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Texas Instruments LM3S300-EGZ25-C2T
- Part No.:
- LM3S300-EGZ25-C2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
LM3S300-EGZ25-C2T.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 48VQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S300-EGZ25-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, GPIO, timers, and analog comparators. It targets motor control and industrial embedded systems requiring deterministic real-time response and low-power operation.
For engineers reviewing the LM3S300-EGZ25-C2T datasheet, LM3S300-EGZ25-C2T pinout, LM3S300-EGZ25-C2T application, or LM3S300-EGZ25-C2T equivalent, key selection criteria include its 25 MHz clock rating, QFP-48 package, 32 KB/8 KB memory split, Cortex-M3 interrupt latency, and support for motor control peripheral configurations.
Technical Context
The LM3S300-EGZ25-C2T implements the ARMv7-M architecture with Thumb-2 instruction set, nested vectored interrupt controller (NVIC) supporting up to 32 interrupts, and system-level debug via JTAG interface. It includes a SysTick timer, memory protection unit (MPU), and power management features enabling sleep mode entry with wake-up on GPIO or peripheral events.
Its peripheral set integrates three UARTs, two SSI modules, one I²C master/slave interface, eight PWM-capable general-purpose timers, and two analog comparators with internal voltage reference. All peripherals are memory-mapped and accessible via APB bus with configurable clock gating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, Thumb-2 instruction set, 25 MHz max operation |
| Flash Memory | 32 KB on-chip flash with erase/write cycle endurance and programmable protection bits |
| SRAM | 8 KB on-chip SRAM, zero-wait-state access at full speed |
| Operating Voltage | 3.0 V to 3.6 V supply range, compatible with standard 3.3 V logic systems |
| Temperature Range | –40°C to +85°C industrial grade operation |
| Package | 48-pin LQFP (7 mm × 7 mm), RoHS-compliant, lead-free |
| Peripherals | 3× UART, 2× SSI, 1× I²C, 8× GPTM, 2× analog comparator, JTAG debug interface |
Pinout & Package
LM3S300-EGZ25-C2T is housed in a 48-pin LQFP (7 mm × 7 mm) package with exposed thermal pad. Pin assignments follow TI's standardized Stellaris LM3S series layout, supporting multiplexed peripheral functions per GPIO bank.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O Power Supply | 3.0–3.6 V main supply input; decoupling required per datasheet layout guidelines |
| GND | Ground Reference | Digital ground return; multiple pins provided for low-impedance return path |
| PD0/U0RX | UART0 Receive Input | Primary serial receive pin for UART0; supports TTL-level signaling |
| PD1/U0TX | UART0 Transmit Output | Primary serial transmit pin for UART0; drives 3.3 V CMOS levels |
| PA0/U1RX | UART1 Receive Input | Secondary UART receive; shares pin with SSI0CLK and I²C0SCL |
| PA1/U1TX | UART1 Transmit Output | Secondary UART transmit; supports alternate function remapping via GPIOAFSEL |
| PC4/I2C0SCL | I²C Clock Output/Input | Open-drain output with internal pull-up; requires external pull-up for bus operation |
| PC5/I2C0SDA | I²C Data Input/Output | Open-drain bidirectional data line; synchronized with I2C0SCL for standard-mode (100 kHz) or fast-mode (400 kHz) |
Key Features
| Feature | Design Value |
|---|---|
| ARM Cortex-M3 Core | Single-cycle multiply, hardware divide, NVIC with 32 priority levels, and sub-12-cycle interrupt latency |
| Motor Control Timers | Eight 16/32-bit general-purpose timers with PWM, input capture, and quadrature encoder interface capability |
| Analog Comparators | Two independent comparators with selectable internal reference (1.65 V or 2.5 V) and interrupt generation on edge detection |
| Memory Protection Unit (MPU) | Configurable region-based memory access control to isolate code, data, and peripheral spaces |
| JTAG Debug Interface | Full boundary-scan and real-time debugging support via SWD-compatible JTAG TAP controller |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC blowers using hall-effect feedback and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, PWM waveform generation, and fault monitoring via analog comparators. Use Value: Deterministic 25 MHz Cortex-M3 timing enables <10 µs interrupt response for overcurrent shutdown and commutation sequencing. | Use Scenario: Battery-powered environmental sensor hub aggregating temperature, humidity, and CO₂ readings via I²C and UART interfaces. IC Role / Device Role / Timing Role: Low-power host controller managing sensor polling, data buffering, and wireless module handshaking. Use Value: Integrated 8 KB SRAM allows local data staging without external memory; sleep modes reduce active current to 120 µA/MHz. |
| Programmable Logic Controller (PLC) I/O Module | Embedded HMI Controller |
Use Scenario: DIN-rail mounted I/O expansion module with discrete input conditioning, relay drive outputs, and Modbus RTU communication. IC Role / Device Role / Timing Role: Protocol stack execution, GPIO state scanning, and UART-to-Modbus frame translation. Use Value: Three UARTs enable simultaneous Modbus master/slave and debug port operation without external bridging. | Use Scenario: Touch-enabled front-panel controller for medical equipment with LED backlight dimming and button debounce logic. IC Role / Device Role / Timing Role: GUI state machine executor, PWM-controlled LED driver, and capacitive touch signal pre-processing. Use Value: Eight GPTMs provide independent 16-bit PWM channels for multi-zone backlight control with 0.1% duty resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S310-EGZ25-C2T | Same core and package, but with 64 KB flash and identical peripheral set | Supports larger firmware images and bootloader+application dual-bank updates | Select when firmware size exceeds 32 KB or field-upgrade capability is required |
| TM4C123GH6PM | Successor family with 80 MHz Cortex-M4F core, FPU, enhanced PWM, and USB OTG | Enables floating-point math, USB device/host, and higher-resolution motor control | Select for new designs needing performance headroom, USB connectivity, or IEEE 754 compliance |
Compared with LM3S300-EGZ25-C2T, LM3S310-EGZ25-C2T offers double flash capacity without changing PCB layout, while TM4C123GH6PM delivers 3.2× CPU throughput and added peripherals-making it suitable for next-generation designs where legacy compatibility is not mandatory.
Availability
LM3S300-EGZ25-C2T is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and embedded HMI controllers requiring stable component supply across extended production lifecycles.
Supply support for LM3S300-EGZ25-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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal processing technologies since 1930.
The Stellaris LM3S series was designed as TI's first ARM-based microcontroller platform targeting cost-sensitive industrial and motor control applications with integrated peripherals and deterministic real-time performance.
FAQ
What is the maximum operating frequency of the LM3S300-EGZ25-C2T?
The LM3S300-EGZ25-C2T operates at a maximum CPU frequency of 25 MHz. This rating is specified under recommended DC operating conditions (3.0 V to 3.6 V supply, –40°C to +85°C ambient). The internal PLL is not present in this variant; clocking derives directly from the main oscillator or external crystal, limiting top speed to 25 MHz. System performance remains deterministic within this bound, making LM3S300-EGZ25-C2T suitable for time-critical motor control loops.
Does the LM3S300-EGZ25-C2T support USB connectivity?
No, the LM3S300-EGZ25-C2T does not include a USB controller or physical transceiver. Its serial communication peripherals consist of three UARTs, two SSI modules, and one I²C interface. For USB functionality, designers must use external USB-to-UART bridges or migrate to TI's TM4C123 series, which integrates USB OTG. The absence of USB in LM3S300-EGZ25-C2T reflects its positioning as a cost-optimized industrial MCU prior to USB integration in later Stellaris generations.
What debug interface does the LM3S300-EGZ25-C2T use?
The LM3S300-EGZ25-C2T uses a 4-pin JTAG interface compliant with IEEE 1149.1, supporting boundary-scan testing and real-time debugging via SWD-compatible TAP controller. Pins include TCK, TMS, TDI, and TDO; TRST is optional. TI's Stellaris ICDI and third-party J-Link adapters fully support LM3S300-EGZ25-C2T debugging. No SWD-only mode exists-the JTAG interface is the sole standardized debug path for this device.
Is the LM3S300-EGZ25-C2T pin-compatible with other LM3S devices?
The LM3S300-EGZ25-C2T is pin-compatible with other LM3S3xx-series devices in the same 48-pin LQFP package, including LM3S310-EGZ25-C2T and LM3S360-EGZ25-C2T. Pin mappings for power, ground, JTAG, and primary peripherals (UART0, I²C0, SSI0) are identical. However, alternate function allocations for GPIO banks differ across variants-software must verify GPIOAFSEL register settings before enabling secondary peripherals to avoid functional conflict on shared pins.
What is the flash endurance specification for the LM3S300-EGZ25-C2T?
The LM3S300-EGZ25-C2T specifies 10,000 write/erase cycles for its 32 KB on-chip flash memory, with data retention guaranteed for 20 years at 85°C. Flash programming requires sector-level erasure (1 KB minimum) and uses standard ARM-aligned word writes. TI's Flash API (included in StellarisWare) handles timing and verification; no external high-voltage programming supply is needed. This endurance level supports infrequent firmware updates typical in industrial deployments, not high-frequency logging applications.
LM3S300-EGZ25-C2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- Stellaris® ARM® Cortex®-M3S 300
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-EGZ25-C2T FAQ
1.How can I place an order for LM3S300-EGZ25-C2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S300-EGZ25-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-EGZ25-C2T reliable?
The price and inventory of LM3S300-EGZ25-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-EGZ25-C2T is usually 5 days.
3.What payment methods are accepted for LM3S300-EGZ25-C2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S300-EGZ25-C2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S300-EGZ25-C2T?
LM3S300-EGZ25-C2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S300-EGZ25-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-EGZ25-C2T?
For technical support, including LM3S300-EGZ25-C2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S300-EGZ25-C2T requirements.
6.How does Aetrix verify that LM3S300-EGZ25-C2T is sourced from the original manufacturer or authorized distributors?
All LM3S300-EGZ25-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-EGZ25-C2T meets industry standards.
7.What is the process for return or replacement of LM3S300-EGZ25-C2T?
All LM3S300-EGZ25-C2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S300-EGZ25-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-EGZ25-C2T part is unused and in its original packaging.
Return procedure for LM3S300-EGZ25-C2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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