SN65HVDA540-Q1 Power Up/down sequence

Ryuuichi machida

Guru 11745 points

Other Parts Discussed in Thread: SN65HVDA540-Q1

Hi Expert,

I confirmed datasheet of "SN65HVDA540-Q1".

According to this datasheet, user can input 3.3V to VIO and 5V to Vcc.

(Please refer to figure 16 Typical Application Using 3.3-V I/O Voltage Level and Low-Power Mode)

So, the question is

Could you please confirm whether there is any restriction at powering up / down ?

(Ex, 3.3V should be ramped up before 5V is ramped up. etc..)

Best Regards,

Machida

over 9 years ago

0 Miguel Robertson over 9 years ago

TI__Guru 62910 points

Hello Machida-san,

There isn't a particular sequence that is required when powering up the 3.3-V and 5-V rails of SN65HVDA540-Q1. You would just need to make sure that both rails are fully powered whenever the device is operating. There are undervoltage detection circuits on each rail, and below each rail's threshold (nominally 3.6 V for VCC and 2.5 V for VIO) the device will enter standby mode.

Best regards,
Max

0 Ryuuichi machida over 8 years ago in reply to Miguel Robertson

Guru 11745 points

Hi Max-san,

Thank you for your reply.

I understood and will close this thread.

Best Regards,

Machida

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SN65HVDA540-Q1 Power Up/down sequence