CCS/UCD3138: About V33 conditions

user5296461

Intellectual 360 points

Part Number: UCD3138

Tool/software: Code Composer Studio

Please tell me the range of operating voltage of V33.

Also, what kind of behavior does the UCD 3138 perform when the voltage of V33 is 2.9 V or 3.6 V ?

best regards,

over 6 years ago

0 Yitzhak Bolurian over 6 years ago

TI__Mastermind 18370 points

V33(D or A) normal operating range is 3.0 to 3.6 volts.

Outside this range the proper functionality can not be guaranteed.

The Brown-Out voltage is at 2.9V, meaning that at V33 below 2.9V you can get a flag or an interrupt (depending on how the BROWNOUT register is configured.

This comparator flag or interrupt can be used by firmware to halt the operation that might not be safe due to supply under voltage.

Hope this makes sense.

Regards,

0 user5296461 over 6 years ago in reply to Yitzhak Bolurian

Intellectual 360 points

thank you

Is ucd3138 reset if the brownout voltage falls even momentarily?

Is it reset when V33D exceeds 3.6V?

best regards,

0 Yitzhak Bolurian over 6 years ago in reply to user5296461

TI__Mastermind 18370 points

If voltage drops below 2.5V (VGL), then UCD3138 resets.

No reset if supply voltage exceeds 3.6V, but the UCD3138 operating parameters are not guarantied to stay within the defined ranges if supply voltage exceeds 3.6V.

Also at slightly higher voltages you may exceed absolute maximum ratings and cause irreversible damage to the device.

0 Yitzhak Bolurian over 6 years ago in reply to user5296461

TI__Mastermind 18370 points

If the above addresses your question. Please set the status of this post to resolved.
Regards,

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CCS/UCD3138: About V33 conditions