ACT4438–1 Transceiver for MIL-STD-1553 / 1760 in a Chipscale Package Preliminary Features CIRCUIT TECHNOLOGY www.aeroflex.com • Transceiver meets military data bus requirements, MIL-STD-1553 and MIL-STD-1760 • Low power dissipation at full output power • Single +5V power supply • Current Source Transmitter Output • Bipolar Monolithic Construction • Miniature Chipscale Package Bumped Chip Carrier™ (BCC++) Shown 2X NOTE: BCC++ and Bumped Chip Carrier are Trademarks of Fujitsu Ltd. TX DATA OUT DRIVER SHAPING OUTPUT STAGE REFERENCE COMP. ACTIVE FILTER COMP. TX DATA IN TX DATA OUT TX INHIBIT RISET +5 V RX DATA OUT GROUND RX DATA IN RX DATA IN STROBE INPUT AMP The Aeroflex Circuit Technology Model ACT4438-1 is a next generation monolithic transceiver which provide full compliance with MIL-STD-1553/1760 and data bus requirements in a Bumped Chip Carrier™ (BCC++) with the lowest standby power consumption and single power supply operation. The Model ACT4438-1 performs the front-end analog function of inputting and outputting data through a transformer to a MIL-STD-1553/1760 data bus with a few external components. 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 Block Diagram (without Transformer) TX DATA IN General Description RX DATA OUT The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1:2.5 transformer, isolated on the data bus side with two 55 Ohm fault isolation resistors for direct stub coupling. The data bus signal produced for RISET = 2.7K Ohm is typically 7.5 Volts nominal P-P at A-A’, See Figure 5. When both DATA and DATA inputs are held low, 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 eroflex Circuit Technology – Data Bus Modules For The Future © SCD4438-1 REV A 11/19/01 condition of the data inputs and disables the transmitter. (See Transmitter Logic Waveform, Figure 1.) 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 Waveform, Figure 2.) The pre-set internal thresholds will detect data bus signals exceeding 1.150 Volts P-P and reject signals less than 0.6 volts P-P when used with a 1:2.5 turns ratio transformer. (See Figure 5 for transformer data and typical connection.) Figure 1. Transmitter Logic Waveforms DATA IN DATA IN INHIBIT LINE TO LINE OUTPUT NOTES: 1. DATA and DATA inputs must be complementary waveforms or 50% duty cycle average, with no delays between them. 2. 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. Aeroflex Circuit Technology 2 SCD4438-1 REV A 11/19/01 Plainview NY (516) 694-6700 Absolute Maximum Ratings Operating Case Temperature -55°C to +90°C Storage Case Temperature -65°C to +150°C Positive Power Supply Voltage -0.3 V to +7.0 V Receiver Differential Input ±10 V Receiver Input Voltage (Common Mode) ±5 V Driver Peak Output Current 650 mA Total Package Power Dissipation over the full operating case temperature rise at 100% duty cycle 2.2 Watt Maximum Junction to Case temperature rise 44°C Thermal Resistance, Junction to bottom of case 20°C/W Electrical Characteristics – Driver Section 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 40 µA "0" Input Voltage VIHD - - 0.7 V "1" Input Voltage VIHD 2.0 - - V Inhibit Characteristics "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 - 150 300 nS Delay from TX inhibit, (1➝0) to active output tDXON - 150 300 nS Differential Output Noise, inhibit mode VNOI - 2 10 mV p-p Note 1 ZOI 2K - - Ω RL = 35 Ω VO 6.5 7.5 8.0 V p-p tr 100 200 300 nS VOS - - tDTX - 150 Differential Output Impedance (inhibited) Output Characteristics Differential output level Rise and Fall Times (10% to 90% of p-p output) Output Offset at point A-A’ on Fig 5., 2.5 µS after midpoint crossing of the parity bit of the last word of a 660 µS message RL = 35 Ω Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential signal ±90 300 mV peak nS Note 1. Power ON/OFF, measured from 75KHz to 1MHz at Point A-A. See Figure 5 Aeroflex Circuit Technology 3 SCD4438-1 REV A 11/19/01 Plainview NY (516) 694-6700 Electrical Characteristics – Receiver Section Parameter Condition Differential Voltage Range Common Mode Rejection Ratio Symbol Min Typ Max Unit VIDR - - 20 V peak CMRR 45 - - dB Strobe Characteristics (Logic "0" inhibits output) if not used, a 1K pullup to 5 V is recommended "0" Input Current VS = 0.4 V 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) tSD(ON) - 90 200 nS Strobe Delay (turn-off) tSD(OFF) - 90 200 nS VTH 0.60 0.8 1.15 V p-p Threshold Characteristics (Sinewave input ) 100KHz1MHz Input Threshold Voltage (Referred to the bus) Output Characteristics, RX DATA and RX DATA "1" State IOH = -0.4 mA VOH 2.5 3.7 - V "0" State IOL = 4 mA VOL - 0.3 0.5 V tDRX - 330 450 nS Delay, (average)from differential input zero crossings to RX DATA and RX DATA output 50% points Power Data Maximum Currents, (+5V) For RISET = Duty Cycle 2.2 KΩ Typ Max 20 mA 30 mA 25% duty cycle 155 mA 185 mA 50% duty cycle 264 mA 335 mA 100% duty cycle 600 mA 650 mA Transmitter Standby Power Supply Voltage +V 4.75 to 5.5 Volts Note 2. Vcc = 5 Volts ±0.1 V, for all measurements unless otherwise specified. Note 3. Specifications apply over the case temperature range of -55°C to +90°C unless otherwise specfied. Note 4. All typical values are measured at +25°C. Aeroflex Circuit Technology 4 SCD4438-1 REV A 11/19/01 Plainview NY (516) 694-6700 Figure 3 – Transmitter (TX) Output Waveform Figure 4 – Transmitter (TX) Output Offset LAST BIT t f* 90% Magnified View OUTPUT OFFSET* 6V P-P MIN 7.7V P-P MAX 0 Volts 0 volts OUTPUT OFFSET* 10% 2.5 µsec tr* *Offset measured at point A-A’ in Fig 5 * Rise and fall times measured at point A-A’ in Fig 5 Figure 5 – Typical Transformer Connection Direct Stub Figure 6 – Power Dissipation vs. Duty Cycle 2200 +5V 2000 0.1µF ZO ZO TX DATA OUT 18-21 2 ACT4438-1 55Ω 1:2.5 1 A 4 5 6 TX DATA OUT RX DATA IN RX DATA IN 37 1600 ZO 10,11,33,34 RISET 1800 POWER DISSIPATION MILLIWATTS 6.8µF 23-26 3 7 8 52 51 GND A’ 55Ω Transformer Model: Use Pulse/Technitrol Part# 1553-45 or equivalent 1400 1200 800 Typical 600 400 200 0 9,35,39,50 2.7KΩ Maximum 1000 10 20 30 40 50 60 70 80 90 100 DUTY CYCLE – PERCENT Note: Vcc = 5 Volts, Vbus (pt A-A') at 7.5 Volts P-P Configurations and Ordering Information Model No. ACT4438-1 Aeroflex Circuit Technology Screening Level Receiver and Transmitter Data Levels (See Figure 1) Case Industrial Temperature -55°C to +90°C Normally Low 56 Bump Chip Carrier 5 SCD4438-1 REV A 11/19/01 Plainview NY (516) 694-6700 Package Pin Out Description - ACT4438-1 Pin # Function Pin # Function 1 NC 29 NC 2 NC 30 NC 3 NC 31 NC 4 NC 32 NC 5 VCC 33 VCC * 6 TX DATA IN 34 VCC * 7 TX DATA IN 35 GND 8 TX INHIBIT IN 36 NC 9 GND 37 RISET 10 VCC * 38 NC 11 VCC * 39 GND 12 NC 40 RX DATA OUT 13 NC 41 RX STROBE 14 NC 42 RX DATA OUT 15 NC 43 NC 16 NC 44 NC 17 NC 45 NC 18 TX DATA OUT * 46 NC 19 TX DATA OUT * 47 NC 20 TX DATA OUT * 48 NC 21 TX DATA OUT * 49 VCC 22 NC 50 GND 23 TX DATA OUT * 51 RX DATA IN 24 TX DATA OUT * 52 RX DATA IN 25 TX DATA OUT * 53 NC 26 TX DATA OUT * 54 NC 27 NC 55 NC 28 NC 56 NC * High current lines Aeroflex Circuit Technology 6 SCD4438-1 REV A 11/19/01 Plainview NY (516) 694-6700 CIRCUIT TECHNOLOGY Package Description PIN 1 IDENTIFER & ESD INDICATOR TOP VIEW Y X Z 0.80 MAX 8.00 ±0.10 0.67±0.025 0.075±0.025 0.20 8.00 ±0.10 4438-1 7.20 TYP 0.14 MIN "A" C 0.2 0.45 ±0.03 0.08 M Z X Y 0.45 ±0.03 0.08 M Z X Y 7.15 TYP 5.80 C.L.(Pkg) C.L.(Pkg) 0.50 ±0.10 0.14 MIN 7.20 TYP 5.80 DETAIL "C" C 0.2 "B" 0.30 ±0.03 0.08 M Z X Y 0.45 ±0.03 0.08 M Z X Y 7.15 TYP "C" 0.40 ±0.03 0.08 M Z X Y 0.50 TYP 0.50±0.10 0.45 ±0.03 0.08 M Z X Y 0.50 TYP 0.05 Z 0.20 Z BOTTOM VIEW DETAIL "A" DETAIL "B" Notes 1. Dimensions in millimeters Specifications subject to change without notice. Aeroflex Circuit Technology 35 South Service Road Plainview New York 11803 Aeroflex Circuit Technology Telephone: (516) 694-6700 FAX: (516) 694-6715 Toll Free Inquiries: 1-(800) THE-1553 7 SCD4438-1 REV A 11/19/01 Plainview NY (516) 694-6700