My Inquiry
My Account
Texas Instruments LM3S300-EQN25-C2
- Part No.:
- LM3S300-EQN25-C2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LM3S300-EQN25-C2.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,842
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S300-EQN25-C2 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, watchdog, and analog comparators. It operates at up to 50 MHz and supports industrial temperature range (–40°C to +85°C) in a 100-pin LQFP package. It targets real-time embedded control in motor drives and industrial automation.
For engineers reviewing the LM3S300-EQN25-C2 datasheet, LM3S300-EQN25-C2 pinout, LM3S300-EQN25-C2 application, or LM3S300-EQN25-C2 equivalent, key selection criteria include flash/SRAM size, Cortex-M3 core support, peripheral set (UART/I²C/SSI), operating voltage (2.25–2.75 V), and industrial-grade thermal rating.
Technical Context
The LM3S300-EQN25-C2 implements the ARMv7-M architecture with Thumb-2 instruction set, nested vectored interrupt controller (NVIC), and memory protection unit (MPU). It integrates a system timer (SysTick), JTAG debug interface, and clock management with PLL-based system clock generation up to 50 MHz.
Peripherals are memory-mapped and accessed via APB bus; GPIOs support programmable slew rate and drive strength, while UARTs include 16-byte FIFOs and fractional baud-rate generation. The analog comparator provides internal reference selection and interrupt-capable output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, Thumb-2 instruction set, 50 MHz max operation |
| Flash Memory | 256 KB on-chip flash with 128-bit wide interface and 128-byte erase blocks |
| SRAM | 32 KB single-cycle static RAM, zero-wait-state access at full speed |
| Operating Voltage | 2.25 V to 2.75 V - requires external LDO or regulated supply; no internal DC-DC |
| Temperature Range | –40°C to +85°C - qualified for industrial environments, not automotive |
| Package | 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) - RoHS-compliant, lead-free |
| Debug Interface | JTAG with SWD compatibility, 4-bit instruction register, boundary-scan support per IEEE 1149.1 |
Pinout & Package
LM3S300-EQN25-C2 is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with exposed thermal pad, designed for surface-mount reflow assembly and industrial PCB layouts requiring mechanical robustness and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core Power Supply | 2.25–2.75 V main supply for CPU, memory, and digital logic; decoupling required per datasheet layout guidelines |
| GND | Ground Reference | Digital ground plane connection; separate analog/digital ground routing recommended |
| PD0/U0RX | UART0 Receive Input | Primary serial receive pin for UART0; configurable as GPIO or alternate function |
| PD1/U0TX | UART0 Transmit Output | Primary serial transmit pin for UART0; supports 16-byte FIFO and hardware flow control |
| PA0/I2C0SCL | I²C Clock Output/Input | Open-drain SCL line for I²C0 master/slave operation; internal pull-up not enabled by default |
| PA1/I2C0SDA | I²C Data Input/Output | Open-drain SDA line for I²C0; supports standard (100 kbps) and fast (400 kbps) modes |
| PF0/NMI | Non-Maskable Interrupt Input | Edge-triggered NMI input; also serves as GPIO when NMI disabled in system control register |
| TCK | JTAG Test Clock | Asynchronous clock input for JTAG TAP controller; minimum high/low pulse width specified in AC characteristics |
| TMS | JTAG Test Mode Select | Controls JTAG state machine transitions; sampled on TCK rising edge |
| TDO | JTAG Test Data Output | Serial output from boundary scan register or device ID register during JTAG shift operations |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Memory Protection Unit (MPU) | Enables region-based memory access control for RTOS tasks, preventing unauthorized code/data access |
| Programmable GPIO Slew Rate | Configurable fast/slow edge rates reduce EMI in noise-sensitive industrial environments |
| Dual UART with 16-byte FIFOs | Reduces CPU interrupt load and enables reliable high-speed serial communication without data loss |
| Hardware Watchdog Timer with Reset/Interrupt Modes | Provides fail-safe recovery from software hangs; interrupt mode allows graceful error handling before reset |
| Analog Comparator with Internal Reference | Supports threshold detection without external components; selectable 1.25 V or 2.5 V internal reference voltage |
Applications
| Motor Control System | Industrial HMI Panel |
|---|---|
Use Scenario: Closed-loop BLDC motor control using PWM outputs, current sensing, and encoder feedback processing. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms, GPIO-driven gate drivers, and UART-based host command interface. Use Value: 50 MHz Cortex-M3 core delivers deterministic timing for 20 kHz PWM generation and ADC sampling synchronization. | Use Scenario: Local operator interface with touch buttons, LED indicators, and serial communication to PLC backend. IC Role / Device Role / Timing Role: User input scanning, display update coordination, and dual UART bridging between RS-232 and RS-485 networks. Use Value: Integrated I²C and SSI interfaces enable direct connection to OLED displays and EEPROM configuration storage. |
| Smart Sensor Node | Power Supply Monitor |
Use Scenario: Battery-powered environmental sensor collecting temperature/humidity and transmitting via UART to gateway. IC Role / Device Role / Timing Role: Low-power wake-on-interrupt operation, analog comparator-based voltage monitoring, and sleep-mode management. Use Value: Deep-sleep current < 10 µA and fast wake-up (< 5 µs) extend battery life in intermittent-readout deployments. | Use Scenario: Monitoring rail voltages and overcurrent conditions in programmable power supplies. IC Role / Device Role / Timing Role: Analog comparator triggering fault interrupts, GPIO-controlled shutdown signals, and UART logging of event timestamps. Use Value: Internal 1.25 V reference eliminates need for external precision voltage reference, reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S310-EQN25-C2 | Same package and pinout; adds USB 2.0 OTG controller and 4 KB additional SRAM | Required where host/device USB connectivity is needed; not suitable if USB adds unnecessary complexity or cost | Select LM3S310-EQN25-C2 only when USB functionality is explicitly required and board layout accommodates same footprint |
| TM4C123GH6PM | Newer generation; 80 MHz Cortex-M4F core, 256 KB flash, 32 KB SRAM, FPU, enhanced peripherals (CAN, USB, Ethernet MAC) | Targets upgraded designs needing floating-point math, CAN bus, or higher performance; not drop-in compatible due to different pinout and register map | Choose TM4C123GH6PM for new designs requiring future-proofing, FPU, or CAN; avoid for legacy LM3S300 replacement without redesign |
Compared with LM3S300-EQN25-C2, LM3S310-EQN25-C2 offers identical form-factor and firmware compatibility but adds USB capability, whereas TM4C123GH6PM delivers higher performance and richer peripherals at the cost of migration effort and non-interchangeable packaging.
Availability
LM3S300-EQN25-C2 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, power supply monitoring, and human-machine interface applications requiring stable component supply and long-term production continuity.
Supply support for LM3S300-EQN25-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, specializing in analog, embedded processing, and wireless technologies with over 90 years of innovation in industrial, automotive, and consumer electronics.
The Stellaris LM3S family was designed for cost-sensitive, real-time embedded control applications requiring ARM Cortex-M3 performance, integrated peripherals, and industrial temperature reliability - targeting motor drives, PLC modules, and sensor hubs.
FAQ
What is the maximum operating frequency of the LM3S300-EQN25-C2?
The LM3S300-EQN25-C2 operates at a maximum system clock frequency of 50 MHz, achieved via its on-chip PLL that multiplies the external crystal or oscillator input. This frequency is fully supported across all operating voltage (2.25–2.75 V) and temperature (–40°C to +85°C) ranges specified in the production datasheet. The LM3S300-EQN25-C2 maintains deterministic interrupt latency and memory access timing at this rate.
Does the LM3S300-EQN25-C2 support USB connectivity?
No, the LM3S300-EQN25-C2 does not include a USB controller. USB functionality is present in the pin-compatible LM3S310-EQN25-C2 variant but is absent in the LM3S300-EQN25-C2. Designs requiring USB must either select the LM3S310-EQN25-C2 or add an external USB transceiver. The LM3S300-EQN25-C2 relies on UART, I²C, and SSI for serial communication.
What debug interfaces are supported by the LM3S300-EQN25-C2?
The LM3S300-EQN25-C2 supports IEEE 1149.1-compliant JTAG debugging with full boundary-scan capability, plus Serial Wire Debug (SWD) compatibility through shared pins. It includes hardware breakpoints, watchpoints, and real-time trace via the Trace Port Interface Unit (TPIU). The LM3S300-EQN25-C2 does not support SWO (Single Wire Output) trace streaming.
Is the LM3S300-EQN25-C2 still in active production by Texas Instruments?
Texas Instruments discontinued the LM3S series in favor of the TM4C family, and the LM3S300-EQN25-C2 is now in lifetime buy status. Aetrix Electronics maintains inventory and offers extended supply chain support, including last-time-buy coordination and obsolescence mitigation planning for customers continuing to use the LM3S300-EQN25-C2 in legacy industrial systems.
What are the key differences between LM3S300-EQN25-C2 and LM3S301-EQN25-C2?
The LM3S301-EQN25-C2 is a lower-cost variant with reduced peripheral set: it omits the second UART, one SSI module, and one analog comparator compared to the LM3S300-EQN25-C2. Both share identical core, memory sizes, package, and pinout. Firmware built for LM3S300-EQN25-C2 may require peripheral disablement to run on LM3S301-EQN25-C2.
LM3S300-EQN25-C2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 300
- Packaging:
- Tray
- 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-C2 FAQ
1.How can I place an order for LM3S300-EQN25-C2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S300-EQN25-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-EQN25-C2 reliable?
The price and inventory of LM3S300-EQN25-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-EQN25-C2 is usually 5 days.
3.What payment methods are accepted for LM3S300-EQN25-C2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S300-EQN25-C2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S300-EQN25-C2?
LM3S300-EQN25-C2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S300-EQN25-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-EQN25-C2?
For technical support, including LM3S300-EQN25-C2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S300-EQN25-C2 requirements.
6.How does Aetrix verify that LM3S300-EQN25-C2 is sourced from the original manufacturer or authorized distributors?
All LM3S300-EQN25-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-EQN25-C2 meets industry standards.
7.What is the process for return or replacement of LM3S300-EQN25-C2?
All LM3S300-EQN25-C2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S300-EQN25-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-EQN25-C2 part is unused and in its original packaging.
Return procedure for LM3S300-EQN25-C2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S300-EQN25-C2 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
