Infineon AURIX SAK-TC Series — A Procurement and Selection Guide for Automotive MCUs

Why AURIX SAK-TC matters for automotive sourcing #

Infineon's AURIX microcontroller family has become a default platform for safety-relevant automotive electronics — engine and transmission control, battery management, chassis and domain controllers, and the zonal architectures now appearing in electric vehicles. For a buyer, the hard part is rarely finding a datasheet. It is matching the right SAK-TC orderable code to a BOM that may have been frozen years ago, decoding Infineon's suffix convention, and confirming automotive qualification, date code and traceability before committing to volume.

The LimChip catalogue currently carries sixteen SAK-TC orderable codes spanning three generations of the Tricore architecture. This guide walks through those generations, explains how to read the suffix, and sets out a practical verification and RFQ checklist for automotive sourcing.

AURIX generations in the LimChip catalogue #

The SAK-TC parts on hand fall into three groups. The oldest is a legacy TriCore device; the rest are first- and second-generation AURIX.

Within TC2xx, the split is clear: TC212L / TC222S are cost-sensitive entry nodes (TQFP-80, 133 MHz), TC233L / TC234L are mid-range body and chassis parts (TQFP-100/144, 200 MHz), and TC275T is the high-performance TC2xx (LQFP-176, 200 MHz) suited to powertrain and safety functions. The TC3xx line is uniformly 300 MHz and shifts to the higher-pin-count LFBGA-292 packages (with the TC364DP on a smaller LQFP-64), reflecting its domain-controller and electrification role.

TC2xx vs TC3xx: what buyers should know #

The two AURIX generations are not interchangeable on performance, even though they share the Tricore instruction set and, at the package level, are designed to be compatible.

• Compute. TC2xx scales to three TriCore cores at up to 200 MHz. TC3xx

moves to the 1.6.2E Tricore, with up to six cores each running 300 MHz and roughly three times the real-time throughput of the previous generation, which matters for multi-sensor fusion, inverter control and domain consolidation.

• Memory. TC3xx raises the embedded flash ceiling to 16 MB and integrates

well over 6 MB of RAM, versus the lower ceilings of TC2xx. For a BOM that is flashing near capacity on a TC2xx, a TC3xx migration is the usual headroom path.

• Safety and security. Both families target ISO 26262 up to ASIL-D, but

TC3xx adds a stronger programmable Hardware Security Module with full EVITA support, plus more lockstep cores — relevant wherever secure onboard communication or OTA updates are in scope.

• Interfaces. TC3xx brings Gigabit Ethernet, more CAN-FD and LIN channels,

and an eMMC interface; TC2xx covers the classic CAN/LIN/inverter set. If your design needs automotive Ethernet or external flash for OTA, TC3xx is the generation to specify.

• Pin compatibility. Infineon designed TC3xx to be compatible with the

TC2xx footprint, which is why a TC3xx can often drop into a TC2xx board with firmware and qualification work rather than a board spin. Treat that as a migration advantage, not a drop-in claim — re-qualification is still required.

A practical rule of thumb: specify TC2xx for stable, cost-driven body, powertrain and safety nodes already proven in production; specify TC3xx for new domain controllers, electrification and ADAS-adjacent designs where bandwidth, security and memory headroom justify the step up.

Reading the SAK-TC suffix #

Infineon orderable codes pack a lot into the string, and the trailing letters are not cosmetic. Taking `SAK-TC233L-32F200F AC` as an example:

• `TC233L` — family and pin/feature tier.
• `32F200` — flash tier and CPU clock (here 200 MHz); the numeric fields

encode the exact flash size, so confirm capacity from the device datasheet rather than guessing from the code.

• `F` before the space and the letters after it — package, temperature and

device-state identifiers that govern fit and steppings.

The trailing pairs in stock (`AC`, `DC`, `AA`, `AB`, `AD`, `AE`) denote device state and stepping. These must match the approved BOM exactly. Swapping `AD` for `AE`, or a different package suffix, can change a qualification, a mask stepping or a temperature grade in ways that are invisible until validation fails. When a requisition lists only a base family, push back for the full orderable code before sourcing.

Package and qualification checks #

Automotive MCUs live or die on qualification, not just part number.

• AEC-Q100 is the baseline stress-qualification for automotive ICs;

confirm the specific grade (temperature range) your application requires.

• ISO 26262 ASIL rating (A–D) must match the safety function. A body

module may be ASIL-B; a braking or steering node is typically ASIL-D.

• Traceability and lot consistency matter more for long-field-life

automotive programs than for many industrial buys. Ask for manufacturer date code, lot documentation and, where relevant, PPAP-level evidence.

• MSL and packaging (tray, tube or reel) should match your line's

handling and placement process, especially for the LFBGA-292 parts.

Stock, date code and RFQ preparation #

The sixteen SAK-TC codes on hand carry recent date codes and multi-thousand quantities, which suits both prototype pulls and production top-ups. Before you release an order:

1. Confirm the exact orderable code, including trailing letters, against the approved BOM. 2. State your acceptable date-code window — automotive programs often constrain how old incoming silicon may be. 3. Specify package and packaging condition (LQFP vs LFBGA, reel vs tray). 4. Note any traceability or qualification documents (CoC, PPAP, AEC-Q / ASIL evidence) the program requires. 5. Give target quantity and destination so lead time and logistics can be confirmed against real stock.

Conclusion #

For automotive MCU sourcing, the SAK-TC family is best approached by generation: TC2xx for proven, cost-driven body, powertrain and safety nodes, and TC3xx for domain controllers, electrification and ADAS-adjacent designs that need more compute, memory, security and automotive-Ethernet bandwidth. The decisive procurement step is not choosing a family but matching the full orderable code — suffix, package and device state — to the qualified BOM, then confirming date code, traceability and packaging before order release. Do that, and the sixteen codes in stock cover most mainstream AURIX sourcing needs without a board respin.

Sources:

• Infineon, AURIX TC3x 32-bit TriCore microcontroller product page (flash up to 16 MB, six TriCore 1.62 cores at 300 MHz, ASIL-D, compatibility with TC2x).
• Infineon press release announcing AURIX TC3xx (October 2016) — up to 6 cores at 300 MHz, ~3× real-time performance vs TC2xx, HSM/EVITA, CAN-FD, Gigabit Ethernet, eMMC.