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Texas Instruments
74HC21 Series
SN74HC21DR
Documents Deep Dive
SNx4HC21 Dual 4-Input AND Gates datasheet (Rev. F)
Implications of Slow or Floating CMOS Inputs (Rev. E)
Designing With Logic (Rev. C)
Signal Switch Data Book (Rev. A)
Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc
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