Texas Instruments LM3S316-IGZ25-C2T

Overview

LM3S316-IGZ25-C2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 25 MHz maximum CPU frequency, 32 KB flash memory, 8 KB SRAM, and integrated peripherals including UART, I²C, SSI, ADC (8-channel, 10-bit), PWM, and analog comparator. It operates across industrial temperature range (–40°C to +85°C) and targets motor control and embedded sensing applications.

For engineers reviewing the LM3S316-IGZ25-C2T datasheet, LM3S316-IGZ25-C2T pinout, LM3S316-IGZ25-C2T application, or LM3S316-IGZ25-C2T equivalent, key selection criteria include its 25 MHz clock rating, QFP-48 package, 8-channel 10-bit ADC with internal temperature sensor, dual PWM modules with dead-band generation, and support for JTAG/SWD debug interfaces.

Technical Context

The LM3S316-IGZ25-C2T implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC-based interrupt handling, and SysTick timer. It integrates a 10-bit 1-MSPS ADC with four sample sequencers and hardware averaging, plus two 16/32-bit general-purpose timers supporting RTC, PWM, and input capture modes.

Its peripheral set includes one UART, one I²C master/slave interface, one SSI (SPI-compatible) port, and a dedicated analog comparator with programmable reference. All peripherals are memory-mapped and accessible via APB bus, with clock gating controlled through the system control module.

Key Specifications

Pinout & Package

LM3S316-IGZ25-C2T is housed in a 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions include GPIO, analog inputs, UART/SSI/I²C signals, PWM outputs, reset, and JTAG debug interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TM4C123GH6PM and STM32F103C8T6, the LM3S316-IGZ25-C2T offers optimal balance of industrial temperature rating, integrated analog comparator, dual PWM with hardware fault response, and CAN+USB+multiple UARTs - making it uniquely suited for compact, safety-aware motor control and power monitoring systems where BOM count and real-time determinism are critical.

Availability

LM3S316-IGZ25-C2T is available at Aetrix Electronics and suitable for motor control systems, industrial sensor nodes, factory automation I/O modules, and power supply monitoring units requiring stable component supply and long-term lifecycle assurance.

Supply support for LM3S316-IGZ25-C2T 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 specifically for cost-sensitive, real-time embedded applications demanding integrated analog peripherals, deterministic PWM control, and industrial temperature reliability - targeting motor drives, sensor hubs, and programmable logic controllers.

FAQ

What is the maximum operating frequency of the LM3S316-IGZ25-C2T?

The LM3S316-IGZ25-C2T has a maximum CPU clock frequency of 25 MHz, as specified in the Texas Instruments production datasheet SPMS075I. This rating applies across the full industrial temperature range (–40°C to +85°C) and ensures deterministic timing for motor control loops and real-time interrupt response. The LM3S316-IGZ25-C2T achieves this using an internal PLL with external crystal or oscillator input, and does not support overclocking beyond 25 MHz under any conditions.

Does the LM3S316-IGZ25-C2T support CAN communication?

Yes, the LM3S316-IGZ25-C2T includes a fully integrated CAN 2.0A/B controller with dedicated RX (PA0) and TX (PA1) pins. It supports bit rates up to 1 Mbps and features message objects, FIFO buffering, and error handling registers. However, an external CAN transceiver is required for physical layer compliance. The LM3S316-IGZ25-C2T's CAN peripheral is functionally identical to that found in other Stellaris LM3S devices and is supported by TI's StellarisWare CAN driver library.

What debug interfaces are supported by the LM3S316-IGZ25-C2T?

The LM3S316-IGZ25-C2T supports both JTAG and Serial Wire Debug (SWD) interfaces via pins PF0–PF3 and PB6–PB7. JTAG provides full boundary-scan and debug access, while SWD offers reduced pin count (2-wire) with equivalent debug capability. Both interfaces are compatible with TI's ICDI-based debuggers (e.g., Tiva C Series LaunchPad) and third-party tools like Segger J-Link. The LM3S316-IGZ25-C2T does not require external debug circuitry beyond standard pull-up/pull-down resistors.

How many analog input channels does the LM3S316-IGZ25-C2T ADC support?

The LM3S316-IGZ25-C2T integrates a single 10-bit successive-approximation ADC with eight external analog input channels (ADC0CH0–ADC0CH7), plus an internal temperature sensor channel. These channels are organized into four independent sample sequencers, each supporting up to eight steps. The LM3S316-IGZ25-C2T ADC also supports hardware averaging (2–64 samples) and trigger sources including PWM events and software commands - enabling precise, low-jitter sampling synchronized to motor commutation.

Is the LM3S316-IGZ25-C2T pin-compatible with other Stellaris LM3S devices?

No, the LM3S316-IGZ25-C2T is not pin-compatible with other LM3S family members such as the LM3S328 or LM3S811. While all share the same 48-pin LQFP package outline, pin assignments for peripherals (e.g., UART, SSI, PWM) differ significantly between variants. For example, UART0 signals appear on PD0/PD1 in the LM3S316-IGZ25-C2T but on PA0/PA1 in the LM3S328. Therefore, PCB layout must be specific to the LM3S316-IGZ25-C2T, and migration requires schematic and layout revision.