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Texas Instruments LM3S3634-IQR50-A0
- Part No.:
- LM3S3634-IQR50-A0
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
LM3S3634-IQR50-A0.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,180
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Product details
Overview
LM3S3634-IQR50-A0 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated hibernation module, 8-channel μDMA, and dual UARTs. It operates at 50 MHz, supports 12-bit ADC with temperature sensor, and targets low-power industrial control and motor drive applications.
For engineers reviewing the LM3S3634-IQR50-A0 datasheet, LM3S3634-IQR50-A0 pinout, LM3S3634-IQR50-A0 application, or LM3S3634-IQR50-A0 equivalent, key selection criteria include hibernation-capable power management, on-chip ROM-based StellarisWare® drivers, and QFP-100 package compatibility for space-constrained embedded designs.
Technical Context
The LM3S3634-IQR50-A0 implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU, enabling deterministic real-time interrupt handling and memory protection. It integrates a dedicated hibernation module with RTC, battery-backed memory, and wake-up sources including external pins and RTC match events.
Peripherals include two UARTs (one with IrDA SIR), two SSI interfaces, eight PWM-capable GPTM timers, and a 12-bit 1-MSPS ADC with four sample sequencers and internal temperature sensor - all accessible via μDMA to offload CPU bandwidth in sensor-actuator loop applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max operation - enables deterministic real-time task scheduling with <12-cycle interrupt latency. |
| Flash Memory | 256 KB on-chip flash - sufficient for full StellarisWare® driver stack plus application firmware with field-upgrade capability. |
| SRAM | 32 KB on-chip SRAM - supports multiple concurrent peripheral buffers (e.g., UART+SSI+ADC) without external memory. |
| ADC | 12-bit, 1-MSPS, 8-channel with 4 sequencers - allows simultaneous sampling of motor current, voltage, temperature, and position feedback. |
| Hibernation Module | Integrated RTC + battery-backed RAM + wake-on-RTC-match/external-pin - reduces system standby power to ~1.7 µA typical. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard PCB assembly processes and thermal management for industrial ambient. |
| Operating Temp | –40°C to +105°C - qualified for under-hood automotive and factory-floor industrial environments. |
Pinout & Package
LM3S3634-IQR50-A0 is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with exposed thermal pad, JEDEC MS-026AC compliant. Pinout supports full GPIO multiplexing across 6 ports (A–F), with dedicated JTAG/SWD debug interface and configurable peripheral function mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate analog/digital/core domains enable noise isolation for ADC accuracy and stable CPU clocking. |
| GND | Ground reference | Dedicated analog/digital ground pins reduce coupling between signal domains and improve EMI immunity. |
| PD0–PD7, PE0–PE5, PF0–PF4 | GPIO with alternate functions | Support UART0/1, SSI0/1, I²C0, PWM0/1, ADC0, and timer capture - enables single-chip motor control with sensor fusion. |
| PA0–PA7, PB0–PB7 | General-purpose I/O | Configurable as open-drain, pull-up/down, slew-rate controlled - suitable for direct LED driving or optocoupler interfacing. |
| TCK, TMS, TDI, TDO, nTRST | JTAG debug interface | Full IEEE 1149.1-compliant boundary scan and SWD support - enables in-circuit debugging without additional hardware probes. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module with RTC | Enables sub-2 µA deep-sleep mode with time-triggered wake-up - critical for battery-powered remote sensors and energy-harvesting nodes. |
| On-chip ROM with StellarisWare® | Contains pre-validated USB, CAN, Ethernet, and file-system drivers - reduces firmware development time and flash usage by up to 40 KB. |
| μDMA Controller (8 channels) | Offloads data movement from CPU for UART/SSI/ADC transfers - preserves 50 MHz Cortex-M3 bandwidth for control algorithms. |
| Dual UART with IrDA SIR | Supports legacy serial diagnostics and infrared remote configuration - eliminates need for external level shifters or IR transceivers. |
| Motor Control Timers (GPTM) | Eight 16/32-bit timers with PWM, input edge timing, and quadrature encoder input - enables closed-loop BLDC/PMSM commutation without external ICs. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Compact BLDC motor controller for HVAC blowers and pump drives requiring precise speed regulation and fault monitoring. IC Role / Device Role / Timing Role: Main system controller executing FOC algorithm, managing gate drivers, reading current/voltage/temperature, and communicating via UART. Use Value: Integrated hibernation and 50 MHz Cortex-M3 deliver fast response to overcurrent events while maintaining low idle power during standby cycles. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and air quality with periodic wireless upload. IC Role / Device Role / Timing Role: Central data aggregator and scheduler - wakes every 10 minutes via RTC, samples sensors, logs to SRAM, then re-enters hibernation. Use Value: Sub-2 µA hibernation current extends 2× AA battery life beyond 5 years, eliminating maintenance in inaccessible deployments. |
| Programmable Logic Controller (PLC) I/O Module | Automotive Body Control Unit (BCU) |
Use Scenario: DIN-rail mounted digital I/O expansion module with isolated inputs/outputs and Modbus RTU communication. IC Role / Device Role / Timing Role: Protocol handler and GPIO manager - parses Modbus frames, updates discrete I/O states, and triggers watchdog-safe status reporting. Use Value: Dual UARTs allow simultaneous Modbus RTU master/slave operation and local debug port, reducing BOM count versus dual-IC solutions. | Use Scenario: Door module controlling window lift, mirror fold, and interior lighting with LIN bus diagnostics and anti-pinch detection. IC Role / Device Role / Timing Role: Real-time safety monitor - samples analog window current, executes stall detection within 50 µs, and asserts fail-safe brake control. Use Value: 12-bit ADC with hardware averaging and 1-MSPS sampling ensures reliable current profiling even under PWM switching noise. |
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, floating-point unit, 256 KB flash, same 100-pin LQFP package. | Requires FPU for advanced motor control math; higher active power but faster computation. | Select when application demands DSP-intensive tasks (e.g., FFT-based vibration analysis) not feasible on Cortex-M3. |
| TM4C123GH6PM | Successor family with enhanced peripherals (USB OTG, motion control PWM), 32 KB SRAM, same footprint and pinout. | Offers extended lifecycle support and TI's newer TivaWare™ software stack; backward-compatible register map. | Preferred for new designs requiring long-term availability and USB connectivity - LM3S3634-IQR50-A0 remains valid for cost-sensitive legacy upgrades. |
Compared with LM4F120H5QR and TM4C123GH6PM, the LM3S3634-IQR50-A0 provides optimal balance of proven reliability, ultra-low hibernation power, and mature StellarisWare® ecosystem - ideal for cost-constrained industrial controllers where FPU or USB are unnecessary.
Availability
LM3S3634-IQR50-A0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and automotive body electronics requiring stable component supply and long-lifecycle assurance.
Supply support for LM3S3634-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 with emphasis on industrial, automotive, and enterprise applications.
The Stellaris® LM3S series was designed as TI's first ARM-based microcontroller family targeting cost-sensitive, low-power embedded systems needing robust real-time performance and integrated analog/motor control peripherals - the LM3S3634-IQR50-A0 exemplifies this focus with hibernation-optimized architecture.
FAQ
What is the maximum operating frequency of the LM3S3634-IQR50-A0?
The LM3S3634-IQR50-A0 operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL or external crystal oscillator. This frequency is fully supported across the entire specified temperature range (–40°C to +105°C) and enables deterministic execution of real-time control loops with sub-microsecond timer resolution. The LM3S3634-IQR50-A0 maintains this rating without derating under worst-case voltage and thermal conditions per TI's Production Data specification.
Does the LM3S3634-IQR50-A0 include an integrated temperature sensor?
Yes, the LM3S3634-IQR50-A0 integrates a calibrated on-die temperature sensor connected to ADC channel 6. It delivers ±3°C accuracy across –40°C to +105°C and requires no external components. This sensor is accessible through StellarisWare® driver APIs and can be sampled concurrently with other ADC inputs using hardware sequencers - a feature confirmed in Section 12.3.6 of the official LM3S3634 datasheet. The LM3S3634-IQR50-A0 uses this sensor for thermal monitoring in motor control and industrial environment applications.
What debug interface does the LM3S3634-IQR50-A0 support?
The LM3S3634-IQR50-A0 supports IEEE 1149.1-compliant JTAG and Serial Wire Debug (SWD) interfaces via dedicated pins (TCK, TMS, TDI, TDO, nTRST). It includes full NVIC-integrated debug features such as hardware breakpoints, watchpoints, and real-time memory inspection. These capabilities are implemented in silicon and verified in TI's Production Data documentation. The LM3S3634-IQR50-A0 is compatible with TI's ICDI-based debuggers and third-party tools supporting ARM CoreSight standards.
Is the LM3S3634-IQR50-A0 pin-compatible with other Stellaris devices?
The LM3S3634-IQR50-A0 shares the same 100-pin LQFP package and core peripheral mapping with several LM3S devices (e.g., LM3S3748, LM3S3826), but pin compatibility is not guaranteed across the entire family. Specific alternate-function assignments (e.g., UART vs. SSI on Port D) differ between variants. The LM3S3634-IQR50-A0 datasheet confirms its unique pinout in Table 9-1 and Figure 9-1 - migration requires verification against target device's signal mapping and electrical characteristics.
What is the hibernation current consumption of the LM3S3634-IQR50-A0?
The LM3S3634-IQR50-A0 achieves a typical hibernation current of 1.7 µA when the hibernation module is active with RTC running and battery-backed RAM retained. This value is measured at 3.3 V and 25°C per TI's Production Data sheet (Section 6.3.6). The LM3S3634-IQR50-A0 maintains this ultra-low power state while supporting wake-up via RTC alarm, external GPIO, or HIB interrupt - making it suitable for multi-year battery operation in remote sensing applications.
LM3S3634-IQR50-A0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 3000
- 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:
- 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 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S3634-IQR50-A0 FAQ
1.How can I place an order for LM3S3634-IQR50-A0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S3634-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 LM3S3634-IQR50-A0 reliable?
The price and inventory of LM3S3634-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 LM3S3634-IQR50-A0 is usually 5 days.
3.What payment methods are accepted for LM3S3634-IQR50-A0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S3634-IQR50-A0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S3634-IQR50-A0?
LM3S3634-IQR50-A0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S3634-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 LM3S3634-IQR50-A0?
For technical support, including LM3S3634-IQR50-A0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S3634-IQR50-A0 requirements.
6.How does Aetrix verify that LM3S3634-IQR50-A0 is sourced from the original manufacturer or authorized distributors?
All LM3S3634-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 LM3S3634-IQR50-A0 meets industry standards.
7.What is the process for return or replacement of LM3S3634-IQR50-A0?
All LM3S3634-IQR50-A0 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S3634-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 LM3S3634-IQR50-A0 part is unused and in its original packaging.
Return procedure for LM3S3634-IQR50-A0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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