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3.5 CMOS/TTL Interfacing

TTL. CMOS. Return. Next. 3.5 CMOS/TTL Interfacing. There are several factors to consider in TTL/CMOS interfacing, the first is noise margin; the next factor is fanout; the last factor is capacitive loading. For example : HC or HCT driving TTL.

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3.5 CMOS/TTL Interfacing

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  1. TTL CMOS Return Next 3.5 CMOS/TTL Interfacing • There are several factors to consider in TTL/CMOS interfacing, the first is noise margin; the next factor is fanout; the last factor is capacitive loading. • For example : HC or HCT driving TTL Considering fanout, an HC or HCT output can drive 10 LS or only 2 S-TTL inputs.

  2. TTL CMOS VDD RP TTL CMOS Return Back 3.5 CMOS/TTL Interfacing • TTL driving HC or VHC TTL can’t drive HC or VHC directly. RP=(3-5)K.

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