The MA17501 Execution Unit is a component of the Dynex Semiconductor MAS281 chip set. Other chips in the set include the MA17502 Control Unit and the MA17503 lnterrupt Unit. Also available is the peripheral MA31751 Memory Management Unit/Block Protection Unit. These chips in conjunction implement the full MlL-STD-1750A lnstruction Set. The MA17501 - consisting of a full function 16-bit ALU, 24 x 16-bit dual-port RAM register file, 32-bit barrel shifter, 4 x 24bit parallel multiplier, synchronisation clock generation logic, and microcode decode logic - provides all computational, logical, and synchronisation functions for the chip set. Table 1 provides brief signal definitions. The MA17501 is offered in several package styles including; dual-in-line, flatpack and leadless chip carrier. Full packaging information is given at the end of the document.