SN74AXC4T774: Propagation skew

Bill Whitehead1

Part Number: SN74AXC4T774
Other Parts Discussed in Thread: SN74AXC8T245

My application is very skew sensitive. I don't see any skew measurements or specifications. I see that the propagation delay is dependent upon voltage levels and temperature, which makes sense. I would assume that the four channels should track closely to each other. Is that a valid assumption?

over 4 years ago

0 Clemens Ladisch over 4 years ago

Guru 244220 points

TI guarantees < 1 ns.

The AXC application report measured 127 ps for the very similar SN74AXC8T245.

0 ShreyasRao over 4 years ago

TI__Guru 56100 points

Hey Bill,

what is the requirement for the output skew in your application?

These general purpose translators provide good skew performance for most of the industrial interfaces. The RGMII application requires 500ps skew and this device family performance exceeds the requirement as mentioned by Clemens.

0 Bill Whitehead1 over 4 years ago in reply to Clemens Ladisch

Prodigy 20 points

That is helpful. This should allow me to close my analysis on the interface. Thanks!

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SN74AXC4T774: Propagation skew