MC10EP101 or/nor equivalent, 3.3v / 5v ecl quad 4-input or/nor.
http://onsemi.com MARKING DIAGRAM*
* 250 ps Typical Propagation Delay
* Maximum Frequency > 3 GHz Typical
* PECL Mode Operating Range: VCC = 3.0 V to 5.5 V .
requiring the fastest AC performance available. The 100 Series contains temperature compensation.
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