SN74AHC14:入力電流

?? ??

Prodigy 10 points

Part Number: SN74AHC14

Tool/software:

こんにちは

SN74AHC14のSPICEmodelをダウンロードし、シミュレーションを行いました。データシートには入力電流は±1uAと書いてありましたが、シミュレーションを行うと3~5uA程流れていました。こちらの対策などはあるでしょうか。

よろしくお願いします。

2 months ago

0 Albert Xu1 2 months ago

TI__Mastermind 23175 points

Hi,

Please try to stick to questions in English on our E2E forums. This makes it easier to help support in the future as things may be lost when using translation tools.

It seems the issue is the SPICE model has 3-5 uA of input current compared to our 1 uA specified in the datasheet.
Can you share a schematic of your circuit?

0 ?? ?? 2 months ago in reply to Albert Xu1

Prodigy 10 points

I'm sorry,

The content of the question is correct. Thank you for understanding.

This is the schematic I created.

Best regards.

+1 Malcolm Lyn 2 months ago in reply to ?? ??

TI__Genius 17470 points

Hello,

Due to the limitations of SPICE not all parameters will be modeled perfectly correctly. For example, if you look at the internals of this SPICE model you will see that we don't use FETs to model the device but rather voltage dependent voltage sources. Leakage current won't be extremely accurate in cases like this.

Best,

Malcolm

Logic

Logic forum

SN74AHC14:入力電流