Stratix® and Stratix GX devices have highly versatile phase-locked loops (PLLs) that provide robust clock management and synthesis for on-chip clock management, external system clock management, and high-speed I/O interfaces.
 There are two types of PLLs in each Stratix and Stratix GX device: enhanced PLLs and fast PLLs. Each device has up to four enhanced PLLs, which are feature-rich, general-purpose PLLs supporting advanced capabilities such as external feedback, clock switchover, phase
and delay control, PLL reconfiguration, spread spectrum clocking, and programmable bandwidth.
 There are also up to eight fast PLLs per device, which offer general-purpose clock management with multiplication and phase shifting as well as high-speed outputs to manage the high-speed differential I/O interfaces. The Altera® Quartus® II software enables the PLLs and their features without requiring any external devices.

EP1S10 EP1S20 EP1S25 EP1S30 EP1S40 EP1S60 EP1S80 EP1S10C EP1S10D EP1S25C
EP1S25D EP1S25F EP1S40D EP1S40G

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