ct1775 Aeroflex Circuit Technology, ct1775 Datasheet
ct1775
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ct1775 Summary of contents
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... Command, Status or Data words, under subsystem control receiver, it accepts serial MIL-STD-1553 or MACAIR transmissions and transfers all Command, Status and Data words to the 8 bit or 16 bit data highway, under subsystem control. The CT1775 also provides flags to the subsystem when Broadcast, Mode Code, and Own Address (with parity) commands are decoded. ...
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... SCDCT1775 Rev ...
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... Idle 25% Transmit 100% Transmit -12V Supply Voltage Tolerances Current Drain Idle 25% Transmit 100% Transmit Temperature Range Operating (Case) Storage Physical Characteristics Size 68 pin DDIP SCDCT1775 Rev B TABLE 1 – CT1775 SPECIFICATIONS 3 VALUE UNITS 4 min KΩ 40 max V P-P 1 typ V P-P 40 min dB ±10 min V ...
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... Since the status word has the correct address and the same sync as a command word, the CT1775 will set RT ENABLE and VAL CMD WD. For on line wrap around operation therefore necessary to reset RT ENABLE after transmission of a status word. This can be accomplished by inverting SEND DATA and applying it to DEC RST during status word transmission ...
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... INITIALIZATION To ensure error-free operation desirable to reset the CT1775 to its initialized state upon power turn-on. The MRST (master reset) signal is provided for this purpose. Both the flecoder and encoder, as well as all flags, are reset by a LOW on MRST ...
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... FLAG OUTPUTS are valid only when VALID WORD is LOW. Flags are MODE CODE, RT Enable, BROADCAST and VAL CMD WD. 4. BIT STATUS is valid only if wraparound transmit plus receive cycle has been performed. LATCH DATA must be HIGH, and either S/T SELECT or RX STROBE must be HIGH for the full wraparound cycle duration. SCDCT1775 Rev B SYNC 15 ...
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... TAKE DATA COMM / DATA SYNC SERIAL DATA OUT DATA SELECT TRI-STATE DATA VALID WORD MODE CODE RT ENABLE BROADCAST VAL CMD WD FIGURE 5 – DECODER DETAIL TIMING SCDCT1775 Rev ESC OUT START CYCLE STROBE SYNC STROBE DATA 110ns MAX 180ns MIN ...
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... SCDCT1775 Rev B 8 ...
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... BIT STATUS 13 LATCH DATA 1 14 VAL CMD WD 15 BDCST INH 16 TMADD1* 17 TMADD3* 18 XTAL 19 CLOCK OUT 20 TAKE DATA SCDCT1775 Rev DESCRIPTION (mA) (mA) (mA) Power supply and logic return. +5V Power for oscillator and clock driver. No connection. 20 -0.4 A LOW on this input inhibits the transmitter. ...
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... BROADCAST 32 TMADD0* 33 TMADD2* 34 TMADD4* 35 TMADDP 36 CHAN SELECT 100 37 ODD PARITY 38 D15 SCDCT1775 Rev DESCRIPTION (mA) (mA) (mA) 20 -0.4 A LOW on this input (1 µsec minimum) resets the decoderto its initialized state, resets COMM/DATA SYNC to a LOW, and resets VALID WORD to a HIGH. ...
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... DATA SELECT 2 54 DATA SELECT 1 55 ENA PAR CHECK 56 D14 57 D12 58 D10 LOAD DATA 1 65 GND SCDCT1775 Rev DESCRIPTION (mA) (mA) (mA) 20 -0.2 -12 12 Part of 16 bit parallel tri-state I/O. 20 -0.2 -12 12 Part of 16 bit parallel tri-state I/O. 20 -0.2 ...
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... NOTES: In the above table, the symbols are defined as follows: *Indicates use of an internal pull-up resistor maximum input HIGH current with maximum input LOW current with maximum output HIGH current for maximum output LOW current for V OL SCDCT1775 Rev DESCRIPTION (mA) (mA) (mA) -12V power supply input ...
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... VAL CMD WD 31 BROADCAST 15 BDCST INH 32 TM ADD0 16 TM ADD ADD ADD ADD 4 FIGURE 3 – PIN CONNECTION DIAGRAM, CT1775 AND PINOUT TABLE SCDCT1775 Rev B CT1775 PIN OUT DESCRIPTION PIN # 1 GND 2 +5V OSC/ CLOCK PWR 3 N INHIBIT TX DATA OUT ...
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... 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. SCDCT1775 Rev B ORDERING INFORMATION SCREENING 1.850 Pin 2 Pin 16 ...