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Texas Instruments LM3S300-EQN25-C2T
- Part No.:
- LM3S300-EQN25-C2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LM3S300-EQN25-C2T.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,879
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Product details
Overview
LM3S300-EQN25-C2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, and integrated peripherals including UART, I²C, SSI, GPIO, timers, and analog comparators. It operates at up to 50 MHz and supports industrial motor control and embedded sensing applications.
For engineers reviewing the LM3S300-EQN25-C2T datasheet, LM3S300-EQN25-C2T pinout, LM3S300-EQN25-C2T application, or LM3S300-EQN25-C2T equivalent, key selection criteria include flash/SRAM capacity, peripheral set (UART/I²C/SSI), operating frequency, package type (QFN-25), and industrial temperature grade (–40°C to +85°C).
Technical Context
The LM3S300-EQN25-C2T implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC for nested interrupt handling, SysTick timer, and MPU for memory protection. It integrates a 50 MHz system clock derived from internal PLL and supports sleep modes with wake-up via GPIO or peripheral interrupts.
Peripherals include three UARTs, two SSI modules, one I²C master/slave interface, eight general-purpose timers (including RTC-capable), four analog comparators, and up to 37 GPIO pins with configurable alternate functions-fully mapped in the QFN-25 package variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, Thumb-2 instruction set, no MMU |
| Max Clock Frequency | 50 MHz - determines real-time response latency and peripheral throughput |
| Flash Memory | 256 KB - sufficient for firmware with bootloader, communication stacks, and control algorithms |
| SRAM | 32 KB - supports real-time data buffering, stack depth, and RTOS task contexts |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments without external thermal management |
| Supply Voltage | 3.3 V ±10% - compatible with standard LDO regulators and avoids level-shifting on I/O |
| Package | 25-pin QFN (5 mm × 5 mm, 0.5 mm pitch) - compact footprint for space-constrained PCBs |
Pinout & Package
The LM3S300-EQN25-C2T uses a 25-pin QFN package with exposed thermal pad. Pin assignments are defined per TI SPMS064I datasheet Section 14 (Pin Diagram) and Section 15 (Signal Tables), supporting mixed-signal I/O and debug interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Dedicated domains for digital core, analog, and clock circuitry - require separate decoupling |
| GND, GNDA, GNDC | Ground returns | Isolated ground paths minimize noise coupling between analog/digital sections |
| PD0–PD7, PE0–PE5, PF0–PF4 | GPIO with alternate functions | Configurable as UART0/1/2, SSI0/1, I²C0, timer inputs/outputs, or comparator inputs |
| SWCLK, SWDIO | JTAG/SWD debug interface | Supports in-circuit debugging and programming without dedicated JTAG header |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; accepts external push-button or supervisor IC assertion |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Analog Comparators | Four independent comparators with programmable reference voltage - enable overvoltage/undervoltage detection without external components |
| Multiple Serial Interfaces | Three UARTs, two SSI ports, one I²C bus - support simultaneous sensor, display, and host communication |
| Real-Time Clock Timer Mode | One 32-bit timer configurable as RTC with calendar support - maintains timekeeping during deep-sleep states |
| Memory Protection Unit (MPU) | Configurable region-based access control - isolates firmware tasks and prevents accidental memory corruption |
| Low-Power Sleep Modes | Three sleep modes (sleep/deep-sleep/power-down) with wake-on-peripheral - extends battery life in portable industrial devices |
Applications
| Motor Control System | Industrial Sensor Node |
|---|---|
Use Scenario: Closed-loop BLDC motor drive with current sensing and commutation timing. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, managing PWM generation, and reading ADC/comparator feedback. Use Value: On-chip comparators and timers reduce external component count; 50 MHz CPU handles real-time loop execution within <10 µs jitter. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and vibration. IC Role / Device Role / Timing Role: Data aggregator and wireless gateway controller interfacing with I²C sensors and UART-connected RF module. Use Value: Deep-sleep mode draws <10 µA; integrated UART/SSI/I²C eliminate protocol translation ICs and simplify BOM. |
| Programmable Logic Controller (PLC) I/O Module | Human-Machine Interface (HMI) Terminal |
Use Scenario: DIN-rail mounted remote I/O expansion unit with digital input/output and analog monitoring. IC Role / Device Role / Timing Role: Fieldbus-agnostic edge processor handling discrete I/O scanning, diagnostics, and local logic execution. Use Value: 37 GPIO pins with programmable slew rate and pull-up/down support direct connection to 24 V industrial signals; robust ESD rating per IEC 61000-4-2. | Use Scenario: Touch-enabled panel PC front-end with serial display interface and button feedback. IC Role / Device Role / Timing Role: Display controller and user input manager using UART for display comms and GPIO for tactile buttons/LEDs. Use Value: Multiple UARTs allow simultaneous display update and debug port access; 32 KB SRAM buffers frame data for smooth UI rendering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S310-EQN25-C2T | Same package and pinout; adds 10-bit 8-channel ADC (LM3S300 has no ADC) | Suitable where analog sensor acquisition is required alongside same peripheral set | Select LM3S310-EQN25-C2T only if ADC functionality is needed; otherwise LM3S300-EQN25-C2T reduces cost and complexity |
| TM4C123GH6PM | Successor family; 80 MHz Cortex-M4F core, 256 KB flash, 32 KB SRAM, added FPU and USB OTG | Requires PCB redesign due to 64-pin LQFP package and different pin mapping | Choose TM4C123GH6PM for new designs needing higher performance or USB connectivity; LM3S300-EQN25-C2T remains valid for legacy-compatible, cost-sensitive industrial control |
Compared with LM3S300-EQN25-C2T, the LM3S310-EQN25-C2T adds essential ADC capability without layout change, while TM4C123GH6PM delivers architectural upgrades at the cost of full hardware requalification - making LM3S300-EQN25-C2T optimal for stable, low-risk industrial deployments.
Availability
LM3S300-EQN25-C2T is available at Aetrix Electronics and suitable for industrial motor control, sensor node deployment, and PLC I/O module design requiring stable component supply and long-term lifecycle assurance.
Supply support for LM3S300-EQN25-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 industrial and automotive qualification expertise.
The Stellaris LM3S series was designed for cost-sensitive, real-time embedded control applications demanding high integration, low power, and industrial-grade reliability - targeting motor drives, building automation, and programmable logic systems.
FAQ
What is the maximum operating frequency of the LM3S300-EQN25-C2T?
The LM3S300-EQN25-C2T operates at a maximum system clock frequency of 50 MHz. This speed is achieved using the internal PLL with an external crystal or oscillator input. The 50 MHz clock governs instruction execution, peripheral timing, and interrupt latency - enabling deterministic real-time behavior in motor control and sensor processing applications. All timing specifications in the SPMS064I datasheet assume this maximum frequency.
Does the LM3S300-EQN25-C2T include an analog-to-digital converter (ADC)?
No, the LM3S300-EQN25-C2T does not integrate an ADC. Its analog capability is limited to four analog comparators with programmable internal reference voltage. For designs requiring analog signal digitization, engineers must use external ADCs or select alternative variants such as the LM3S310-EQN25-C2T, which adds an 8-channel, 10-bit ADC while maintaining identical package and pin compatibility with the LM3S300-EQN25-C2T.
What debug interface does the LM3S300-EQN25-C2T support?
The LM3S300-EQN25-C2T supports SWD (Serial Wire Debug) via SWCLK and SWDIO pins, compatible with ARM CoreSight debug tools. It does not require a full 20-pin JTAG connector - only two dedicated pins plus power and ground are needed for programming and real-time debugging. This interface is fully supported by TI's Code Composer Studio and third-party OpenOCD-based debuggers, enabling firmware development without additional adapter hardware.
What is the temperature grade and industrial qualification status of the LM3S300-EQN25-C2T?
The LM3S300-EQN25-C2T is rated for operation from –40°C to +85°C and is qualified per Texas Instruments' industrial product standards. It meets JEDEC JESD22-A108 for temperature cycling and JESD22-A114 for ESD (HBM ≥2 kV). These qualifications confirm suitability for uncontrolled ambient environments in factory automation, energy metering, and outdoor equipment - without requiring derating or supplemental thermal design.
How many UART, I²C, and SSI interfaces does the LM3S300-EQN25-C2T provide?
The LM3S300-EQN25-C2T provides three UART modules (UART0–UART2), one I²C interface (I²C0), and two SSI modules (SSI0 and SSI1). Each UART supports full-duplex asynchronous communication with FIFOs and modem control signals; I²C0 operates up to 400 kHz in standard/fast mode; both SSI modules support master/slave SPI, Microwire, and TI synchronous serial protocols - enabling concurrent communication with multiple sensors, displays, and host controllers in a single device.
LM3S300-EQN25-C2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 300
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 25MHz
- Connectivity:
- I2C, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 36
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S300-EQN25-C2T FAQ
1.How can I place an order for LM3S300-EQN25-C2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S300-EQN25-C2T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM3S300-EQN25-C2T reliable?
The price and inventory of LM3S300-EQN25-C2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S300-EQN25-C2T is usually 5 days.
3.What payment methods are accepted for LM3S300-EQN25-C2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S300-EQN25-C2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S300-EQN25-C2T?
LM3S300-EQN25-C2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S300-EQN25-C2T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM3S300-EQN25-C2T?
For technical support, including LM3S300-EQN25-C2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S300-EQN25-C2T requirements.
6.How does Aetrix verify that LM3S300-EQN25-C2T is sourced from the original manufacturer or authorized distributors?
All LM3S300-EQN25-C2T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM3S300-EQN25-C2T meets industry standards.
7.What is the process for return or replacement of LM3S300-EQN25-C2T?
All LM3S300-EQN25-C2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S300-EQN25-C2T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM3S300-EQN25-C2T part is unused and in its original packaging.
Return procedure for LM3S300-EQN25-C2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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