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Texas Instruments LM3S5632-IQR50-A0
- Part No.:
- LM3S5632-IQR50-A0
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
LM3S5632-IQR50-A0.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,595
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Product details
Overview
LM3S5632-IQR50-A0 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated ADC (12-bit, 1 MSPS), dual UARTs, SSI, I²C, PWM timers, and hibernation module. It operates at up to 50 MHz and targets motor control and industrial sensing applications requiring deterministic real-time response.
For engineers reviewing the LM3S5632-IQR50-A0 datasheet, LM3S5632-IQR50-A0 pinout, LM3S5632-IQR50-A0 application, or LM3S5632-IQR50-A0 equivalent, key selection criteria include its 50 MHz CPU clock, hibernation mode with RTC and battery-backed memory, integrated analog peripherals, and QFP-100 package compatibility for space-constrained embedded designs.
Technical Context
The LM3S5632-IQR50-A0 implements the ARM Cortex-M3 core with NVIC, SysTick, MPU, and debug support via JTAG/SWD. Its system architecture integrates μDMA for peripheral-to-memory transfers without CPU intervention, reducing interrupt latency in time-critical control loops.
It features a dedicated hibernation module with independent 32.768 kHz RTC, battery-backed SRAM (2 KB), and wake-up capability from deep-sleep states using external pins or RTC match events-enabling ultra-low-power operation in battery-powered monitoring systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, supports Thumb-2 instruction set for code density and performance efficiency |
| Max Clock Speed | 50 MHz - enables deterministic execution of real-time control algorithms within 20 ns instruction cycle |
| Flash Memory | 256 KB - sufficient for complex firmware including bootloader, communication stacks, and application logic |
| SRAM | 64 KB - supports large data buffers, stack/heap allocation, and real-time signal processing tasks |
| ADC | 12-bit, 1 MSPS, 8-channel - provides high-resolution sampling for motor current/voltage feedback and sensor conditioning |
| Hibernation Mode Current | 1.7 µA - enables multi-year battery life in remote sensor nodes with periodic wake-up intervals |
| Package | 100-pin LQFP (14 mm × 14 mm) - standard surface-mount footprint compatible with automated PCB assembly |
Pinout & Package
LM3S5632-IQR50-A0 is housed in a 100-pin Low-Profile Quad Flat Package (LQFP) with 0.5 mm pitch, thermal pad exposed on underside for enhanced heat dissipation in industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Digital (VDD), analog (VDDA), and core (VDDC) rails require separate decoupling for noise isolation and stable ADC reference |
| GND, GNDA, GNDC | Ground returns | Analog ground (GNDA) must be routed separately from digital ground to minimize ADC quantization error |
| PD0–PD7, PE0–PE5, PF0–PF4, etc. | GPIO banks | Configurable as digital I/O, alternate function (UART/SSI/I²C), or timer/PWM outputs with slew-rate control |
| U0RX/U0TX, U1RX/U1TX | UART serial interfaces | Dual asynchronous serial ports support simultaneous host diagnostics and fieldbus communication (e.g., Modbus RTU) |
| SSI0CLK/SSI0FSS/SSI0RX/SSI0TX | Synchronous serial interface | Full-duplex SPI-compatible port for connecting to sensors, DACs, or display controllers with programmable bit rate |
| PH0–PH3 | Hibernate module I/O | Dedicated pins for RTC crystal (32.768 kHz), battery backup input (VBAT), and hibernate wake-up signals |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module with RTC | Enables sub-2 µA sleep current with precise timekeeping and wake-up event triggering-critical for energy-harvesting and battery-operated edge devices |
| μDMA Controller | 8-channel controller offloads data movement from CPU, freeing cycles for control computation while maintaining UART/SSI/ADC throughput |
| Integrated Analog Peripherals | Single-chip solution includes 12-bit ADC, analog comparator, and internal temperature sensor-eliminates need for external signal-conditioning ICs |
| Motor Control Timers | Four 16/32-bit general-purpose timers with PWM, capture, and quadrature encoder interfaces-supports brushless DC and stepper motor commutation |
| JTAG + SWD Debug | Standard ARM debug interface with full visibility into registers, memory, and real-time trace-accelerates firmware validation and field failure analysis |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop speed and position control of BLDC motors in HVAC blowers and conveyor drives. IC Role / Device Role / Timing Role: Real-time execution of FOC (Field-Oriented Control) algorithms with synchronized PWM generation and current sampling. Use Value: Integrated ADC, PWM timers, and hibernation enable compact, low-BOM-cost motor drive with standby power under 2 µA. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and air quality over 5+ years. IC Role / Device Role / Timing Role: System-on-chip controller managing sensor polling, data logging, and wireless transmission during brief wake periods. Use Value: Hibernation mode with RTC and battery-backed memory preserves state and time between measurements, extending battery life significantly. |
| Programmable Logic Controller (PLC) I/O Module | Energy Metering Interface |
Use Scenario: DIN-rail mounted I/O expansion module with digital input filtering, relay driving, and Modbus RTU communication. IC Role / Device Role / Timing Role: Deterministic GPIO scanning, interrupt-driven edge detection, and dual UART handling of master/slave protocol stacks. Use Value: Dual UARTs and configurable GPIO with hardware debounce reduce external component count and improve EMI robustness in noisy factory environments. | Use Scenario: Residential smart meter collecting voltage/current samples via isolated ADC front-end and reporting via PLC or RF mesh. IC Role / Device Role / Timing Role: High-accuracy timing source for sample synchronization and secure firmware updates via encrypted UART bootloading. Use Value: 12-bit ADC with hardware averaging and 50 MHz CPU enable precise RMS calculation and fast FFT-based harmonic analysis. |
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 pinout but higher voltage tolerance (5 V-tolerant I/O) | Required when floating-point math (e.g., sensor fusion, PID tuning) or higher throughput is needed | Select LM4F120H5QR if migrating legacy LM3S code to FPU-accelerated control or needing 5 V-tolerant GPIOs |
| TM4C123GH6PM | Successor family with enhanced peripherals (USB, CAN), 32 KB SRAM, identical 100-pin LQFP package | Preferred for new designs requiring USB device/host or automotive-grade CAN FD support | Choose TM4C123GH6PM for long-term availability and extended feature set; LM3S5632-IQR50-A0 remains viable for cost-sensitive, non-USB/CAN applications |
Compared with LM4F120H5QR and TM4C123GH6PM, the LM3S5632-IQR50-A0 delivers proven reliability in industrial motor control and sensor nodes where deterministic 50 MHz Cortex-M3 performance, hibernation, and analog integration outweigh need for FPU or USB/CAN-making it ideal for mature, volume-optimized BOMs.
Availability
LM3S5632-IQR50-A0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and energy metering interfaces requiring stable component supply and long-lifecycle support.
Supply support for LM3S5632-IQR50-A0 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time embedded applications demanding integrated analog, motor control peripherals, and ultra-low-power hibernation-targeting industrial automation and intelligent sensing.
FAQ
What is the maximum operating frequency of the LM3S5632-IQR50-A0?
The LM3S5632-IQR50-A0 operates at a maximum CPU clock frequency of 50 MHz. This speed is achieved using an internal PLL driven by the main oscillator or external crystal, and is fully supported across the entire industrial temperature range (–40°C to +105°C). The LM3S5632-IQR50-A0 maintains timing compliance and flash access integrity at this rate without wait states.
Does the LM3S5632-IQR50-A0 support hibernation mode with battery backup?
Yes, the LM3S5632-IQR50-A0 includes a dedicated hibernation module that supports battery-backed operation. It retains 2 KB of SRAM and maintains RTC functionality using an external 32.768 kHz crystal and VBAT supply. Typical hibernation current is 1.7 µA, enabling multi-year operation on coin-cell batteries. The LM3S5632-IQR50-A0 wakes via RTC alarm, external GPIO, or reset assertion.
How many UART interfaces does the LM3S5632-IQR50-A0 provide?
The LM3S5632-IQR50-A0 integrates two independent UART peripherals (UART0 and UART1), each supporting full-duplex asynchronous communication, programmable baud rates, FIFO buffering (16-byte depth), and hardware flow control. Both UARTs can operate simultaneously-for example, one for host diagnostics and another for fieldbus protocols like Modbus RTU-without CPU overhead due to μDMA support.
What ADC resolution and sampling rate does the LM3S5632-IQR50-A0 offer?
The LM3S5632-IQR50-A0 features a single 12-bit successive-approximation ADC with up to 1 MSPS conversion rate and eight input channels. It supports hardware averaging (2–64 samples), programmable sample sequencing, and differential input modes. The ADC's design allows direct connection to current-sense amplifiers or resistive sensors, and its performance is specified across the full industrial temperature range for the LM3S5632-IQR50-A0.
Is the LM3S5632-IQR50-A0 pin-compatible with other Stellaris devices?
The LM3S5632-IQR50-A0 uses a 100-pin LQFP package shared across multiple LM3S5xxx variants, but pin compatibility is not guaranteed across all functions. While core peripherals (GPIO, UART, SSI) map consistently, certain alternate functions (e.g., USB, CAN, or specific timer outputs) differ between models. Always verify signal mapping against the LM3S5632-IQR50-A0-specific datasheet before board reuse.
LM3S5632-IQR50-A0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 5000
- Packaging:
- Bulk
- Product Status:
- Not For New Designs
- 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, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 33
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 6x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S5632-IQR50-A0 FAQ
1.How can I place an order for LM3S5632-IQR50-A0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S5632-IQR50-A0 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 LM3S5632-IQR50-A0 reliable?
The price and inventory of LM3S5632-IQR50-A0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S5632-IQR50-A0 is usually 5 days.
3.What payment methods are accepted for LM3S5632-IQR50-A0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S5632-IQR50-A0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S5632-IQR50-A0?
LM3S5632-IQR50-A0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S5632-IQR50-A0 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 LM3S5632-IQR50-A0?
For technical support, including LM3S5632-IQR50-A0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S5632-IQR50-A0 requirements.
6.How does Aetrix verify that LM3S5632-IQR50-A0 is sourced from the original manufacturer or authorized distributors?
All LM3S5632-IQR50-A0 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 LM3S5632-IQR50-A0 meets industry standards.
7.What is the process for return or replacement of LM3S5632-IQR50-A0?
All LM3S5632-IQR50-A0 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S5632-IQR50-A0, 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 LM3S5632-IQR50-A0 part is unused and in its original packaging.
Return procedure for LM3S5632-IQR50-A0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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