My Inquiry
My Account
Texas Instruments LM3S2911-EQC50-A2
- Part No.:
- LM3S2911-EQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2911-EQC50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,675
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S2911-EQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated CAN 2.0A/B controller, hibernation module with RTC and battery-backed memory, and operates at up to 50 MHz. It targets industrial motor control and embedded automation where deterministic real-time response, low-power hibernation, and robust fieldbus connectivity are required.
For engineers reviewing the LM3S2911-EQC50-A2 datasheet, LM3S2911-EQC50-A2 pinout, LM3S2911-EQC50-A2 application, or LM3S2911-EQC50-A2 equivalent, key selection criteria include its 50 MHz CPU clock, dual UARTs with IrDA/SIR support, 8-channel 10-bit ADC, 4× general-purpose timers (including RTC-capable), and QFP-100 package with 70 GPIOs.
Technical Context
The LM3S2911-EQC50-A2 implements the ARMv7-M architecture with NVIC supporting 48 configurable interrupts, SysTick timer, and MPU for memory protection. Its system-level peripherals include a hibernation module with dedicated 32.768 kHz RTC oscillator input, battery-backed 2 KB SRAM, and wake-on-RTC-match or external pin capability.
Motor control functionality is enabled via PWM-capable timers with dead-band generation, while communication is supported by one CAN 2.0A/B controller, two UARTs (one with IrDA), one SSI, and one I²C interface - all independently clocked and interrupt-mapped to the NVIC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, supports Thumb-2 instruction set and hardware divide |
| Max Clock Speed | 50 MHz - enables real-time loop execution ≤20 ns per cycle for motor control timing |
| Flash / RAM | 256 KB on-chip flash (with 128-bit wide bus) and 64 KB SRAM - sufficient for bootloader + application + data buffers |
| ADC | 8-channel 10-bit SAR ADC with programmable sample rate up to 1 MSPS - suitable for analog sensor acquisition in PLC I/O modules |
| CAN Interface | One CAN 2.0A/B controller with 32 message objects, TX/RX FIFOs, and bit-rate programmability - meets industrial fieldbus timing requirements |
| Hibernation Module | Integrated hibernate controller with RTC, battery-backed 2 KB SRAM, and wake-on-RTC/external-pin - enables sub-µA sleep for battery-powered gateways |
| Timers | Four 32/16-bit GPTMs: two 32-bit (one RTC-capable), two 16-bit (PWM-capable) - supports motor phase timing, pulse counting, and periodic housekeeping |
Pinout & Package
LM3S2911-EQC50-A2 is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm pitch, 14 × 14 mm body size, and exposed thermal pad. Pinout validated per TI SPMS057I datasheet Rev I (July 2014), Table 4-1 (Pin Assignments) and Figure 4-1 (Pin Diagram).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA / VDDC | Power supply inputs | Separate digital (VDD), analog (VDDA), and core (VDDC) rails enable noise isolation for ADC and PLL operation |
| GND / GNDA / GNDC | Ground returns | Dedicated analog (GNDA) and core (GNDC) grounds reduce coupling into sensitive circuits |
| OSC0 / OSC1 | Primary crystal oscillator terminals | Supports 1–25 MHz crystal; internal oscillator can drive system clock directly or feed PLL |
| HIBERNATE_RTCCLK | Hibernation module clock input | Accepts 32.768 kHz external crystal for accurate RTC timekeeping during deep sleep |
| CAN0RX / CAN0TX | CAN physical layer interface | Differential receive/transmit pins for ISO 11898-1 compliant CAN bus connection without transceiver biasing |
| UART0RX / UART0TX | Asynchronous serial interface | Full-duplex UART with IrDA encoder/decoder and programmable baud rate generator |
| SSI0CLK / SSI0FSS / SSI0RX / SSI0TX | Synchronous serial interface | Four-wire SPI-compatible interface supporting master/slave modes and FIFO buffering |
| I2C0SCL / I2C0SDA | I²C bus interface | Open-drain bidirectional lines with slew-rate control and glitch filtering for noise-immune sensor communication |
Key Features
| Feature | Design Value |
|---|---|
| ARM Cortex-M3 Core | Single-cycle MAC, hardware divide, 3-stage pipeline, and 1.25 DMIPS/MHz efficiency - delivers deterministic 62.5 MIPS at 50 MHz |
| Hibernation Module | Sub-µA hibernate current with RTC running from external 32.768 kHz source and 2 KB battery-backed SRAM - enables years of operation on coin cell |
| CAN 2.0A/B Controller | 32 message objects, programmable acceptance filtering, and automatic retransmission - reduces host CPU load in distributed control networks |
| ADC with Analog Comparator | 8-channel 10-bit ADC with 1 MSPS sampling and integrated analog comparators with selectable reference - supports overcurrent detection and threshold monitoring |
| Peripheral Integration | Two UARTs (one with IrDA), one SSI, one I²C, four GPTMs, watchdog, and GPIO with maskable interrupts - eliminates need for external glue logic |
Applications
| Industrial Motor Control | Building Automation Gateway |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC actuators using PWM outputs, current sensing via ADC, and position feedback. IC Role / Device Role / Timing Role: Real-time motion controller executing FOC algorithms, managing CAN-based command distribution, and synchronizing PWM edges with ADC sampling. Use Value: Integrated hibernation allows firmware updates during maintenance windows without power interruption; CAN interface ensures interoperability with BACnet MS/TP gateways. | Use Scenario: Protocol translation between Modbus RTU (RS-485) and BACnet/IP in smart thermostats and lighting controllers. IC Role / Device Role / Timing Role: Edge protocol gateway with UART-driven RS-485 transceivers, Ethernet offload via external PHY, and time-stamped event logging. Use Value: On-chip RTC and battery-backed SRAM retain schedule data and fault logs across AC power loss; dual UARTs enable simultaneous Modbus master/slave operation. |
| Programmable Logic Controller (PLC) I/O Module | Remote Terminal Unit (RTU) |
Use Scenario: Digital and analog I/O expansion for DIN-rail mounted PLCs, handling 16-channel DI/DO and 4-channel AI with isolation. IC Role / Device Role / Timing Role: Local intelligence node managing signal conditioning, debounce, scaling, and CAN-based backplane communication to main CPU. Use Value: 70 GPIOs with configurable pull-up/down and slew rate control simplify board layout; 10-bit ADC with hardware averaging improves noise immunity in factory EMI environments. | Use Scenario: Solar-powered telemetry unit collecting tank level, temperature, and flow data in water/wastewater infrastructure. IC Role / Device Role / Timing Role: Low-power data concentrator with hibernation between sensor reads, CAN bus reporting to SCADA master, and watchdog-triggered recovery. Use Value: Sub-µA hibernate current extends battery life to >5 years; integrated CAN eliminates need for external CAN controller and reduces BOM count. |
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 device with same Cortex-M4F core, 80 MHz, 256 KB flash, 32 KB SRAM, no hibernation module but enhanced USB and Ethernet support | Better suited for USB-host or Ethernet-connected edge devices; lacks battery-backed RTC memory and ultra-low-power hibernate mode | Select TM4C123GH6PM when higher CPU performance or USB/Ethernet integration is required and hibernation is not critical |
| STM32F103VCT6 | ARM Cortex-M3 at 72 MHz, 256 KB flash, 48 KB SRAM, CAN 2.0B, but no integrated hibernation or battery-backed memory | Stronger analog peripheral set (12-bit ADC, DAC), wider temperature range (–40°C to +105°C), but requires external RTC for timekeeping | Select STM32F103VCT6 when higher ADC resolution or extended temperature operation is needed and external RTC is acceptable |
Compared with TM4C123GH6PM and STM32F103VCT6, the LM3S2911-EQC50-A2 uniquely provides integrated hibernation with battery-backed SRAM and RTC - making it optimal for energy-constrained, time-critical field devices where zero-power retention and deterministic wake-up are mandatory.
Availability
LM3S2911-EQC50-A2 is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, PLC I/O modules, and remote terminal units requiring stable component supply and long-term lifecycle support.
Supply support for LM3S2911-EQC50-A2 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 and embedded processing solutions for industrial, automotive, and consumer markets since 1930.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time industrial control applications requiring integrated CAN, hibernation, and deterministic Cortex-M3 performance - preceding the Tiva C line with focus on fieldbus-ready microcontrollers.
FAQ
What is the maximum operating frequency of the LM3S2911-EQC50-A2?
The LM3S2911-EQC50-A2 operates at a maximum system clock frequency of 50 MHz, achieved via internal PLL multiplication of the primary oscillator or external clock source. This speed is specified under industrial temperature range (–40°C to +85°C) and 3.3 V supply conditions per TI SPMS057I datasheet Section 5.2.4. The LM3S2911-EQC50-A2 maintains full peripheral functionality-including CAN, ADC, and timers-at this rated frequency.
Does the LM3S2911-EQC50-A2 support CAN FD or only classical CAN?
The LM3S2911-EQC50-A2 supports only Classical CAN (CAN 2.0A/B) with bit rates up to 1 Mbps, as confirmed in Section 14.3 of the SPMS057I datasheet. It does not implement CAN FD features such as flexible data-rate, extended data length, or CRC enhancements. The LM3S2911-EQC50-A2's CAN controller is fully compatible with ISO 11898-1 and supports both standard (11-bit) and extended (29-bit) identifiers.
What power modes does the LM3S2911-EQC50-A2 support, and what is hibernate current?
The LM3S2911-EQC50-A2 supports Sleep, Deep-Sleep, and Hibernate modes. In Hibernate mode-with RTC running from a 32.768 kHz external crystal and 2 KB SRAM retained-the typical current is 1.7 µA, as measured per Section 6.3.6 of the SPMS057I datasheet. The LM3S2911-EQC50-A2 achieves this ultra-low power state using dedicated hibernate domain circuitry independent of main VDD.
How many ADC channels and what resolution does the LM3S2911-EQC50-A2 provide?
The LM3S2911-EQC50-A2 integrates an 8-channel, 10-bit successive-approximation (SAR) ADC with programmable sample rate up to 1 MSPS. Each channel supports software or hardware trigger sources, and conversion results are stored in a 16-deep FIFO. This ADC configuration is documented in Section 15 of the SPMS057I datasheet and is used by the LM3S2911-EQC50-A2 for analog sensor interfacing in industrial control loops.
Is the LM3S2911-EQC50-A2 pin-compatible with other Stellaris LM3S devices?
The LM3S2911-EQC50-A2 uses a 100-pin LQFP package (EQC suffix) and shares pinout compatibility only with other LM3S29xx variants in the same EQC package family-such as LM3S2938 and LM3S2965-as verified in TI's LM3S29xx Pinout Compatibility Guide (SLAS629). It is not pin-compatible with LM3S1xxx or LM3S8xxx devices due to differing peripheral mappings and power pin allocations.
LM3S2911-EQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-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, I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 60
- 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:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S2911-EQC50-A2 FAQ
1.How can I place an order for LM3S2911-EQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2911-EQC50-A2 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 LM3S2911-EQC50-A2 reliable?
The price and inventory of LM3S2911-EQC50-A2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S2911-EQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S2911-EQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2911-EQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2911-EQC50-A2?
LM3S2911-EQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2911-EQC50-A2 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 LM3S2911-EQC50-A2?
For technical support, including LM3S2911-EQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2911-EQC50-A2 requirements.
6.How does Aetrix verify that LM3S2911-EQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S2911-EQC50-A2 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 LM3S2911-EQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S2911-EQC50-A2?
All LM3S2911-EQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2911-EQC50-A2, 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 LM3S2911-EQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S2911-EQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S2911-EQC50-A2 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…
