SN65DSI84-Q1: Capability of Output current

Ryuuichi machida

Guru 11515 points

Part Number: SN65DSI84-Q1
Other Parts Discussed in Thread: SN65DSI84

Hi,

Let me confirm about below.

* According to datasheet,

There is following spec.

I understand that when IOH is 4mA, VOH never fall below 1.25V.
(Also, when IOL is 4mA, VOL never exceed 0.4V.)

However, I'm not sure capability of output current for Iol and Ioh.
Is it possible to provide capability of output current information ?

Best Regards,

over 6 years ago

0 Dennis Wu over 6 years ago

TI__Intellectual 2915 points

Hi,

What is Ioh you are trying to secure on the load side device?

Dennis

0 Ryuuichi machida over 6 years ago in reply to Dennis Wu

Guru 11515 points

Hi Dennis-san,

Connected device will be MCU.

BR,
Machida

0 Dennis Wu over 6 years ago in reply to Ryuuichi machida

TI__Intellectual 2915 points

Hi Machida-san,

Based on the IBIS model of this device, the typical VOH = 1.25V with IOH = 8.8mA

Regards,
Dennis

0 Ryuuichi machida over 6 years ago in reply to Dennis Wu

Guru 11515 points

Hi Dennis-san,

Thank you for your reply.

Which ibis model did you use ?

I confirmed ibis model of SN65DSI84, but this model have only "pulldown" for SDA.

Below is ibis model which i confirmed.

http://www.ti.com/product/SN65DSI84/toolssoftware

(sllm203.zip file)

Actually, there is "pullup" model for IRQ and ADDR, but it seems that the typical VOH=1.25V with IOH= 49.6mA in case of "ADDR" and typical VOH=1.25V with IOH= 22.5mA in case of "IRQ" (There is no other pins which have "output stage" except LVDS.)

So, I asked which ibis file you used.

Best Regards,

0 Dennis Wu over 6 years ago in reply to Ryuuichi machida

TI__Intellectual 2915 points

Hi Machida-san,

I'm assuming you were asking LVDS output pins (A_YxP/N, B_YxP/N) instead of ADDR and IRQ

You need to select the signal pins below.

Dennis

0 Ryuuichi machida over 6 years ago in reply to Dennis Wu

Guru 11515 points

Hi Dennis-san,

Thank you for your reply.

Sorry for my poor explanation.

What I want to confirm is "SDA". Could you please confirm about this pin ?

Best Regards,

0 Ryuuichi machida over 6 years ago in reply to Ryuuichi machida

Guru 11515 points

Hi Dennis-san,

Could you please send me your status ?

Best regards,

0 Ryuuichi machida over 6 years ago in reply to Ryuuichi machida

Guru 11515 points

Hi Dennis-san,

I'm sorry I mis-understood about SDA.
Only this pin is open-drain in case of output (different from ADDR and IRQ), so since this pin is not drive high level output, so I understood "pullup" is not defined.

I will close this thread.

BR,

0 Dennis Wu over 6 years ago in reply to Ryuuichi machida

TI__Intellectual 2915 points

Hi Machida-san,

Thank you for the confirmation.

Yes, SDA is the Local I2C interface data pin instead.

Regards,
Dennis

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SN65DSI84-Q1: Capability of Output current