Texas Instruments Stellaris® ARM® Cortex®-M3S 5000 series, LM3S5739-IQC50-A0T, 32-bit single-core MCU, 50 MHz, 128 KB Flash, 64 KB SRAM, 61 I/O, CAN/I²C/SPI/USB, 100-LQFP, -40°C to 85°C.
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 5000 |
| Mounting type | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 2.25V ~ 2.75V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 50MHz |
| Package | Tape & Reel (TR) |
| RAM size | 64K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Connectivity | CANbus, I²C, IrDA, Microwire, SPI, SSI, UART/USART, USB |
| Number of i (O) | 61 |
| Core processor | ARM® Cortex®-M3 |
| Case | 100-LQFP |
| Data converters | A/D 8x10b |
| Program memory size | 128KB (128K x 8) |
TI has classified the LM3S5739-IQC50-A0T as Not Recommended for New Designs. No official successor is listed.
100-pin LQFP (14x14 mm body), surface-mount only. The 61 I/O lines fan out to three sides of the package.
Yes, TI lists this part as Not Recommended for New Designs (NRND). It is not formally end-of-life, but TI advises against starting new projects with it. Existing production should plan for a last-time-buy or a replacement.
No official direct replacement is listed. The closest pin-compatible sibling in the Stellaris 5000 family is the LM3S5738, which shares the same 100-LQFP footprint and peripheral set but differs in Flash and SRAM density. Verify memory and feature fit before substituting.
This part is sourced through independent distribution. Submit an RFQ for current availability and pricing — stock levels and market price fluctuate, so a confirmed quote is issued at order time.
The core runs at 50 MHz, typical for an ARM Cortex-M3 in this class. That translates to roughly 62.5 DMIPS, enough for most industrial control and protocol-bridge workloads.
Standard ARM Cortex-M3 toolchains apply — Keil MDK, IAR EWARM, and GCC-based IDEs (e.g. ARM Mbed or Eclipse with GNU ARM). TI's Stellaris ICDI debug probe or any standard JTAG/SWD adapter (J-Link, ST-Link) can program and debug the device.