inverting output, or changing logic for battery application

[Moriambar]

Hello. I'm sorry for the obscure title.

Basically I have an RTCC and an LTC2956 which can cause an interrupt in an attiny micro. It's important that they share the pin on the micro. Also: the circuit is battery powered, so I'm concerned about battery life

I thought, originally to use an LTC2956-1 (which has an active HIGH, that gets used elsewhere in the circuit) and OR its output with the one coming from the RTC (a PCA2129). Unfortunately I now see that the PCA has an active low, which makes me panic (I am now stuck with that component). And so I don't know which alternative is best for battery life. These are the alternatives that came to my mind, can you help me out choose or think of another one, please? Here they are:

• Using a not gate attached to the RTC output
• Using an ltc2956-2 which has an active low. Then I have to NOT its output all the time though in the branch that uses it
• Same as the first but using a couple of mosfets

I hope this made sense!

Thanks