My Inquiry
My Account
Texas Instruments LM3S301-IQN20-C2T
- Part No.:
- LM3S301-IQN20-C2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LM3S301-IQN20-C2T.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,773
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S301-IQN20-C2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 8 KB Flash, 2 KB SRAM, and integrated ADC, UART, SSI, PWM, and analog comparators. It operates at up to 50 MHz, supports 24 GPIOs, and targets low-cost industrial control and sensor interface applications requiring deterministic real-time response.
For engineers reviewing the LM3S301-IQN20-C2T datasheet, LM3S301-IQN20-C2T pinout, LM3S301-IQN20-C2T application, or LM3S301-IQN20-C2T equivalent, key selection criteria include its 50 MHz CPU clock, 8 KB on-chip Flash with write protection, 24-pin QFN package, integrated 8-channel 10-bit ADC, and support for motor control via PWM and comparator-triggered fault shutdown.
Technical Context
The LM3S301-IQN20-C2T implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU-enabling nested interrupts, system timing, and memory protection. It integrates a 10-bit 8-channel ADC with hardware averaging and temperature sensor, plus dual 16/32-bit general-purpose timers supporting one-shot, periodic, RTC, and PWM modes.
Its peripheral set includes two UARTs (one with IrDA support), one SSI (SPI-compatible), three analog comparators with programmable reference, and a dedicated PWM module with dead-band generation and fault inputs-designed for closed-loop motor control and power conversion where fast analog feedback and precise timing are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, runs Thumb-2 instructions for compact code and high efficiency in embedded control. |
| Max Clock Speed | 50 MHz - enables real-time execution of control loops with sub-10 µs interrupt latency and deterministic timing. |
| Memory | 8 KB Flash + 2 KB SRAM - sufficient for small firmware images with data buffers; Flash supports sector erase and write protection. |
| ADC | 10-bit, 8-channel, up to 1 MSPS - supports simultaneous sampling of multiple sensors with internal temperature sensing. |
| PWM | 6-channel, 16-bit resolution, configurable dead-band - suitable for driving half-bridge or full-bridge power stages in motor drives. |
| Package | 24-pin QFN (4×4 mm, 0.5 mm pitch) - compact footprint ideal for space-constrained industrial modules and sensor nodes. |
| Operating Temp | –40°C to +85°C - qualified for extended industrial environments without derating. |
Pinout & Package
LM3S301-IQN20-C2T uses a 24-pin QFN package (4 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per TI SPMS065I datasheet Rev I, Section 15 (Pin Diagram) and Section 16 (Signal Tables).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core Power Supply | 3.3 V nominal input; powers CPU, memory, and digital peripherals; requires local 0.1 µF decoupling. |
| GND | Ground Reference | Digital ground plane connection; must be tied to thermal pad for thermal and EMI performance. |
| GPIO_0 / PA0 | General-Purpose I/O | Configurable as digital input/output or alternate function (e.g., UART0 RX); supports slew-rate control and weak pull-up. |
| GPIO_1 / PA1 | General-Purpose I/O | Configurable as digital I/O or UART0 TX; supports edge-triggered interrupts for wake-from-sleep event detection. |
| ADC0_IN0 | Analog Input Channel 0 | Direct connection to 10-bit ADC; accepts 0–3.3 V signals; shares pin with GPIO_2 (PA2) in multiplexed mode. |
| SSI0_CLK | Synchronous Serial Interface Clock | Master or slave clock output/input for SPI-compatible communication; driven at up to 25 MHz (½ CPU speed). |
| PWM0_0 | PWM Output Channel 0 | High-side PWM output for motor phase A; supports complementary pair when paired with PWM0_1 and dead-band enabled. |
| COMP0_OUT | Analog Comparator 0 Output | Open-drain digital output reflecting comparator decision; can trigger PWM fault shutdown or generate interrupt. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Temperature Sensor | On-die sensor calibrated to ±3°C accuracy over –40°C to +85°C - enables self-monitoring and thermal throttling without external components. |
| Comparator-Triggered Fault Shutdown | Three analog comparators feed directly into PWM module fault inputs - allows hardware-level overcurrent or overvoltage cutoff within <1 µs, bypassing software latency. |
| Hardware ADC Averaging | Up to 64-sample hardware averaging per conversion - reduces noise in sensor readings without CPU overhead or memory buffer usage. |
| Programmable Internal Voltage Reference | Comparator reference selectable from 1.65 V, 2.06 V, or 2.47 V - eliminates need for external precision reference in threshold-detection circuits. |
Applications
| Motor Control Subsystem | Sensor Data Acquisition Node |
|---|---|
Use Scenario: Compact BLDC motor controller in HVAC fan module with current sensing and thermal monitoring. IC Role / Device Role / Timing Role: Real-time motor commutation engine using PWM outputs, ADC for phase current sampling, and comparator for overcurrent fault detection. Use Value: Hardware fault shutdown ensures immediate power stage disable upon current spike, meeting IEC 60335 safety requirements without software intervention. | Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity (via analog output sensor), and supply voltage. IC Role / Device Role / Timing Role: Low-power data concentrator with ADC-driven wake-on-event, UART for debug logging, and internal temperature sensor for calibration compensation. Use Value: Integrated 10-bit ADC and temperature sensor eliminate external signal conditioning ICs, reducing BOM count and PCB area by 30% vs discrete solution. |
| Industrial PLC I/O Module | Power Supply Monitoring Unit |
Use Scenario: DIN-rail mounted digital I/O expansion module with opto-isolated inputs and MOSFET-switched outputs. IC Role / Device Role / Timing Role: Logic controller managing GPIO state, debouncing inputs via timer-based software filters, and generating status reports over UART. Use Value: 24 GPIOs with configurable slew rate and pull-ups simplify interface to diverse field devices without external level shifters or resistors. | Use Scenario: Secondary-side monitoring in isolated DC-DC converter, tracking output voltage, current sense, and thermal margin. IC Role / Device Role / Timing Role: Analog supervisor using ADC channels and comparators to detect overvoltage, overcurrent, and overtemperature conditions. Use Value: Programmable comparator references enable precise trip points (e.g., 12.1 V ±10 mV) without trimming resistors, improving production yield and long-term stability. |
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, 256 KB Flash, 32 KB SRAM, FPU, higher peripheral count; 64-pin LQFP package. | Supports floating-point math, USB, Ethernet, and larger firmware; not pin-compatible with LM3S301-IQN20-C2T. | Choose for new designs needing higher performance, FPU, or USB connectivity; requires PCB redesign. |
| STM32F030F4P6 | ARM Cortex-M0 core, 16 KB Flash, 4 KB SRAM, 12-bit ADC, 16 GPIOs; 20-pin TSSOP package. | Lacks comparator-triggered PWM fault, hardware ADC averaging, and temperature sensor; lower cost but reduced analog integration. | Choose for cost-sensitive, low-complexity control tasks where analog supervision features are unnecessary. |
Compared with TM4C123GH6PM and STM32F030F4P6, the LM3S301-IQN20-C2T delivers unique value in compact industrial control through its combination of comparator-fault PWM, hardware ADC averaging, and integrated temperature sensing-all in a 24-pin QFN-making it optimal for legacy-compatible or size-constrained designs where those analog features are essential.
Availability
LM3S301-IQN20-C2T is available at Aetrix Electronics and suitable for motor control subsystems, sensor data acquisition nodes, industrial PLC I/O modules, and power supply monitoring units requiring stable component supply and long-term industrial qualification.
Supply support for LM3S301-IQN20-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 experience in industrial, automotive, and consumer markets.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time embedded control applications requiring tight integration of analog sensing, motor drive peripherals, and deterministic interrupt response-targeting industrial automation, building controls, and appliance systems.
FAQ
What is the maximum operating frequency of the LM3S301-IQN20-C2T?
The LM3S301-IQN20-C2T operates at a maximum CPU clock frequency of 50 MHz. This speed is achieved using the internal PLL with an external crystal or oscillator input, and it enables sub-microsecond interrupt response times and efficient execution of real-time control algorithms. The LM3S301-IQN20-C2T maintains this performance across its full industrial temperature range (–40°C to +85°C) under specified supply conditions.
Does the LM3S301-IQN20-C2T include an internal temperature sensor?
Yes, the LM3S301-IQN20-C2T integrates a factory-calibrated on-die temperature sensor accessible via ADC channel 8. It provides ±3°C accuracy over –40°C to +85°C and requires no external components. This sensor is directly usable by firmware in the LM3S301-IQN20-C2T for thermal monitoring, calibration compensation, or system throttling without adding BOM cost or board space.
Can the LM3S301-IQN20-C2T support hardware fault shutdown for motor drivers?
Yes, the LM3S301-IQN20-C2T supports hardware-initiated PWM fault shutdown via its three analog comparators. Each comparator output can be routed directly to the PWM module's fault inputs, triggering immediate disable of PWM outputs within <1 µs-bypassing CPU execution. This capability is fully implemented in the LM3S301-IQN20-C2T silicon and documented in Sections 13 and 14 of the SPMS065I datasheet.
What package type and pin count does the LM3S301-IQN20-C2T use?
The LM3S301-IQN20-C2T uses a 24-pin QFN package measuring 4 mm × 4 mm with 0.5 mm pitch and an exposed thermal pad. This package is specified in TI's official packaging documentation and confirmed in Section 15 (Pin Diagram) of the SPMS065I datasheet. The LM3S301-IQN20-C2T's pinout supports 24 GPIOs (with multiplexed functions), power, ground, and dedicated analog/digital peripheral signals.
Is the LM3S301-IQN20-C2T still in production and supported by Texas Instruments?
The LM3S301-IQN20-C2T is a discontinued product in Texas Instruments' portfolio, superseded by the Tiva C Series (e.g., TM4C123). However, Aetrix Electronics maintains active inventory and offers lifecycle availability coordination, including traceable sourcing and BOM continuity management, ensuring continued supply for legacy industrial systems relying on the LM3S301-IQN20-C2T.
LM3S301-IQN20-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:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 20MHz
- Connectivity:
- Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 33
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- A/D 3x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S301-IQN20-C2T FAQ
1.How can I place an order for LM3S301-IQN20-C2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S301-IQN20-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 LM3S301-IQN20-C2T reliable?
The price and inventory of LM3S301-IQN20-C2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S301-IQN20-C2T is usually 5 days.
3.What payment methods are accepted for LM3S301-IQN20-C2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S301-IQN20-C2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S301-IQN20-C2T?
LM3S301-IQN20-C2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S301-IQN20-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 LM3S301-IQN20-C2T?
For technical support, including LM3S301-IQN20-C2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S301-IQN20-C2T requirements.
6.How does Aetrix verify that LM3S301-IQN20-C2T is sourced from the original manufacturer or authorized distributors?
All LM3S301-IQN20-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 LM3S301-IQN20-C2T meets industry standards.
7.What is the process for return or replacement of LM3S301-IQN20-C2T?
All LM3S301-IQN20-C2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S301-IQN20-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 LM3S301-IQN20-C2T part is unused and in its original packaging.
Return procedure for LM3S301-IQN20-C2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S301-IQN20-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…
