My Inquiry
My Account
Texas Instruments LM3S316-IQN25-C2T
- Part No.:
- LM3S316-IQN25-C2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LM3S316-IQN25-C2T.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,735
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S316-IQN25-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, ADC (8-channel, 10-bit), PWM, and analog comparator. It operates from 2.25 V to 3.63 V and targets cost-sensitive industrial control and sensor interface applications.
For engineers reviewing the LM3S316-IQN25-C2T datasheet, LM3S316-IQN25-C2T pinout, LM3S316-IQN25-C2T application, or LM3S316-IQN25-C2T equivalent, key selection criteria include its QFP-48 package, 25 MHz operation, 10-bit ADC sampling rate up to 1 MSPS, PWM dead-band generation capability, and support for JTAG/SWD debug interfaces.
Technical Context
The LM3S316-IQN25-C2T implements the ARMv7-M architecture with Thumb-2 instruction set, NVIC supporting up to 32 interrupt lines, and SysTick timer. Its system-level design integrates clock gating, sleep mode entry via WFI/WFE, and reset sources including power-on, external, and watchdog.
Peripherals are memory-mapped in the AHB/APB bridge architecture: GPIOs, UARTs, SSI, and I²C reside on APB buses with programmable clock dividers; ADC and PWM use dedicated trigger synchronization paths tied to timer events or software commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, supports Thumb-2 instructions and hardware divide |
| Max Clock Frequency | 25 MHz - defines real-time response limit for control loops and communication timing budgets |
| Flash / RAM | 32 KB flash (in-system programmable) + 8 KB SRAM - sufficient for small RTOS or bare-metal motor control firmware |
| ADC | 8-channel, 10-bit SAR with internal temperature sensor and hardware averaging - enables direct thermal monitoring without external components |
| PWM Outputs | 6-channel PWM with configurable dead-band and fault protection - suitable for 3-phase inverter gate drive with safety shutdown |
| Communication Interfaces | 2×UART, 1×I²C, 1×SSI - supports Modbus RTU, sensor hub, and SPI-based display or flash expansion |
| Supply Voltage | 2.25 V to 3.63 V - compatible with single Li-ion or regulated 3.3 V rails in portable industrial devices |
Pinout & Package
LM3S316-IQN25-C2T uses a 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per TI SPMS075I datasheet Section 16 (Pin Diagram) and Section 17 (Signal Tables).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA / VDDC | Power supply inputs | Separate digital, analog, and core supplies enable noise isolation for ADC accuracy |
| GND / GNDA / GNDC | Ground returns | Dedicated analog ground prevents switching noise from corrupting 10-bit conversions |
| PD0–PD7, PE0–PE5, PF0–PF4 | GPIO ports | Configurable as inputs/outputs with pull-up/down, slew rate control, and interrupt capability |
| PA0–PA7, PB0–PB7 | Alternate function pins | Map to UART0/1, SSI0, I²C0, PWM0/1, ADC0, and analog comparator inputs |
| nSRST, nTRST, TCK, TMS, TDI, TDO | JTAG debug interface | Supports full boundary-scan and SWD-compatible debugging without requiring additional protocol converters |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Analog Comparator | Two independent comparators with selectable reference (internal bandgap or external), enabling overvoltage/undervoltage detection without MCU polling |
| Hardware-Accelerated PWM | Dedicated PWM module with dead-band insertion, fault input handling, and synchronous update - reduces firmware overhead in motor control timing-critical paths |
| Programmable Clock Gating | Per-peripheral clock enable/disable via RCC register - lowers active current to ~1.2 mA/MHz at 25 MHz |
| Internal Temperature Sensor | Calibrated 10-bit ADC channel tracking die temperature ±3°C accuracy - eliminates need for external thermal IC in enclosure monitoring |
| Memory Protection Unit (MPU) | 8-region MPU enforcing privilege levels and memory access permissions - supports basic task isolation in dual-thread RTOS environments |
Applications
| Industrial Motor Control | Sensor Data Acquisition |
|---|---|
Use Scenario: Compact BLDC fan controller with overcurrent and thermal shutdown. IC Role / Device Role / Timing Role: Real-time PWM generator with ADC-triggered current sampling and comparator-based fault detection. Use Value: Integrated dead-band and fault inputs allow safe 3-phase gate drive without external logic; 10-bit ADC resolves current shunt voltage to <5 mV precision. | Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and light. IC Role / Device Role / Timing Role: Low-power data concentrator with UART-to-I²C bridge and wake-on-interrupt capability. Use Value: Internal temperature sensor and 8-channel ADC reduce BOM count; sleep modes achieve <10 µA deep-sleep current. |
| Smart Actuator Interface | Legacy Protocol Gateway |
Use Scenario: Valve positioner accepting 4–20 mA input and driving stepper motor via H-bridge. IC Role / Device Role / Timing Role: Analog front-end conditioner and closed-loop position controller with PID execution. Use Value: Dual comparator inputs monitor loop current and supply rail; PWM outputs directly drive external MOSFET drivers with cycle-by-cycle fault disable. | Use Scenario: RS-485 Modbus slave device translating serial commands to I²C sensor reads. IC Role / Device Role / Timing Role: Protocol translator with UART framing, CRC calculation, and I²C master arbitration. Use Value: Two UARTs support simultaneous host command reception and local debug output; SSI peripheral allows optional SD card logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S328-IQN25-C2T | Same package and core, but adds CAN 2.0B controller and increases flash to 64 KB | Required where fieldbus interoperability (e.g., industrial automation networks) is mandatory | Select when CAN protocol stack integration and larger firmware footprint justify higher cost |
| TM4C123GH6PM | Successor family with 80 MHz Cortex-M4F, FPU, USB, and enhanced peripheral set; pin-compatible QFP-64 variant exists but not QFP-48 | Needed for floating-point math, USB device/host, or higher throughput communication | Choose for new designs requiring extended lifecycle, higher performance, or USB connectivity - not drop-in replacement |
Compared with LM3S316-IQN25-C2T, LM3S328-IQN25-C2T offers CAN without changing PCB layout, while TM4C123GH6PM delivers significantly higher compute bandwidth and modern peripherals but requires board redesign due to different pin count and package.
Availability
LM3S316-IQN25-C2T is available at Aetrix Electronics and suitable for industrial motor control, sensor data acquisition, smart actuator interface, and legacy protocol gateway applications requiring stable component supply and long-term obsolescence management.
Supply support for LM3S316-IQN25-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, delivering analog, embedded processing, and wireless technologies across industrial, automotive, and consumer markets.
The Stellaris LM3S series was designed as an entry-level 32-bit MCU platform targeting cost-constrained industrial and appliance applications where ARM Cortex-M3 performance and peripheral integration outweigh legacy 8/16-bit limitations.
FAQ
What is the maximum operating frequency of the LM3S316-IQN25-C2T?
The LM3S316-IQN25-C2T is rated for a maximum system clock frequency of 25 MHz. This speed is achieved using the internal PLL with an external crystal or oscillator input, and it defines the upper bound for instruction execution, peripheral timing, and real-time responsiveness. The LM3S316-IQN25-C2T does not support overclocking beyond this specification, and all timing-critical peripherals - including UART baud generation and PWM period resolution - are validated only up to 25 MHz.
Does the LM3S316-IQN25-C2T support JTAG debugging?
Yes, the LM3S316-IQN25-C2T supports full IEEE 1149.1 JTAG debugging via dedicated pins (TCK, TMS, TDI, TDO, nTRST). It also supports Serial Wire Debug (SWD) mode using TCK and TMS only, reducing debug footprint. The LM3S316-IQN25-C2T integrates an ARM CoreSight-compliant debug interface, enabling breakpoints, watchpoints, and memory inspection during development - all accessible through standard tools like Keil MDK or TI Code Composer Studio.
What are the ADC capabilities of the LM3S316-IQN25-C2T?
The LM3S316-IQN25-C2T features an 8-channel, 10-bit successive approximation register (SAR) ADC with sample rates up to 1 MSPS. It includes hardware averaging across up to 64 samples, an internal temperature sensor calibrated to ±3°C, and differential input support on selected channels. The LM3S316-IQN25-C2T ADC is connected to the APB bus and can be triggered by timers, software, or external events - making it suitable for synchronized current sensing in motor control applications.
Is the LM3S316-IQN25-C2T pin-compatible with other Stellaris devices?
No, the LM3S316-IQN25-C2T is not universally pin-compatible across the Stellaris family. While it shares the 48-pin LQFP package with some variants (e.g., LM3S328-IQN25-C2T), differences in peripheral mapping - such as CAN controller signals replacing GPIO or UART functions - mean that direct substitution may require PCB layout changes. The LM3S316-IQN25-C2T pinout is specific to its feature set and must be verified against TI's SPMS075I datasheet Section 16 before replacement.
What power supply requirements does the LM3S316-IQN25-C2T have?
The LM3S316-IQN25-C2T requires three separate supply domains: VDD (digital I/O, 2.25–3.63 V), VDDA (analog, same voltage range with low-noise decoupling), and VDDC (core logic, 1.2 V generated internally from VDD). External regulators must meet transient response and ripple specs outlined in the LM3S316-IQN25-C2T datasheet Section 5.2.3. Proper separation of GNDA and GND ensures 10-bit ADC accuracy is maintained under dynamic load conditions.
LM3S316-IQN25-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:
- 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:
- 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:
LM3S316-IQN25-C2T FAQ
1.How can I place an order for LM3S316-IQN25-C2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S316-IQN25-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 LM3S316-IQN25-C2T reliable?
The price and inventory of LM3S316-IQN25-C2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S316-IQN25-C2T is usually 5 days.
3.What payment methods are accepted for LM3S316-IQN25-C2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S316-IQN25-C2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S316-IQN25-C2T?
LM3S316-IQN25-C2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S316-IQN25-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 LM3S316-IQN25-C2T?
For technical support, including LM3S316-IQN25-C2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S316-IQN25-C2T requirements.
6.How does Aetrix verify that LM3S316-IQN25-C2T is sourced from the original manufacturer or authorized distributors?
All LM3S316-IQN25-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 LM3S316-IQN25-C2T meets industry standards.
7.What is the process for return or replacement of LM3S316-IQN25-C2T?
All LM3S316-IQN25-C2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S316-IQN25-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 LM3S316-IQN25-C2T part is unused and in its original packaging.
Return procedure for LM3S316-IQN25-C2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S316-IQN25-C2T 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…
