MAX3232E-Q1: RS232 recommendation: T1out and R1in pins' withstand voltage need be higher than 40V

Amelie Zheng

Genius 10865 points

Part Number: MAX3232E-Q1

Hi Team,

Do we have RS232 which T1out and R1in pins‘ Withstand voltage could be higher than 40V?

over 3 years ago

0 Max Robertson over 3 years ago

TI__Guru 62910 points

Hi Amelie,

Currently we do not have such a device, although high-voltage short-circuit protection can be implemented externally. An example circuit is given in the below reference design, which was developed for RS-485 but could extend to RS-232 as well:

https://www.ti.com/tool/TIDA-060027

May I ask what application would require 40 V tolerance? Is this to be able to withstand shorts to a battery voltage rail in an automotive system?

Max

0 Amelie Zheng over 3 years ago in reply to Max Robertson

TI__Genius 10865 points

Hi Max,

This is for 24V battery. The interface need to withstand 36V for 1 minute.

0 Max Robertson over 3 years ago in reply to Amelie Zheng

TI__Guru 62910 points

Thank you for the info! We'll keep cases like this in mind for future developments.

Regards,
Max

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MAX3232E-Q1: RS232 recommendation: T1out and R1in pins' withstand voltage need be higher than 40V