PL611-01 Programmable Clock Microchip Technology PL611-01 Programmable Clock IC is a low-cost, general-purpose frequency synthesizer. The PL611-01 product family offers the versatility of using a single Crystal or Reference Clock input and producing up to three different system clocks. The PL611-01 can generate any output frequency up to 200MHz from fundamental crystal input between 10MHz and 30MHz, or a 3rd overtone crystal of up to 75Mhz, or a Reference clock input of up to 200MHz. Cascading of PL611-01 Clock ICs to produce additional clock frequencies is also supported.