描述 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.

特性 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