CT1820 Datasheet | Aeroflex Circuit Technology

Features - Performs Encoder, Decoder, Logic and Control functions of a Data Bus Terminal to MIL-STD-1553 specifications, including Address, Mode Code and Broadcast Decoding and Terminal Fail Safe - Flexibility - all control lines accessible - Parallel tri-state subsystem l/O bus patible with both 16 bit and 8 bit systems - Dual rank l/O registers for versatile subsystem tlmlng X LA LE - Operates from +5VDC @ 40m A typical (25m A CT1820) F - Self-contained oscillator and clock driver - Look-ahead serial receive data output - Self-test, on-line wraparound, plus off-line capability 9001 A E RO I NC . General Description RTIFIED The CT1555-3/CT1820 Bit Processor Unit (BPU) is an advanced Hybrid Microcircuit that provides the interface between a MIL-STD-1553 Transceiver such as CT3231M or CT3232M, and the subsystem internal parallel data bus. The unit can be employed as the mux bus interface for Remote Subsystems or Master Terminal Bus Controllers, thus providing a mon interface for all systems municating over the bus. The unit places no restrictions on mand, Response or polling operations as it transfers all mand, Status and Data words from the bus to parallel output lines, together with error information, bus status and handshaking signals. It also contains 5 Bit Address Recognition, Broadcast and Mode Code Decode, Terminal Fail Safe Signal and Self Test. In the transmit mode, it accepts parallel data from the user and transmits mand, Status and Data words, under subsystem control, to the data bus. Positive handshaking signals provide logic control synchronisation between the unit and the subsystem for direct data flow. The hybrid is pletely patible with all the electrical and functional spec requirements of MIL-STD-1553 A & B. 43 DATA SELECT 2 45 46 47 48 50 44 41 42 54 56 56 53 43 43 43 LOAD DATA 2 LOAD DATA 1 DATA SELECT 1 7 (OPTIONAL) SERIAL INPUT (MSB) D15 FIRST RANK REC’V REG DO - D7 SECOND RANK REC’V REG DO - D7 FIRST...