Texas Instruments LM3S808-IGZ50-C2

Overview

LM3S808-IGZ50-C2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 64 KB flash, 24 KB SRAM, integrated 10-bit ADC (8-channel), dual UARTs, I²C, SSI, and PWM-capable timers. It operates at up to 50 MHz and targets motor control, industrial sensing, and embedded HMI applications requiring real-time responsiveness and mixed-signal integration.

For engineers reviewing the LM3S808-IGZ50-C2 datasheet, LM3S808-IGZ50-C2 pinout, LM3S808-IGZ50-C2 application, or LM3S808-IGZ50-C2 equivalent, key selection criteria include its 50 MHz CPU clock, 8-channel ADC sampling rate of 1 MSPS, GPIO interrupt capability per pin, integrated watchdog timer, and QFP-100 package compatibility with legacy Stellaris designs.

Technical Context

The LM3S808-IGZ50-C2 implements the ARMv7-M architecture with NVIC supporting 48 configurable interrupts and priority grouping. Its memory subsystem includes 64 KB on-chip flash with 128-byte erase sectors and 24 KB SRAM with zero-wait-state access at full speed.

Peripherals are organized into APB buses: one AHB bridge connects core to system peripherals (SysTick, NVIC, MPU), while APB0 and APB1 serve analog (ADC, comparator), serial (UART, I²C, SSI), and timing (GPTM, WDT) modules - all accessible via memory-mapped registers with bit-band aliasing support.

Key Specifications

Pinout & Package

LM3S808-IGZ50-C2 is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm pitch, 14 × 14 mm body size, and exposed thermal pad. Pin assignment follows TI's standardized Stellaris pinout for QFP-100 packages, supporting drop-in compatibility across LM3S8xx family members.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with LM3S808-IGZ50-C2, LM3S811-IGZ50-C2 offers more flash but removes thermal sensing, while TM4C123GH6PM delivers architectural upgrades including FPU and expanded memory - both require minor firmware adaptation but share identical pinout and peripheral register layout.

Availability

LM3S808-IGZ50-C2 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and HMI applications requiring stable component supply and long-term obsolescence management.

Supply support for LM3S808-IGZ50-C2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in industrial and automotive-grade microcontrollers.

The Stellaris LM3S series was designed as TI's first ARM-based MCU family targeting cost-sensitive, real-time embedded applications where performance, peripheral integration, and development ecosystem maturity were critical.

FAQ

What is the maximum operating frequency of the LM3S808-IGZ50-C2?

The LM3S808-IGZ50-C2 operates at a maximum system clock frequency of 50 MHz. This speed is achieved using an internal PLL that multiplies the input crystal or oscillator frequency, and it is fully supported across all on-chip peripherals including the ADC, timers, and serial interfaces. The LM3S808-IGZ50-C2 maintains timing compliance under recommended operating conditions (3.0–3.6 V supply, –40°C to +85°C ambient).

Does the LM3S808-IGZ50-C2 include an internal temperature sensor?

No, the LM3S808-IGZ50-C2 does not integrate an internal temperature sensor. While some members of the LM3S8xx family (e.g., LM3S811) include this feature, the LM3S808-IGZ50-C2 datasheet explicitly omits it from the analog peripheral list. Temperature monitoring must be implemented externally using discrete sensors or ADC-measured bias voltages if required in the LM3S808-IGZ50-C2 design.

What debug interfaces are supported by the LM3S808-IGZ50-C2?

The LM3S808-IGZ50-C2 supports JTAG and Serial Wire Debug (SWD) interfaces through dedicated pins (TCK, TMS, TDI, TDO, and nTRST). These interfaces enable full-featured debugging, flash programming, and boundary scan testing using standard TI tools such as IAR Embedded Workbench, Keil MDK, or TI's Code Composer Studio. The LM3S808-IGZ50-C2 implements ARM CoreSight-compliant debug architecture.

Is the LM3S808-IGZ50-C2 pin-compatible with other LM3S8xx variants?

Yes, the LM3S808-IGZ50-C2 is pin-compatible with other LM3S8xx microcontrollers in the same QFP-100 package, including LM3S811 and LM3S812. Pin assignments for power, ground, GPIO, and peripheral signals are identical across these variants, enabling hardware reuse and firmware migration within the same package footprint. The LM3S808-IGZ50-C2 shares register-level compatibility for all common peripherals.

What is the flash endurance specification for the LM3S808-IGZ50-C2?

The LM3S808-IGZ50-C2 flash memory is rated for a minimum of 10,000 write/erase cycles per sector, as specified in the official Texas Instruments production data sheet. Each 128-byte sector can be independently erased, and program operations occur in byte, half-word, or word increments. The LM3S808-IGZ50-C2 supports in-application programming (IAP) with proper sequence control and flash protection bit management.