MAX3232: Driving capability of MAX3232

Wesley Huang

Expert 1030 points

Part Number: MAX3232

HI Team,

Which spec in the datasheet is related to the driving capability of MAX3232?

I didn't find the spec such as: maximum output current, maximum drive current and so on in the datasheet of MAX3232.

Best regards

Zhihong Huangs

over 5 years ago

0 Miguel Robertson over 5 years ago

TI__Guru 62920 points

HI Zhihong,

This is best specified by the minimum VOH/VOL specifications, which are given in Section 6.6 for a worst-case RS-232 load condition of 3 kOhm. You can see how these voltages vary with load current for a typical device by referencing Figures 1 and 2. Please let me know if this is unclear or if you have further questions.

Regards,
Max

0 Wesley Huang over 5 years ago in reply to Miguel Robertson

Expert 1030 points

HI Max,

Thanks for your reply.

1. Why does the output current change with the VOH? how does the output of the driver in MAX3232 work when the VOH changes ?

Best regards

Zhihong Huangs

0 Miguel Robertson over 5 years ago in reply to Wesley Huang

TI__Guru 62920 points

Hello,

You could actually think of it the other way - i.e., the voltage reduces as the load current increases. This is due to the non-zero output impedance of the driver circuit.

Max

0 Wesley Huang over 5 years ago in reply to Miguel Robertson

Expert 1030 points

HI Max,

Get this.

Thanks for your reply.

Best regards

Zhihong Huangs

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MAX3232: Driving capability of MAX3232