MarkT:
I think that's a CMOS chip with SiGe ECL-style output stage (which is LVDS basically). The low input current
specs make it clear it's not ECL throughout!The speed comes from using SiGe transistors in the output stage...
Isn't that the best of both worlds then? If it achieves those speeds, who cares how it does it. What is interesting to me, not knowing jack about this, is how low the level of integration is. With only one gate or a 2:! mux on a chip, I would think you would have a board of these things before you have implemented something useful (a counter perhaps?) which then adds back a bunch of delays just because of trace lengths. What is this used for? Why did they never implement something like an 8-bit counter, shift register, or D-type flip-flops or something like that?