A while ago I got a Stellaris Launchpad for the new LM4F120 MCU but did not get around to trying it out.

When I now tried accessing any information on the LM4F120 series at TI, anything related to it seems to have disappeared and old links are redirected to the TM4C123 series. I can not even find any datasheets.

What happened? What are the differences to the TM4C123 series? At first glance there does not seem to be any difference.

  • \$\begingroup\$ As far as I can see, they decided to re-brand the series. New micrcontrollers do have some differences. For example, the new Launchpad should have USB On-the-Go and if I remember correctly some new motor control stuff. \$\endgroup\$ – AndrejaKo Jul 15 '13 at 17:21
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    \$\begingroup\$ The mad rush and shoddy way in which the Tiva C replaced the Stellaris reminds me of those weddings which are driven by "oops" circumstances. A lot of people in the community are disappointed with TI about this. \$\endgroup\$ – Anindo Ghosh Jul 15 '13 at 18:47

The Stellaris LM4F120 LaunchPad is still available at the Texas Instruments eStore, but not for long. It is in the process of being replaced by the rebranded "Tiva C" series.

The user manual for the LM4F120 Launchpad evaluation board is still available, as is the StellarisWare software. However, the datasheets for the LM4F120 ARM processors have vanished from the site. The new TM4C123 replacements are apparently not identical.

The new Tiva C LaunchPad is available for pre-order, with 8 to 10 weeks to delivery.

This is probably one of the worst-orchestrated product phase-out / replacement exercises Texas Instruments has ever done - Even the shakiest manufacturers rarely remove the datasheets and other documentation for discontinued or replaced products, and TI has typically been pretty dependable.


"Stellaris LM4F120" has been renamed as "Tiva TM4C1233H6PM" (otherwise they are identical and PCB & SW interchangeable)

All TI Stellaris datasheets and product pages have been removed (!!!). This move is so unbelievable that I surely won't be relying on TI MCUs anytime soon.

See here for a very good reference from TI itself (and very juicy customer opinions on this).


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