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ACT4455 Dataheets PDF



Part Number ACT4455
Manufacturers Aeroflex Circuit Technology
Logo Aeroflex Circuit Technology
Description SINGLE SUPPLY TRANSCEIVER
Datasheet ACT4455 DatasheetACT4455 Datasheet (PDF)

ACT 4455 / 4459 SINGLE SUPPLY TRANSCEIVERS FOR MIL-STD-1553/1760 Features • Single 5 Volt Supply Operation • Low Power Dissipation • Small Size & Light Weight • Single Transceiver Save Space & Cost • Outstanding MIL-STD-1553 performance • Processed and Screened to Mil-STD-883 Specs • Radiation Hard Dielectric Isolation Monolithic construction for Severe Environments • Superior High Frequency Line Transient and Input Ripple Rejection • Input and Output TTL Compatible Design • DESC SMD# 5962-9674.

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ACT 4455 / 4459 SINGLE SUPPLY TRANSCEIVERS FOR MIL-STD-1553/1760 Features • Single 5 Volt Supply Operation • Low Power Dissipation • Small Size & Light Weight • Single Transceiver Save Space & Cost • Outstanding MIL-STD-1553 performance • Processed and Screened to Mil-STD-883 Specs • Radiation Hard Dielectric Isolation Monolithic construction for Severe Environments • Superior High Frequency Line Transient and Input Ripple Rejection • Input and Output TTL Compatible Design • DESC SMD# 5962-96741 General Description: The Aeroflex Circuit Technology ACT4455 / 4459 series are next generation monolithic transceiver designs which provides full compliance with MIL-STD-1553A/B and 1760 requirements in the smallest packages with low power consumption and single power supply operation. The ACT4455 / 4459 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. www.aeroflex.com/act1.htm CIRCUIT TECHNOLOGY TX DATA OUT TX DATA IN TX DATA IN DRIVER ACTIVE FILTER OUTPUT STAGE TX DATA OUT Transmitter: The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1:2.5 ratio transformer, isolated on the data bus side with two 52.5 Ohm fault isolation resistors, and loaded by two 70 Ohm terminations, the data bus signal is typically 7.5 Volts P-P at A-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, TX INHIBIT RX DATA OUT COMP. +5 V REFERENCE +5V RTN RX DATA IN RX DATA IN INPUT AMPLIFIER ACTIVE FILTER RX DATA OUT COMP. STROBE Block Diagram (without Transformer) eroflex Circuit Technology – Data Bus Modules For The Future © SCD4455 REV A 1/29/98 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 Waveform, Figure 1.) The Transmitter may be safely operated for an indefinite period with the bus (point A-A') short circuited at 100% duty cycle. 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 1.20 Volts P-P and reject signals less than 0.6 volts P-P when used with a transformer. (See Figure 5 for transformer data and typical connection.) A low level at the Strobe input inhibits the DATA and DATA outputs. If unused, a 2K pull-up to +5 Volts is recommended Receiver: The Receiver section accepts bi-phase differential data at the input Figure 1 — Transmitter Logic Waveforms Idealized* 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 2 — Receiver Logic Waveforms Idealized* LINE TO LINE INPUT STROBE DATA OUT DATA OUT Note overlap * See Figure 8 For Actual Waveforms Aeroflex Circuit Technology 2 SCD4455 REV A 1/29/98 Plainview NY (516) 694-6700 Absolute Maximum Ratings Operating case temperature Storage case temperature Power supply voltage Logic input voltage Receiver differential input Receiver input voltage (common mode) Driver peak output current Total package power dissipation over the full operating case temperature rise Maximum junction to case temperature Thermal resistance – junction to case -55°C to +125°C -65°C to +150°C -0.3 V to +7.0 V -0.3 V to +5.5 V ±10 V ±5 V 600 mA 2 Watts (Note: Normal operation conditions require one transceiver on and the other off.) 10°C 5°C/W Electrical Characteristics — Driver Section Input Characteristics, TX DATA in or TX DATA in (Notes 2 & 3 apply) 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 VILD VIHD Min Typ -0.2 1 Max -0.4 40 0.7 Unit mA µA V V 2.0 Inhibit Characteristics "0" Input Current "1" Input Current "0" Input Voltage "1" Input Voltage Delay from TX inhibit, (0¡1) to inhibited output Delay from TX inhibit, (1¡0) to active output Differential output noise, inhibit mode Differential output impedance (inhibited) Note 1 VIN=0.4V VIN=2.7V IILI IIHI VILI VIHI tDXOFF tDXON VNOI ZOI 2K 2.0 250 150 2 350 250 10 -0.2 1.0 -0.4 40 0.7 mA µA V V nS nS mVP-P Ω Output Characteristics Differential output level Ri.


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