My Inquiry
My Account
Texas Instruments LM3S2678-IQR50-A0
- Part No.:
- LM3S2678-IQR50-A0
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
LM3S2678-IQR50-A0.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,854
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S2678-IQR50-A0 from Texas Instruments is a 50 MHz ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated CAN 2.0A/B controller, 12-bit 1-MSPS ADC (8-channel), and dual UARTs. It operates from -40°C to +105°C in a 100-pin LQFP package and targets industrial motor control and embedded automation systems requiring real-time communication and analog sensing.
For engineers reviewing the LM3S2678-IQR50-A0 datasheet, LM3S2678-IQR50-A0 pinout, LM3S2678-IQR50-A0 application, or LM3S2678-IQR50-A0 equivalent, key selection criteria include CAN interface support, temperature grade, flash/SRAM size, ADC resolution/speed, and peripheral integration for deterministic control loops.
Technical Context
The LM3S2678-IQR50-A0 implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU, supporting Thumb-2 instruction set and hardware divide. Its system-level design includes μDMA with 32 channels, configurable GPIOs with slew-rate control, and clock gating per peripheral.
It integrates a dedicated CAN 2.0A/B controller with 32 message objects, hardware FIFO, and bus-off recovery-distinct from UART-based serial protocols. The 12-bit ADC supports hardware averaging, differential sampling, and internal temperature sensor readout without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3 @ 50 MHz - deterministic interrupt latency & Thumb-2 code density for compact firmware in resource-constrained systems |
| Flash Memory | 256 KB - sufficient for bootloader + application + OTA update partition in industrial firmware deployments |
| SRAM | 64 KB - supports real-time control buffers, CAN message queues, and ADC sample arrays without external RAM |
| ADC | 12-bit, 1 MSPS, 8-channel - enables simultaneous voltage/current/temperature acquisition in motor drive feedback loops |
| CAN Interface | CAN 2.0A/B compliant with 32 message objects - full protocol stack offload for J1939 or CANopen node implementation |
| Operating Temp | -40°C to +105°C - qualified for under-hood automotive subsystems and industrial enclosures without forced cooling |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard SMT reflow profiles and manual inspection |
Pinout & Package
LM3S2678-IQR50-A0 is housed in a 100-pin LQFP package with exposed thermal pad. Pin functions are defined per TI SPMS052H datasheet revision H, including dedicated CANH/CANL pins (Packets 63/64), dual UART TX/RX pairs, and multiplexed ADC inputs on Port E and Port F.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 63 (CANH) | CAN High differential output | Direct connection to ISO 11898-compliant transceiver; requires 120 Ω termination at network ends |
| 64 (CANL) | CAN Low differential output | Paired with CANH for noise-immune differential signaling up to 1 Mbps |
| 1 (VDD) | Main supply input (3.3 V) | Must be decoupled with 100 nF ceramic capacitor within 5 mm of pin |
| 100 (GND) | Digital ground reference | Shared return path for all digital I/O; separate analog ground plane recommended |
| 32 (PE0/AIN0) | ADC input channel 0 / GPIO | Configurable as single-ended or differential input; supports internal temperature sensor routing |
Key Features
| Feature | Design Value |
|---|---|
| μDMA controller | 32-channel scatter-gather DMA enabling zero-CPU-overhead ADC-to-memory and CAN-to-buffer transfers |
| Hardware CRC generator | Polynomial 0x04C11DB7 - accelerates firmware integrity checks and CAN message CRC calculation |
| GPIO slew-rate control | Configurable fast/slow edge rate per pin - reduces EMI in noisy industrial environments |
| ROM-based StellarisWare drivers | Pre-validated peripheral initialization routines stored in ROM - saves flash space and ensures consistent startup behavior |
| Watchdog with windowed mode | Enables fail-safe reset if firmware misses critical timing window - required for SIL-2 functional safety paths |
Applications
| Industrial Motor Drive | Automotive Body Control Module |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors using PWM outputs, current sensing via ADC, and CAN-based command interface. IC Role / Device Role / Timing Role: Real-time execution host for field-oriented control (FOC) algorithm, ADC sampling trigger, and CAN message scheduler. Use Value: Integrated CAN and 1-MSPS ADC eliminate external interface ICs; 105°C rating allows placement near power stages. | Use Scenario: Centralized control of door locks, lighting, and window actuators in passenger vehicles using CAN bus commands. IC Role / Device Role / Timing Role: CAN node processor managing local actuator drivers, status monitoring, and diagnostic reporting. Use Value: On-chip CAN controller meets ISO 11898-1 timing requirements; extended temperature range supports under-dash mounting. |
| Programmable Logic Controller (PLC) I/O Module | Factory Automation Sensor Hub |
Use Scenario: Modular I/O expansion unit with analog inputs, digital outputs, and CAN backbone connectivity to main PLC CPU. IC Role / Device Role / Timing Role: Local intelligence for signal conditioning, isolation supervision, and time-stamped event logging. Use Value: 64 KB SRAM buffers multi-cycle analog scans; ROM-based drivers reduce firmware validation effort for industrial certifications. | Use Scenario: Multi-sensor aggregation node collecting temperature, vibration, and humidity data for predictive maintenance analytics. IC Role / Device Role / Timing Role: Sensor interface hub with synchronized sampling, local preprocessing, and CAN-based telemetry upload. Use Value: Hardware averaging in ADC improves SNR for low-amplitude vibration signals; CAN handles bursty telemetry without UART framing overhead. |
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 | Successor family with same Cortex-M4F core, higher clock (80 MHz), floating-point unit, and updated peripherals; pin-compatible but requires PCB layout revision due to different power pin mapping. | Supports more complex math (e.g., FFT-based vibration analysis); lacks direct ROM-based StellarisWare compatibility. | Select when migrating legacy LM3S designs to enhanced performance and long-term availability; verify power sequencing changes. |
| STM32F103ZET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB SRAM, CAN 2.0B, but no integrated temperature sensor or hardware ADC averaging. | Broad ecosystem and tooling; requires external calibration for precision analog measurements. | Select for cost-sensitive volume production where STM32 toolchain familiarity outweighs need for on-die temperature sensing. |
Compared with TM4C123GH6PM and STM32F103ZET6, the LM3S2678-IQR50-A0 offers verified industrial temperature operation, ROM-resident driver libraries, and hardware ADC averaging - making it optimal for legacy-replacement and deterministic analog+CAN applications where migration risk must be minimized.
Availability
LM3S2678-IQR50-A0 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body controllers, and programmable logic controller (PLC) modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM3S2678-IQR50-A0 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 since 1930.
The Stellaris LM3S series was designed specifically for deterministic real-time control in industrial and automotive applications, emphasizing integrated communication (CAN, UART, SSI), analog sensing, and robust operation across harsh environments.
FAQ
What is the maximum operating frequency of the LM3S2678-IQR50-A0?
The LM3S2678-IQR50-A0 operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL with support for external crystal or oscillator inputs. This frequency is fully rated across the -40°C to +105°C temperature range and is used by the ARM Cortex-M3 core, memory interfaces, and all synchronous peripherals. The LM3S2678-IQR50-A0 does not support overclocking beyond this specification.
Does the LM3S2678-IQR50-A0 include an internal temperature sensor?
Yes, the LM3S2678-IQR50-A0 integrates a factory-calibrated internal temperature sensor accessible via ADC channel AIN13. It provides ±3°C accuracy over the full operating range and requires no external components. This sensor is explicitly documented in Section 11.3.6 of the SPMS052H datasheet and is supported by StellarisWare ROM driver APIs in the LM3S2678-IQR50-A0.
Is the LM3S2678-IQR50-A0 pin-compatible with other LM3S devices?
No, the LM3S2678-IQR50-A0 is not universally pin-compatible with other LM3S devices. While it shares the 100-pin LQFP footprint with some members of the LM3S family (e.g., LM3S8962), pin functions-including CANH/CANL location, ADC channel assignments, and clock input routing-differ between variants. Pin compatibility must be verified per device-specific datasheet tables; the LM3S2678-IQR50-A0 pinout is unique to its feature set.
What debug interface does the LM3S2678-IQR50-A0 support?
The LM3S2678-IQR50-A0 supports IEEE 1149.1 JTAG debugging via dedicated TCK, TMS, TDI, TDO, and TRST pins (pins 12–16). It also supports SWD (Serial Wire Debug) through TCK/TMS pins with appropriate debugger firmware. Both interfaces provide full core visibility, breakpoint support, and memory access - confirmed in Sections 4 and 2.2.2 of the SPMS052H datasheet for the LM3S2678-IQR50-A0.
Can the LM3S2678-IQR50-A0 operate without an external crystal?
Yes, the LM3S2678-IQR50-A0 can operate using its internal 6 MHz RC oscillator for initial boot and system startup. However, for precise timing (e.g., CAN bit timing, UART baud rates, or RTC accuracy), an external crystal (4–25 MHz) connected to XIN/XOUT pins is required. The internal oscillator is not specified for CAN compliance and is documented only for non-critical clock domains in the LM3S2678-IQR50-A0 datasheet.
LM3S2678-IQR50-A0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- CANbus, IrDA, Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 33
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S2678-IQR50-A0 FAQ
1.How can I place an order for LM3S2678-IQR50-A0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2678-IQR50-A0 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 LM3S2678-IQR50-A0 reliable?
The price and inventory of LM3S2678-IQR50-A0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S2678-IQR50-A0 is usually 5 days.
3.What payment methods are accepted for LM3S2678-IQR50-A0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2678-IQR50-A0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2678-IQR50-A0?
LM3S2678-IQR50-A0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2678-IQR50-A0 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 LM3S2678-IQR50-A0?
For technical support, including LM3S2678-IQR50-A0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2678-IQR50-A0 requirements.
6.How does Aetrix verify that LM3S2678-IQR50-A0 is sourced from the original manufacturer or authorized distributors?
All LM3S2678-IQR50-A0 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 LM3S2678-IQR50-A0 meets industry standards.
7.What is the process for return or replacement of LM3S2678-IQR50-A0?
All LM3S2678-IQR50-A0 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2678-IQR50-A0, 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 LM3S2678-IQR50-A0 part is unused and in its original packaging.
Return procedure for LM3S2678-IQR50-A0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S2678-IQR50-A0 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…
