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HD74AC Fiches technique(PDF) 35 Page - Hitachi Semiconductor

No de pièce HD74AC
Description  HD74AC Series Common Information
PDF  52 Pages
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Fabricant  HITACHI [Hitachi Semiconductor]
Site Internet  http://www.renesas.com/eng
Logo HITACHI - Hitachi Semiconductor

HD74AC Fiches technique(HTML) 35 Page - Hitachi Semiconductor

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Design Considerations
34
620
620
T1
D2
D3
D1
5.0V
510
T1,T2 - 2SC641 (K)
D1,D2 - HP5082 - 2811
D3 - IN414 OR IN 4148
–5.2V
AC
ECL
Figure 6 Differential Output ECL-to-HD74AC Circuit
It should be understood that for FACT, as with other CMOS technologies, input levels that are between
specified input values will cause both transistors in the CMOS structure to be conducting. This will cause a
low resistive path from the supply rail to ground, increasing the power consumption by several orders of
magnitude. It is important that CMOS inputs are always driven as close as possible to the rail.
Figure 7 Crystal Oscillator Circuit Implemented with FACT HD74AC00



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