Quad LVDS to LVPECL?

[Andrew Holme]

Does such a chip exist? I can't find it.

MAX9375 or PTN3310 = Single LVDS to LVPECL
tb5d1m = Quad LVTTL to LVPECL
MC10H352-D = Quad CMOS to PECL
sn65lvelt22 = Dual LVTTL to LVPECL
MC100EPT622-D (obsolete) = 10-bit LVTTL to single-ended LVPECL and I only
want single-ended LVPECL to drive 4 data inputs on a MC100EP142

Any suggestions?

TIA

 

[Andrew Holme]

You could use something like a 10EP17, a quad ecl diff-in, diff-out
buffer. Its inputs are (probably...check me on this) LVDS compatible,
and its outputs are ECL.

If your LVDS common-mode voltage is too low to meet the common-mode
input specs of the EP17, you can power it from +3.3 and -2 or
something like that. It's good to 5.5 volts.

John

OnSemi do a MC100LVEL17 which is 3V3 PECL levels.

Their PECL data sheets show internal input pull downs to VEE and talk about
inputs having default states if left open. This sounds like it's OK for the
input to go all the way down to VEE; but then the DC characteristics give
min/max VIH/VIL that are strictly PECL spec. They also have an app note
AN1503-D which gives Spice info including input / output internal schematics
which look like they'd be totally screwed by rail-to-rail inputs.