I am not familiar with an HSTL logic standard. What is that?
HSTL is a technology-independent interface standard for digital integrated circuits. It is a JEDEC standard developed for voltage scalable and technology independent I/O structures. The I/O structures required by this standard are differential amplifier inputs (with one input internally tied to a user-supplied input reference voltage, VREF for single-ended inputs) and outputs using output power supply inputs (VCCO) that may differ from those operating the device itself.
The differential HSTL logic featured on ADI's clocking parts has a common-mode voltage of 0.8 to 0.9V, an 800mV swing, and is normally terminated with 100 ohms across the differential pair.
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