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| ACT4438-1 Transceiver for MIL-STD-1553 / 1760 in a Chipscale Package Preliminary Features * 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 CarrierTM (BCC++) CIRCUIT TECHNOLOGY www.aeroflex.com General Description 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 CarrierTM (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. Shown 2X NOTE: BCC++ and Bumped Chip Carrier are Trademarks of Fujitsu Ltd. Block Diagram (without Transformer) Transmitter 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 TX DATA OUT TX DATA IN TX DATA IN DRIVER SHAPING OUTPUT STAGE TX DATA OUT TX INHIBIT RISET +5 V GROUND REFERENCE COMP. RX DATA OUT RX DATA IN RX DATA IN INPUT AMP ACTIVE FILTER COMP. RX DATA OUT STROBE eroflex Circuit Technology - Data Bus Modules For The Future (c) 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: Waveforms shown are for normally low devices. Note overlap Aeroflex Circuit Technology 2 SCD4438-1 REV A 11/19/01 Plainview NY (516) 694-6700 Absolute Maximum Ratings Operating Case Temperature Storage Case Temperature Positive Power Supply Voltage Receiver Differential Input Receiver Input Voltage (Common Mode) Driver Peak Output Current Total Package Power Dissipation over the full operating case temperature rise at 100% duty cycle Maximum Junction to Case temperature rise Thermal Resistance, Junction to bottom of case -55C to +90C -65C to +150C -0.3 V to +7.0 V 10 V 5 V 650 mA 2.2 Watt 44C 20C/W Electrical Characteristics - Driver Section Input Characteristics, TX DATA in or TX DATA in Parameter "0" Input Current "1" Input Current "0" Input Voltage "1" Input Voltage Condition VIN = 0.4 V VIN = 2.7 V Symbol IILD IIHD VIHD VIHD Min 2.0 Typ -0.2 1 - Max -0.4 40 0.7 - Unit mA A V V Inhibit Characteristics "0" Input Current "1" Input Current "0" Input Voltage "1" Input Voltage Delay from TX inhibit, (01) to inhibited output Delay from TX inhibit, (10) to active output Differential Output Noise, inhibit mode Differential Output Impedance (inhibited) Note 1 VIN = 0.4 V VIN = 2.7 V IILI IIHI VILI VIHI tDXOFF tDXON VNOI ZOI 2 2K -0.2 1.0 150 150 2 - -0.4 40 0.7 300 300 10 - mA A V V nS nS mV p-p 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 S after midpoint crossing of the parity bit of the last word of a 660 S message Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential signal RL = 35 RL = 35 VO 6.5 100 7.5 200 8.0 300 V p-p nS tr VOS - - 90 mV peak tDTX - 150 300 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 Differential Voltage Range Common Mode Rejection Ratio Condition Symbol VIDR CMRR Min 45 Typ - Max 20 - Unit V peak dB Strobe Characteristics (Logic "0" inhibits output) if not used, a 1K pullup to 5 V is recommended "0" Input Current "1" Input Current "0" Input Voltage "1" Input Voltage Strobe Delay (turn-on) Strobe Delay (turn-off) VS = 0.4 V VS = 2.7V IIL IIH VIL VIH 2.0 -0.2 1 90 90 -0.4 +40 0.7 200 200 mA A V V nS nS tSD(ON) tSD(OFF) Threshold Characteristics (Sinewave input ) Input Threshold Voltage (Referred to the bus) 100KHz1MHz VTH 0.60 0.8 1.15 V p-p Output Characteristics, RX DATA and RX DATA "1" State "0" State Delay, (average)from differential input zero crossings to RX DATA and RX DATA output 50% points IOH = -0.4 mA IOL = 4 mA VOH VOL 2.5 3.7 0.3 330 0.5 450 V V nS tDRX Power Data Maximum Currents, (+5V) For RISET = Duty Cycle Transmitter Standby 25% duty cycle 50% duty cycle 100% duty cycle 2.2 K Typ 20 mA 155 mA 264 mA 600 mA Max 30 mA 185 mA 335 mA 650 mA 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 -55C to +90C unless otherwise specfied. Note 4. All typical values are measured at +25C. 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 sec tr* * Rise and fall times measured at point A-A' in Fig 5 *Offset measured at point A-A' in Fig 5 Figure 5 - Typical Transformer Connection Direct Stub +5V 6.8F 0.1F Figure 6 - Power Dissipation vs. Duty Cycle 2200 2000 ZO ZO ZO 1 4 5 6 23-26 52 51 1800 1600 POWER DISSIPATION MILLIWATTS 1400 1200 1000 800 Typical 600 400 200 0 10 20 30 40 50 60 70 80 90 100 Maximum 10,11,33,34 TX DATA OUT 18-21 1:2.5 55 A ACT4438-1 TX DATA OUT RX DATA IN RX DATA IN RISET 37 2 3 7 8 A' 55 GND 9,35,39,50 Transformer Model: Use Pulse/Technitrol Part# 1553-45 or equivalent 2.7K DUTY CYCLE - PERCENT Note: Vcc = 5 Volts, Vbus (pt A-A') at 7.5 Volts P-P Configurations and Ordering Information Model No. Screening Level Industrial Temperature -55C to +90C Receiver and Transmitter Data Levels (See Figure 1) Normally Low Case ACT4438-1 56 Bump Chip Carrier Aeroflex Circuit Technology 5 SCD4438-1 REV A 11/19/01 Plainview NY (516) 694-6700 Package Pin Out Description - ACT4438-1 Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 * High current lines Function NC NC NC NC VCC TX DATA IN TX DATA IN TX INHIBIT IN GND VCC * VCC * NC NC NC NC NC NC TX DATA OUT * TX DATA OUT * TX DATA OUT * TX DATA OUT * NC TX DATA OUT * TX DATA OUT * TX DATA OUT * TX DATA OUT * NC NC Pin # 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 Function NC NC NC NC VCC * VCC * GND NC RISET NC GND RX DATA OUT RX STROBE RX DATA OUT NC NC NC NC NC NC VCC GND RX DATA IN RX DATA IN NC NC NC NC 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 Y X TOP VIEW 8.00 0.10 0.20 0.80 MAX 0.670.025 Z 0.0750.025 4438-1 8.00 0.10 BOTTOM VIEW 7.20 TYP 0.50 TYP 0.500.10 0.14 MIN 0.20 Z 0.05 Z 0.50 TYP 0.45 0.03 0.08 M Z X Y 5.80 7.20 TYP 0.50 0.10 C.L.(Pkg) C.L.(Pkg) 5.80 7.15 TYP DETAIL "C" C 0.2 0.14 MIN C 0.2 "B" 0.45 0.03 0.08 M Z X Y 7.15 TYP "C" 0.30 0.03 0.08 M Z X Y "A" 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 0.40 0.03 0.08 M Z X Y 0.45 0.03 0.08 M Z X Y 0.45 0.03 0.08 M Z X Y |
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