My Inquiry
My Account
Texas Instruments LM3S618-IQN50-C2
- Part No.:
- LM3S618-IQN50-C2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LM3S618-IQN50-C2.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,029
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S618-IQN50-C2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated ADC (10-bit, 1 MSPS), dual UARTs, SSI, PWM, QEI, and analog comparator. It operates at 50 MHz, supports -40°C to +85°C industrial temperature range, and targets motor control and embedded automation systems.
For engineers reviewing the LM3S618-IQN50-C2 datasheet, LM3S618-IQN50-C2 pinout, LM3S618-IQN50-C2 application, or LM3S618-IQN50-C2 equivalent, key selection criteria include its 50 MHz CPU clock, 256 KB on-chip flash with write protection, integrated motor-control peripherals (QEI, PWM with dead-band), and industrial-grade temperature rating.
Technical Context
The LM3S618-IQN50-C2 implements the ARM Cortex-M3 core with NVIC, SysTick, MPU, and debug support via JTAG. It integrates dedicated motor-control hardware including quadrature encoder interface (QEI) for position sensing and PWM generator with configurable dead-band for gate drive timing control.
Its analog subsystem includes a 10-bit, 1-MSPS ADC with four sample sequencers and internal temperature sensor, plus an analog comparator with programmable reference. Serial connectivity comprises two UARTs (one with IrDA support), one SSI port, and GPIOs with multiple alternate functions mapped across 68 pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max operation - enables deterministic real-time execution with Thumb-2 instruction set and low-latency interrupt handling. |
| Memory | 256 KB flash + 32 KB SRAM - sufficient for standalone motor control firmware with bootloader, parameter tables, and runtime variables. |
| ADC | 10-bit, 1 MSPS, 8-channel with 4 sequencers - supports simultaneous sampling of current/voltage/temperature in closed-loop drives. |
| PWM | 6-channel, 16-bit, with dead-band generation - directly controls 3-phase inverter bridges with shoot-through prevention. |
| QEI | Quadrature Encoder Interface with index and timer capture - interfaces to rotary encoders for precise rotor position feedback in BLDC/PMSM control. |
| Temperature Range | -40°C to +85°C - qualified for industrial motor drives, HVAC controllers, and factory automation equipment. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - standard surface-mount footprint compatible with automated PCB assembly. |
Pinout & Package
LM3S618-IQN50-C2 is housed in a 100-pin LQFP package (JEDEC MO-152AC). Pin assignments are defined per TI datasheet SPMS123I, with dedicated power/ground pairs, VDDA/VSSA for analog domain isolation, and multiplexed GPIO supporting up to 68 digital I/Os.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA | Supply voltage inputs | VDD = 3.3 V digital supply; VDDA = 3.3 V analog supply - separate domains reduce noise coupling into ADC/comparator. |
| VSS, VSSA | Ground returns | Digital and analog ground planes must be connected at single point near regulator to minimize ground bounce. |
| GPIO_A0–A7 | General-purpose I/O | Configurable as digital I/O, UART0/1, SSI0, PWM0–5, QEI, or ADC input - enables flexible peripheral mapping without external logic. |
| PH0–PH7 | High-drive GPIO bank | Supports 8 mA sink/source - suitable for direct LED indicators or small-signal relay drivers. |
| nRST | Active-low reset input | Asynchronous reset asserted low; internal pull-up ensures valid state during power-up; compatible with external supervisor ICs. |
| TCK/TMS/TDI/TDO | JTAG debug interface | Enables full SWD/JTAG debugging, flash programming, and real-time trace via TI XDS100v3 or compatible emulators. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated QEI with index pulse detection | Directly processes A/B/Z encoder signals for high-resolution position tracking without CPU overhead. |
| PWM with programmable dead-band | Prevents shoot-through in half/full-bridge topologies by inserting user-defined delay between complementary outputs. |
| Four independent ADC sample sequencers | Allows concurrent sampling of multiple analog sensors (e.g., phase currents + DC bus voltage + temperature) with automatic DMA triggering. |
| Analog comparator with internal reference | Provides fast overcurrent or fault detection (<1 µs response) using on-chip 1.65 V reference or external voltage divider. |
| MPU and NVIC with 8-level priority | Enables memory protection and deterministic interrupt latency critical for safety-aware motor control firmware. |
Applications
| Industrial Motor Drive | Smart HVAC Controller |
|---|---|
Use Scenario: Closed-loop speed/position control of 3-phase BLDC motors in conveyor systems and pumps. IC Role / Device Role / Timing Role: Main system controller executing FOC algorithm, managing PWM output, reading QEI feedback, and monitoring current via ADC. Use Value: Integrated QEI and dead-band PWM eliminate external glue logic; 50 MHz Cortex-M3 delivers sufficient MIPS for real-time torque computation at 20 kHz update rate. | Use Scenario: Multi-zone air handling unit with variable-speed fans, damper actuation, and environmental sensing. IC Role / Device Role / Timing Role: Central MCU coordinating fan speed (PWM), temperature/humidity readings (ADC), and communication (UART to BACnet gateway). Use Value: Dual UARTs support local RS-485 diagnostics and upstream Modbus RTU; 256 KB flash stores firmware plus configuration profiles for different operating modes. |
| Programmable Logic Controller (PLC) I/O Module | Factory Automation Sensor Node |
Use Scenario: DIN-rail mounted digital I/O expansion module with isolated inputs and relay outputs. IC Role / Device Role / Timing Role: Host processor managing opto-isolated inputs, driving relay drivers, and communicating via RS-232/RS-485 to PLC backplane. Use Value: 68 GPIOs support 32-channel discrete I/O; internal LDO regulator simplifies power design by accepting 5 V or 24 V input with local 3.3 V generation. | Use Scenario: Wireless-capable edge node monitoring vibration, temperature, and power quality in rotating machinery. IC Role / Device Role / Timing Role: Data acquisition engine capturing analog waveforms (ADC), conditioning signals (comparator), and preparing packets for RF transmission. Use Value: Hardware averaging in ADC improves SNR for low-amplitude vibration analysis; internal temperature sensor enables thermal derating of motor algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TM4C123GH6PM | Successor part: Cortex-M4F core, 80 MHz, 256 KB flash, FPU, enhanced PWM/QEI, same 100-pin LQFP package. | Supports floating-point math for advanced motor control (e.g., observer-based FOC); higher clock enables faster loop rates. | Select TM4C123GH6PM when upgrading legacy LM3S designs requiring FPU, higher performance, or extended peripheral feature set. |
| STM32F303VCT6 | ARM Cortex-M4F, 72 MHz, 256 KB flash, 48 KB RAM, integrated op-amps and comparators, 100-pin LQFP. | Better analog integration (rail-to-rail op-amps) but lacks QEI; requires external encoder interface IC for motor position feedback. | Select STM32F303VCT6 where analog signal conditioning dominates over encoder-based motion control. |
Compared with TM4C123GH6PM and STM32F303VCT6, the LM3S618-IQN50-C2 offers mature, production-proven motor control IP (QEI + dead-band PWM) in a cost-optimized Cortex-M3 implementation - ideal for stable, long-lifecycle industrial designs where upgrade path exists but immediate FPU or op-amp features are unnecessary.
Availability
LM3S618-IQN50-C2 is available at Aetrix Electronics and suitable for industrial motor drives, smart HVAC controllers, and programmable logic controller (PLC) I/O modules requiring stable component supply and long-term obsolescence management.
Supply support for LM3S618-IQN50-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 leader specializing in analog, embedded processing, and wireless technologies, with decades of experience in industrial and automotive microcontrollers.
The Stellaris LM3S family was designed specifically for cost-sensitive, real-time embedded applications demanding integrated motor control, analog sensing, and deterministic interrupt response - targeting industrial automation, building control, and appliance markets.
FAQ
What is the maximum operating frequency of the LM3S618-IQN50-C2?
The LM3S618-IQN50-C2 operates at a maximum CPU frequency of 50 MHz, as specified in the Texas Instruments SPMS123I datasheet. This clock speed is achieved using the internal PLL driven from the main oscillator or external crystal. The 50 MHz rating applies across the full industrial temperature range (-40°C to +85°C) and under recommended supply conditions (3.3 V ± 5%). The LM3S618-IQN50-C2 does not support overclocking beyond this specification.
Does the LM3S618-IQN50-C2 include hardware debug support?
Yes, the LM3S618-IQN50-C2 includes full JTAG and SWD debug interfaces compliant with ARM CoreSight standards. Pins TCK, TMS, TDI, TDO, and nTRST support boundary-scan testing, flash programming, and real-time debugging via TI XDS100v3 or compatible emulators. The LM3S618-IQN50-C2 also integrates NVIC and SysTick for precise interrupt timing analysis during development.
What analog peripherals are integrated into the LM3S618-IQN50-C2?
The LM3S618-IQN50-C2 integrates a 10-bit, 1-MSPS ADC with eight input channels and four independent sample sequencers; a dual analog comparator with programmable internal reference (1.65 V); and an on-die temperature sensor. These peripherals are electrically isolated via dedicated VDDA/VSSA pins and support hardware-triggered conversions synchronized to PWM events - all confirmed in the SPMS123I datasheet section 10 and 13.
Is the LM3S618-IQN50-C2 pin-compatible with other Stellaris devices?
No, the LM3S618-IQN50-C2 is not pin-compatible with other Stellaris microcontrollers such as the LM3S811 or LM3S9B92. While all share the 100-pin LQFP package, signal assignments differ significantly across the family - for example, QEI and PWM pin mappings vary between variants. Migration requires PCB layout changes. The LM3S618-IQN50-C2 pinout is unique to its specific peripheral configuration and documented in Section 16 of SPMS123I.
What is the flash memory endurance and data retention specification for the LM3S618-IQN50-C2?
The LM3S618-IQN50-C2 flash memory is rated for a minimum of 10,000 erase/write cycles and guarantees data retention for 20 years at 85°C or 40 years at 25°C, per Texas Instruments SPMS123I datasheet Section 18. Flash sectors can be individually protected against accidental writes using lock bits, and in-application programming is supported via the ROM bootloader or custom firmware routines.
LM3S618-IQN50-C2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 600
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 30
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- A/D 6x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S618-IQN50-C2 FAQ
1.How can I place an order for LM3S618-IQN50-C2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S618-IQN50-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 LM3S618-IQN50-C2 reliable?
The price and inventory of LM3S618-IQN50-C2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S618-IQN50-C2 is usually 5 days.
3.What payment methods are accepted for LM3S618-IQN50-C2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S618-IQN50-C2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S618-IQN50-C2?
LM3S618-IQN50-C2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S618-IQN50-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 LM3S618-IQN50-C2?
For technical support, including LM3S618-IQN50-C2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S618-IQN50-C2 requirements.
6.How does Aetrix verify that LM3S618-IQN50-C2 is sourced from the original manufacturer or authorized distributors?
All LM3S618-IQN50-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 LM3S618-IQN50-C2 meets industry standards.
7.What is the process for return or replacement of LM3S618-IQN50-C2?
All LM3S618-IQN50-C2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S618-IQN50-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 LM3S618-IQN50-C2 part is unused and in its original packaging.
Return procedure for LM3S618-IQN50-C2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S618-IQN50-C2 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…
