**The PDSP1601 is a high performance 16-bit arithmetic logic unit with an

independent on-chip 16-bit barrel shifter. The PDSP1601A has two operating modes giving 20MHz or 10MHz register-to-register transfer rates.**

The PDSP1601 supports Multicycle multiprecision operation. This allows a single device to operate at 20MHz for 16-bit fields, 10MHz for 32-bit fields and 5MHz for 64-bit fields. The PDSP1601 can also be cascaded to produce wider words at the 20MHz rate using the Carry Out and Carry In pins. The Barrel Shifter is also capable of extension, for example the PDSP1601 can used to select a 16-bit field from a 32-bit input in 100ns.

FEATURES

■ 16-bit, 32 instruction 20MHz ALU
■ 16-bit, 20MHz Logical, Arithmetic or Barrel Shifter
■ Independent ALU and Shifter Operation
■ 4 x 16-bit On Chip Scratchpad Registers
■ Multiprecision Operation; e.g. 200ns 64-bit Accumulate
■ Three Port Structure with Three Internal Feedback Paths Eliminates I/O Bottlenecks
■ Block Floating Point Support
■ 300mW Maximum Power Dissipation
■ 84-pin Pin Grid Array or 84 Contact LCC Packages or 100 pin Ceramic Quad Flat Pack

APPLICATIONS

■ Digital Signal Processing
■ Array Processing
■ Graphics
■ Database Addressing
■ High Speed Arithmetic Processors