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Texas Instruments LM3S315-IQN25-C2
- Part No.:
- LM3S315-IQN25-C2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LM3S315-IQN25-C2.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,688
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Product details
Overview
LM3S315-IQN25-C2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated ADC (8-channel, 12-bit), two UARTs, SSI, PWM, and analog comparator - designed for real-time motor control and industrial I/O systems operating at up to 50 MHz.
For engineers reviewing the LM3S315-IQN25-C2 datasheet, LM3S315-IQN25-C2 pinout, LM3S315-IQN25-C2 application, or LM3S315-IQN25-C2 equivalent, key selection criteria include its 50 MHz CPU clock, 256 KB on-chip flash with hardware write protection, dual UART support with FIFO, and QFP-100 package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The LM3S315-IQN25-C2 implements the ARMv7-M architecture with nested vectored interrupt controller (NVIC), SysTick timer, and memory protection unit (MPU). It integrates dedicated motor-control peripherals including six PWM generator outputs with dead-band generation and fault handling logic.
Its analog subsystem includes an 8-channel, 12-bit ADC with hardware averaging and internal temperature sensor, plus a dual analog comparator with programmable reference. Clocking supports PLL-based 50 MHz operation from internal or external sources, with multiple low-power sleep modes managed via system control block (SCB).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, runs Thumb-2 instructions at up to 50 MHz |
| Flash Memory | 256 KB on-chip, supports in-application programming and hardware write protection |
| SRAM | 32 KB on-chip, zero-wait-state access at full CPU speed |
| ADC | 8-channel, 12-bit SAR with 1 MSPS sample rate and hardware averaging up to 64x |
| PWM Outputs | 6 independent outputs with configurable dead-band, fault shutdown, and sync capability |
| UART Interfaces | 2 × UART with 16-byte FIFO, modem control signals, and IrDA support |
| Operating Temp | –40°C to +85°C ambient, qualified for industrial environments |
| Package | 100-pin LQFP (IQN), 14 mm × 14 mm, 0.5 mm pitch |
Pinout & Package
LM3S315-IQN25-C2 is housed in a 100-pin Low-Profile Quad Flat Package (LQFP) with exposed thermal pad, compatible with standard reflow profiles and industrial PCB assembly processes.
| 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 regulation with local decoupling |
| GND, GNDA, GNDC | Ground returns | Analog (GNDA), core (GNDC), and I/O (GND) grounds must be partitioned and joined at single point |
| PF0–PF7, PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE5, PG0–PG5 | GPIO banks | Configurable as digital I/O, alternate functions (UART, SSI, PWM, ADC), or interrupts with edge select |
| U0RX/U0TX, U1RX/U1TX | UART signal pairs | Two independent UART channels with full-duplex operation, FIFO buffering, and programmable baud rates |
| SSI0CLK/SS0FSS/SSI0RX/SSI0TX | Synchronous serial interface | Four-wire SPI-compatible interface supporting master/slave mode, programmable bit rate, and FIFO |
| ADC0, ADC1, ..., ADC7 | Analog input channels | Eight single-ended or four differential inputs routed to 12-bit ADC with internal reference or external VREF |
| FAULT0, FAULT1 | PWM fault inputs | Dedicated asynchronous inputs that force immediate PWM output shutdown for overcurrent or thermal protection |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Motor Control PWM | Six PWM outputs with synchronized timing, dead-band insertion, and fault-triggered forced-off state |
| Hardware-Accelerated ADC Averaging | Up to 64-sample hardware averaging per conversion reduces noise without CPU overhead |
| Dual Analog Comparators | Each comparator supports internal voltage reference or external threshold, with interrupt and trigger output |
| Programmable GPIO Alternate Functions | Each of 68 GPIO pins supports ≥2 alternate peripheral functions, enabling flexible board routing |
| On-Chip Flash Security | Flash lock bits prevent read-out and unauthorized firmware modification; debug access can be disabled |
| Industrial Temperature Range | Rated for continuous operation from –40°C to +85°C, validated across full voltage and frequency range |
Applications
| Motor Control System | Industrial PLC I/O Module |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors using space-vector modulation and current sensing. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, PWM waveform generation, ADC sampling synchronization, and fault response within <1 µs latency. Use Value: Integrated PWM dead-band and fault inputs eliminate external protection logic; 50 MHz CPU enables sub-10 µs control loop execution. | Use Scenario: Modular digital input/output expansion for DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: High-speed scanning of 32 discrete inputs and driving 16 isolated outputs with deterministic timing and watchdog supervision. Use Value: Dual UARTs enable Modbus RTU master/slave communication; GPIO flexibility supports sink/source configurations without external level shifters. |
| Smart Sensor Node | Energy Monitoring Unit |
Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and vibration via analog and digital interfaces. IC Role / Device Role / Timing Role: Low-power data acquisition hub with wake-on-interrupt, ADC oversampling, and UART/SSI sensor interfacing. Use Value: Hardware ADC averaging improves SNR by 12 dB; deep-sleep modes draw <10 µA while retaining SRAM and RTC state. | Use Scenario: Three-phase AC energy metering with voltage/current sampling, RMS calculation, and tamper detection. IC Role / Device Role / Timing Role: Simultaneous sampling of 6 analog channels (3× voltage, 3× current) with precise phase alignment and timestamping. Use Value: 12-bit ADC with internal temperature sensor enables gain/offset calibration; dual comparators detect zero-crossing and overvoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMS320F28027PTT | DSP-based C2000 core, 60 MHz, 32 KB flash, no Cortex-M3 instruction set or NVIC compatibility | Optimized for high-precision motor control math (e.g., Park/Clarke transforms); lacks UART/SSI peripherals | Select when floating-point intensive control algorithms dominate over general-purpose connectivity needs |
| STM32F103VCT6 | Cortex-M3 core at 72 MHz, 256 KB flash, 48 KB SRAM, but no integrated analog comparator or dedicated PWM fault inputs | Broad general-purpose use; requires external comparators for overcurrent protection in motor drives | Choose for higher clock speed and larger RAM where analog comparator integration is not required |
Compared with TMS320F28027PTT and STM32F103VCT6, the LM3S315-IQN25-C2 uniquely combines industrial-grade analog peripherals (dual comparator, hardware-averaged ADC), motor-specific PWM features (fault inputs, dead-band), and full UART/SSI connectivity in a single 100-pin LQFP package - reducing BOM count and layout complexity for embedded motion control.
Availability
LM3S315-IQN25-C2 is available at Aetrix Electronics and suitable for industrial motor control systems, programmable logic controller (PLC) modules, smart sensor nodes, and energy monitoring units requiring stable component supply and long-term production continuity.
Supply support for LM3S315-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 for industrial, automotive, and consumer markets since 1930.
The Stellaris LM3S series was TI's first family of ARM Cortex-M3 microcontrollers, engineered specifically for deterministic real-time control in resource-constrained industrial and motor applications - emphasizing integrated analog, robust PWM, and industrial temperature reliability.
FAQ
What is the maximum operating frequency of the LM3S315-IQN25-C2?
The LM3S315-IQN25-C2 operates at a maximum CPU frequency of 50 MHz, achieved via its on-chip PLL that multiplies an internal 6.25 MHz oscillator or external crystal input. This frequency is fully supported across the entire industrial temperature range (–40°C to +85°C) and 3.3 V supply, with all peripherals functional at rated speed. The LM3S315-IQN25-C2 does not support overclocking beyond 50 MHz, and timing parameters in the datasheet assume this maximum operational limit.
Does the LM3S315-IQN25-C2 include hardware debug support?
Yes, the LM3S315-IQN25-C2 integrates a full ARM CoreSight-compliant debug interface with JTAG and SWD support, including breakpoints, watchpoints, and real-time memory access during active execution. It supports TI's Stellaris ICDI and third-party debug probes via the standard 10-pin ARM JTAG connector. Debug functionality remains available even when flash security bits are set, though full memory read access may be restricted depending on lock configuration. The LM3S315-IQN25-C2 debug implementation complies with ARM CoreSight v1.0 specifications.
What are the power supply requirements for the LM3S315-IQN25-C2?
The LM3S315-IQN25-C2 requires three separate 3.3 V supplies: VDD (I/O), VDDC (core), and VDDA (analog), each with dedicated 100 nF ceramic decoupling capacitors placed near respective pins. The device includes an internal LDO regulator for VDDC, but external regulation is mandatory for VDD and VDDA to ensure analog accuracy and I/O noise immunity. Total supply current ranges from <10 µA in deep-sleep mode to ~65 mA at 50 MHz with all peripherals active. The LM3S315-IQN25-C2 does not support direct 5 V operation.
Can the LM3S315-IQN25-C2 operate without an external crystal?
Yes, the LM3S315-IQN25-C2 can operate using its internal 6.25 MHz precision oscillator without any external crystal or resonator. This internal oscillator supports full-speed operation (50 MHz via PLL) and is factory-trimmed to ±1.5% accuracy over temperature and voltage. An external crystal (1–25 MHz) is optional and used only when higher clock accuracy (e.g., for UART baud-rate stability or time-critical synchronization) is required. The LM3S315-IQN25-C2 automatically selects the clock source based on configuration bits in the RCC register.
Is the LM3S315-IQN25-C2 pin-compatible with other LM3S devices?
No, the LM3S315-IQN25-C2 is not pin-compatible with other LM3S family members such as the LM3S811 or LM3S6965. While it shares the same 100-pin LQFP (IQN) package outline, signal assignments differ significantly across variants due to varying peripheral sets and GPIO multiplexing. For example, PWM and ADC channel mappings, UART pin locations, and SSI signal routing are unique to the LM3S315-IQN25-C2 per its datasheet Table 16-1. Migration requires PCB redesign. The LM3S315-IQN25-C2 pinout is fixed and documented exclusively in its SPMS072I datasheet revision.
LM3S315-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:
- Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 32
- 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:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S315-IQN25-C2 FAQ
1.How can I place an order for LM3S315-IQN25-C2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S315-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 LM3S315-IQN25-C2 reliable?
The price and inventory of LM3S315-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 LM3S315-IQN25-C2 is usually 5 days.
3.What payment methods are accepted for LM3S315-IQN25-C2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S315-IQN25-C2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S315-IQN25-C2?
LM3S315-IQN25-C2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S315-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 LM3S315-IQN25-C2?
For technical support, including LM3S315-IQN25-C2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S315-IQN25-C2 requirements.
6.How does Aetrix verify that LM3S315-IQN25-C2 is sourced from the original manufacturer or authorized distributors?
All LM3S315-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 LM3S315-IQN25-C2 meets industry standards.
7.What is the process for return or replacement of LM3S315-IQN25-C2?
All LM3S315-IQN25-C2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S315-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 LM3S315-IQN25-C2 part is unused and in its original packaging.
Return procedure for LM3S315-IQN25-C2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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