If you replace the Teensy 4.x it would have to be something very close to the same pinout, foot print, cost and features otherwise it would just be a new product. Ideally you would find a way to source the Teensy directly bypassing Sparkfun.

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ptorrone 13 hours ago | parent [-]

sparkfun is the single source supplier (and now maker of the product).

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jacquesm 11 hours ago | parent | next [-]

Yes, obviously, but they don't make the chips, so can't you just source the exact same chip, make thing pin compatible and call it a day? Then you'd have a drop in replacement, any changes you make will cause disruption for people downstream.

https://www.nxp.com/part/MIMXRT1062DVL6A

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15155 13 hours ago | parent | prev [-]

Spinning an IMXRT1062/IMXRT1064 design sans the terrible Teensy bootloader should take a day or two at most.

These chips have perfectly-fine ROM USB bootloaders and SWD, don't ruin them by adding extra garbage.

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djmips 6 hours ago | parent [-]

The layout of the Teensy 4.x was challenging as I recall with the speeds involved. But maybe you are a demigod of compact high clock designs.

	▲	15155 2 hours ago \| parent [-]
		Nothing on that board is remotely high speed or challenging. USB HS on a board that small is a non issue: it's one measly differential pair with easy impedance requirements.