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For ACEX® 1K, APEX™ 20K, APEX 20KE, FLEX® 6000, and FLEX 10KE devices, the fastest speed grade is -1.
For APEX 20KC and APEX™ II devices, the fastest speed grade is 7.
For ARM®-based Excalibur™ devices, the fastest speed grade is 1.
For Cyclone™ devices, the fastest speed grade is 6.
For MAX® 3000 devices, the fastest speed grade is -4.
For MAX 7000 devices, the fastest speed grade is -5.
For Mercury™ devices, the fastest speed grade is 5.
For Stratix™ devices, the fastest speed grade is 5.
For Stratix™ GX devices, the fastest speed grade is 6.
APEX 20KC devices with a speed grade of 7 or 8 (for example, EP20K1000C) and APEX 20KE and FLEX 10KE devices with the suffix "X" (for example, EP20K100ETC144-1X devices) include built-in ClockLock® and ClockBoost® phase-locked loop (PLL) circuitry.
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