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TMC2249A

Fairchild Semiconductor
Part Number TMC2249A
Manufacturer Fairchild Semiconductor
Description Digital Mixer
Published Apr 16, 2005
Detailed Description www.DataSheet4U.com www.fairchildsemi.com TMC2249A Digital Mixer 12 x 12 Bit, 60 MHz Features • • • • • • • • • 60 MHz...
Datasheet PDF File TMC2249A PDF File

TMC2249A
TMC2249A

Overview
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 structure for high-speed digital systems.
Following the multipliers, the user may perform addition or subtraction of either product, arithmetic rounding to 16 bits, and accumulation and summation of products with a cascading input.
The output port allows access to all 24 bits of the internal accumulator by switching between overlapping least and most-significant 16-bit words, and a three-state output enable simplifies connection to an external system bus.
The TMC2249A has numerous applications in d...


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