SN74AVC4T774 - Any leak voltage from pin to pin ?

Kawai

Guru 19775 points

Other Parts Discussed in Thread: SN74AVC4T774

Hello Team,

This is similar question to my previous question in the following URL.
https://e2e.ti.com/support/interface/etc_interface/f/391/p/425052/1519517#1519517

Could you please tell me about below questions ?

[Q1]
Do SN74AVC4T774 may have leak voltage from VCCA to VCCB or to other pins when VCCA is only applied ?

[Q2]
Do SN74AVC4T774 may have leak voltage from VCCB to VCCA or to other pins when VCCB is only applied ?

[Q3]
Do SN74AVC4T774 may have leak voltage from /OE to VCCA/VCCB or to other pins when /OE is only applied ?

I believe there would be no voltage leak from each pin to other pins. For power up sequence, either VCCA or VCCB can be applied first, however, it requires to keep /OE pin High until VCCA and VCCB is fully ramped and stable.

Best Regards,

Kawai

over 7 years ago

0 Nirav Patel over 7 years ago

TI__Expert 6335 points

Kawai,

I will work with design to review the architecture and get back to you. Thanks.

Best Regards,
Nirav

0 Kawai over 7 years ago in reply to Nirav Patel

Guru 19775 points

Hello Nirav-san,

I greatly appreciate for your help. Looking forward to hearing from you soon.

Best Regards,
Kawai

0 Kawai over 7 years ago in reply to Kawai

Guru 19775 points

Hello Nirav-san and Team,

Could we have your update ?

Best Regards,
Kawai

0 Nirav Patel over 7 years ago in reply to Kawai

TI__Expert 6335 points

Takushi,

I have not had a chance to review the architeture. I will try to get you a response by the end of this week.

Best Regards,
Nirav

0 Kawai over 7 years ago in reply to Nirav Patel

Guru 19775 points

Hello Nirav-san,

We need the information ASAP. Customer may replace this device to other product. Could you please give us the information by 5/20 Friday (PST) ?

Best Regards,
Kawai

0 Nirav Patel over 7 years ago in reply to Kawai

TI__Expert 6335 points

Kawai,

I have meetings this AM, but will get you bench results by COB 5/20 (PST).

Best Regards,
Nirav

0 Nirav Patel over 7 years ago in reply to Nirav Patel

TI__Expert 6335 points

Kawai,

I have bench results below. I did not see signigicant voltage leak.

Measured Voltage	Test Cases
Measured Voltage	Case #1: VCCA @ 3.30V	Case #2: VCCB @ 3.30V	Case #3: OE @ 3.30V
DIR1	0.5 mV	0.6 mV	0.5 mV
DIR2	0.5 mV	0.6 mV	0.5 mV
DIR3	0.5 mV	0.6 mV	0.5 mV
DIR4	0.5 mV	0.6 mV	0.5 mV
A1	13 mV	0.7 mV	0.4 mV
A2	13 mV	0.7 mV	0.4 mV
A3	13 mV	0.7 mV	0.4 mV
A4	13 mV	0.7 mV	0.4 mV
B1	1.5 mV	13 mV	0.4 mV
B2	1.5 mV	13 mV	0.4 mV
B3	1.5 mV	13 mV	0.4 mV
B4	1.5 mV	13 mV	0.4 mV
VCCA	3.30V	1.5 mV	0.5 mV
VCCB	1.2 mV	3.30V	0.5 mV
OE	0.5 mV	0.5 mV	3.30V

Best Regards,
Nirav

0 Kawai over 7 years ago in reply to Nirav Patel

Guru 19775 points

Hello Nirav-san,

Thank you very much for your time evaluating with the device.
We understood that the device would no have any significant voltage leaks from each pins.

Best Regards,
Kawai

0 Nirav Patel over 7 years ago in reply to Kawai

TI__Expert 6335 points

Kawai,

Can you tell me more about the opportunity for the SN74AVC4T774 (e.g. customer, application, etc)? If you prefer to discuss offline, we can e-mail instead.

Best Regards,
Nirav

0 Kawai over 7 years ago in reply to Nirav Patel

Guru 19775 points

Hello Nirav-san,

Thanks for your support.

Best Regards,
Kawai

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SN74AVC4T774 - Any leak voltage from pin to pin ?