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VIH overshoot: VIH,max = VDDQ + 1.2V for a pulse width ≤ 3ns, and the pulse width cannot6 [, X0 w8 g* q* `# z
be greater than one-third of the cycle rate. VIL undershoot: VIL,min = –1.2V for a pulse
: ^ ]. ~% Q" w0 f5 p% R1 ?- fwidth ≤3ns, and the pulse width cannot be greater than one-third of the cycle rate.( S; t. z+ P6 x! `, x
O7 [ ]5 b% o7 c- ?: P- m9 s/ ?* B
大家是如何理解这段话的，比如供电电压为3.3V，是不是只要过冲电压小于4.5V，下冲电压大于-1.2V就可以了，我不大理解for a pulse width ≤ 3ns, and the pulse width cannot be greater than one-third of the cycle rate ，这句话是说的啥意思呢？？？ |
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发表于 2012-10-26 18:49
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支持！
反对！