SN74LVT125-Q1: Maximum Peak Current

user3605066

Part Number: SN74LVT125-Q1
Other Parts Discussed in Thread: UCC21520

Hello,

I am adopting this device for the buffer placed between MCU and UCC21520.

According to the datasheet, the device is specified to have 128 mA and 32 mA for absolute maximum current in the low state and for recommended operating conditions respectively and 64 mA and 32 mA for the high state.

Does this mean that the maximum peak current should be lower than the former values, e.g., 128 mA for the low state and 64 mA for the high state, and the RMS value should be lower than the latter values?

If not, what is the device's capability for the maximum peak sink/source current?

I am trying to identify the series resistance needed to be placed between UCC21520 and this buffer.

Thanks,

Yukihiro

over 3 years ago

0 Emrys Maier over 3 years ago

TI__Guru* 96681 points

Hello Yukihiro-san,

The absolute maximum ratings should never be exceeded, so those are good values to use for calculating your limiting resistor.

0 user3605066 over 3 years ago in reply to Emrys Maier

Prodigy 110 points

Thanks Maier-san,

I understood with the exception of one thing - what happens if the device outputs more than 32 mA, which is the recommended operating condition?

Does it cause any degradation such as lifetime being shortened?

Thanks,

Yukihiro

0 Clemens Ladisch over 3 years ago in reply to user3605066

Guru 266110 points

Exceeding the recommended operating conditions will not immediately damage or degrade the device. But the electrical characteristics are not longer guaranteed; in particular, ±32 mA is the maximum current for which a maximum voltage drop (V_OL, V_CC − V_OH) is specified.

0 user3605066 over 3 years ago in reply to Clemens Ladisch

Prodigy 110 points

Noted and thank you, Ladisch-san.

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SN74LVT125-Q1: Maximum Peak Current