LSF0101: How to simulate with LSF0101 PSPICE Transient Model in HSPICE

Sanjeev Ghildiyal1

Prodigy 60 points

Part Number: LSF0101
Other Parts Discussed in Thread: TXB0302, TINA-TI

I wish to simulate with LSF0101 PSPICE Transient Model in HSPICE (N-2017.12-SP2).

Please help with the documentation on connectivity and how to feed input stimulus.

Is there a user guide on simulating with their encrypted spice model?

Thanks
Sanjeev G

over 3 years ago

0 ShreyasRao over 3 years ago

TI__Guru 56100 points

Sanjeev,

Pspice model file can run on Cadence Orcad and TINA (possibly) but cant run on Hspice platform.

Only Hspice encrypted / unencrypted models can run on Hspice simulators without issues.

0 Sanjeev Ghildiyal1 over 3 years ago in reply to ShreyasRao

Prodigy 60 points

Hi Shreyas

Thanks for your response. I tried importing LSF0101 spice model in TINA but it was not able to recognize it.

Regards

Sanjeev G

0 Chad Crosby over 3 years ago in reply to Sanjeev Ghildiyal1

TI__Expert 6680 points

Hi Sanjeev,

The PSpice transient model for that device is encrypted and will need to be used with PSpice (pspice.com).

You might try out this model below and see if it works for you:

4760.0741.LSF0101.TSC

Thanks!

Chad Crosby

0 Sanjeev Ghildiyal1 over 3 years ago in reply to Chad Crosby

Prodigy 60 points

Hi Chad

Thanks for sharing the model. I was able to simulate with this. Please find attached foil with simulation result summary.

Please note that for the bus where we need the level translator, there is always a pull down (225Ohms to 650ohms) on the host side.

Can you please confirm if the the results from simulation is correct?

I have an additional request. We wish to check with TI device TXB0302. Can you please help with TINA SPICE model for this device ?

Regards

Sanjeev G

Simulations_2020ww20p3_LSF0101_TI.pptx

0 Chad Crosby over 3 years ago in reply to Sanjeev Ghildiyal1

TI__Expert 6680 points

Hi Sanjeev,

I would highly recommend using the encrypted model along with pspice (there is a free trial for the software) as the model is exceedingly accurate compared to the model I sent for TINA-TI.

That said: the simulations do look correct. The internals of the LSF translator is simply a pass transistor, and thus don't supply any current to the lines. If you could remove the pulldown on the host side, the LSF would best fit for your purpose; however, in the current configuration, the LSF may not be the best fit.

If you're interested to learn more about how the LSF0101 works, you can watch our Logic Minute video series about it here: https://training.ti.com/node/1139264

As for the TXB family of devices: we are unable to provide PSpice models for them at this time.

Thanks!

Chad Crosby

0 Sanjeev Ghildiyal1 over 3 years ago in reply to Chad Crosby

Prodigy 60 points

Hi Chad

Thanks for your response.

Regards

Sanjeev G

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LSF0101: How to simulate with LSF0101 PSPICE Transient Model in HSPICE