Terminator 3, Terminator Trio

[DeD.]

Apply, the main HEF

[tonemgub]

or this

[DeD.]

The HEF4069 has no protective diodes at the input. Use only HEF!

[tonemgub]

Ok ty bro

[scs]

The actual structure of CD4069.

[kt315]

The HEF4069 has no protective diodes at the input. Use only HEF![ATTACH]42848[/ATTACH]

i think all cmos have protective diodes on input. but they do not showed in your pic.

[DeD.]

Maybe I'm wrong about the diodes, but HEF works better in this scheme than CD and HCF.

[dbanner]

Note: This trick will only work with unbuffered CMOS gates or inverters. That means, for 4000-series chips, the ones with a U suffix, such as 4002UB. For 74 series chips it means ones with a single 'C' in the part number, such as 74C04 (but not 74HC04. It also won't work with Schmitt trigger parts such as 40106UB or 74C14. And it certainly won't work with TTL chips like 74LS04, 7404, 74S04).

[dbanner]

UNBUFFERED CMOS inverters is the key. Otherwise will not work.

[scs]

Еconomy is the mother of misery...

[dbanner]

Classic 3 with tone ID.

[kt315]

Maybe I'm wrong about the diodes, but HEF works better in this scheme than CD and HCF.[ATTACH]42858[/ATTACH]

what is 'better'? better the depth to gold? better the discrimination Ferrous-Non-Ferrous?

[dbanner]

6 of one, half a dozen of the other. HCF is NXP. HEF is STmicroelectonics. CD is Texas instruments. All are same.
It the letters which follows designate variations.

[dbanner]

74HC is high speed CMOS.

[dbanner]

For Trio, use the one followed by UB( UNBUFFERED) ex. CD4069UB