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Texas Instruments LM3S1165-EQC50-A2
- Part No.:
- LM3S1165-EQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1165-EQC50-A2.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,578
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Product details
Overview
LM3S1165-EQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated hibernation module, 8-channel 10-bit ADC, and dual UARTs. It operates at 50 MHz, supports 3.3 V operation, and targets embedded control in industrial automation, motor drives, and sensor nodes.
For engineers reviewing the LM3S1165-EQC50-A2 datasheet, LM3S1165-EQC50-A2 pinout, LM3S1165-EQC50-A2 application, or LM3S1165-EQC50-A2 equivalent, key selection criteria include hibernation-capable RTC, on-chip analog peripherals, Cortex-M3 interrupt latency, and QFP-100 package compatibility for space-constrained designs.
Technical Context
The LM3S1165-EQC50-A2 integrates an ARM Cortex-M3 core with nested vectored interrupt controller (NVIC), memory protection unit (MPU), and SysTick timer. It features a dedicated hibernation module with battery-backed RTC and 2 KB SRAM, enabling ultra-low-power wake-up from deep sleep states.
Peripherals include two UARTs supporting IrDA/SIR, one I²C master/slave interface, one SSI port, eight PWM outputs, and an 8-channel 10-bit ADC with hardware averaging. Clock management supports multiple internal/external sources with PLL-based 50 MHz system clock generation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, 50 MHz max operation - enables deterministic real-time control with <12-cycle interrupt latency. |
| Flash Memory | 256 KB on-chip flash - sufficient for complex firmware including StellarisWare drivers and RTOS integration. |
| SRAM | 32 KB main SRAM + 2 KB hibernate SRAM - supports active data buffering and retained state during battery-powered sleep. |
| ADC | 8-channel, 10-bit SAR ADC with hardware averaging - delivers stable measurements for analog sensor interfaces without host CPU overhead. |
| Hibernation Module | Dedicated RTC, battery backup support, wake-on-RTC/external-pin - reduces system power to ~1.4 µA in hibernate mode. |
| Package | 100-pin LQFP (EQC), 14 × 14 mm body, 0.5 mm pitch - compatible with standard PCB assembly and thermal management for industrial ambient. |
| Operating Voltage | 3.0 V to 3.6 V - matches common industrial 3.3 V supply rails and simplifies power design with single LDO. |
Pinout & Package
LM3S1165-EQC50-A2 uses a 100-pin LQFP (EQC) package with exposed thermal pad. Pin functions are defined per TI SPMS014I datasheet Rev I, July 2014.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate digital, analog, and core domains enable noise isolation and precise ADC reference stability. |
| GND, GNDA, GNDC | Ground returns | Dedicated analog/digital/core ground pins reduce coupling and improve signal integrity in mixed-signal operation. |
| OSC0/OSC1 | Crystal oscillator terminals | Supports 4–25 MHz external crystal for primary clock source; internal oscillator available for fallback. |
| HIB, RTCCLK, HIBRST | Hibernation control signals | Enable battery-backed RTC operation, controlled hibernate entry/exit, and wake-up event detection. |
| PA0–PA7, PB0–PB7, etc. | GPIO banks A–F | Configurable as digital I/O, peripheral function pins (UART, SSI, I²C), or ADC inputs - supports multiplexed peripheral routing. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation module with RTC | Retains timekeeping and 2 KB SRAM while drawing ≤1.4 µA - eliminates need for external RTC and backup controller in battery-critical systems. |
| Integrated 10-bit ADC | 8-channel sampling with configurable sequencers and hardware averaging - reduces firmware overhead and improves measurement repeatability for sensor front-ends. |
| Dual UART with IrDA/SIR | Full-duplex serial communication with infrared encoding support - enables direct connection to legacy IR devices and industrial HMIs without external transceivers. |
| Cortex-M3 NVIC | 240-vector interrupt controller with programmable priority grouping - ensures deterministic response to time-critical events like PWM fault or ADC conversion complete. |
| Memory Protection Unit (MPU) | Configurable region-based access control - enforces code/data separation and prevents accidental overwrites in safety-aware applications. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop speed/torque control of BLDC motors in factory automation equipment with thermal monitoring and fault reporting. IC Role / Device Role / Timing Role: Main system controller executing FOC algorithms, managing PWM timing, reading current/voltage/temperature sensors via ADC, and communicating status via UART. Use Value: Integrated hibernation allows safe shutdown during idle periods; 50 MHz Cortex-M3 provides margin for real-time computation under load. | Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and pressure with periodic wireless upload. IC Role / Device Role / Timing Role: Central data acquisition and low-power scheduler - samples sensors, stores logs in SRAM, wakes every 10 minutes using RTC alarm, transmits via UART-connected radio. Use Value: Hibernate current of 1.4 µA extends battery life to >5 years on coin cell; on-chip ADC eliminates external signal conditioning ICs. |
| Programmable Logic Controller (PLC) I/O Module | Human-Machine Interface (HMI) Terminal |
Use Scenario: DIN-rail mounted I/O expansion module with digital input/output, analog input, and RS-485 communication for distributed control. IC Role / Device Role / Timing Role: Local intelligence layer handling debounce, scaling, diagnostics, and protocol translation between field devices and backplane bus. Use Value: Dual UARTs support simultaneous Modbus RTU master/slave roles; GPIO flexibility enables configurable input filtering and output drive strength. | Use Scenario: Touch-enabled local operator panel with LED indicators, pushbutton inputs, and serial display interface in machinery control cabinets. IC Role / Device Role / Timing Role: Display controller and UI processor - manages touch scan, button debouncing, LED PWM dimming, and UART command parsing for display updates. Use Value: Eight PWM channels drive independent LEDs or backlight zones; hibernation preserves UI state during power loss with fast resume. |
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 Cortex-M4F core, 256 KB flash, but higher 80 MHz clock, USB OTG, and enhanced analog performance. | Requires updated firmware for FPU usage and USB stack; not drop-in due to pinout changes and peripheral register mapping differences. | Select when needing USB connectivity, floating-point math acceleration, or longer product lifecycle support beyond LM3S end-of-life. |
| STM32F103VCT6 | ARM Cortex-M3 at 72 MHz, 256 KB flash, 48 KB SRAM, but lacks integrated hibernation module and battery-backed RTC. | Requires external RTC and backup power circuitry for low-power timekeeping; different peripheral set (no hibernation logic or dedicated hibernate SRAM). | Select when prioritizing higher clock speed and larger RAM, and when external RTC integration is acceptable for power budget. |
Compared with TM4C123GH6PM and STM32F103VCT6, the LM3S1165-EQC50-A2 offers unique hibernation capability with sub-µA retention and integrated RTC - critical for battery-operated systems where external components must be minimized and firmware complexity reduced.
Availability
LM3S1165-EQC50-A2 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and HMI terminals requiring stable component supply and long-term obsolescence management.
Supply support for LM3S1165-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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and consumer markets.
The Stellaris LM3S family was designed as TI's first ARM-based microcontroller line targeting cost-sensitive, real-time embedded applications with integrated analog and low-power hibernation - bridging the gap between 8-bit MCUs and high-end application processors.
FAQ
What is the maximum operating frequency of the LM3S1165-EQC50-A2?
The LM3S1165-EQC50-A2 operates at a maximum system clock frequency of 50 MHz, achieved via its internal PLL driven by an external crystal (4–25 MHz) or internal oscillator. This frequency is specified under full industrial temperature range (–40°C to +105°C) and 3.3 V supply conditions per TI SPMS014I datasheet Section 5.2.4.
Does the LM3S1165-EQC50-A2 support hardware debugging?
Yes, the LM3S1165-EQC50-A2 includes full JTAG debug support compliant with IEEE 1149.1, with integrated SWD-compatible TAP controller, debug halt capability, and breakpoints/watchpoints. Debug access is available through dedicated TDI, TDO, TCK, TMS, and nTRST pins as documented in Section 4 of the SPMS014I datasheet.
What is the purpose of the hibernation module in the LM3S1165-EQC50-A2?
The hibernation module in the LM3S1165-EQC50-A2 provides ultra-low-power retention mode with battery-backed real-time clock and 2 KB SRAM. It enables wake-up from currents as low as 1.4 µA using RTC alarms or external pins - eliminating the need for external RTC chips in battery-powered applications where runtime and shelf life are critical.
Can the LM3S1165-EQC50-A2 operate from a single 3.3 V supply?
Yes, the LM3S1165-EQC50-A2 is designed for single-supply operation at 3.3 V nominal (3.0 V to 3.6 V range). It integrates separate VDDA (analog), VDDC (core), and VDD (digital) supply domains with internal regulation, allowing clean analog measurements and stable core operation without external voltage translators or regulators.
How many UART interfaces does the LM3S1165-EQC50-A2 include?
The LM3S1165-EQC50-A2 includes two independent UART peripherals, each supporting full-duplex asynchronous communication, programmable baud rates, FIFO buffering, and IrDA/SIR infrared encoding. Both UARTs are fully functional with dedicated TX/RX/CTS/RTS pins and share no resource conflicts in standard configurations per Section 12 of SPMS014I.
LM3S1165-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:
- 43
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K 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:
LM3S1165-EQC50-A2 FAQ
1.How can I place an order for LM3S1165-EQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1165-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 LM3S1165-EQC50-A2 reliable?
The price and inventory of LM3S1165-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 LM3S1165-EQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S1165-EQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1165-EQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1165-EQC50-A2?
LM3S1165-EQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1165-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 LM3S1165-EQC50-A2?
For technical support, including LM3S1165-EQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1165-EQC50-A2 requirements.
6.How does Aetrix verify that LM3S1165-EQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S1165-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 LM3S1165-EQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S1165-EQC50-A2?
All LM3S1165-EQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1165-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 LM3S1165-EQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S1165-EQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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