Prescaler/divide-by-2 to 600MHz @ low pwr?

Question

Anyone have suggestions for a simple, small, low-power (e.g. 3.3V @

2mA...) divide-by-two that will go to about 600MHz input? Prefer to go down at least as far as 25MHz input on the low end, and ideally it will operate properly over a 30dB range of input levels, though I'll come up with input signal conditioning if I have to. I could stand a bit higher power if it has a power-down input and responds to power-up within 10usec or so.

Cheers, Tom

Jim Thompson · Accepted Answer

Probably some PECL part you could AC couple to... connect a resistorbetween an input and VBB.		                                        ...Jim Thompson-- | James E.Thompson, CTO                            |    mens     || Analog Innovations, Inc.                         |     et      || Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    || Phoenix, Arizona  85048    Skype: Contacts Only  |             || Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  || E-mail Icon at  |    1962     |  Obama says, "I AM NOT a cry baby, Fox REALLY IS out to get me!"

Tom Bruhns · Answer

=A0 =A0 ...Jim Thompson=A0 =A0| =A0 =A0mens =A0 =A0 |=A0 | =A0 =A0 et =A0 =A0 =A0|=A0|=A0 =A0 =A0 |The (P)ECL parts I've looked at tend to be a bit power-hungry.  TheMC12093 looks pretty good, actually, at typically 3mA and including apower-down feature.  Biggest problem is that it's only spec'd to godown to 100MHz sinewave input.  I can work around that, but things getugly and I'd prefer one of those ideal solutions in one single chip.Cheers,Tom

Prescaler/divide-by-2 to 600MHz @ low pwr?

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