My Inquiry
My Account
Texas Instruments LM3S1751-EQC50-A2
- Part No.:
- LM3S1751-EQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1751-EQC50-A2.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,477
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S1751-EQC50-A2 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. It operates at 50 MHz, supports -40°C to +105°C industrial temperature range, and targets embedded control in motor drives and industrial sensors.
For engineers reviewing the LM3S1751-EQC50-A2 datasheet, LM3S1751-EQC50-A2 pinout, LM3S1751-EQC50-A2 application, or LM3S1751-EQC50-A2 equivalent, key selection criteria include hibernation-enabled low-power operation, on-chip RTC with battery-backed memory, and dual UART + I²C + SSI peripheral set for sensor hub and motor control firmware integration.
Technical Context
The LM3S1751-EQC50-A2 implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU, supporting Thumb-2 instruction set and deterministic interrupt latency down to 12 cycles. Its system-level architecture integrates a hibernation module with real-time clock, battery-backed RAM, and wake-on-RTC/external-pin capability.
Peripherals include a 12-bit, 8-channel ADC with hardware averaging and temperature sensor, two UARTs with IrDA/SIR support, one I²C master/slave, one SSI, eight PWM outputs, and four 32-bit general-purpose timers-two of which support RTC mode. All peripherals are accessible via APB bus with configurable clock gating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max operation - enables deterministic real-time control with <12-cycle interrupt latency. |
| Flash Memory | 256 KB - sufficient for complex motor control algorithms with bootloader and field-upgradable firmware. |
| SRAM | 64 KB - supports multi-threaded RTOS operation and buffered sensor data acquisition. |
| ADC Resolution & Speed | 12-bit, up to 1 MSPS - captures fast transients in motor current sensing and power supply monitoring. |
| Hibernation Module | Integrated RTC + 2 KB battery-backed RAM - maintains timekeeping and critical state during deep sleep with <1.5 µA typical current draw. |
| Operating Temperature | -40°C to +105°C - qualified for under-hood automotive and industrial enclosure environments. |
| Package | 100-pin LQFP (EQC) - provides full peripheral access including 68 GPIOs, with thermal pad for enhanced power dissipation. |
Pinout & Package
LM3S1751-EQC50-A2 is housed in a 100-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad (EP). The package supports industrial-grade thermal performance and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Dedicated analog/digital/core rails enable noise isolation for ADC and PLL stability. |
| GND, GNDA, GNDC | Ground returns | Separate analog/digital/core ground planes reduce coupling and improve signal integrity. |
| OSC0/OSC1 | Crystal oscillator terminals | Supports 4–25 MHz crystal for main system clock; internal oscillator available for fallback. |
| RTCCLK | Real-time clock input | Accepts 32.768 kHz watch crystal for autonomous hibernation timing independent of main clock. |
| HBAT | Hibernation battery input | Connects external coin cell to retain RTC and 2 KB RAM during main power loss. |
| PD0–PD7, PE0–PE7, PF0–PF4, etc. | GPIO banks | 68 total GPIOs with programmable pull-up/down, slew rate control, and edge-triggered interrupts. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation module with RTC | Enables sub-µA retention mode with time-stamped wake-up events and battery-backed RAM for state recovery. |
| 12-bit ADC with hardware averaging | Reduces firmware overhead for noise suppression in analog sensor interfaces without CPU intervention. |
| Dual UARTs with IrDA/SIR support | Allows simultaneous serial diagnostics and infrared remote interface in space-constrained industrial devices. |
| Eight PWM outputs with dead-band generation | Supports three-phase motor control with complementary outputs and fault-shutdown protection logic. |
| Memory Protection Unit (MPU) | Enforces privilege separation between application and kernel code in RTOS-based firmware deployments. |
Applications
| Motor Control System | Industrial Sensor Hub |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC blowers and pump drives requiring precise timing and fault response. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, managing gate drivers via PWM, and monitoring current/voltage via ADC. Use Value: Integrated hibernation allows safe shutdown during brown-out; 50 MHz Cortex-M3 delivers <5 µs loop cycle for 20 kHz PWM update. | Use Scenario: Multi-sensor node aggregating temperature, pressure, and humidity data with local preprocessing and wireless upload. IC Role / Device Role / Timing Role: Central processing unit interfacing ADC, I²C sensors, and UART-to-LoRaWAN bridge. Use Value: Battery-backed RTC and 2 KB RAM retain calibration data and timestamps across power cycles; 68 GPIOs support flexible sensor expansion. |
| Smart Power Meter | Automotive Body Controller |
Use Scenario: DIN-rail mounted meter measuring voltage, current, and energy consumption with tamper detection and event logging. IC Role / Device Role / Timing Role: Real-time metering engine with ADC sampling synchronized to line frequency via timer capture. Use Value: Hardware-averaged 12-bit ADC achieves Class 0.5 accuracy; hibernation mode extends backup battery life to >10 years. | Use Scenario: Under-dash module managing door locks, window lifts, and interior lighting with CAN gateway functionality. IC Role / Device Role / Timing Role: Local intelligence node handling switch debouncing, PWM dimming, and wake-on-LIN/CAN activity. Use Value: Dual UARTs enable LIN physical layer bridging; -40°C to +105°C rating ensures reliability in vehicle cabin environments. |
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 core and package, but adds Ethernet MAC and PHY interface; flash increased to 256 KB, SRAM to 64 KB. | Targeted at networked industrial controllers requiring wired Ethernet connectivity. | Select LM3S1968 only if Ethernet is required; otherwise LM3S1751-EQC50-A2 offers lower cost and identical peripheral set for standalone control. |
| TM4C123GH6PM | Newer generation ARM Cortex-M4F core, 80 MHz, FPU, 256 KB flash, 32 KB SRAM, same 100-pin LQFP footprint. | Requires firmware porting due to peripheral register map changes and added FPU instructions. | TM4C123GH6PM offers higher performance and floating-point capability but lacks hibernation module - not suitable for ultra-low-power RTC-critical designs. |
Compared with LM3S1968-IQC50-A2 and TM4C123GH6PM, the LM3S1751-EQC50-A2 uniquely balances industrial temperature operation, hibernation-optimized power management, and mature peripheral compatibility - making it optimal for cost-sensitive, battery-aware embedded control where Ethernet or FPU are unnecessary.
Availability
LM3S1751-EQC50-A2 is available at Aetrix Electronics and suitable for motor control systems, industrial sensor hubs, smart power meters, and automotive body controllers requiring stable component supply and long-term lifecycle support.
Supply support for LM3S1751-EQC50-A2 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 digital signal processing technologies, with decades of experience in industrial and automotive microcontrollers.
The Stellaris LM3S series was designed specifically for cost-effective, high-integration 32-bit control in industrial automation, motor drives, and sensor nodes - emphasizing low-power hibernation, robust peripheral sets, and ARM Cortex-M3 software compatibility.
FAQ
What is the maximum operating frequency of the LM3S1751-EQC50-A2?
The LM3S1751-EQC50-A2 operates at a maximum system clock frequency of 50 MHz. This speed is achieved using the internal PLL driven by an external 4–25 MHz crystal or the internal 6 MHz oscillator. The 50 MHz clock feeds the Cortex-M3 core, memory subsystem, and all APB peripherals, enabling deterministic real-time execution for motor control and sensor processing tasks within the LM3S1751-EQC50-A2.
Does the LM3S1751-EQC50-A2 support hibernation mode with RTC and battery-backed memory?
Yes, the LM3S1751-EQC50-A2 integrates a dedicated hibernation module that supports RTC operation, 2 KB of battery-backed RAM, and wake-up from multiple sources including RTC match, external pins, and HIB interrupt. When powered from HBAT (a 3 V coin cell), the module draws as little as 1.5 µA while maintaining accurate timekeeping and preserving critical state - a core capability confirmed in the LM3S1751-EQC50-A2 datasheet Section 6.
How many ADC channels and what resolution does the LM3S1751-EQC50-A2 provide?
The LM3S1751-EQC50-A2 features a single 12-bit successive-approximation ADC with eight analog input channels. It supports up to 1 MSPS sampling rate, hardware sample averaging (2x–64x), and an integrated temperature sensor. These specifications are fully documented in Section 11 of the LM3S1751-EQC50-A2 datasheet and enable precision analog measurement in motor current sensing and environmental monitoring applications using the LM3S1751-EQC50-A2.
What communication interfaces are available on the LM3S1751-EQC50-A2?
The LM3S1751-EQC50-A2 provides two UARTs (with IrDA/SIR support), one I²C master/slave interface, one SSI (SPI-compatible) port, and GPIO-configurable bit-banged protocols. No CAN or USB interface is integrated. These interfaces are mapped to specific pins in the 100-pin LQFP package and are fully register-accessible per the LM3S1751-EQC50-A2 peripheral documentation - supporting sensor networking, diagnostics, and peripheral expansion without external transceivers.
Is the LM3S1751-EQC50-A2 pin-compatible with other Stellaris LM3S devices?
The LM3S1751-EQC50-A2 uses a 100-pin LQFP (EQC) package with a defined pinout documented in Section 1.3 and Appendix A of its datasheet. While several LM3S devices share the EQC package, pin compatibility is not guaranteed across variants - for example, LM3S1968-IQC50-A2 repurposes certain pins for Ethernet PHY signals. Engineers must verify signal mapping per device-specific datasheets; the LM3S1751-EQC50-A2 pinout is unique to its feature set and cannot be assumed interchangeable.
LM3S1751-EQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 56
- 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 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1751-EQC50-A2 FAQ
1.How can I place an order for LM3S1751-EQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1751-EQC50-A2 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 LM3S1751-EQC50-A2 reliable?
The price and inventory of LM3S1751-EQC50-A2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S1751-EQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S1751-EQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1751-EQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1751-EQC50-A2?
LM3S1751-EQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1751-EQC50-A2 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 LM3S1751-EQC50-A2?
For technical support, including LM3S1751-EQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1751-EQC50-A2 requirements.
6.How does Aetrix verify that LM3S1751-EQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S1751-EQC50-A2 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 LM3S1751-EQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S1751-EQC50-A2?
All LM3S1751-EQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1751-EQC50-A2, 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 LM3S1751-EQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S1751-EQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S1751-EQC50-A2 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
