Standard Products ACT4418N Variable Amplitude Transceiver for MACAIR (A3818, A4905, A5232, A5690), MIL-STD-1553 & SAE-AS15531 www.aeroflex.com/Avionics March 4, 2005 FEATURES ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ACT4418 Transceiver meets Macair (A3818, A4905, A5232 and A5690) & MIL-STD-1553A/B Bipolar supply ±15V to ±12V, logic supply +5V Variable TX amplitude Monolithic construction Voltage source output for higher bus drive power Variable receiver threshold capability Designed for commercial, industrial and aerospace applications MIL-PRF-38534 compliant devices available Aeroflex-Plainview is a Class H & K MIL-PRF-38534 manufacturer GENERAL DESCRIPTION The Aeroflex-Plainview transceiver model ACT4418N is a new generation monolithic transceiver which provide full compliance with Macair and MIL-STD-1553 data bus while providing variable amplitude control. The device performs the front-end analog function of inputting and outputting data through a transformer to a Macair data bus. The ACT4418N 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 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. The ACT4418N 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. An optional receiver input threshold adjustment can be accomplished by the use of the ''External Threshold" terminals. Variable amplitude is adjusted with 0–10 VDC on the control pin. An optional receiver input threshold adjustment can be accomplished by the use of the "Set Internal Threshold" terminals. TRANSMITTER The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1:1 transformer the data bus signal produced is 7.0 Volts typical P-P at point A-A’ (See Figure 3 or 4). 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 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. The transceiver utilizes an active filter to suppress harmonics above 1MHz. The Transmitter may be safely operated at 100% duty cycle for an indefinite period into a short circuited 1553 bus. 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 1.05 Vp-p and reject signals less than 0.6 Vp-p when used with a 1:1 turns ratio transformer (See Figure 3 or 4 for transformer data and typical connection). This threshold setting can be held by grounding the appropriate pins or modified with the use of external resistors. A low level at the ''STROBE'' input inhibits the DATA and DATA outputs. If unused, a 2K Ohm pull-up to +5VDC is recommended. SCD4418N Rev A TX DATA OUT TX DATA IN DRIVER OUTPUT STAGE SHAPING TX DATA IN TX INHIBIT AMP CONTROL V+ GND CASE GND EXT THRESHOLD DATA DATA SET INTERNAL THRESHOLD COMP. DATA EXT. THRESHOLD DATA +5V -12V or -15V RX DATA IN RX DATA IN TX DATA OUT RX DATA OUT V- ACTIVE FILTER INPUT AMP COMP. RX DATA OUT +12V or +15V STROBE BLOCK DIAGRAM (WITHOUT TRANSFORMER 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 1 – TRANSMITTER LOGIC WAVEFORMS IDEALIZED 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 FIGURE 2 – RECEIVER LOGIC WAVEFORMS IDEALIZED SCD4418N Rev A 2 ABSOLUTE MAXIMUM RATINGS Operating Case Temperature -55°C to +125°C Storage Case Temperature -65°C to +150°C Power Supply Voltages +5VDC to +7VDC ±15VDC to ±18VDC 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 * 3.25 Watts Maximum Junction to Case Temperature (100% duty cycle) 16.25°C Junction-Case, Thermal Resistance 5°C/W * See Aeroflex Application Note # 112 for reference. ELECTRICAL CHARACTERISTICS – DRIVER SECTION 1/ 2/ INPUT CHARACTERISTICS, TX DATA IN OR TX DATA IN Parameter Condition Symbol Min Typ Max Unit "0" Input Current VIN = 0.4V IILD - -0.2 -0.4 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 "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 Note 1 tDXOFF - 300 450 nS Delay from TX inhibit, (1➝0) to active output Note 1 tDXON - 300 450 nS - VNOI - 0.8 10 mVp-p Note 2 ZOI 10K - - Ω VO 18 21 24 Vp-p VOS - - ±90 mVpeak t R & tF 200 250 300 nS tDTX - 220 350 nS INHIBIT CHARACTERISTICS Differential Output Noise, inhibit mode Differential Output Impedance (inhibited) * * See Aeroflex Application Note # 113 for reference. OUTPUT CHARACTERISTICS Differential output Level, Figure 3 Point B-B' ZO = 70Ω Output offset at point A-A on Figures 3 or 4, 2.5µS after midpoint crossing of the last bit Output rise / fall times (10% to 90% of p-p output) Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential output (Note 1) SCD4418N Rev A 3 ELECTRICAL CHARACTERISTICS – 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 = 0.4V IIL - -0.2 -0.4 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 - 40 150 nS VTH 0.60 0.80 1.10 Vp-p THRESHOLD CHARACTERISTICS (SINEWAVE INPUT) Point B - B' 1MHz Internal Threshold Voltage Figure 4 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 Note 6 tRXSK - - 10 nS Delay (average), from differential input zero crossings to RX DATA and RX DATA output 50% points Note 7 tDRX - 300 450 nS POWER SUPPLY CURRENT 1/ 2/ Duty Cycle Condition Symbol Typ Max Unit Point B-B', ZO = 70 Ω, VO = 29 VP-P Bit Pattern = FFFFHEX Figure 4 ICC IEE IL 5 25 18 10 35 30 mA 25% ICC IEE IL 20 40 18 30 60 30 50% ICC IEE IL 40 60 18 60 80 30 100% ICC IEE IL 85 105 18 120 140 30 Transmitter Standby SCD4418N Rev A 4 TYPICAL HYBRID POWER DISSIPATION * Power Supply Conditions Condition PSC1 VCC = +15V VEE = -15V VL = +5V Point B-B', ZO = 70 Ω, VO = 29 VP-P Bit Pattern = FFFFHEX Figure 4 Standby 100% Duty Cycle Unit Watts 0.540 2.167 PSC2 VCC = +15V VEE = -12V VL = +5V 0.465 1.852 PSC3 VCC = +12V VEE = -12V VL = +5V 0.450 1.600 * 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. 2. 3. 4. 5. 6. VCC = +15VDC ±0.75V, VEE = -151.VCC = +15VDC ±0.75V, VIL = +5VDC ±0.5V, TC = -55°C to +125°C, unless otherwise specified. All typical values are measured at +25°C. Characteristics guaranteed by design, not production tested. 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. At point A-A' on Figure 3 or 4, 2.5µS after midpoint crossing of the parity bit of the last word of a 660 µS message. 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 VP-P at 1MHz driven into Point B-B' of Figure 4 or 2.1 VP-P at 1MHz driven into Point 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 performed while the Transceiver is reading its own transmission. This condition is called "Wraparound". Standard TTL loads applied to RX DATA Outputs. SCD4418N Rev A 5 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 INT INT RX RX EXT EXT RX RX NC NC Transformer turns ratio: N = 0.707 Recommend Technitrol 1553-1 Terminal Input Impedance B – B' MIL-STD-1553B para 4.5.2.1.2.3 1KΩ minimum. 75KHz – 1MHz NOTE: Internal RX Threshold Wiring Shown 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 RX DATA OUT A Data Bus Wire Pair RX DATA OUT B' 55Ω A' TX DATA OUT RX DATA IN Zo INT RX INT RX NC NC EXT EXT RX RX R Transformer turns ratio: N=1 Recommend Technitrol 1553-1 R Terminal Input Impedance B – B' MIL-STD-1553B para 4.5.2.2.2.3 2KΩ minimum. 75KHz – 1MHz NOTE: External RX Threshold Wiring Shown – R < 10K Ohms. FIGURE 4 – DATABUS INTERFACE USING DIRECT COUPLING (FIGURE 10, MIL-STD-1553B) SCD4418N Rev A 6 LAST BIT tf * 90% Magnified View OUTPUT OFFSET* 6.0VP-P MIN 8.5VP-P MAX 0 volts 0 Volts OUTPUT OFFSET* 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 5 – TRANSMITTER (TX) OUTPUT WAVEFORM FIGURE 6 – TRANSMITTER (TX) OUTPUT OFFSET VP-P @ B–B' 4.0 30 TYPICAL 27 3.6 3.2 POWER DISSIPATION WATTS OUTPUT AMPLITUDE 24 21 18 15 12 Slope = 3VP-P/Vdc 9 6 2.8 2.4 2.0 PSC 1 PSC 2 1.6 PSC 3 1.2 0.8 0.4 3 0 0 1 2 3 4 5 6 7 8 9 0 0 Vdc 10 10 20 30 40 50 60 70 80 90 100 DUTY CYCLE, PERCENT CONTROL VOLTAGE FIGURE 7 – TRANSMITTER (TX) OUTPUT AMPLITUDE vs. CONTROL VOLTAGE FIGURE 8 – TYPICAL POWER DISSIPATION vs. DUTY CYCLE SCD4418N Rev A 7 CONFIGURATIONS AND ORDERING INFORMATION Model No. Receiver Data level ACT4418N Normally Low Plug In ACT4418N-2 Normally Low Flat Pack Special Note Configuration Use the ACT4418N To replace the ARX4418 PACKAGE CONFIGURATION OUTLINE PLUG-IN PACKAGE 1.27 MAX 1.10 24 13 1.27 MAX 1.10 1 12 0.175 MAX 0.24 MIN 0.018 DIA. ±0.002 FLAT PACKAGE Pin Function 0.100 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 TX DATA OUT TX DATA OUT TX GND (+5) +15V (TX) EXT. DATA THRES INT. DATA THRES RX DATA OUT STROBE RX GND (+5V) RXDATA OUT INT. DATA THRES EXT. DATA THRES +15V (RX) AMP CONTROL RX DATA IN RX DATA IN GND CASE GND -15V (RX) +5V TX INHIBIT TX DATA IN TX DATA IN -15V(TX) 1.27 MAX 0.017 ±0.002 Pin 1 & ESD Designator 1.27 MAX 0.10 Typ 0.400 MIN 2 sides 0.009 ±0.002 0.167 for Low Profile Flat Pack 0.200 for Std Flat Pack 0.080 ±0.015 Notes 1. Dimensions shown are in inches. 2. Pins are equally spaced at 0.100±0.002 tolerance, non-cumulative, each row. 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 [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 SCD4418N Rev A 8