Em 21/2/2010 22:19, Isaac Marino Bavaresco escreveu:
> Em 21/2/2010 21:35, Peter van Hoof escreveu:
>   =

>> The 74hct14 is available from Digikey as a dip
>> from several different manufacturers starting at $0.43 in singles
>> and it is in stock
>>
>> The 74HCT family is a special version of 74HC with 74LS TTL-compatible i=
nputs so 74HCT can be safely mixed with 74LS in the same system. In fact 74=
HCT can be used as low-power direct replacements for the older 74LS ICs in =
most circuits. The minor disadvantage of 74HCT is a lower immunity to noise=
, but this is unlikely to be a problem in most situations.
>>
>> Peter van Hoof
>>   =

>>     =

>
> I think he wants the 7414 (no letters in the middle) because of its high
> drive capability. The 74HCT14 output current is just 4mA. I think he
> could use the 74AHCT14, which has a 24mA output current capability.
>
> Best regards,
>
> Isaac
>   =



Sorry, the 74AHCT14 has 8mA output current capabality. The one with 24mA
output current capability is the 74ACT14, but it is not TTL compatible.
Does the OP need TTL levels compatibility?


Regards,

Isaac

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