NRND — what that means for your BOM
This part carries a lifecycle status of NRND — Not Recommended for New Designs. That means TI has flagged it for eventual end-of-life, though it has not yet been formally discontinued. For existing production, you can still source it through independent channels, but any new BOM should plan for a migration. There is no official successor listed in the documentation, so a pin-compatible drop-in from TI's current portfolio is not confirmed. If you are supporting a legacy board, the NRND flag means you should secure your remaining volume requirements sooner rather than later — the last-time-buy window may already be closing.
50 MHz core — what it buys you
The 50 MHz ARM Cortex-M3 core delivers a balanced compute-to-power ratio for control applications. It is not a high-throughput DSP engine, but it handles real-time control loops, sensor fusion, and communication protocol stacks without breaking a sweat. The 64 KB SRAM leaves room for moderate data buffering — enough for a UART-to-Ethernet bridge or a motor-control state machine, but not for video or large audio buffers.
Industrial temperature and supply voltage
Rated from -40°C to 85°C, this MCU operates on a supply voltage of 2.25 V to 2.75 V.
Sourcing posture
Because the LM3S1538-IBZ50-A2T is NRND, it is not flowing through standard authorized-distributor channels in volume. We source it through our independent supply network — verified date-code lots, inspected for authenticity. Availability and current pricing are confirmed at quote time against an RFQ. For BOM planning, treat this as a last-time-buy candidate and lock in your lifetime buy quantity early.