We've found a case where we're using the sn74lvc1g3157 outside of the specification and were hoping you could point us at some clarification.
The datasheet calls out a Vin maximum on the IO pins as Vcc +0.5V with a footnote saying "The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed." This specific application is @ VCC 2.5V, ideal use case is 0-3.3V.
Can you help confirm/help detail out potential impact, if any at all.
Phong,
The abs max table gives you clues on the potential impact of placing a voltage on the signal path that is greater than Vcc. There are protection diodes from the signal path to Vcc that will begin to conduct exponentially as the voltage signal path is increasing greater than Vcc. This will cause leakage current from the signal path to Vcc. The excessive leakage must be kept below the I/O port diode current rating of +/- 50mA or you will be at risk of violating the abs max rating.
You can also see more information on your use case in the switches and multiplexers FAQ page.
Thank you,
Adam
