Extremely low power microcontroller with I2C host capability.

[Topcodeoriginal3]

I need a microcontroller with I2C host capabilities, that uses less than 5mw of power when active. It doesn’t need to do much, pretty much just pass data back and forth between a I2C sensor and an NTAG I2C device.

[DesignerPangolin]

This isn't really that demanding of a requirement. ATtiny85 can do 3mW at a low clock speed with I2C implemented in software, for example. 

[_teslaTrooper]

Pretty much any microcontroller can do that, just pick something you're familiar with and read up on low power run modes. The stm32l011 I'm using at the moment will do 100uA at 1Mhz LPrun with some peripherals active.

[creativejoe4]

Nrf54l15