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TMC2249AG1C2 Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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TMC2249AG1C2 Datasheet(HTML) 1 Page - Fairchild Semiconductor |
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1 / 18 page  www.fairchildsemi.com REV. 1.0.2 7/6/00 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 cascade- able accumulator. All four multiplier inputs are simulta- neously accessible to the user, and each includes a user- programmable 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 multi- ple TMC2249As. A new 16-bit accumulated output is avail- able every clock, up to the maximum rate of 60 MHz. All inputs and outputs are registered except the three-state out- put enable, and all are TTL compatible. Logic Symbol TMC2249A Digital Mixer CLK NEG1 NEG2 SWAP OE ACC RND FT CASEN S15-0 Delay 1-16 Delay 1-16 Delay 1-16 Delay 1-16 B11-0 ADEL3-0 A11-0 BDEL3-0 ENA ENB C11-0 CDEL3-0 ENC D11-0 CAB15-0 DDEL3-0 END 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 out- put enable simplifies connection to an external system bus. The TMC2249A has numerous applications in digital pro- cessing algorithms, from executing simple image mixing and switching, to performing complex arithmetic functions and complex waveform synthesis. FIR filters, digital quadrature mixers and modulators, and vector arithmetic functions may also be implemented with this device. Fabricated in a submicron CMOS process, the TMC2249A operates at guaranteed clock rates of up to 60 MHz over the full temperature and supply voltage ranges. It is pin- and function-compatible with Fairchild’s TMC2249, while pro- viding higher speed operation and lower power dissipation. It is available in a 120 pin Ceramic Pin Grid Array (CPGA), 120 pin Plastic Pin Grid Array (PPGA), 120 lead MQFP to PPGA package (MPGA), and a 120 lead Metric Quad Flat- Pack (MQFP). TMC2249A Digital Mixer 12 x 12 Bit, 60 MHz |
Similar Part No. - TMC2249AG1C2 |
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Similar Description - TMC2249AG1C2 |
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