ACT4808 Dual Transceivers for MACAIR A3818, A5690, A5232, A4905 & MIL-STD-1553 Features • ACT4808 Dual Transceiver meets MIL-STD-1553A & B, Macair A3818, A5690, A5232 and A4905 specs • New Low Power Model –L Available • Operates with ±12V to ±15V & +5V Power Supplies • Voltage source output for higher bus drive power • Plug-in or Flat Package • Monolithic construction using linear ASICs • Processed and Screened to MIL-STD-883 specs ACT4808 Transceiver TX DATA OUT TX DATA IN DRIVER OUTPUT STAGE SHAPING TX DATA IN TX DATA OUT V+ TX INHIBIT COMP. V- +5 V VEE RX DATA IN RX DATA IN RX DATA OUT INPUT AMP ACTIVE FILTER COMP. RX DATA OUT V CC STROBE Block Diagram (without Transformer), 1/2 of unit shown CIRCUIT TECHNOLOGY www.aeroflex.com/act1.htm General Description: The Aeroflex Laboratories transceiver model ACT4808 is a new generation Dual monolithic transceiver which provides full compliance with Macair and MIL-STD-1553 data bus requirements The model ACT4808 performs the front-end analog function of inputting and outputting data through a transformer to a MIL-STD-1553 or Macair data bus. The ACT4808 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. 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. The ACT4808 series active filter design has additional high frequency roll-off to provide the required Macair low harmonic distortion waveform without increasing the pulse delay characteristics significantly. Efficient transmitter electrical and thermal design provides low internal power dissipation and heat rise at high and well as low duty cycles.The receiver input threshold is set Internally. Transmitter The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus as per Figure 3 or 4 and by two 70 Ohm terminations (ZO), the data bus signal produced is 6.5 Volts minimum P-P at A-A’. When both DATA and DATA eroflex Circuit Technology – Data Bus Modules For The Future © SCD4808 REV E 12/9/99 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 Waveforms, Figure 1.) The transmitter utilizes an active filter to suppress harmonics above 1 MHz to meet Macair specifications A-3818, A-4905, A-5232 and A-5690. The transmitter may be safely operated for an indefinite period at 100% duty cycle into a data bus short circuit (Pt. A-A’). 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 Waveforms, Figure 2.) The internal threshold is nominally set to detect data bus signals exceeding 1.10 Volts P-P and reject signals less than 0.6 Volts P-P when used with a 1:1 turns ratio transformer. (See Figure 4 for transformer data and typical connection.) A low level at the Strobe input inhibits the DATA and DATA outputs. Figure 1 – Transmitter Logic Waveforms DATA IN DATA IN INHIBIT LINE TO LINE OUTPUT NOTES: 1. Line to line waveforms illustrate Macair signals, MIL-STD-1553 signals are trapezoidal 2. DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them. 3. DATA and DATA must be in the same state during off time (both high or low). Figure 2 – Receiver Logic Waveforms LINE TO LINE INPUT DATA OUT DATA OUT Note overlap NOTE: Waveforms shown are for normally low devices. For normally high receiver output level devices, the receiver outputs are swapped as shown by the dashed lines Aeroflex Circuit Technology 2 SCD4808 REV E 12/9/99 Plainview NY (516) 694-6700 Absolute Maximum Ratings, Per Channel Operating Case Temperature -55°C to +125°C Storage Case Temperature -65°C to +150°C Power Supply Voltages ±16 V +7 V Logic Input Voltage -0.3 V to +5.5 V Receiver Differential Input ±40 V Receiver Input Voltage (Common Mode) ±10V Driver Peak Output Current 150 mA Total Package Power Dissipation over the Full Operating Case Temperature Range 3.6 Watts 18°C Maximum Junction to Case Temperature Junction-Case, Thermal Resistance 5°C/W Electrical Characteristics Per Channel, Transmitter Section 1/ 2/ Input Characteristics, TX DATA IN or TX DATA IN Parameter Condition Symbol Min Typ Max Unit "0" Input Current VIN = 0.4 V IILD - -0.2 -0.4 mA "1" Input Current VIN = 2.7 V IIHD - 1.0 40 µA "0" Input Voltage - VIHD - - 0.7 V "1" Input Voltage - VIHD 2.0 - - V "0" Input Current VIN = 0.4 V IILI -0.2 -0.4 mA "1" Input Current VIN = 2.7 V 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 - 300 450 nS Delay from TX inhibit, (1→0) to active output - tDXON - 300 450 nS Differential output noise, inhibit mode 3/ VNOI - 0.8 10 mVp-p Differential output impedance * 4/ ZOI 2K - - Ω VO 26 18 29 21 32 25 Vp-p Vp-p VOS - - ±360 ±250 mVpk mVpk 10% - 90% tR & tF 200 250 300 nS - tDTX 240 300 nS Inhibit Characteristics * See Aeroflex Application note# 113 for reference. Output Characteristics Pt. B - B’ ZO = 70Ω Differential output - Direct coupled stub Differential output - Transformer coupled stub (see Fig. 3 and 4) Differential output offset - Direct coupled stub Fig. 4 Differential output offset - Xformer coupled stub Fig. 3 5/ Differential output rise / fall times (see Fig. 5) Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential output. Aeroflex Circuit Technology 3 SCD4808 REV E 12/9/99 Plainview NY (516) 694-6700 Electrical Characteristics Per Channel, Receiver Section 1/ 2/ Parameter Condition Symbol Min Typ Max Unit f = 1MHz ZIN 10K - - Ω Differential Input Voltage Range - VIDR - - 40 Vp-p Input Common Mode Voltage Range - VICR 10 - - Vp-p Common Mode Rejection Ratio - CMRR 40 - - dB Differential Input Impedance Strobe Characteristics (Logic "0" Inhibits Output) "0" Input Current VS = 0.4 V IIL - -0.2 -0.4 mA "1" Input Current VS = 2.7 V IIH - 1.0 +40 µA "0" Input Voltage - VIL - - 0.7 V "1" Input Voltage - VIH 2.0 - - V Strobe Delay (Turn-on or Turn-off) - tSD - - 150 nS VTH 0.60 0.80 1.10 Vp-p Threshold Characteristics (Sinewave Input ) Internal Threshold Voltage Fig. 4 Pt. B - B’ 1MHz Output Characteristics, RX DATA and RX DATA "1" State IOH = -0.4 mA VOH 2.5 3.6 - V "0" State IOL = 4 mA VOL - 0.35 0.5 V Receiver Output Skew 6/ tRXSK - - 10 nS Delay (average), from differential input zero crossings to RX DATA and RX DATA output 50% points 7/ tDRX - 300 450 nS Power Supply Currents Per Channel 1/ 2/ VCC = +12V to +15V, VEE = -12V to -15V, VL = +5V Std Version -L Version Typ Max Typ Max ICC IEE IL 30 50 25 60 75 35 5 25 18 10 35 30 ICC IEE IL 50 70 25 85 105 35 20 40 18 30 60 30 50% ICC IEE IL 75 45 25 110 130 35 40 60 18 60 80 30 100% ICC IEE IL 120 140 25 160 180 35 85 105 18 120 140 30 Duty Cycle Transmitter Standby 25% Aeroflex Circuit Technology Condition Symbol Pt. B - B’ ZO = 70 Ω, VO = 29 VPK-PK Bit Pattern = FFFFHEX Fig. 4 4 Unit SCD4808 REV E 12/9/99 mA Plainview NY (516) 694-6700 Typical Hybrid Power Dissipation*, Per Channel Std Version Power Supply Conditions PSC1 VCC = +15V VEE = -15V VL = +5V PSC2 VCC = +15V VEE = -12V VL = +5V Standby 100% Duty Cycle Standby 100% Duty Cycle 1.325 3.250 0.540 2.167 1.118 3.142 0.465 1.852 1.085 2.472 0.450 1.600 Condition Pt. B - B’ ZO = 70 Ω, VO = 29 VPK-PK Bit Pattern = FFFFHEX Fig. 4 PSC3 VCC = +12V VEE = -12V VL = +5V -L Version Unit Watts * See Aeroflex Application note# 112 for reference. Recommended Power Supply Voltage Range +V +11.4 Volts to +15.75 Volts -V -11.4 Volts to -15.75 Volts Logic +4.5 Volts to +5.5 Volts Notes: 1. VCC = +15Volts ±0.75V, VEE = -15Volts ±0.75V, VIL = +5Volts ±0.5V, TC = -55°C to +125°C, unless otherwise specified. 2. All typical values are measured at +25°C. 3. Characteristics guaranteed by design, not production tested. 4. Power ON/OFF, measured from 75KHz to 1MHz at Point A-A’ Figure 4, in accordance with MIL-STD-1553B paragraph 4.5.2.2.2.3. 5. At point A-A’ on Figure 3 or 4, 2.5 µS after midpoint crossing of the parity bit of the last word of a 660 µS message. 6. Receiver skew is defined as the time from the rising edge of RX DATA OUT to the rising edge of RX DATA OUT minus 500 nS, with a sine wave input of 3 VPK-PK at 1MHz driven into Pt. B-B’ of Figure 4 or 2.1 VPK-PK at 1MHz driven into Pt. B-B’ of Figure 3. The specification maximum is guaranteed for TA = 25°C only. Standard TTL loads applied to RX DATA Outputs. 7. This test is peformed while the Transceiver is reading its own transmission. This condition is called "Wraparound". Standard TTL loads applied to RX DATA Outputs. Aeroflex Circuit Technology 5 SCD4808 REV E 12/9/99 Plainview NY (516) 694-6700 Terminal TRANSCEIVER UNDER TEST Zo TX DATA OUT RX DATA IN Isolation Transformer Coupling Transformer 1:N 1 : 1.414 R B A RX DATA OUT Data Bus Wire Pair Isolation Resistors R = 0.75 ZO RX DATA OUT R B' A' TX DATA OUT RX DATA IN Zo Terminal Input Impedance B – B' MIL-STD-1553B para 4.5.2.1.2.3 1KΩ minimum. 75KHz – 1MHz Transformer turns ratio: N = 0.707 Recommend Technitrol 1553-1 Figure 3 – Databus Interface Using Transformer Coupling (Figure 9, MIL-STD-1553B) Terminal TRANSCEIVER UNDER TEST TX DATA OUT RX DATA IN Zo Isolation Transformer 55Ω 1:N B A Data Bus Wire Pair RX DATA OUT RX DATA OUT 55Ω B' A' TX DATA OUT RX DATA IN Zo Transformer turns ratio: N=1 Recommend Technitrol 1553-1 Terminal Input Impedance B – B' MIL-STD-1553B para 4.5.2.2.2.3 2KΩ minimum. 75KHz – 1MHz Figure 4 – Databus Interface Using Direct Coupling (Figure 10, MIL-STD-1553B) Aeroflex Circuit Technology 6 SCD4808 REV E 12/9/99 Plainview NY (516) 694-6700 Figure 5 – Transmitter (TX) Output Wave form Figure 6 – Transmitter (TX) Output offset LAST BIT tf* 90% Magnified View 6.5V P-P MIN 8.0V P-P MAX 0 Volts OUTPUT OFFSET * OUTPUT OFFSET * 0 Volts 10% 2.5 µsec tr* *Offset measured at point A-A’ in Figure 3 or 4 * Rise and fall times measured at point A-A’ in Figure 3 or 4 Figure 8 – Typical Hybrid Power Dissipation vs. Duty Cycle (Per Channel) -L Version 4.0 4.0 3.6 3.6 3.2 3.2 2.8 2.8 2.4 POWER DISSIPATION WATTS POWER DISSIPATION WATTS Figure 7 – Typical Hybrid Power Dissipation vs. Duty Cycle (Per Channel) PSC 2 2.0 PSC 1 1.6 PSC 3 1.2 0.8 0.4 0 0 2.4 2.0 PSC 1 PSC 2 1.6 PSC 3 1.2 0.8 0.4 10 20 30 40 50 60 70 80 0 0 90 100 DUTY CYCLE, PERCENT 10 20 30 40 50 60 70 80 90 100 DUTY CYCLE, PERCENT Configurations and Ordering Information Model Number’s. DESC No. Receiver Data level Case ACT4808D ACT4808LD TBA Normally Low Plug In ACT4808DF ACT4808LDF TBA Normally Low Flat Pack ACT4808DI ACT4808LDI TBA Normally High Plug In ACT4808DFI ACT4808LDFI TBA Normally High Flat Pack Aeroflex Circuit Technology 7 SCD4808 REV E 12/9/99 Plainview NY (516) 694-6700 CIRCUIT TECHNOLOGY Dual In Line Pin Numbers & Functions 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 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 Flat Package 14 RX DATA OUT B 0.78 MAX 15 STROBE B 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 Specifications subject to change without notice. Aeroflex Circuit Technology 35 South Service Road Plainview New York 11803 Aeroflex Circuit Technology Pin # 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 3 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 Telephone: (516) 694-6700 FAX: (516) 694-6715 Toll Free Inquiries: 1-(800) THE-1553 8 SCD4808 REV E 12/9/99 Plainview NY (516) 694-6700