the supply voltage would be +/- 12 V.
The VL should be ok down to 3V but note that the minimum logic high value and using lower VL voltages will affect Ton times and power specs.
The datasheet specification tables were built around a VL of 5V, this would be a typical TLL logic use case.
For your information, here is a link to some measurements showing different VL voltages versus logic high trigger level. The ADG419 is a similar part.
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