SN54AC74-SP: Propagation Delay Details

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Part Number: SN54AC74-SP
Other Parts Discussed in Thread: SN54HC132-SP, SN54HC32-SP

Team,

The ranges listed for propagation delay on the datasheets of the SN54AC74-SP, the SN54HC32-SP, and the SN54HC132-SP are not quite as detailed as I’d like. Do you have production data you can share with me on these parts?

Thank you.

over 4 years ago

0 Wade Vonbergen over 4 years ago

TI__Guru 62930 points

B.D.,

I am not sure what the customer is looking for. Tighter ranges?

Unfortunately, I do not have any data that would allow tightening the specifications for these devices.

There is a large range for propagation delays. However, the delay between channels is typically less than 1ns for channel to channel skew.

If this answers your question, please click "This Resolved My Issue"
Regards,
Wade

0 NathanDK over 4 years ago in reply to Wade Vonbergen

Prodigy 75 points

Yes, tighter ranges. My issue is that these chips give me the signals going to several gate drivers in a power converter, and large shifts in delays can correspond to changed dead times, leading either to reduced efficiency or to damaged parts.

I understand that you can't change the datasheet, but if you even had information showing change with temperature, or variation within a lot, or anything else more specific and detailed, then we might better understand what headroom to leave in design and what controls to implement in manufacturing.

0 Wade Vonbergen over 4 years ago in reply to NathanDK

TI__Guru 62930 points

I was able to check on a few other sources, and unfortunately due to the age of the device we do not have any additional sufficient data to tighten the distributions.

Regards,

Wade

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SN54AC74-SP: Propagation Delay Details