Part Number: SN74CBTLV3125
I have one question about SN74CBTLV3125.
What is the minimum voltage of VIL? Does it mean if voltage is <0.8V, the output is ensured LOW?
Only maximum value is marked in datasheet.
The minimum voltage allowed on the OE pin is 0 V.
If the voltage on the control logic OE pin is <0.8V it will be recognized by the device as receiving a logic low signal. The device will respond based on the truth table and turn on the A to B path.
The opposite is true for the Vih. When the voltage on the OE pin is > 2 V the device will receive a logic high signal and respond based on the truth table turning off the A to B path making it Hi-Z.
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In reply to Adam Torma:
Thanks for reply.
How about the risk if A port minimum voltage is -0.3V? Will it influence the logic output at B port?
Adam, What is the minimum voltage allowed on A and B path?
I notice it rail-to-rail switching on Data I/O ports,so does it mean the Vi range allowed on A and B path is same as the Vcc which is -0.5~4.6V ?
I got a signal which the minimum voltage is -0.4V through the path B,is there any risk on it?
In reply to Johnny Guo:
The SN74CBTLV3125 device doesn't have any drive capability it simply passes a voltage from one side of the switch to the other so the B port could be the input or output depending on where the source and the load is in the system.
I understand the confusion when looking at the older datasheets that doesn't have a recommended operating conditions table but -0.3 V is outside the recommended operating conditions. The recommended operating conditions for this device on the A and B signal path is 0 to Vcc.
There are ESD protection diodes on the A and B I/O path to Vcc and GND. As the voltage on the I/O pins exceed 0 to Vcc the ESD diode will begin to conduct and cause leakage through the diode.
user5774538 does this help with your question as well?
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