SN74LVC8T245 tr/tf of output

S.Satoshi

Guru 21675 points

Other Parts Discussed in Thread: SN74LVC8T245

Hi,

Can we have some reference value of tr/tf of output signal for SN74LVC8T245?

It should be OK with the condition of test circuit in datasheet and should not be guaranteed value.

Best Regards,

over 11 years ago

0 Chris Cockrill over 11 years ago

TI__Mastermind 46480 points

The output rise and fall times depend on the VCC and the output load. They will vary accordingly.

LVC device will have approximately a 2ns rise and fall time at 3.3V into a 30pf /500ohm load. If you are driving a typical Cmos input the rise and fall will be faster. approximately 1ns.

0 S.Satoshi over 11 years ago in reply to Chris Cockrill

Guru 21675 points

Hi Chris-san,

Thank you for your information.

As you said the output rise and fall time will vary depend on Vcc and the output load, but the reference value you provided will be helpful for customer.

Best Regards,

Sonoki

0 Mark Liang over 8 years ago in reply to Chris Cockrill

Intellectual 740 points

Hi Chris,

If the load is a TTL input, VccB=5V, VccA=2.5V, data is from A port to B port, what tr/tf should be?

Best,

Mark

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SN74LVC8T245 tr/tf of output