Automotive Logic Output Protection

[Rerouter]

I'm in the process of making a in circuit diagnostic tool, that uses a bank of 1.8-5V logic outputs and inputs, Now the inputs i have covered pretty easy,

But i'm a bit stuck on finding a magic do it all buffer that can output those logic levels, and also be protected against +-32V on all outputs (E.g. if output voltage exceeded go high impedance)
Output drive specs would be 1.8-5V logic with 8-15mA sink / source.

Ideally I'd like it to survive being hooked up back to front across a truck battery, (how the previous model died)

[Rerouter]

sorry but the jfet option looks to drop too much voltage to be any use here,

I did start to find the keywords i was looking for, e.g.  https://www.maximintegrated.com/en/products/interface/circuit-protection/MAX4505.html

His maximum on resistance is still a little high for my liking, but its a start in the right direction,

Hmm another case of always read the datasheet carefully, minimum single supply voltage is 9V,

[Rerouter]

Ok furthur looking has found better options with analog devices, looks like the 9V minimum is pretty fixed, (and there is a quirk where the positive trigger has to be between VCC and VCC-4.5V, Which means a charge pump splitting 5V to +-5V makes an ideal solution, low RSon, and a wide protection range,

I'll leave this up for any who come later,