Texas Instruments Stellaris ARM Cortex-M3S 800 LM3S812-EQN50-C2, 32-bit MCU, 50 MHz, 64 KB Flash, 8 KB SRAM, 34 I/O, 3.3 V, -40 to 105 °C, 48-LQFP Tray.
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 800 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 3V ~ 3.6V |
| Operating temperature | -40°C~105°C(TA) |
| Speed | 50MHz |
| Package | Tray |
| RAM size | 8K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Connectivity | I²C, Microwire, SPI, SSI, UART/USART |
| Number of i (O) | 34 |
| Core processor | ARM® Cortex®-M3 |
| Case | 48-LQFP |
| Data converters | A/D 2x10b |
| Program memory size | 64KB (64K x 8) |
The LM3S812-EQN50-C2 is a 32-bit ARM Cortex-M3 MCU from the Stellaris family, clocked at 50 MHz with 64 KB of Flash and 8 KB of SRAM. It packs 34 general-purpose I/O lines, a 2-channel 10-bit ADC, and serial connectivity including I²C, SPI, SSI, Microwire, and UART/USART.
Yes, the LM3S812-EQN50-C2 is obsolete. No further factory production is planned. The part is available only through surplus and independent distributor channels, sourced to order against an RFQ.
Texas Instruments has not published an official direct replacement for the LM3S812-EQN50-C2. For a pin-compatible alternative within the Stellaris family, evaluate the LM3S811 or other LM3S8xx variants, but verify memory size, peripheral set, and availability against your firmware and BOM requirements. No guaranteed drop-in substitute is listed.
The LM3S812-EQN50-C2 runs at 50 MHz. That clock rate sets the timing margin for control loops, UART baud rate generation, and SPI transaction throughput in your design.