XC9572XL High Performance CPLD

Power Estimation

Power dissipation in CPLDs can vary substantially depending on the system frequency, design application and output loading. To help reduce power dissipation, each macrocell in a XC9500XL device may be configured for low-power mode (from the default high-performance mode). In addition, unused product-terms and macrocells are automatically deactivated by the software to further conserve power. For a general estimate of ICC, the following equation may be used:

ICC(mA) = MCHS(0.175*PTHS + 0.345) + MCLP(0.052*PTLP + 0.272) + 0.04 * MCTOG(MCHS +MCLP)* f

This calculation was derived from laboratory measurements of an XC9500XL part filled with 16-bit counters and allowing a single output (the LSB) to be enabled. The actual ICC value varies with the design application and should be verified during normal system operation. Figure 1 shows the above estimation in a graphical form. For a more detailed discussion of power consumption in this device, see Xilinx

Absolute Maximum Ratings(2)

Device Part Marking and Ordering Combination Information

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