On Mon, 14 Oct 2002, Dave Tweed wrote:

*>Also-Antal Csaba <antalcs@MAIL.MATAV.HU> wrote:
*>> stgo tgo wrote:
*>> > Do anyone in this Forum know what CMOS/TTL IC I should use for a
*>> > Pre-Scaler that can read a 500MHz Signal at 0~5Vdc ?
*>> > I want to use it for my Frequency Counter with MCU.
*>> > Thanks before,
*>>
*>> Try to use a tv pll synteser, some type is have service output...
*>
*>Specifically, look for the Telefunken (Temic) U666B chip that divides any
*>signal from 30 to 1000 MHz by a factor of 256. It widely used in older TV

It's U664(B), 70 to 1200 MHz afair and it is 'self oscillating' (TFK data
sheet wording). This means that there will be output even if there is no
input. Divides by 64 I think, ECL output (needs preamp to convert to TTL).

Peter

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