at .100) Flat Package Outline .200 MAX. .065 1.315 MAX. .015 24 13 0.735 MAX. Lead 1 & ESD Designator 12 .375 MIN. .100 .010 1.100 (11 Equal Spaces at .100) SCD4489 Rev B 6 CONFIGURATIONS AND ORDERING INFORMATION Model No. Receiver Data level ACT 4489 Normally Low ACT 4489-I Normally High ACT 4489-F Normally Low ACT 4489-FI 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 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 SCD4489 Rev B 7