🚀 go-pugleaf

Just some brief additions.

In article <634@netxcom.UUCP> jallen@netxcom.UUCP (John Allen) responds:

>
>7400		Original TTL

Slow and lots of power.

>74F00		I dunno

F stands for Fast.  Made by Fairchild, Signetics, and Motorola.  My favorite
choice for speed, power, price, ease of use.

>74ALS00	Advanced Low-Power Schottky, improved noise immunity over LS

Comparable to F-parts, made by TI, so don't trust availablity.

>74AS00		Advanced Schottky

Comparable to ALS, but faster, and needs more power.

>74C00		CMOS

Very low power, slower, sensitive to static discharge, wide range of supply
voltage.

>74HC00		High-Speed CMOS, 'LS' Comparable speed
>74HCT00	High-Speed CMOS, TTL Voltage Compatible
>74H00		High-Speed TTL


>74L00		Low-Power TTL

Slower than original, almost as old.

>74S00		Schottky

Predecessor to LS, AS, ALS. 

>74LS00		Low-Power Schottky
>
>Anyone have a rule of thumb for compatible types, incompatible types?
>

Sure.  Plug them together, and if you don't smell smoke, they work. ;-)
Actually, I don't have a rule a thumb to use.  I look in the spec sheets to
see if the chip doing the driving has (near) equivalent voltage and current
capabilities to that of the receiving chip.

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