I have a need to multiplex two 3.3V signals with an SPDT function. The power supply available is 2.8V (or, at a push, an unregulated supply from a single cell LiPo, that can drop to 3V), unless I use a boost converter. I would very much like to avoid that if possible.
Does anyone know of a suitable device to achieve this? I did look at another manufacturer's 'beyond the rail' devices, but they pull quite a bit of current (up to 10mA) and include (I presume) some kind of switched mode converter inside.
Thanks a lot for reading.
ADI have a part which may suit your needs. The ADG4613 can pass signals above its rails. The data sheet can be found at the link below.
Using a 3V supply, the part will be able to pass 3.3V.
Because of the complimentary logic, the ADG4613 can be configured as a Dual SPDT by tying the IN1 and IN2 pins to the same digital input. Tying D1 and D2 together will then allow you to have the output of D1+D2 = S1 or S2.
Similarly, you can do the same for IN3, IN4 and D3, D4.
If you have any further questions let me know.