AM26LS31: output damage

NAOKI AOYAMA

Guru 11215 points

Part Number: AM26LS31

Hello,

Our customer use the AM26LS31,using with transceiver IC (SN75176).

The customer connect the AM26LS31 and the SN75176.

When power on, the driver of the SN75176 output high level for a while.

So, the low state output terminal of the AM26LS31 is damaged.

The DS26LS31 has short circuit protection.

Can the DS26LS31 avoid a damage as described above?

I thought the protection effective for only output short (Y and Z)......

Best Regards,

Naoki Aoyama

over 6 years ago

0 Cristian Soltero52 over 6 years ago

TI__Prodigy 240 points

Hello Naoki,

I am hoping to better understand the problem. So do they power on the SN75176 and then see a glitch at the driver output of the AM26LS31 or a glitch at the receiver output of the SN75176 or a glitch at the data lines A and B of the SN75176? Also, by "damaged" do you mean that the part is permanently damaged?

Best Regards,

Cristian Soltero

0 NAOKI AOYAMA over 6 years ago in reply to Cristian Soltero52

Guru 11215 points

Hello Cristian,

Thank you for your reply.
Sorry for my poor explanation.

"Damaged" means the AM26LS31 is permanently damaged.
When the customer power on the SN75176 and the SN75176 output High.
The AM26LS31 output Low same time, so like a collision.
As a result, it occur rush current.

Regards,
Naoki Aoyama

0 Cristian Soltero52 over 6 years ago in reply to NAOKI AOYAMA

TI__Prodigy 240 points

Naoki,

I apologize for the delayed response. With the contention between the two devices as you mentioned, the DS26LS31 would indeed be able to handle it and provide short circuit protection at the output.

Regards,

Cristian Soltero

0 NAOKI AOYAMA over 6 years ago in reply to Cristian Soltero52

Guru 11215 points

Hi Cristian,

Thank you for your reply.
I'll feedback the customer this information.

Thanks,

Naoki Aoyama

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AM26LS31: output damage