TMC2249A

www.DataSheet4U.com www.fairchildsemi.com TMC2249A Digital Mixer 12 x 12 Bit, 60 MHz 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 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. The TMC2249A utilizes a pipelined, bus-oriented structure offering significant flexibility. Input register clock enables and programmable input data pipeline delays on each port offer an adaptable input s...