My Inquiry
My Account
Texas Instruments LM3S316-EQN25-C2T
- Part No.:
- LM3S316-EQN25-C2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LM3S316-EQN25-C2T.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,651
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S316-EQN25-C2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated ADC (8-channel, 12-bit), dual UARTs, I²C, SSI, PWM, and analog comparator. It operates at up to 50 MHz and targets motor control and industrial sensing applications.
For engineers reviewing the LM3S316-EQN25-C2T datasheet, LM3S316-EQN25-C2T pinout, LM3S316-EQN25-C2T application, or LM3S316-EQN25-C2T equivalent, key selection criteria include flash/SRAM size, integrated analog peripherals, PWM dead-band support, operating voltage range (2.25–3.6 V), and QFN-48 package compatibility with space-constrained industrial PCB layouts.
Technical Context
The LM3S316-EQN25-C2T implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC for priority-based interrupt handling, and SysTick timer. It integrates a 12-bit ADC with hardware averaging and temperature sensor, plus dual 16/32-bit general-purpose timers supporting RTC and edge-count modes.
Peripherals include two UARTs with FIFOs and modem control, one I²C master/slave interface compliant with SMBus v2.0, one SSI controller supporting Motorola, TI, and National formats, and a dedicated PWM module with dead-band generation and fault protection-enabling closed-loop motor control without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max - enables deterministic real-time execution with low-latency interrupt response (≤12 cycles). |
| Flash Memory | 256 KB - sufficient for complex motor control firmware with safety monitoring and communication stacks. |
| SRAM | 32 KB - supports dual-buffered ADC acquisition, PWM waveform buffering, and stack-intensive RTOS operation. |
| ADC | 8-channel, 12-bit, 1 MSPS - provides high-resolution analog input for current/voltage sensing in BLDC or stepper drives. |
| PWM Outputs | 6-channel, 16-bit resolution with programmable dead-band - directly controls 3-phase inverter gate drivers with shoot-through prevention. |
| Operating Voltage | 2.25 V to 3.6 V - compatible with single-supply 3.3 V systems and tolerant of brown-out conditions down to 2.25 V. |
| Package | QFN-48, 7 mm × 7 mm, 0.5 mm pitch - surface-mount footprint optimized for thermal dissipation and compact industrial control modules. |
Pinout & Package
LM3S316-EQN25-C2T is housed in a 48-pin QFN package (7 mm × 7 mm, 0.5 mm pitch) 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 | Digital, analog, and core power rails-must be decoupled independently per datasheet layout guidelines. |
| GND, GNDA, GNDC | Ground returns | Separate digital/analog/core ground planes required to maintain ADC SNR and noise immunity. |
| PD0–PD7, PE0–PE5, PF0–PF4 | GPIO with alternate functions | Support UART0/1, SSI0, I²C0, PWM0/1, ADC0, and analog comparator-configurable per peripheral enable register. |
| PA0–PA7 | Primary GPIO bank | Includes JTAG/SWD debug pins (PA0–PA3) and reset (PA7); JTAG disabled after boot if SWD selected. |
| USB0VBUS, USB0ID | USB detection inputs | Not functional on LM3S316-EQN25-C2T-these pins are reserved but unused (no USB PHY integrated). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Analog Comparator | Two independent comparators with programmable hysteresis and internal reference-enables overcurrent trip detection without external components. |
| Hardware ADC Averaging | Up to 64-sample hardware averaging per conversion sequence-reduces software filtering overhead and improves effective resolution to ~13.5 bits. |
| PWM Fault Protection | Dedicated fault inputs (PWM0FAULT0/1) that force immediate output shutdown-critical for safe inverter gate drive during overtemperature or short-circuit events. |
| Motor Control Timers | Two 32-bit GPTMs with quadrature encoder input mode and capture/compare-supports precise position/speed feedback for servo and BLDC commutation. |
| Low-Power Sleep Modes | Three sleep modes (sleep/deep-sleep/power-down) with wake-on-GPIO/UART/ADC event-extends battery life in portable industrial sensors. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop speed control of 3-phase BLDC motors in HVAC blowers and pump drives. IC Role / Device Role / Timing Role: Real-time motor commutation engine with PWM timing, ADC current sampling, and fault monitoring. Use Value: Integrated dead-band generator and fault inputs eliminate external protection logic, reducing BOM count and PCB area by ≥3 components. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and air quality via analog and digital sensors. IC Role / Device Role / Timing Role: System controller with low-power sleep/wake scheduling, ADC data acquisition, and UART/I²C sensor interfacing. Use Value: Hardware ADC averaging and deep-sleep current <10 µA extend battery life to >2 years on two AA cells. |
| Programmable Logic Controller (PLC) I/O Module | Industrial Human-Machine Interface (HMI) |
Use Scenario: DIN-rail mounted I/O expansion module with analog input, digital I/O, and RS-485 communication. IC Role / Device Role / Timing Role: Central processing unit managing isolated analog front-end, GPIO expansion, and UART-to-RS485 bridge. Use Value: Dual UARTs with FIFOs support simultaneous Modbus RTU master/slave operation and local debug port without CPU polling overhead. | Use Scenario: Touch-enabled panel display with button inputs, LED indicators, and serial command interface to host controller. IC Role / Device Role / Timing Role: Local UI processor handling touch scan, LED PWM dimming, and UART command parsing. Use Value: Six PWM outputs drive multi-color LEDs and backlight with independent brightness control, eliminating external LED driver ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Tiva C TM4C123GH6PM | ARM Cortex-M4F core, 80 MHz, 256 KB flash, 32 KB SRAM, FPU, enhanced PWM and ADC features. | Higher computational throughput for floating-point motor algorithms; adds USB OTG and CAN. | Select when FPU, CAN, or USB are required; not pin-compatible-requires PCB redesign. |
| STM32F103C8T6 | ARM Cortex-M3 core, 72 MHz, 64 KB flash, 20 KB SRAM, no integrated analog comparator or hardware ADC averaging. | Limited analog feature set; requires external components for overcurrent protection and precision averaging. | Select for cost-sensitive designs where full LM3S316 analog integration is unnecessary; different pinout and peripheral mapping. |
Compared with TM4C123GH6PM and STM32F103C8T6, the LM3S316-EQN25-C2T offers unique analog integration (dual comparator + hardware averaging) and motor-control-optimized PWM in a mature, production-qualified QFN-48 package-ideal for legacy industrial designs requiring long-term supply stability without architectural migration.
Availability
LM3S316-EQN25-C2T is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and HMI panels requiring stable component supply and long-lifecycle support.
Supply support for LM3S316-EQN25-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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of industrial and automotive qualification expertise.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time industrial control applications-emphasizing integrated analog peripherals, motor control timing, and robust operation across extended temperature ranges.
FAQ
What is the maximum operating frequency of the LM3S316-EQN25-C2T?
The LM3S316-EQN25-C2T operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL or external crystal oscillator. This frequency is fully supported across the entire industrial temperature range (–40°C to +105°C) and ensures deterministic real-time performance for motor control loops and communication protocols. The LM3S316-EQN25-C2T maintains timing compliance without derating under worst-case voltage and temperature conditions.
Does the LM3S316-EQN25-C2T include USB functionality?
No, the LM3S316-EQN25-C2T does not include a USB physical layer or USB controller. Pins labeled USB0VBUS and USB0ID are present in the QFN-48 package but are reserved and non-functional-TI explicitly states these signals are not implemented on this device variant. For USB-capable alternatives, consider the Tiva C TM4C123x family. The LM3S316-EQN25-C2T relies on UART, I²C, or SSI for host communication.
What debug interfaces are supported by the LM3S316-EQN25-C2T?
LM3S316-EQN25-C2T supports both JTAG and SWD (Serial Wire Debug) interfaces via PA0–PA3 pins. JTAG is enabled by default at reset; SWD can be selected via software configuration in the Flash memory control register. Both interfaces provide full read/write memory access, breakpoint setting, and real-time register inspection. The LM3S316-EQN25-C2T does not require external debug probes beyond standard TI XDS100v3 or CMSIS-DAP-compliant adapters.
Is the LM3S316-EQN25-C2T qualified for automotive applications?
The LM3S316-EQN25-C2T is not AEC-Q100 qualified and is specified only for industrial temperature range (–40°C to +105°C). While it meets many electrical robustness requirements, TI does not certify this part for automotive use cases such as powertrain or ADAS. For automotive-grade equivalents, TI recommends the Hercules TMS570 or C2000 F28004x families. The LM3S316-EQN25-C2T remains appropriate for industrial automation, building control, and commercial equipment.
How is flash memory protected against accidental overwrite on the LM3S316-EQN25-C2T?
LM3S316-EQN25-C2T implements sector-level flash protection using lock bits stored in the Flash Memory Control register (FLASH_FMA, FLASH_FMC). Each 1 KB flash sector can be individually write-protected or read-protected via dedicated bit fields. Protection is enforced in hardware-no software bypass is possible once locked. Unlocking requires a specific 32-bit key sequence and resets all protection bits. This mechanism prevents unintended firmware corruption during field updates or debugging sessions involving the LM3S316-EQN25-C2T.
LM3S316-EQN25-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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S316-EQN25-C2T FAQ
1.How can I place an order for LM3S316-EQN25-C2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S316-EQN25-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-EQN25-C2T reliable?
The price and inventory of LM3S316-EQN25-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-EQN25-C2T is usually 5 days.
3.What payment methods are accepted for LM3S316-EQN25-C2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S316-EQN25-C2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S316-EQN25-C2T?
LM3S316-EQN25-C2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S316-EQN25-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-EQN25-C2T?
For technical support, including LM3S316-EQN25-C2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S316-EQN25-C2T requirements.
6.How does Aetrix verify that LM3S316-EQN25-C2T is sourced from the original manufacturer or authorized distributors?
All LM3S316-EQN25-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-EQN25-C2T meets industry standards.
7.What is the process for return or replacement of LM3S316-EQN25-C2T?
All LM3S316-EQN25-C2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S316-EQN25-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-EQN25-C2T part is unused and in its original packaging.
Return procedure for LM3S316-EQN25-C2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S316-EQN25-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…
