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Texas Instruments LM3S3748-IQC50-A0T
- Part No.:
- LM3S3748-IQC50-A0T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S3748-IQC50-A0T.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
LM3S3748-IQC50-A0T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated hibernation module, 12-bit ADC (up to 1 MSPS), and dual UARTs + SSI + I²C interfaces. It operates at 50 MHz and supports industrial motor control, sensor node, and embedded HMI applications.
For engineers reviewing the LM3S3748-IQC50-A0T datasheet, LM3S3748-IQC50-A0T pinout, LM3S3748-IQC50-A0T application, or LM3S3748-IQC50-A0T equivalent, key selection criteria include hibernation-capable RTC, μDMA support for peripheral offload, and on-chip ROM-based StellarisWare driver library compatibility.
Technical Context
The LM3S3748-IQC50-A0T implements the ARMv7-M architecture with NVIC-integrated interrupt handling, bit-band memory access, and hardware divide/shift operations. Its system-level design includes a dedicated hibernation module with battery-backed RTC and 2 KB of hibernate memory, enabling sub-μA sleep current.
Peripherals are tightly coupled via AHB/APB bridges: the μDMA controller supports 32-channel arbitration across UART, SSI, I²C, ADC, and timer peripherals; the analog subsystem integrates a 12-bit, 8-channel ADC with sequencer-triggered sampling and internal temperature sensor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max operation - enables deterministic real-time execution with <12-cycle interrupt latency. |
| Flash Memory | 256 KB - sufficient for full StellarisWare stack plus application firmware with field-upgrade headroom. |
| SRAM | 64 KB - supports large buffers for communication stacks (e.g., Modbus RTU over UART) and real-time control variables. |
| ADC Resolution & Speed | 12-bit, up to 1 MSPS - suitable for precision analog sensing (e.g., current/voltage monitoring in motor drives). |
| Hibernate Current | 1.7 µA typical - enables multi-year battery life in remote sensor nodes using hibernation mode with RTC wake-up. |
| Communication Interfaces | 2× UART, 2× SSI, 1× I²C - provides native support for industrial serial protocols (RS-485, SPI sensors, EEPROM) without external glue logic. |
| Package | 100-pin LQFP (14 × 14 mm) - standard surface-mount footprint compatible with automated PCB assembly and thermal management. |
Pinout & Package
LM3S3748-IQC50-A0T is housed in a 100-pin LQFP package (JEDEC MS-026AC) with exposed thermal pad. Pin assignments follow TI's standardized Stellaris LM3S pinout layout for consistent board reuse across the LM3S3000 family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Differentiated domains: VDD (digital core), VDDA (analog), VDDC (hibernation RTC) - enable noise isolation and independent power gating. |
| GPIOA–GPIOE | General-purpose I/O banks | Five 8-bit ports with configurable slew rate, drive strength, and alternate function mapping - support multiplexed peripheral signals (e.g., UART0_TX on PA0, SSI0_CLK on PA2). |
| HIB, RTCCLK, HIBRST | Hibernation control signals | Dedicated hibernation module interface - allows external battery backup, RTC clock input, and controlled entry/exit from hibernate state. |
| USB0VBUS, USB0ID, USB0DM/DP | USB 2.0 Full-Speed interface | Integrated USB PHY with device-mode support - enables direct PC connectivity for firmware updates and diagnostics without external transceiver. |
| NMI, RESET | System reset and fault inputs | Non-maskable interrupt and active-low reset - provide robust recovery paths for safety-critical embedded functions. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module with RTC | Retains 2 KB SRAM and maintains accurate timekeeping at 1.7 µA - eliminates need for external RTC + backup battery in portable designs. |
| ROM-Based StellarisWare Library | Pre-compiled drivers for UART, ADC, GPIO, and timers stored in on-chip ROM - reduces flash usage and ensures version-stable peripheral initialization. |
| μDMA Controller (32 channels) | Offloads CPU during high-throughput transfers (e.g., ADC streaming to SRAM or UART TX buffering) - improves real-time responsiveness and lowers active power. |
| Integrated Analog Subsystem | 12-bit ADC with hardware averaging, temperature sensor, and differential input support - enables single-chip analog front-end for condition monitoring systems. |
| USB Device Stack Support | Native USB 2.0 Full-Speed device controller with descriptor handling - simplifies implementation of CDC, HID, or DFU classes for field serviceability. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop BLDC motor control with current sensing, PWM generation, and thermal monitoring. IC Role / Device Role / Timing Role: Real-time control unit executing FOC algorithms, managing gate drivers via PWM outputs, and sampling analog feedback via ADC. Use Value: Integrated 50 MHz Cortex-M3, μDMA-accelerated ADC reads, and hibernation-ready RTC allow responsive torque control while supporting low-power idle states between motion cycles. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and air quality with periodic wireless upload. IC Role / Device Role / Timing Role: System-on-chip host managing sensor interfaces (I²C, ADC), data logging, and scheduled wake-up via hibernation RTC. Use Value: 1.7 µA hibernate current and on-chip 2 KB hibernate RAM enable >5-year battery life with hourly wake-ups and sensor readings. |
| Embedded Human-Machine Interface | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: Touch-enabled local display panel with button inputs, LED indicators, and serial communication to main controller. IC Role / Device Role / Timing Role: Dedicated UI processor handling touch scanning, display refresh timing, and user input debouncing. Use Value: Dual UARTs support simultaneous debug console and Modbus RTU master/slave communication; GPIO flexibility enables direct LED/button interfacing without external shifters. | Use Scenario: DIN-rail mounted digital I/O expansion module with isolated inputs/outputs and RS-485 fieldbus interface. IC Role / Device Role / Timing Role: Fieldbus protocol handler and local I/O manager coordinating discrete input sampling and output state updates. Use Value: SSI and UART peripherals directly interface with isolated level translators and RS-485 transceivers; μDMA ensures deterministic response to fieldbus polling cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4F120H5QR | ARM Cortex-M4F core, 80 MHz, FPU, 256 KB flash, same 100-pin LQFP - adds floating-point math acceleration and higher clock speed. | Required for computationally intensive tasks (e.g., FFT-based vibration analysis) not feasible on Cortex-M3. | Select when application demands hardware floating-point or >50 MHz deterministic timing; requires firmware recompilation and validation. |
| TM4C123GH6PM | Successor generation: enhanced USB OTG, 1 MB flash, 256 KB SRAM, same peripheral set - fully pin-compatible with LM3S3748-IQC50-A0T in 100-pin LQFP. | Supports longer product lifecycle, larger code base, and USB host capability - ideal for new designs requiring future scalability. | Preferred for new designs where long-term availability and feature headroom are critical; drop-in replacement with minor register mapping updates. |
Compared with LM3S3748-IQC50-A0T, LM4F120H5QR delivers higher computational throughput for signal processing, while TM4C123GH6PM offers extended memory, USB OTG, and guaranteed longevity - both retain identical peripheral architecture and pinout for migration path continuity.
Availability
LM3S3748-IQC50-A0T is available at Aetrix Electronics and suitable for industrial motor control, smart sensor node, and embedded HMI applications requiring stable component supply, long-lifecycle support, and proven qualification in harsh environments.
Supply support for LM3S3748-IQC50-A0T 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of industrial-grade MCU development expertise.
The Stellaris LM3S series was designed for cost-sensitive, real-time embedded applications demanding low power, rich analog integration, and seamless software ecosystem support - targeting industrial automation, building controls, and portable instrumentation.
FAQ
What is the maximum operating frequency of the LM3S3748-IQC50-A0T?
The LM3S3748-IQC50-A0T operates at a maximum system clock frequency of 50 MHz, as specified in its production data sheet. This frequency is achieved using the internal PLL with an external crystal or oscillator input. The LM3S3748-IQC50-A0T maintains full peripheral functionality and timing compliance at this rated speed under industrial temperature conditions (–40°C to +85°C).
Does the LM3S3748-IQC50-A0T include an integrated USB interface?
Yes, the LM3S3748-IQC50-A0T integrates a USB 2.0 Full-Speed device controller with on-chip PHY. It supports standard USB classes including CDC (virtual COM port), HID, and DFU - enabling firmware updates, debugging, and host communication without external transceivers. The LM3S3748-IQC50-A0T USB module is fully functional in device mode only.
What is the hibernate current specification for the LM3S3748-IQC50-A0T?
The LM3S3748-IQC50-A0T achieves a typical hibernate current of 1.7 µA when the hibernation module is active and the RTC is running from an external 32.768 kHz crystal. This value is measured under specified test conditions (VDD = 3.3 V, TA = 25°C) and enables multi-year battery operation in always-on sensor applications. The LM3S3748-IQC50-A0T retains 2 KB of SRAM and RTC timekeeping in this state.
Is the LM3S3748-IQC50-A0T pin-compatible with other Stellaris devices?
The LM3S3748-IQC50-A0T uses a 100-pin LQFP package with a pinout aligned to the LM3S3000 family. It shares identical mechanical and electrical pin assignments with LM3S3634, LM3S3661, and LM3S3749 in the same package variant. However, peripheral enablement and alternate function mapping differ per part number - firmware and schematic review is required before substitution. The LM3S3748-IQC50-A0T is not pin-compatible with later TM4C series without layout modification.
What development tools support the LM3S3748-IQC50-A0T?
The LM3S3748-IQC50-A0T is supported by Texas Instruments' Code Composer Studio (CCS) IDE, Keil MDK-ARM, and IAR Embedded Workbench. TI's Stellaris Peripheral Driver Library (StellarisWare) - pre-compiled in ROM and available as source - provides tested drivers for all on-chip peripherals. Evaluation is enabled via the original Stellaris DK-LM3S9B96 development kit, which includes JTAG debugging and expansion headers compatible with the LM3S3748-IQC50-A0T.
LM3S3748-IQC50-A0T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 3000
- 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, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 61
- Program Memory Size:
- 128KB (128K 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:
LM3S3748-IQC50-A0T FAQ
1.How can I place an order for LM3S3748-IQC50-A0T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S3748-IQC50-A0T 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 LM3S3748-IQC50-A0T reliable?
The price and inventory of LM3S3748-IQC50-A0T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S3748-IQC50-A0T is usually 5 days.
3.What payment methods are accepted for LM3S3748-IQC50-A0T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S3748-IQC50-A0T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S3748-IQC50-A0T?
LM3S3748-IQC50-A0T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S3748-IQC50-A0T 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 LM3S3748-IQC50-A0T?
For technical support, including LM3S3748-IQC50-A0T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S3748-IQC50-A0T requirements.
6.How does Aetrix verify that LM3S3748-IQC50-A0T is sourced from the original manufacturer or authorized distributors?
All LM3S3748-IQC50-A0T 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 LM3S3748-IQC50-A0T meets industry standards.
7.What is the process for return or replacement of LM3S3748-IQC50-A0T?
All LM3S3748-IQC50-A0T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S3748-IQC50-A0T, 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 LM3S3748-IQC50-A0T part is unused and in its original packaging.
Return procedure for LM3S3748-IQC50-A0T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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