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Texas Instruments LM3S1637-EQC50-A2T
- Part No.:
- LM3S1637-EQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1637-EQC50-A2T.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,975
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Product details
Overview
LM3S1637-EQC50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated hibernation module, 8-channel 12-bit ADC, dual UARTs, I²C, SSI, and PWM peripherals. It operates at 50 MHz and supports industrial motor control and sensor interface applications requiring low-power operation and real-time responsiveness.
For engineers reviewing the LM3S1637-EQC50-A2T datasheet, LM3S1637-EQC50-A2T pinout, LM3S1637-EQC50-A2T application, or LM3S1637-EQC50-A2T equivalent, key selection criteria include hibernation-capable power management, integrated analog front-end for sensor signal conditioning, and deterministic interrupt latency in real-time embedded control systems.
Technical Context
The LM3S1637-EQC50-A2T implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC supporting up to 48 configurable interrupts, and memory protection unit (MPU) for secure task isolation. It integrates a dedicated hibernation module with battery-backed RTC and 2 KB hibernate memory.
Peripherals include two UARTs with IrDA/SIR support, one I²C master/slave interface, two SSI controllers, eight 16-bit general-purpose timers (with RTC and PWM modes), and an analog comparator with internal reference. All digital I/Os are 5-V tolerant with programmable slew rate and drive strength.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, runs Thumb-2 instructions at up to 50 MHz |
| Flash Memory | 256 KB on-chip flash with 128-bit wide interface and single-cycle access at 50 MHz |
| SRAM | 32 KB on-chip SRAM, zero-wait-state operation at full speed |
| ADC | 12-bit SAR ADC with 8-channel input multiplexer, 1 MSPS sample rate, hardware averaging |
| Hibernation Module | Dedicated low-power domain with battery-backed RTC, 2 KB hibernate RAM, and wake-on-external-pin capability |
| I/O Voltage Tolerance | All GPIO pins support 5-V tolerant inputs and 3.3-V outputs with configurable pull-up/down |
| Operating Temp | –40°C to +105°C industrial temperature grade, qualified per AEC-Q100 Class 2 |
Pinout & Package
LM3S1637-EQC50-A2T is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow TI's standard Stellaris LM3S16xx pinout layout for mechanical and thermal compatibility across the family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate analog (VDDA), core (VDDC), and I/O (VDD) rails enable noise isolation and independent power sequencing |
| GND, GNDA, GNDC | Ground returns | Dedicated analog ground (GNDA) and core ground (GNDC) reduce coupling between sensitive analog and digital domains |
| PD0–PD7, PE0–PE5, PF0–PF4, etc. | General-purpose I/O | Multi-function pins supporting UART, SSI, I²C, timer capture/compare, and ADC input with 5-V tolerance |
| HIB, RTCCLK, HIBRST | Hibernation control | Direct interface to hibernation module: RTC clock input, hibernate request, and hibernate reset assertion |
| JTAG/SWD | Debug interface | SWDIO/SWCLK pins support serial wire debug; JTAG pins (TCK/TMS/TDI/TDO) available but not required for programming |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Mode Power Consumption | 1.9 µA typical with RTC running and 2 KB RAM retained - enables multi-year battery life in remote sensors |
| Integrated Analog Front-End | 8-channel 12-bit ADC + internal temperature sensor + analog comparator with programmable reference - eliminates external signal conditioning ICs |
| Deterministic Real-Time Response | NVIC with sub-12-cycle interrupt latency and tail-chaining ensures jitter-free motor commutation timing |
| Industrial I/O Robustness | 5-V tolerant inputs, ±4 kV ESD protection (HBM), and programmable slew rate control for EMC compliance in noisy environments |
| Secure Firmware Execution | Memory Protection Unit (MPU) enforces privilege-level separation between bootloader, RTOS kernel, and application tasks |
Applications
| Motor Control System | Industrial Sensor Node |
|---|---|
Use Scenario: Closed-loop BLDC motor control in HVAC blowers with field-oriented control (FOC) algorithm execution. IC Role / Device Role / Timing Role: Main controller executing FOC math, generating PWM gate signals, sampling current/voltage feedback via ADC, and managing thermal shutdown. Use Value: On-chip hibernation allows fan to enter ultra-low-power standby between cycles; 50 MHz CPU delivers sufficient MIPS for real-time FOC loop at 20 kHz switching frequency. | Use Scenario: Battery-powered environmental monitoring node measuring temperature, humidity, and CO₂ using analog and digital sensors. IC Role / Device Role / Timing Role: Central data acquisition engine with ADC sampling, I²C sensor communication, and RTC-triggered wake-up for periodic reporting. Use Value: Hibernation module reduces average system current to <2 µA during sleep, extending 2xAA battery life beyond 5 years. |
| Programmable Logic Controller (PLC) I/O Module | Smart Actuator Interface |
Use Scenario: DIN-rail mounted I/O expansion module for compact PLCs handling discrete inputs, analog inputs, and relay outputs. IC Role / Device Role / Timing Role: Real-time I/O processor interfacing with optocoupled inputs, 4–20 mA transmitters, and isolated relay drivers via GPIO and PWM. Use Value: 5-V tolerant GPIOs directly interface with legacy industrial sensors without level-shifting; MPU isolates firmware updates from control logic. | Use Scenario: Embedded controller inside electric linear actuators for position feedback, overload detection, and CAN bus command interpretation. IC Role / Device Role / Timing Role: Local motion controller performing closed-loop PID position control, reading potentiometer/encoder, and driving H-bridge MOSFETs. Use Value: Dual UARTs support simultaneous host command parsing (via RS-485) and diagnostic logging; integrated comparator enables fast overcurrent trip response (<1 µs). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Tiva C TM4C123GH6PM | Successor part with same pinout, 80 MHz Cortex-M4F core, FPU, enhanced peripheral set, and updated ROM-based bootloader | Supports floating-point math-intensive algorithms (e.g., advanced motor control, FFT-based vibration analysis) | Select when migrating from legacy Stellaris designs requiring higher performance or FPU acceleration |
| STM32F405RGT6 | ARM Cortex-M4F at 168 MHz, 1 MB flash, 192 KB RAM, no native hibernation module - requires external RTC/battery backup | Better suited for high-throughput data processing (e.g., protocol bridging, local edge analytics) than ultra-low-power hibernation | Select when application prioritizes raw compute throughput and memory capacity over sub-µA hibernate current |
Compared with TM4C123GH6PM and STM32F405RGT6, the LM3S1637-EQC50-A2T provides uniquely optimized hibernation power efficiency and integrated analog sensing-critical for battery-constrained industrial nodes-while trading off peak CPU performance and memory scale.
Availability
LM3S1637-EQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, battery-powered sensor networks, PLC I/O modules, and smart actuator interfaces requiring stable component supply and long-term lifecycle support.
Supply support for LM3S1637-EQC50-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, specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and consumer markets.
The Stellaris LM3S series was designed as TI's first ARM-based microcontroller platform targeting cost-sensitive, real-time industrial control applications with integrated analog and low-power hibernation capabilities.
FAQ
What is the maximum operating frequency of the LM3S1637-EQC50-A2T?
The LM3S1637-EQC50-A2T 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 all on-chip peripherals including ADC, UARTs, and timers, with zero-wait-state access to both flash and SRAM. The LM3S1637-EQC50-A2T maintains deterministic timing behavior at this rate, making it suitable for hard real-time control loops.
Does the LM3S1637-EQC50-A2T support hibernation mode with RTC functionality?
Yes, the LM3S1637-EQC50-A2T includes a dedicated hibernation module that retains RTC timekeeping and 2 KB of RAM while drawing only 1.9 µA typical current. It supports wake-up events from external pins, RTC match, or low-battery detection. The LM3S1637-EQC50-A2T uses a separate VBAT supply path and internal regulation to maintain hibernation state independently of main power rails.
What analog peripherals are integrated into the LM3S1637-EQC50-A2T?
The LM3S1637-EQC50-A2T integrates an 8-channel 12-bit SAR ADC with hardware averaging, an analog comparator with programmable internal voltage reference, and an on-die temperature sensor. These functions operate independently of the main CPU clock and can be triggered by timer or GPIO events. The LM3S1637-EQC50-A2T does not include DAC or op-amps, but its ADC and comparator provide complete signal acquisition and threshold detection for sensor interfacing.
Is the LM3S1637-EQC50-A2T pin-compatible with other Stellaris LM3S devices?
The LM3S1637-EQC50-A2T shares the same 100-pin LQFP package and pinout with LM3S1601, LM3S1607, LM3S1621, and LM3S1627 within the LM3S16xx family. Signal mapping for GPIO, UART, SSI, I²C, and ADC is consistent across these variants. However, peripheral enablement and memory size differ - the LM3S1637-EQC50-A2T specifically enables hibernation and includes 256 KB flash, which must be verified against target firmware requirements.
What debug interface does the LM3S1637-EQC50-A2T support?
The LM3S1637-EQC50-A2T supports both JTAG and Serial Wire Debug (SWD) interfaces. SWD uses SWDIO and SWCLK pins for minimal two-wire debugging and programming, while full JTAG (TCK/TMS/TDI/TDO) is available for legacy tools. The LM3S1637-EQC50-A2T includes an integrated debug module compliant with ARM CoreSight standards, enabling breakpoints, watchpoints, and real-time memory inspection without halting system operation.
LM3S1637-EQC50-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:
- Obsolete
- Programmable:
- Not 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:
- 43
- 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 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1637-EQC50-A2T FAQ
1.How can I place an order for LM3S1637-EQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1637-EQC50-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 LM3S1637-EQC50-A2T reliable?
The price and inventory of LM3S1637-EQC50-A2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S1637-EQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S1637-EQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1637-EQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1637-EQC50-A2T?
LM3S1637-EQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1637-EQC50-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 LM3S1637-EQC50-A2T?
For technical support, including LM3S1637-EQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1637-EQC50-A2T requirements.
6.How does Aetrix verify that LM3S1637-EQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S1637-EQC50-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 LM3S1637-EQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S1637-EQC50-A2T?
All LM3S1637-EQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1637-EQC50-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 LM3S1637-EQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S1637-EQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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