I tried searching, but it’s not obvious. I wondered if it would be useful to have a separate thread, just for part supply issues and discussions for alternatives. Hopefully we can then just collate them in one place for future reference.
To kick this off I would like to build one of the latest ESP32 controllers so that I can implement the Canbus with my Victron system. The following parts are missing:
TJA1057GT/3J
TCA9534APWR
TCA6408APWR
CA45-A010M226T
Some of these parts have extremely long backorders (up to a year), which could really put someone off using this system, as they just can’t build it. So any help with either sources, or alternatives would be very much appreciated.
I have searched everywhere on Aliexpress but couldn’t still get CA45-A010M226T. I could get the rest items on https://www.mouser.co.uk and on Aliexpress. Any help would be appreciated. OR any idea if TAJA226M010RNJ can replace CA45-A010M226T
From a very quick read of the datasheet it might be feasible, but stock for it is very limited or simply unavailable. Another option that is 100% compatible is IFX1050GVIOXUMA1, but that is also very hard to source.
If you are not planning to use the can bus you can omit this chip entirely though.
They should be able to deliver mostly populated PCBs. There is a general parts shortage for a few components but there are other sources for them and for the most part they are not too challenging to solder by hand with ~22AWG solder (under 1mm diameter) and a bit of solder wick to pick up any extra solder. Solder paste works as well but will also require solder wick for excess.
Did someone already replaced the RS-485 chip SN65HVD75DR by a MAX3485ESA ?
As far I can see they are pin identical and have compatible electrical specs.
Hover TI claims 20mbps and Maxim only 10mbps.
I cannot get hold on the TI chip, this is the only one missing.
However obtaining IC’s of the shunt design are next level…
I agree they look near identical and very likely will work fine. The difference in maximum data rate is not super critical since the shunt and controller both operate at 19200 today and most other RS485 devices are either 115200 (EPSolar/EPEver) or 9600 (many other inexpensive devices).
C57928. LCSC has nearly 7000 available to ship within a couple days. I highly recommend submitting a batch order with all parts you will need for the controller and shunt if you are opting for both, this will save on shipping costs.
I ordered boards from JLCPCB and had them assembled, there are a couple part swaps necessary (capacitors) as JLCPCB often has stock issues and there are often a few components that can be swapped.
INA228AIDGST - Order direct from TI, most other suppliers seem to be out of stock.
These are the links which I’ve used for sourcing parts for the shunt that were not available from Mouser/DigiKey/LCSC. I was hesitant to order them on AliExpress but I’ve had luck with these suppliers in the past and have been using the above linked parts in the shunt PCBs that I’ve assembled (still have a couple available in the USA).
I’ve tested IFX1050GVIOXUMA1 and can confirm it is a drop in replacement, but it is not available in most places. I have a supply of them on hand as well as TJA1057GT/3 since I use them for other projects as well.
), otherwise switching down to 2MBit might be also ok.