ZHCSQ37F December 1982 – February 2022 SN54HC4020 , SN74HC4020
PRODUCTION DATA
请参考 PDF 数据表获取器件具体的封装图。
Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tt < 6 ns.
For clock inputs, fmax is measured when the input duty cycle is 50%.
The outputs are measured one at a time with one input transition per measurement.