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Texas Instruments LM3S2918-EQC50-A2T
- Part No.:
- LM3S2918-EQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2918-EQC50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,314
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Product details
Overview
LM3S2918-EQC50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated CAN 2.0A/B controller, 12-bit ADC (up to 1 MSPS), and hibernation module for ultra-low-power operation. It operates at up to 50 MHz and targets motor control, industrial automation, and embedded systems requiring real-time responsiveness and robust communication.
For engineers reviewing the LM3S2918-EQC50-A2T datasheet, LM3S2918-EQC50-A2T pinout, LM3S2918-EQC50-A2T application, or LM3S2918-EQC50-A2T equivalent, key selection criteria include its integrated CAN interface, hibernation power management, 50 MHz Cortex-M3 core, dual UARTs with IrDA support, and 12-bit ADC with hardware averaging - all in a 100-pin LQFP package.
Technical Context
The LM3S2918-EQC50-A2T implements the ARM Cortex-M3 processor core with Thumb-2 instruction set, NVIC with 64 interrupt lines, and SysTick timer. Its system-level architecture includes a memory protection unit (MPU), bit-band aliasing, and deterministic interrupt latency under 12 cycles.
Peripherals are tightly coupled via the AHB/APB bus matrix: the CAN module supports full CAN 2.0A/B protocol with 32 message objects; the hibernation module integrates RTC, battery-backed RAM, and wake-on-RTC/external-pin events; and the ADC features four sample sequencers with programmable trigger sources and 16-sample hardware averaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, runs at up to 50 MHz - enables deterministic real-time execution with <12-cycle interrupt latency. |
| Flash Memory | 256 KB on-chip flash with 128-bit wide interface - supports in-application programming and secure code storage. |
| SRAM | 64 KB single-cycle SRAM - sufficient for real-time control stacks, buffers, and firmware variables without external memory. |
| ADC | 12-bit SAR ADC, 1 MSPS max sampling rate, 8-channel input, 4 independent sequencers - supports simultaneous analog monitoring in motor control loops. |
| CAN Interface | Dedicated CAN 2.0A/B controller with 32 message objects and FIFO buffering - enables robust fieldbus communication in industrial networks. |
| Hibernation Module | Integrated RTC, 2 KB battery-backed RAM, wake-on-RTC/external-pin - reduces system standby power to ~1.7 µA typical. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard PCB assembly processes and thermal management for industrial environments. |
Pinout & Package
LM3S2918-EQC50-A2T is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with exposed thermal pad, RoHS-compliant, rated for –40°C to +105°C operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Digital (VDD), analog (VDDA), and core (VDDC) rails - require separate filtering to minimize noise coupling into ADC and PLL. |
| GND, GNDA, GNDC | Ground returns | Analog ground (GNDA) must be isolated from digital ground until single-point connection to avoid ADC offset errors. |
| PD0–PD7, PE0–PE5, PF0–PF4, etc. | GPIO pins with alternate functions | Multi-function pins support UART, SSI, I²C, PWM, and CAN signals - configured via GPIOAFSEL and GPIODEN registers. |
| CAN0RX / CAN0TX | CAN physical layer interface | Dedicated differential-capable pins for CAN transceiver connection - require external 120 Ω termination and common-mode choke per ISO 11898-2. |
| HIBRST, HIBACK | Hibernation module control | HIBRST asserts reset during hibernate exit; HIBACK confirms hibernate mode entry - used for low-power state coordination. |
| USB0VBUS, USB0ID | USB OTG detection | Supports USB device/host negotiation - not present on all variants; LM3S2918-EQC50-A2T does not include USB PHY or controller. |
Key Features
| Feature | Design Value |
|---|---|
| ARM Cortex-M3 core with NVIC | Enables prioritized, vectored interrupt handling with sub-12-cycle latency - critical for time-critical motor commutation and fault response. |
| Integrated CAN 2.0A/B controller | Eliminates need for external CAN controller and glue logic - reduces BOM count and PCB area in industrial control nodes. |
| Hibernation module with RTC & battery-backed RAM | Allows full system retention at ~1.7 µA - extends battery life in remote sensors and portable diagnostic tools. |
| 12-bit ADC with hardware averaging | Delivers effective 13.5-bit resolution via 16-sample averaging - improves signal-to-noise ratio in noisy industrial voltage/current sensing. |
| Dual UARTs with IrDA and SIR support | Enables legacy serial diagnostics and infrared remote interfaces without external transceivers - simplifies field service and configuration. |
Applications
| Industrial Motor Control | Building Automation Controller |
|---|---|
Use Scenario: Closed-loop control of BLDC motors using hall-effect feedback and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms, ADC sampling of phase currents, and generation of synchronized 3-phase PWM outputs. Use Value: Deterministic 50 MHz Cortex-M3 timing and dedicated PWM peripherals enable precise 20 kHz switching with <1 µs jitter - reducing torque ripple and audible noise. | Use Scenario: Central HVAC controller managing temperature zones, damper actuators, and CO₂ sensors across multi-floor buildings. IC Role / Device Role / Timing Role: CAN bus node aggregating sensor data and issuing actuator commands while maintaining local decision logic during network outages. Use Value: Integrated CAN 2.0B and hibernation module allow reliable fieldbus communication and battery-backed event logging - ensuring compliance with ASHRAE 135 (BACnet) interoperability requirements. |
| Portable Diagnostic Tool | Smart Energy Meter Interface |
Use Scenario: Handheld tool for reading vehicle OBD-II data via CAN and displaying results on an LCD with battery backup. IC Role / Device Role / Timing Role: CAN protocol interpreter, low-power system manager, and display controller interface hub. Use Value: On-chip hibernation with 2 KB battery-backed RAM retains last scan session and calibration data - enabling instant resume after 30-day storage without recharge. | Use Scenario: Two-way communication module in DIN-rail energy meters, interfacing with metrology ICs and upstream PLC or RF mesh networks. IC Role / Device Role / Timing Role: Isolated data concentrator translating SPI-based metrology data to CAN or RS-485 for AMI infrastructure. Use Value: Dual UARTs with hardware flow control and 12-bit ADC for auxiliary voltage monitoring meet IEC 62056-21 and ANSI C12.22 security and timing requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S2678-IQC50-A2 | Same Cortex-M3 core and peripheral set, but lacks hibernation module and has only 128 KB flash. | Suitable for cost-sensitive motor drives where ultra-low-power sleep is unnecessary. | Select LM3S2678-IQC50-A2 when BOM cost reduction is prioritized over battery-backed RTC functionality. |
| TMS570LS0432PZT | ARM Cortex-R4F safety MCU with dual-core lockstep, 3 MB flash, and ASIL-B certification - no hibernation module. | Targeted at automotive safety-critical systems (e.g., EPS, braking), not industrial automation. | Choose TMS570LS0432PZT only if ISO 26262 functional safety compliance is mandatory. |
Compared with LM3S2678-IQC50-A2 and TMS570LS0432PZT, the LM3S2918-EQC50-A2T uniquely balances industrial-grade CAN connectivity, hibernation-aware power management, and deterministic real-time performance - making it optimal for non-safety-critical, battery-constrained embedded controllers where peripheral integration reduces system complexity.
Availability
LM3S2918-EQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, building automation, portable diagnostics, and smart metering applications requiring stable component supply and long-term lifecycle support.
Supply support for LM3S2918-EQC50-A2T 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 family was designed specifically for cost-sensitive, real-time industrial and consumer embedded applications - emphasizing peripheral integration, low-power operation, and ARM Cortex-M3 software compatibility.
FAQ
What is the maximum operating frequency of the LM3S2918-EQC50-A2T?
The LM3S2918-EQC50-A2T operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL or external crystal oscillator. This speed is guaranteed across the full industrial temperature range (–40°C to +105°C) and supports real-time execution of motor control algorithms and communication stacks without external clock scaling.
Does the LM3S2918-EQC50-A2T include a USB interface?
No, the LM3S2918-EQC50-A2T does not include a USB controller or PHY. Unlike higher-end Stellaris variants (e.g., LM3S8962), this part omits USB functionality to reduce cost and die size. Communication is supported via UART, SSI, I²C, and CAN interfaces only.
What is the purpose of the hibernation module in the LM3S2918-EQC50-A2T?
The hibernation module in the LM3S2918-EQC50-A2T provides ultra-low-power state management with integrated RTC, 2 KB battery-backed RAM, and wake-on-RTC/external-pin capability. It allows the LM3S2918-EQC50-A2T to maintain system context and timekeeping at ~1.7 µA, enabling extended battery life in portable and remote monitoring applications.
How many CAN message objects does the LM3S2918-EQC50-A2T support?
The LM3S2918-EQC50-A2T supports 32 fully configurable CAN message objects, each with dedicated ID masking, direction control, and data length settings. These objects are managed by hardware FIFOs and can be assigned to transmit, receive, or self-reception modes - enabling complex CAN network node behavior without CPU overhead.
Is the LM3S2918-EQC50-A2T pin-compatible with other Stellaris LM3S devices?
No, the LM3S2918-EQC50-A2T is not universally pin-compatible with other LM3S devices. While it shares the 100-pin LQFP footprint with several variants (e.g., LM3S2678), differences in peripheral mapping, power pin allocation, and hibernation-specific signals (e.g., HIBRST, HIBACK) require board-level validation before substitution.
LM3S2918-EQC50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- CANbus, I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S2918-EQC50-A2T FAQ
1.How can I place an order for LM3S2918-EQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2918-EQC50-A2T 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 LM3S2918-EQC50-A2T reliable?
The price and inventory of LM3S2918-EQC50-A2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S2918-EQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S2918-EQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2918-EQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2918-EQC50-A2T?
LM3S2918-EQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2918-EQC50-A2T 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 LM3S2918-EQC50-A2T?
For technical support, including LM3S2918-EQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2918-EQC50-A2T requirements.
6.How does Aetrix verify that LM3S2918-EQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S2918-EQC50-A2T 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 LM3S2918-EQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S2918-EQC50-A2T?
All LM3S2918-EQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2918-EQC50-A2T, 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 LM3S2918-EQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S2918-EQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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