Description

The TMC2249A is a high-speed digital arithmetic circuit consisting of two 12-bit multipliers, an adder and a cascadeable accumulator. All four multiplier inputs are simultaneously accessible to the user, and each includes a userprogrammable pipeline delay of up to 16 clocks in length. The 24-bit adder/subtractor is followed by an accumulator and 16-bit input port which allows the user to cascade multiple TMC2249As. A new 16-bit accumulated output is available every clock, up to the maximum rate of 60 MHz. All inputs and outputs are registered except the three-state output enable, and all are TTL compatible.

Features

• 60 MHz input and computation rate

• Two 12-bit multipliers

• Separate data and coefficient inputs

• Independent, user-selectable pipeline delays of 1 to 16 clocks on all input ports

• Separate 16-bit input port allows cascading or addition of a constant

• User-selectable rounded output

• Internal 1/2 LSB rounding of products

• Fully registered, pipelined architecture

• Available in 120-Pin CPGA, PPGA, MPGA or MQFP

Applications

• Video switching

• Image mixing

• Digital signal modulation

• Complex frequency synthesis

• Digital filtering

• Complex arithmetic functions