Hello,
What isolation level does SN74LVT244B support, Level 0, Level 1, Level 2 or Level 3?
Any compatible devices working at 1.8V power supply?
Best regards,
K.Hirano
Hello Hirano-san,
I believe the isolation level you are referring to comes from the application report Logic in Live-Insertion Applications With a Focus on GTLP
In this application report the levels are defined as:
Level 0 - normal device
Level 1 - Partial power down
Level 2 - Hot insertion
Level 3 - Live insertion
-
For Level 1, a device must include the partial power down feature and specification (Ioff)
For Level 2, a device must include Level 1, the Power-Up 3-State (PU3S) feature and speicfication (Δt/ΔVCC Power-up ramp rate)
For Level 3, a device must include Level 2, the precharged I/O feature and specification (VBIAS pin)
-
Hopefully this has already answered your question, but to be clear, the SN74LT244B includes both Ioff and Power-Up 3-State support, but not Bias VCC, so it is a Level 2 device.
Additionally, it says "Hot Insertion" on the front page, which is the name of the Level 2 isolation.
