COM1553A Datasheet | Standard Microsystems

1553A JLPC FAMILY MIL-STD-1553A "SMART®" Features D Support of MIL-STD-1553A D Operates as a: Remote Terminal Responding Bus Controller Initiating D Performs Parallel to Serial Conversion when Transmitting D Performs Serial to Parallel Conversion when Receiving D patible with HD-15531 Manchester Encoder/ Decoder D All Inputs and Outputs are TTL patible D Single +5 Volt Supply D COPLAMOS® N Channel Ma S Technology D Available in PC Board Form from Grumman Aerospace Corporation PIN CONFIGURATION "0" MSG Fl G 1 "O"WRO Fl G 2 IVWF 3 OTA AVl 4 RCV INT 5 TX INT 6 CMO SYN 7 OTA SYN 8 RCV NRZ 9 SWE 10 pa R 11 i A 12 RCVCl K13 VW 14 SEND DATA 15 OTA RQST 16 MSG Pl T 17 TX ENA 18 TX Cl K 19 XMIT NRZ20 40GNO 39 BOCST 38Vcc 37 A01 36 A02 35 A03 34 A04 33 A05 32 ROE 3107 30 D6 2905 2804 2703 2602 2501 2400 23 TOE 22 TX MODE 21 Be PACKAGE: 40-pin D.I.P. GENERAL DESCRIPTION The 1553A SMART® (Synchronous Mode Avionics Receiver/Transmitter) is a special purpose COPLAMOS N-Channel Ma S/LSI device designed to provide the interface between a parallel 8-bit bus and a MIL-STD1553A serial bit stream. The 1553A is a double buffered serial/parallel and parallel/serial converter providing all of the "hand shaking" required between a Manchester decoder/ encoder and a microprocessor as well as the protocol handling for both a MIL-STD-1553 bus controller and remote terminal. The 1553A performs the following functions in response to a 16 bit mand Word. It provides address detection for the first five bits of the serial data input. If all 1's appear in the address field, a broadcast signal is generated. The sixth bit is decoded as mode: transmit or receive. The next five bits are decoded for zero message flag and special flags in the subaddress/mode field. The last five bits (word-count field) are decoded determining the number of words to be received or transmitted. When receiving data sync the 1553A performs a serial to parallel conversion, buffers the 16 bit...