74HC4060

[Moist]

Hi everyone,

I would like to know if there really is a Schmidth trigger inverter (or
whatever gate) in this chip just before driving the clock of the internal
flip-flops. I assume yes otherwise the chip would be unstable at low
oscillator frequencies with slow rise/fall times.
But... the datashet I got says nothing about this.

Thanks!

MOiSt

 

[Tim Auton]

"Moist" <a@b.com> wrote:

I would like to know if there really is a Schmidth trigger inverter

Do, der aare bonly beventh chigger imburpers.


Tim
--
Do you want your computer to trust a software vendor more than you?
http://www.cl.cam.ac.uk/~rja14/tcpa-faq.html

 

[Joe McElvenney]

Hi,

My 1983 RCA CMOS data book shows a Schmitt in the old CD4060B
just before the first counter although Fairchild's data sheet for
the 74HC4060 doesn't -

http://www.fairchildsemi.com/ds/MM/MM74HC4060.pdf

The specified voltage levels on pins 9 & 10 are different to
the rest but don't seem to indicate Schmitt-like action. The
input/oscillator circuitry is also slightly different.

However, the TI sheet does show a Schmitt trigger in the same
place as the '4060B, so may be there is hope for us all yet.

http://focus.ti.com/lit/ds/symlink/sn74hc4060.pdf


Cheers - Joe

 

[Moist]

"Joe McElvenney" <ximac@btinternet.com> a écrit dans le message de news:
VA.00000078.0042ae8e@btinternet.com...

Hi,

My 1983 RCA CMOS data book shows a Schmitt in the old CD4060B
just before the first counter although Fairchild's data sheet for
the 74HC4060 doesn't -

http://www.fairchildsemi.com/ds/MM/MM74HC4060.pdf

The specified voltage levels on pins 9 & 10 are different to
the rest but don't seem to indicate Schmitt-like action. The
input/oscillator circuitry is also slightly different.

However, the TI sheet does show a Schmitt trigger in the same
place as the '4060B, so may be there is hope for us all yet.

http://focus.ti.com/lit/ds/symlink/sn74hc4060.pdf


Cheers - Joe

TI datasheets says it all! There is one Schmitt.
otherwise these chips would not be quite interchangeable...

Thanks!

 

[David Harmon]

On Wed, 6 Oct 2004 14:38:32 +0000 (UTC) in sci.electronics.basics, Joe
McElvenney <ximac@btinternet.com> wrote,

My 1983 RCA CMOS data book shows a Schmitt in the old CD4060B
just before the first counter although Fairchild's data sheet for
the 74HC4060 doesn't -

Who is the current successor to RCA as far as standard CMOS logic is
concerned?