DESCRIPTION

The LF2249 is a high-speed digital mixer comprised of two 12-bit multipliers and a 24-bit accumulator. All multiplier inputs are user accessible, and each can be updated on every clock cycle. The LF2249 utilizes a pipelined architecture with fully registered inputs and outputs and an asynchronous three-state output enable control for optimum flexibility.

FEATURES

❑ 40 MHz Data and Computation Rate

❑ Two 12 x 12-bit Multipliers with Individual Data Inputs

❑ Separate 16-bit Input Port for Cascading Devices

❑ Independent, User-Selectable 1–16 Clock Pipeline Delay for Each Data Input

❑ User-Selectable Rounding of Products

❑ Fully Registered, Pipelined Architecture

❑ Three-State Outputs

❑ Fully TTL Compatible

❑ Replaces TRW/Raytheon/Fairchild TMC2249

❑ 120-pin PQFP