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APEX20KC 数据表(PDF) 49 Page - Altera Corporation |
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APEX20KC 数据表(HTML) 49 Page - Altera Corporation |
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49 / 90 page ![]() Altera Corporation 49 APEX 20KC Programmable Logic Device Data Sheet Tables 11 and 12 summarize the ClockLock and ClockBoost parameters for APEX 20KC devices. Table 11. APEX 20KC ClockLock & ClockBoost Parameters Note (1) Symbol Parameter Condition Min Typ Max Unit tR Input rise time 5 ns tF Input fall time 5 ns tINDUTY Input duty cycle 40 60 % tINJITTER Input jitter peak-to-peak 2 % of input period % tOUTJITTER RMS jitter on ClockLock or ClockBoost-generated clock 0.35 % of output period % tOUTDUTY Duty cycle for ClockLock or ClockBoost-generated clock 45 55 % tLOCK (2), (3) Time required for ClockLock or ClockBoost to acquire lock 40 µs Table 12. APEX 20KC Clock Input & Output Parameters (Part 1 of 2) Note (1) Symbol Parameter I/O Standard -7 Speed Grade -8 Speed Grade Units Min Max Min Max fVCO (4) Voltage controlled oscillator operating range 200 500 200 500 MHz fCLOCK0 Clock0 PLL output frequency for internal use 1.5 335 1.5 200 MHz fCLOCK1 Clock1 PLL output frequency for internal use 20 335 20 200 MHz fCLOCK0_EXT Output clock frequency for external clock0 output 3.3-V LVTTL (5)(5) (5)(5) MHz 2.5-V LVTTL (5)(5) (5)(5) MHz 1.8-V LVTTL (5)(5) (5)(5) MHz GTL+ (5)(5) (5)(5) MHz SSTL-2 Class I (5)(5) (5)(5) MHz SSTL-2 Class II (5)(5) (5)(5) MHz SSTL-3 Class I (5)(5) (5)(5) MHz SSTL-3 Class II (5)(5) (5)(5) MHz LVDS (5)(5) (5)(5) MHz |
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