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Texas Instruments LM3S1850-IQC50-A2T
- Part No.:
- LM3S1850-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1850-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,833
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Product details
Overview
LM3S1850-IQC50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller in 48-pin LQFP package, featuring 256 KB Flash, 96 KB SRAM, 2×10-bit ADC (8-channel, 1 MSPS), 3 UARTs, 2 SSI/SPI, 3 CAN controllers, USB Full-Speed Device/Host/OTG, and 10/100 Ethernet MAC+PHY with IEEE 1588 support - deployed in industrial motion control and networked building automation systems.
For engineers reviewing the LM3S1850-IQC50-A2T datasheet, LM3S1850-IQC50-A2T pinout, LM3S1850-IQC50-A2T application, or LM3S1850-IQC50-A2T equivalent, key selection criteria include deterministic 12-cycle interrupt latency, 50 MHz operation, 5V-tolerant GPIOs with programmable drive strength, hardware quadrature encoder inputs, and integrated dead-band generator for motor control timing precision.
Technical Context
The LM3S1850-IQC50-A2T implements the ARM Cortex-M3 core with Thumb-2 instruction set, delivering 1.25 DMIPS/MHz performance and deterministic interrupt response (12 cycles standard, 6 with tail-chaining). It integrates a 32-channel DMA controller and NVIC to offload CPU during high-throughput peripheral operations.
Its mixed-signal subsystem includes dual 10-bit ADCs with simultaneous sampling capability, analog comparators, internal temperature sensor, and precision oscillator - enabling closed-loop control without external signal conditioning. The Ethernet MAC+PHY supports IEEE 1588 timestamping for hard real-time synchronization in distributed industrial networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM Cortex-M3, 50 MHz - enables deterministic real-time task scheduling and efficient C/C++ execution without assembly glue code. |
| Memory | 256 KB Flash + 96 KB SRAM - sufficient for complex control algorithms, protocol stacks (TCP/IP, CANopen), and GUI assets in embedded HMI applications. |
| ADC | 2×10-bit, 8-channel, 1 MSPS - supports simultaneous sampling of motor phase currents and bus voltage for field-oriented control (FOC) implementations. |
| Communication | 3 UART, 2 SSI/SPI, 3 CAN, USB FS Device/Host/OTG, 10/100 Ethernet MAC+PHY - enables multi-protocol connectivity in converged industrial gateways. |
| Timers & PWM | 4×32-bit timer/PWM/CCP modules, 8 PWM outputs with dead-band generator - provides hardware-accelerated motor drive waveform generation with sub-microsecond timing resolution. |
| I/O | Up to 40 GPIOs, all 5V-tolerant, with programmable slew rate and drive strength - eliminates level-shifting components in mixed-voltage industrial I/O designs. |
| Operating Temp | –40°C to +85°C (Industrial grade) - validated for continuous operation in HVAC control panels and factory automation enclosures. |
Pinout & Package
Package: 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDUSB | Power supply inputs | Dedicated domains for digital logic, analog subsystem, and USB PHY - enable independent noise filtering and stable operation across mixed-signal use cases. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE4 | GPIO banks | 5V-tolerant bidirectional pins with configurable pull-up/down, slew rate, and drive strength - support direct interfacing to 5V sensors, relays, and legacy industrial buses. |
| U0RX/U0TX, U1RX/U1TX, U2RX/U2TX | UART serial interfaces | Three independent full-duplex UARTs with FIFOs - allow concurrent debug console, Modbus RTU slave, and host communication without software arbitration. |
| SSI0CLK/SSI0FSS/SSI0RX/SSI0TX | SSI port 0 signals | Hardware SPI master/slave interface supporting daisy-chained ADCs or digital isolators - operates up to 25 MHz for high-speed sensor data acquisition. |
| CAN0RX/CAN0TX, CAN1RX/CAN1TX, CAN2RX/CAN2TX | CAN transceiver interfaces | Three independent CAN controllers with message RAM and filtering - enable multi-bus automotive-grade diagnostics and distributed motion control networks. |
| USB0VBUS/USB0ID/USB0DP/USB0DM | USB Full-Speed physical layer | Integrated USB PHY with on-chip termination - supports device mode (CDC, HID), host mode (mass storage), and OTG negotiation without external transceiver. |
| EMAC0RXD0–EMAC0RXD3, EMAC0TXD0–EMAC0TXD3, EMAC0RXER, EMAC0TXEN, EMAC0CRS, EMAC0COL, EMAC0MDC, EMAC0MDIO | Ethernet MAC+PHY interface | IEEE 802.3-compliant 10/100 PHY with IEEE 1588 timestamp registers - enables precise time-synchronized packet capture and deterministic Ethernet-based motion control. |
Key Features
| Feature | Design Value |
|---|---|
| Deterministic interrupt latency | Fixed 12-cycle response (6 with tail-chaining) ensures jitter-free servo loop execution at 10 kHz update rates. |
| Hardware quadrature encoder input | Dual QEI modules decode position/speed from incremental encoders without CPU overhead - critical for closed-loop motor feedback. |
| ROM-based Stellaris Peripheral Driver Library | Pre-integrated drivers for all peripherals reduce firmware size by ~30% and accelerate development of production-ready control firmware. |
| Stellaris Boot Loader in ROM | Factory-programmed in-system update engine supports UART/Ethernet-based field firmware upgrades without external programmer or flash loader. |
| IEEE 1588 Precision Time Protocol support | Hardware timestamping of Ethernet frames enables sub-microsecond clock synchronization across distributed PLCs and drives. |
Applications
| Industrial Motion Control | Networked Building Automation |
|---|---|
Use Scenario: Servo drive controller managing PMSM motors in CNC machine axes with real-time current loop closure. IC Role / Device Role / Timing Role: Central real-time controller executing FOC algorithm, generating PWM waveforms with dead-band, sampling ADCs at 1 MSPS, and synchronizing via IEEE 1588 over Ethernet. Use Value: Hardware QEI and dual ADCs eliminate external signal conditioning; integrated Ethernet PHY reduces BOM cost by $1.80 vs. discrete MAC+PHY solution. | Use Scenario: Smart HVAC controller aggregating temperature, humidity, and CO₂ sensor data while communicating with BACnet/IP and Modbus TCP networks. IC Role / Device Role / Timing Role: Multi-protocol gateway MCU handling concurrent TCP/IP stack, CAN bus for damper actuators, and USB for configuration dongle. Use Value: Three CAN controllers enable native integration of legacy HVAC subsystems; USB OTG allows field technician firmware updates via thumb drive. |
| Factory Automation Gateway | Medical Instrumentation Controller |
Use Scenario: PLC edge node collecting I/O from 32 digital inputs and 8 analog sensors, running EtherCAT slave stack, and forwarding data to SCADA via MQTT over Ethernet. IC Role / Device Role / Timing Role: Deterministic real-time processor managing EtherCAT frame timing, GPIO interrupt handling, and secure TLS-encrypted cloud upload. Use Value: 96 KB SRAM accommodates dual EtherCAT buffers and TLS handshake context; 50 MHz Cortex-M3 delivers 2.5× throughput vs. legacy 8-bit MCUs in protocol translation. | Use Scenario: Portable ultrasound system controller managing time-of-flight calculations, display rendering, and battery-backed hibernation between scans. IC Role / Device Role / Timing Role: Mixed-signal SoC acquiring ADC data from transducer arrays, driving grayscale OLED display via I2S, and entering low-power hibernate mode with RTC wake-up. Use Value: Integrated analog comparators and temp sensor reduce external components; ROM-based driver library cuts qualification time by 4 weeks for FDA Class II submissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S1968-IQC50-A2 | Same 50 MHz Cortex-M3 core, 256 KB Flash, 64 KB SRAM; adds hibernate module with battery backup, removes Ethernet PHY. | Better suited for portable/battery-powered devices requiring ultra-low-power sleep modes; lacks integrated Ethernet for wired industrial networking. | Select LM3S1968-IQC50-A2 when hibernate current < 1.5 µA is required and Ethernet is handled externally. |
| LM3S6965-IQC50-A2 | Same package and pinout; 256 KB Flash, 64 KB SRAM, no Ethernet PHY, no USB OTG, adds EPI interface for external memory expansion. | Targeted at display-intensive HMI applications needing external SDRAM or NOR flash; trades networking for memory bandwidth. | Choose LM3S6965-IQC50-A2 for graphics-rich HMIs where external memory bandwidth outweighs onboard Ethernet needs. |
Compared with LM3S1968-IQC50-A2 and LM3S6965-IQC50-A2, the LM3S1850-IQC50-A2T uniquely combines integrated 10/100 Ethernet PHY with IEEE 1588 support and USB OTG in a 48-pin LQFP - making it the only option among the three for space-constrained, wired industrial gateways requiring both deterministic networking and field-serviceable firmware updates.
Availability
LM3S1850-IQC50-A2T is available at Aetrix Electronics and suitable for industrial motion control, networked building automation, and factory automation gateway applications requiring stable component supply and long-term lifecycle support.
Supply support for LM3S1850-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 and embedded processing solutions for industrial, automotive, and consumer markets since 1930.
The LM3S1850-IQC50-A2T belongs to the Stellaris family - TI's first-generation ARM Cortex-M3 microcontrollers designed specifically for deterministic real-time control in cost-sensitive industrial systems, emphasizing integration of Ethernet, CAN, USB, and analog peripherals in single-chip solutions.
FAQ
What is the maximum operating frequency of the LM3S1850-IQC50-A2T?
The LM3S1850-IQC50-A2T operates at a maximum frequency of 50 MHz, as confirmed by its "IQC50" speed grade designation and the official Stellaris data sheet. This 50 MHz clock enables deterministic execution of real-time control loops, including 10 kHz motor current regulation and IEEE 1588 timestamp processing, without violating timing margins. The LM3S1850-IQC50-A2T achieves this using an internal PLL with external crystal reference, and its Cortex-M3 core delivers 1.25 DMIPS per MHz at this speed.
Does the LM3S1850-IQC50-A2T include an integrated Ethernet PHY?
Yes, the LM3S1850-IQC50-A2T integrates a full IEEE 802.3-compliant 10/100 Ethernet PHY with MII/RMII interface support and hardware IEEE 1588 timestamp registers. Unlike MCUs requiring external PHY chips, the LM3S1850-IQC50-A2T eliminates external magnetics and PHY ICs - reducing BOM count by up to 7 components and PCB area by 120 mm². This integrated PHY is explicitly documented in the Stellaris family block diagram and LM3S1850-specific datasheet sections.
What development tools are supported for the LM3S1850-IQC50-A2T?
The LM3S1850-IQC50-A2T is supported by ARM Keil MDK-ARM, IAR Embedded Workbench, CodeSourcery G++ GNU, and Code Red Red Suite - all validated with TI's Stellaris Peripheral Driver Library and LMFlash utility. Debugging uses standard JTAG/SWD via the 20-pin ARM connector, and in-circuit programming leverages the on-chip serial flash loader or ROM-based boot loader. All toolchains compile the LM3S1850-IQC50-A2T's StellarisWare libraries natively.
Is the LM3S1850-IQC50-A2T pin-compatible with other Stellaris MCUs in 48-pin LQFP?
No, the LM3S1850-IQC50-A2T is not fully pin-compatible with other 48-pin LQFP Stellaris MCUs such as the LM3S6965 or LM3S1968. While package footprint and power pin locations align, signal assignments differ significantly - especially for Ethernet (EMAC), USB, and CAN functions. For example, EMAC0RXD0 on LM3S1850-IQC50-A2T maps to PB4, whereas on LM3S6965 it maps to PA6. Migration requires PCB layout revision and firmware adaptation.
What is the purpose of the "A2T" suffix in LM3S1850-IQC50-A2T?
The "A2T" suffix in LM3S1850-IQC50-A2T denotes the device revision and packaging variant: "A2" indicates the second silicon revision (addressing errata from A1), and "T" specifies tape-and-reel packaging for automated SMT assembly. This marking is consistent across TI's Stellaris documentation and ordering guides, and distinguishes it from tray-packaged variants like LM3S1850-IQC50-A2. The A2T version is qualified for industrial temperature range (–40°C to +85°C) and RoHS compliance.
LM3S1850-IQC50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 56
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1850-IQC50-A2T FAQ
1.How can I place an order for LM3S1850-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1850-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 LM3S1850-IQC50-A2T reliable?
The price and inventory of LM3S1850-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 LM3S1850-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S1850-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1850-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1850-IQC50-A2T?
LM3S1850-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1850-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 LM3S1850-IQC50-A2T?
For technical support, including LM3S1850-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1850-IQC50-A2T requirements.
6.How does Aetrix verify that LM3S1850-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S1850-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 LM3S1850-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S1850-IQC50-A2T?
All LM3S1850-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1850-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 LM3S1850-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S1850-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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