My Inquiry
My Account
Texas Instruments LM3S6911-EQC50-A2
- Part No.:
- LM3S6911-EQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S6911-EQC50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,349
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S6911-EQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated Ethernet MAC, dual UARTs, I²C, SSI, analog comparators, and hibernation module. It operates at 50 MHz and supports industrial motor control and networked embedded systems requiring deterministic real-time response.
For engineers reviewing the LM3S6911-EQC50-A2 datasheet, LM3S6911-EQC50-A2 pinout, LM3S6911-EQC50-A2 application, or LM3S6911-EQC50-A2 equivalent, key selection criteria include Ethernet MAC integration, hibernation power management, 50 MHz Cortex-M3 performance, and 100-pin LQFP package compatibility with StellarisWare firmware support.
Technical Context
The LM3S6911-EQC50-A2 implements the ARMv7-M architecture with NVIC, SysTick, MPU, and debug interfaces (JTAG). Its system-level design integrates a dedicated hibernation module with RTC, battery-backed memory, and wake-up sources - enabling sub-1 µA sleep current while retaining state.
Peripherals include a full Ethernet MAC (MII interface), two UARTs with IrDA/SIR support, one I²C master/slave controller, two SSI modules, eight GPIO ports, four general-purpose timers (including RTC mode), and two analog comparators with internal voltage reference - all clocked from a programmable PLL-driven system clock up to 50 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, Thumb-2 instruction set, 50 MHz max operation |
| Memory | 256 KB on-chip flash (programmable in 1 KB sectors), 64 KB SRAM |
| Package | 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant |
| Operating Voltage | 3.0 V to 3.6 V supply; supports brown-out reset and power monitoring |
| Hibernate Current | ≤1.1 µA typical with RTC active and battery-backed RAM retained |
| Ethernet Interface | Integrated MAC layer only (no PHY); requires external MII-compatible PHY |
| Real-Time Clock | Dedicated hibernation-module RTC with calendar support and alarm interrupt |
Pinout & Package
LM3S6911-EQC50-A2 is housed in a 100-pin LQFP package (JEDEC MO-140AC) with exposed thermal pad. Pin functions are multiplexed across eight GPIO ports (Port A–H), each supporting configurable digital I/O, interrupts, and peripheral mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate domains for digital core (VDDC), analog (VDDA), and I/O (VDD); decoupling required per datasheet layout guidelines |
| GND, GNDA, GNDC | Ground returns | Isolated analog/digital/thermal ground planes recommended to minimize noise coupling |
| PD0–PD7, PE0–PE5, PF0–PF4, PG0–PG7, PH0–PH3 | GPIO port pins | Configurable as digital I/O, UART/SSI/I²C signals, timer inputs/outputs, or comparator inputs; 5 V tolerant on select pins |
| RMII0_TXD0/RMII0_TXD1 | Ethernet MAC transmit data | Direct connection to RMII-compliant PHY; no external level-shifting needed |
| RMII0_CRS_DV | Ethernet carrier sense/data valid | Input from PHY indicating valid frame reception or carrier presence |
| HIB_RTCCLK | Hibernation module clock input | Accepts 32.768 kHz crystal or external clock for RTC and hibernate timing |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Enables ultra-low-power sleep (≤1.1 µA) with RTC, battery-backed RAM, and wake-on-RTC-alarm or external pin |
| Ethernet MAC Integration | Reduces BOM count by eliminating external MAC IC; supports MII/RMII; compatible with TI DP83848 and similar PHYs |
| Peripheral Multiplexing | Single pin supports up to 8 alternate functions (e.g., UART0RX, SSI0CLK, I²C1SDA, Timer1, GPIO); controlled via GPIO AFSEL register |
| StellarisWare Support | Firmware library includes drivers, USB stack, file system, and Ethernet TCP/IP stack (uIP/LwIP) optimized for LM3S6911 |
| Debug & Trace | Full JTAG interface with SWD support, hardware breakpoints, watchpoints, and TPIU trace output for real-time code profiling |
Applications
| Industrial Motor Control | Networked Sensor Node |
|---|---|
Use Scenario: Closed-loop BLDC motor drive with position feedback, current sensing, and remote configuration over Ethernet. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, managing PWM generation via GPIO-timed outputs, and handling EtherNet/IP messaging. Use Value: Integrated Ethernet MAC eliminates external MAC+PHY, reducing latency and PCB area; hibernation enables low-power standby between motion cycles. | Use Scenario: Distributed environmental monitor collecting temperature/humidity/pressure data and transmitting via Modbus TCP over industrial Ethernet. IC Role / Device Role / Timing Role: System-on-chip host processing sensor ADC readings, formatting packets, and managing Ethernet link layer timing. Use Value: 256 KB flash stores protocol stack + application logic; RTC in hibernation module enables scheduled wake-up for periodic reporting without external timer. |
| Building Automation Gateway | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: Protocol translator bridging BACnet MS/TP field devices to BACnet/IP backbone using Ethernet. IC Role / Device Role / Timing Role: Protocol gateway CPU running dual-stack BACnet implementation with UART-to-Ethernet packet forwarding. Use Value: Dual UARTs support simultaneous MS/TP and debug interfaces; 64 KB SRAM accommodates dual protocol buffers and real-time scheduling. | Use Scenario: DIN-rail mounted I/O expansion module with 16 digital inputs, 8 relay outputs, and EtherNet/IP CIP connection. IC Role / Device Role / Timing Role: Deterministic I/O controller synchronizing input sampling and output updates to Ethernet cycle time (e.g., 1 ms). Use Value: Cortex-M3 NVIC ensures sub-1 µs interrupt latency; GPIO commit registers prevent metastability during high-speed I/O toggling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S6965-EQC50-A2 | Same package and core; adds CAN controller and USB device interface; 96 KB SRAM vs. 64 KB | Required for CAN bus integration or USB HID/class-compliant peripheral roles | Select when CAN or USB connectivity is mandatory; otherwise LM3S6911-EQC50-A2 offers lower cost and smaller footprint for Ethernet-only designs |
| TM4C123GH6PM | Successor family; 80 MHz Cortex-M4F, 256 KB flash, 32 KB SRAM, integrated PHY option, enhanced peripherals | Supports floating-point math, higher throughput, and newer industrial protocols (e.g., PROFINET) | Choose TM4C123GH6PM for new designs needing higher performance or long-term availability; LM3S6911-EQC50-A2 remains viable for legacy maintenance or cost-sensitive Ethernet gateways |
Compared with LM3S6965-EQC50-A2, the LM3S6911-EQC50-A2 omits CAN/USB but reduces BOM cost and simplifies layout; versus TM4C123GH6PM, it trades 30 MHz speed and FPU for proven stability in mature industrial deployments where Ethernet MAC + hibernation suffices.
Availability
LM3S6911-EQC50-A2 is available at Aetrix Electronics and suitable for industrial motor control, networked sensor nodes, building automation gateways, and PLC I/O modules requiring stable component supply and long-lifecycle support.
Supply support for LM3S6911-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, specializing in analog, embedded processing, and wireless technologies since 1930.
The Stellaris LM3S series was designed as the first ARM Cortex-M3-based microcontroller family for industrial and automotive applications, emphasizing real-time determinism, low-power hibernation, and integrated communication peripherals.
FAQ
Does LM3S6911-EQC50-A2 include an integrated Ethernet PHY?
No, the LM3S6911-EQC50-A2 integrates only the Ethernet MAC layer. An external PHY (e.g., TI DP83848 or Microchip LAN8720) must be used with MII or RMII interface. The device provides all necessary MAC control signals including TXD, RXD, CRS_DV, TX_EN, and REF_CLK, but does not generate or receive physical-layer signals directly.
What is the minimum supply voltage for LM3S6911-EQC50-A2 during hibernation mode?
The LM3S6911-EQC50-A2 supports hibernation down to 1.65 V on VDD and VDDA, provided the hibernation module is powered from a backup source (VBAT) or regulated auxiliary supply. At 3.0 V nominal, hibernation current is ≤1.1 µA with RTC and 2 KB battery-backed RAM active - verified per SPMS139I datasheet Section 6.3.6.
Can LM3S6911-EQC50-A2 operate without an external crystal?
Yes, the LM3S6911-EQC50-A2 can run from its internal 6 MHz RC oscillator for basic operation, but Ethernet, USB (on other variants), and precise RTC functionality require external crystals: 32.768 kHz for hibernation module and 1–25 MHz for main system clock. The PLL supports multiplication up to 50 MHz from these sources.
How many UARTs does LM3S6911-EQC50-A2 support, and do they include hardware flow control?
The LM3S6911-EQC50-A2 supports two UARTs (UART0 and UART1), each with full RTS/CTS hardware flow control, FIFO buffering (16-byte depth), IrDA encoding, and programmable baud rates. Pins are multiplexed on Port A and Port C, and both UARTs are accessible in all operating modes including hibernation wake-up sequences.
Is LM3S6911-EQC50-A2 pin-compatible with other LM3S69xx variants?
Yes, the LM3S6911-EQC50-A2 shares identical 100-pin LQFP packaging and pinout with LM3S6965-EQC50-A2 and LM3S6965-IQC50-A2. Peripheral signal assignments (e.g., UART0, SSI0, I²C0, Ethernet) match exactly; differences are internal (CAN/USB presence, SRAM size) and do not affect PCB layout or interconnect design.
LM3S6911-EQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 6000
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- Ethernet, I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 46
- 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:
LM3S6911-EQC50-A2 FAQ
1.How can I place an order for LM3S6911-EQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S6911-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 LM3S6911-EQC50-A2 reliable?
The price and inventory of LM3S6911-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 LM3S6911-EQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S6911-EQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S6911-EQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S6911-EQC50-A2?
LM3S6911-EQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S6911-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 LM3S6911-EQC50-A2?
For technical support, including LM3S6911-EQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S6911-EQC50-A2 requirements.
6.How does Aetrix verify that LM3S6911-EQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S6911-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 LM3S6911-EQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S6911-EQC50-A2?
All LM3S6911-EQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S6911-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 LM3S6911-EQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S6911-EQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S6911-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…
