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LFSC датащи(PDF) 70 Page - Lattice Semiconductor |
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LFSC датащи(HTML) 70 Page - Lattice Semiconductor |
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70 / 237 page ![]() 3-26 DC and Switching Characteristics Lattice Semiconductor LatticeSC/M Family Data Sheet sysCLOCK DLL Timing Over Recommended Operating Conditions Parameter Description Conditions Min. Typ. Max. Units fIN Input Clock Frequency (CLKI, CLKFB) 100 — 700 MHz fOUTOP Output Clock Frequency (CLKOP) 100 — 700 MHz fOUTOS Output Clock Frequency (CLKOS) 25 — 700 MHz AC Characteristics tDUTY Output Clock Duty Cycle Output Clock Duty Cycle (at 50% levels, 50% duty cycle input clock, duty cycle correction turned off, time reference delay mode) 38—62 % tDUTYRD Output Clock Duty Cycle Output Clock Duty Cycle (at 50% levels, arbitrary duty cycle input clock, duty cycle correction turned on, time reference delay mode) 45—55 % tDUTYCIR Output Clock Duty Cycle Output Clock Duty Cycle (at 50% levels, arbitrary duty cycle input clock, duty cycle correction turned on, clock injection removal mode) 40—60 % tOPJIT 1 Output Clock Period Jitter — — 200 ps tCPJIT 1 Output Clock Cycle-to-Cycle Jitter — — 200 ps tSKEW Output Clock to Clock Skew (Between Two Outputs with the Same Phase Setting) — — 100 ps tLOCK DLL Lock-in Time 8 — 18500 cycles tIDUTY Input Clock Duty Cycle Applies to all operating conditions 35 — 65 % tIPJIT Input Clock Period Jitter — — +/- 250 ps tHI Input Clock High Time At 80% level 500 — — ps tLO Input Clock Low Time At 20% level 500 — — ps tRSWD Reset Signal Pulse Width 3 — — ns tFDEL Timeshift Delay Step Size 35 45 80 ps tDLL Delay Through the DLL when No Delay Taps are Chosen but Not in Bypass Mode. — 760 — ps 1. Values are measured with FPGA logic active, no additional I/Os toggling and REFCLK total jitter = 30 ps. |
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