On Fri, Jul 11, 2003 at 06:05:46AM -0800, Martin McCormick enlightened us thusly
> I need to connect one of the reset lines on a 7493 to one or
> another of two outputs on that counter. Are there any TTL or
> TTL compatible chips that resemble the CD4016 in that each switch on
> the chip has an input, output and tristate line to turn the switch
> completely off?
>
> I thought of using a CD4016 for this purpose but I like to
> save those for analog switching and I am not sure it would even work
> properly at 2.4 MHZ which is the clock frequency in the circuit.
>
> In this particular case, I need non-inverting outputs. If
> there is such a device, is there also an inverting version of the same
> thing?
Don't ignore the 4051-3 cmos switches, and the 4066. Many of these may
be available as 74hc4xxx
On a simpler note, there is also things like the 4019(?) which offers
and/or function; there is also a tristateable version (40157? he offers,
trying to think back to 1981).
These may provide the function you require. I dont think 4xxx cmos is
scared off at 2.4 Mhz. I think you can get 5Mhz easily enough, and 10Mhz
has been seen, although you are departing from reality up there
because of the 100ns propagation time. The current is also up.
--
With best Regards,
Declan Moriarty.
--
Author: Declan Moriarty
INET: [EMAIL PROTECTED]
Fat City Network Services -- 858-538-5051 http://www.fatcity.com
San Diego, California -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB CHIPDIR-L
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
