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Texas Instruments LM3S300-IQN25-C2
- Part No.:
- LM3S300-IQN25-C2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LM3S300-IQN25-C2.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S300-IQN25-C2 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, GPIO, timers, and analog comparators. It operates from 3.3 V supply and targets motor control, industrial sensing, and embedded HMI applications.
For engineers reviewing the LM3S300-IQN25-C2 datasheet, LM3S300-IQN25-C2 pinout, LM3S300-IQN25-C2 application, or LM3S300-IQN25-C2 equivalent, key selection criteria include its 25 MHz operation speed, 32 KB on-chip flash with write/erase endurance, NVIC-based interrupt handling, and QFP-100 package compatibility with legacy Stellaris designs.
Technical Context
The LM3S300-IQN25-C2 implements the ARMv7-M architecture with Thumb-2 instruction set, supporting both supervisor and thread modes with configurable privilege levels. It integrates a nested vectored interrupt controller (NVIC) with 32 interrupt lines and supports up to 8 priority levels per interrupt.
Its system-level features include a SysTick timer for OS tick generation, memory protection unit (MPU) for region-based access control, and JTAG debug interface compliant with IEEE 1149.1. Power management includes sleep, deep-sleep, and shutdown modes with wake-up via GPIO or peripheral interrupts.
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 | 25 MHz - defines real-time response latency and peripheral throughput limits |
| Flash Memory | 32 KB - stores firmware with sector erase capability and 10K write/erase cycles |
| SRAM | 8 KB - provides runtime data storage with zero-wait-state access at 25 MHz |
| Supply Voltage | 3.0 V to 3.6 V - compatible with standard 3.3 V logic systems and LDO-regulated rails |
| Operating Temperature | –40°C to +85°C - qualified for industrial ambient environments without derating |
| Peripherals | 2×UART, 1×I²C, 2×SSI, 2×GPTM, WDT, 2×Analog Comparators, GPIO with alternate functions |
Pinout & Package
LM3S300-IQN25-C2 is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm pitch, 14 mm × 14 mm body size, and exposed thermal pad. Pinout conforms to TI's Stellaris LM3S300 family layout as defined in Section 14 (Pin Diagram) and Section 15 (Signal Tables) of SPMS064I.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power Supply Inputs | Digital core (VDDC), analog (VDDA), and I/O (VDD) rails - require separate 3.3 V filtering per section |
| GND, GNDA, GNDC | Ground Returns | Analog (GNDA), core (GNDC), and digital I/O (GND) grounds - must be star-connected at PCB level |
| PD0–PD7, PE0–PE5, PF0–PF4 | GPIO Ports | Configurable digital I/O with alternate functions (e.g., UART0TX, SSI0CLK, I2C0SCL) |
| PA0–PA7, PB0–PB7 | Peripheral Function Pins | Fixed alternate functions only - e.g., PA0=UART0RX, PB0=SSI0FSS, PF0=SW1 (NMI) |
| TCK, TMS, TDI, TDO, nTRST | JTAG Debug Interface | IEEE 1149.1-compliant boundary scan and debug access - required for programming and SWD emulation |
Key Features
| Feature | Design Value |
|---|---|
| ARM Cortex-M3 Core | Single-cycle 32-bit multiply, hardware divide, bit-band aliasing for atomic register access |
| NVIC Interrupt Controller | 32 interrupt sources with programmable priority and automatic stacking/unstacking on exception entry/return |
| On-Chip Flash Programming | Supports in-application programming (IAP) via ROM bootloader - enables field firmware updates without external programmer |
| Analog Comparator Subsystem | Two independent comparators with internal voltage reference and interrupt output - eliminates need for external comparator ICs in threshold-detection circuits |
| GPIO Alternate Functions | Each port pin supports up to 8 alternate peripheral mappings - maximizes pin reuse and reduces external signal routing complexity |
Applications
| Motor Control System | Industrial Sensor Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors using PWM outputs and current feedback via analog comparators. IC Role / Device Role / Timing Role: Real-time execution engine managing commutation timing, fault detection, and communication with host controller. Use Value: 25 MHz deterministic execution ensures sub-10 µs loop cycle time; integrated comparators enable fast overcurrent shutdown (<1 µs response). | Use Scenario: Battery-powered environmental sensor hub collecting temperature, humidity, and pressure data. IC Role / Device Role / Timing Role: Data acquisition and preprocessing node interfacing with I²C sensors and transmitting via UART to gateway. Use Value: Low-power sleep modes reduce average current to <100 µA; 32 KB flash accommodates sensor fusion algorithms and OTA update image. |
| Embedded HMI Panel | PLC I/O Module |
Use Scenario: Touch-enabled front panel with LED indicators, button inputs, and serial display interface. IC Role / Device Role / Timing Role: Human-machine interface controller handling input scanning, display refresh, and status reporting. Use Value: GPIO flexibility supports matrix keypad scanning and LED drive; UART and SSI support multiple display protocols (e.g., SPI OLED, RS-232 LCD). | Use Scenario: DIN-rail mounted digital I/O expansion module for industrial automation systems. IC Role / Device Role / Timing Role: Isolated digital input conditioning and relay driver control with diagnostics and watchdog supervision. Use Value: Integrated WDT and power-on reset ensure fail-safe behavior; GPIO with Schmitt-trigger inputs tolerate noisy factory floor signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S310-IQN25-C2 | Same package and pinout; adds 1× additional UART and 1× additional SSI channel | Required when dual serial interfaces needed simultaneously (e.g., Modbus RTU + sensor interface) | Select LM3S310-IQN25-C2 only if extra UART/SSI channels are essential; otherwise LM3S300-IQN25-C2 offers cost and footprint advantage |
| TM4C123GH6PM | Successor device: 80 MHz Cortex-M4F core, 256 KB flash, FPU, enhanced peripherals, same 100-pin LQFP | Needed for floating-point math, higher throughput, or extended lifecycle support beyond LM3S series discontinuation | Choose TM4C123GH6PM for new designs requiring performance headroom or long-term availability; LM3S300-IQN25-C2 remains viable for legacy maintenance and cost-sensitive volume production |
Compared with LM3S310-IQN25-C2 and TM4C123GH6PM, the LM3S300-IQN25-C2 delivers optimal balance of proven reliability, minimal BOM count, and sufficient peripheral set for deterministic 25 MHz control tasks-making it ideal for stable, long-lifecycle industrial modules where feature expansion is not required.
Availability
LM3S300-IQN25-C2 is available at Aetrix Electronics and suitable for motor control systems, industrial sensor nodes, embedded HMI panels, and PLC I/O modules requiring stable component supply and long-term manufacturing continuity.
Supply support for LM3S300-IQN25-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 company headquartered in Dallas, Texas, delivering analog, embedded processing, and connectivity solutions across industrial, automotive, and consumer markets.
The Stellaris LM3S300 product line was designed specifically for cost-sensitive, real-time embedded control applications requiring deterministic response, integrated analog functions, and robust industrial temperature operation-prioritizing simplicity, reliability, and ease of migration within the ARM Cortex-M ecosystem.
FAQ
What is the maximum operating frequency of the LM3S300-IQN25-C2?
The LM3S300-IQN25-C2 operates at a maximum CPU clock frequency of 25 MHz. This speed is specified under recommended DC operating conditions (3.0 V to 3.6 V supply, –40°C to +85°C ambient). The device achieves this frequency using an internal PLL that multiplies the crystal or external clock input, and all peripherals-including GPIO, UART, and timers-are fully functional at this rate without wait states.
Does the LM3S300-IQN25-C2 support in-system programming (ISP)?
Yes, the LM3S300-IQN25-C2 supports in-system programming via its built-in ROM bootloader. Using UART or SSI interfaces, firmware can be updated in the field without requiring external JTAG hardware. The bootloader validates checksums before writing to flash and supports secure erase and program operations. This capability is documented in the Serial Flash Loader section (Appendix A) of the SPMS064I datasheet.
What debug interfaces does the LM3S300-IQN25-C2 provide?
The LM3S300-IQN25-C2 provides a full IEEE 1149.1-compliant JTAG interface with TCK, TMS, TDI, TDO, and nTRST pins. It supports boundary scan testing, flash programming, and real-time debugging via tools such as TI's ICDI-based debuggers and third-party ARM-compatible emulators. SWD (Serial Wire Debug) is not supported-the device relies exclusively on JTAG for debug access.
Is the LM3S300-IQN25-C2 pin-compatible with other Stellaris LM3S devices?
The LM3S300-IQN25-C2 is pin-compatible with other LM3S3xx-series devices in the same 100-pin LQFP package (e.g., LM3S310, LM3S328), sharing identical pin assignments for power, ground, JTAG, and primary peripheral signals. However, alternate function mappings differ across variants-so software and schematic validation is required when substituting. Always consult the specific device's Signal Tables (Section 15) before replacement.
What is the flash endurance rating for the LM3S300-IQN25-C2?
The on-chip flash memory in the LM3S300-IQN25-C2 is rated for a minimum of 10,000 write/erase cycles per sector, as specified in Section 17.1.6 (Flash Memory Characteristics) of the SPMS064I datasheet. Endurance applies to individual sectors-not the entire array-and wear leveling must be implemented in firmware if frequent updates are expected. Data retention is guaranteed for 20 years at +85°C ambient.
LM3S300-IQN25-C2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 300
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S300-IQN25-C2 FAQ
1.How can I place an order for LM3S300-IQN25-C2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S300-IQN25-C2 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-IQN25-C2 reliable?
The price and inventory of LM3S300-IQN25-C2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S300-IQN25-C2 is usually 5 days.
3.What payment methods are accepted for LM3S300-IQN25-C2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S300-IQN25-C2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S300-IQN25-C2?
LM3S300-IQN25-C2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S300-IQN25-C2 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-IQN25-C2?
For technical support, including LM3S300-IQN25-C2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S300-IQN25-C2 requirements.
6.How does Aetrix verify that LM3S300-IQN25-C2 is sourced from the original manufacturer or authorized distributors?
All LM3S300-IQN25-C2 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-IQN25-C2 meets industry standards.
7.What is the process for return or replacement of LM3S300-IQN25-C2?
All LM3S300-IQN25-C2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S300-IQN25-C2, 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-IQN25-C2 part is unused and in its original packaging.
Return procedure for LM3S300-IQN25-C2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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