My Inquiry
My Account
Texas Instruments LM3S6918-IQC50-A2T
- Part No.:
- LM3S6918-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S6918-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,338
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S6918-IQC50-A2T 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, ADC (10-bit, 8-channel), and hibernation module. It operates at 50 MHz and supports industrial temperature range (–40°C to +85°C) in a 100-pin LQFP package. Used in networked industrial controllers requiring real-time control and wired connectivity.
For engineers reviewing the LM3S6918-IQC50-A2T datasheet, LM3S6918-IQC50-A2T pinout, LM3S6918-IQC50-A2T application, or LM3S6918-IQC50-A2T equivalent, key selection criteria include Ethernet MAC integration, hibernation power management, 50 MHz Cortex-M3 performance, and industrial-grade thermal rating - all verified in TI's SPMS140I production datasheet dated July 2014.
Technical Context
The LM3S6918-IQC50-A2T implements the ARMv7-M architecture with NVIC, SysTick, MPU, and debug support via JTAG/SWD. Its system-level design integrates a dedicated Ethernet MAC (MII interface, no PHY), enabling deterministic packet handling without external controller overhead.
Peripherals include a hibernation module with RTC, battery-backed memory, and wake-on-RTC/external-pin capability; dual 16550-compatible UARTs with FIFOs; and an 8-channel, 1-MSPS ADC with hardware averaging - all clocked from a configurable PLL-driven system clock up to 50 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, 50 MHz max operation - enables deterministic real-time task scheduling and Thumb-2 instruction efficiency. |
| Memory | 256 KB on-chip flash (programmable in 1-KB blocks), 64 KB SRAM - sufficient for standalone Ethernet protocol stacks and control firmware. |
| Temperature Range | –40°C to +85°C (industrial grade) - validated for deployment in uncontrolled cabinet environments. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard surface-mount reflow and test fixtures. |
| Ethernet Interface | Integrated MAC with MII interface - requires external PHY but eliminates host-CPU packet framing overhead. |
| ADC | 10-bit, 8-channel SAR ADC with 1 MSPS sample rate and hardware averaging - supports analog sensor acquisition in motor control feedback loops. |
| Hibernation Module | RTC, battery-backed RAM (2 KB), wake-on-RTC/external-pin - reduces system standby power to < 10 µA with time-stamped event recovery. |
Pinout & Package
LM3S6918-IQC50-A2T is housed in a 100-pin LQFP (Pb-free, RoHS-compliant) with exposed thermal pad. Pin functions are defined per TI SPMS140I datasheet Section 5.1 and GPIO register mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Digital core (VDD), analog (VDDA), and internal regulator (VDDC) rails - require separate 3.3 V filtering per datasheet layout guidelines. |
| PD0–PD7, PE0–PE5, PF0–PF4, PG0–PG7, PH0–PH7, PK0–PK7, PL0–PL7, PM0–PM7, PN0–PN7, PP0–PP7, PQ0–PQ7 | GPIO banks | Configurable digital I/O with slew-rate control, weak pull-up/down, and interrupt capability - mapped to 88 total GPIO pins across 11 ports. |
| PA0–PA7, PB0–PB7, PC0–PC7 | Peripheral function multiplexing | Shared with UART0/1, SSI0/1, I²C0/1, ADC0, PWM, CAN, Ethernet MII - e.g., PA0–PA7 = MII_TXD[0:7], PA8 = MII_TXEN, PA9 = MII_TXCLK. |
| XTAL, XTAL1, XTAL2 | Clock input/output | Supports 1–25 MHz crystal oscillator or external clock source - feeds PLL for 50 MHz system clock generation. |
| nRST | Active-low reset | Asynchronous reset input with internal pull-up - initiates full device reset including flash controller and peripheral state machines. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Ethernet MAC | Full-duplex MII interface with 4-KB transmit/receive FIFO - offloads TCP/IP stack processing and enables < 100 µs interrupt latency for time-critical packet handling. |
| Hibernation Module | 2 KB battery-backed SRAM, calendar RTC, and wake-on-RTC match - sustains configuration and timekeeping during main power loss with sub-10 µA quiescent current. |
| Dual UARTs with FIFO | Two 16550-compatible UARTs, each with 16-byte RX/TX FIFO and programmable baud rates - supports simultaneous debug console and fieldbus communication without CPU polling. |
| Programmable Clock System | PLL-based clock generator with multiple dividers, system clock gating, and sleep-mode clock scaling - enables dynamic power/performance trade-offs across operating modes. |
| ADC with Hardware Averaging | 8-channel, 10-bit SAR ADC with 4x/8x/16x/32x oversampling and averaging - improves effective resolution to ~11.5 bits for noisy industrial sensor signals. |
Applications
| Industrial Ethernet Gateway | Smart Sensor Node |
|---|---|
Use Scenario: Protocol translation between Modbus RTU field devices and Ethernet/IP networks in factory automation. IC Role / Device Role / Timing Role: Central controller executing real-time Modbus parsing, Ethernet frame assembly, and deterministic response timing. Use Value: Integrated MAC eliminates external Ethernet controller, reducing BOM cost and PCB area while maintaining < 1 ms end-to-end latency. | Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and vibration data with scheduled Ethernet upload. IC Role / Device Role / Timing Role: Low-power host managing sensor interfaces, local data aggregation, and scheduled wake-up for network transmission. Use Value: Hibernation module enables multi-week battery life using coin-cell backup, with RTC-triggered wake-up and precise timestamping of measurements. |
| Programmable Logic Controller (PLC) I/O Module | Networked Motor Drive Controller |
Use Scenario: DIN-rail mounted I/O expansion unit with digital input/output, analog input, and Ethernet backhaul. IC Role / Device Role / Timing Role: Real-time I/O scheduler coordinating scan cycles, diagnostics, and EtherNet/IP explicit messaging. Use Value: Deterministic 50 MHz Cortex-M3 execution and dedicated GPIO interrupt vectors ensure sub-100 µs input sampling jitter and cycle-consistent output updates. | Use Scenario: Closed-loop motor control with position feedback, current sensing, and remote parameter tuning over Ethernet. IC Role / Device Role / Timing Role: Motion controller executing PID loops, PWM generation, and safety monitoring with synchronized ADC sampling. Use Value: Simultaneous ADC conversion and PWM update within same timer period ensures phase-aligned current regulation and torque ripple reduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S6965-IQC50-A2T | Same core, package, and speed; adds CAN controller and removes Ethernet MAC - no MII pins or MAC logic. | Suitable for CANopen-based motion systems but lacks native Ethernet connectivity required for IP-based SCADA. | Select when CAN bus integration outweighs Ethernet needs and PHY cost must be avoided. |
| TM4C123GH6PM | Successor family with enhanced peripherals: USB, higher ADC resolution (12-bit), larger flash (256 KB), same 100-pin LQFP - but requires firmware migration due to register map changes. | Supports USB device/host and more advanced analog acquisition, but not drop-in compatible with LM3S6918-IQC50-A2T code or pinout. | Choose for new designs needing future-proofing, USB, or improved analog performance - not for LM3S6918-IQC50-A2T replacement. |
Compared with LM3S6918-IQC50-A2T, LM3S6965-IQC50-A2T trades Ethernet for CAN in identical packaging, while TM4C123GH6PM offers architectural upgrades but demands hardware and software redesign - making LM3S6918-IQC50-A2T optimal for legacy Ethernet-enabled industrial controllers requiring long-term stability.
Availability
LM3S6918-IQC50-A2T is available at Aetrix Electronics and suitable for industrial Ethernet gateways, smart sensor nodes, PLC I/O modules, and networked motor drive controllers requiring stable component supply and long-lifecycle support.
Supply support for LM3S6918-IQC50-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 series was designed specifically for cost-sensitive, real-time industrial and building automation applications requiring integrated connectivity, low-power hibernation, and deterministic control - with LM3S6918-IQC50-A2T targeting Ethernet-enabled edge nodes.
FAQ
What is the maximum operating frequency of the LM3S6918-IQC50-A2T?
The LM3S6918-IQC50-A2T operates at a maximum system clock frequency of 50 MHz, achieved via its on-chip PLL that multiplies a 1–25 MHz crystal or external clock source. This frequency is specified across the full industrial temperature range (–40°C to +85°C) and is validated in TI's SPMS140I production datasheet. The LM3S6918-IQC50-A2T maintains timing compliance under worst-case voltage and temperature conditions without derating.
Does the LM3S6918-IQC50-A2T include an integrated Ethernet PHY?
No, the LM3S6918-IQC50-A2T includes only an Ethernet MAC with MII interface - it requires an external PHY (e.g., DP83848) for physical layer signaling. The LM3S6918-IQC50-A2T provides all MAC-layer registers, DMA channels, and interrupt logic but does not integrate magnetics, line drivers, or auto-negotiation circuitry. This separation allows flexible PHY selection based on speed, isolation, or ESD requirements.
What power-saving features does the LM3S6918-IQC50-A2T support?
The LM3S6918-IQC50-A2T supports Sleep, Deep-Sleep, and Hibernation modes, with the hibernation module enabling sub-10 µA quiescent current using battery-backed SRAM and RTC. In Hibernation mode, the LM3S6918-IQC50-A2T retains 2 KB of RAM, tracks real-time via calendar RTC, and wakes on RTC alarm or external pin assertion - all verified in Section 6 of the SPMS140I datasheet.
How many UART interfaces does the LM3S6918-IQC50-A2T provide?
The LM3S6918-IQC50-A2T integrates two independent UART peripherals (UART0 and UART1), each compliant with the 16550 specification and featuring 16-byte FIFOs, programmable baud-rate generators, and full modem control signal support. Both UARTs are accessible via GPIO multiplexing on Port A and Port B, and their interrupt vectors are individually configurable in the NVIC - confirmed in Sections 12 and 8 of the SPMS140I datasheet.
Is the LM3S6918-IQC50-A2T pin-compatible with other Stellaris LM3S devices?
No, the LM3S6918-IQC50-A2T is not pin-compatible with most other LM3S devices due to unique MII signal allocation (e.g., PA0–PA7 as MII_TXD[0:7]) and hibernation-specific pins (HIB_RTCC, HIB_WAKE). While sharing the 100-pin LQFP footprint with LM3S6965-IQC50-A2T, pin functions differ significantly - especially for Ethernet and CAN - requiring board-level redesign for substitution. This is documented in TI's LM3S6918 and LM3S6965 datasheet comparison tables.
LM3S6918-IQC50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 6000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 38
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S6918-IQC50-A2T FAQ
1.How can I place an order for LM3S6918-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S6918-IQC50-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 LM3S6918-IQC50-A2T reliable?
The price and inventory of LM3S6918-IQC50-A2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S6918-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S6918-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S6918-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S6918-IQC50-A2T?
LM3S6918-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S6918-IQC50-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 LM3S6918-IQC50-A2T?
For technical support, including LM3S6918-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S6918-IQC50-A2T requirements.
6.How does Aetrix verify that LM3S6918-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S6918-IQC50-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 LM3S6918-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S6918-IQC50-A2T?
All LM3S6918-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S6918-IQC50-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 LM3S6918-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S6918-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S6918-IQC50-A2T 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…
