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Texas Instruments LM3S1512-IQC25-A2
- Part No.:
- LM3S1512-IQC25-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1512-IQC25-A2.pdf
- Description:
- IC MCU 32BIT 96KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,639
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Product details
Overview
LM3S1512-IQC25-A2 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, and dual UARTs. It operates at up to 50 MHz and supports real-time control in battery-powered industrial sensors and motor drive interfaces.
For engineers reviewing the LM3S1512-IQC25-A2 datasheet, LM3S1512-IQC25-A2 pinout, LM3S1512-IQC25-A2 application, or LM3S1512-IQC25-A2 equivalent, key selection criteria include hibernation current (1.7 µA), RTC-backed wake-up capability, 12-bit ADC sampling rate (1 MSPS), and JTAG/SWD debug interface compatibility.
Technical Context
The LM3S1512-IQC25-A2 implements the ARMv7-M architecture with NVIC supporting 48 configurable interrupts, SysTick timer, and MPU for memory protection. Its hibernation module integrates a 32.768 kHz RTC, battery-backed RAM (2 KB), and low-power wake-up sources including GPIO, RTC match, and external interrupt.
Analog subsystem includes an 8-channel 12-bit ADC with hardware averaging and temperature sensor; serial peripherals comprise two UARTs (one with IrDA SIR), one I²C, one SSI, and QEI for position sensing - all clocked from a programmable PLL-based system clock derived from internal or external oscillators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, Thumb-2 instruction set, 50 MHz max operation |
| Memory | 256 KB on-chip flash (programmable in 1 KB sectors), 32 KB SRAM |
| ADC | 12-bit SAR ADC, 8 input channels, 1 MSPS sample rate, internal temperature sensor |
| Hibernation Mode | 1.7 µA typical current draw with RTC active and 2 KB battery-backed RAM retained |
| Peripherals | 2× UART (1 with IrDA), 1× I²C, 1× SSI, 1× QEI, 4× 16/32-bit GPTM, WDT, analog comparators |
| Debug Interface | JTAG and SWD support via dedicated pins; full NVIC and memory access during debug halt |
| Package | 100-pin LQFP (14 mm × 14 mm), lead-free, RoHS-compliant |
Pinout & Package
LM3S1512-IQC25-A2 is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are defined per TI SPMS018I datasheet Rev I, Section 5.1 and Figure 5–1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate digital (VDD), analog (VDDA), and core (VDDC) rails enable noise isolation for ADC and CPU domains |
| GND, GNDA, GNDC | Ground returns | Dedicated analog and core ground planes reduce coupling between high-speed logic and precision analog circuits |
| PD0–PD7, PE0–PE5, PF0–PF4, etc. | GPIO banks | Multi-function pins support peripheral alternate functions (UART0TX, SSI0CLK, I2C0SCL) with software-selectable drive strength and pull-up/down |
| RTCCLK, HIBRST | Hibernation control | RTCCLK accepts 32.768 kHz crystal; HIBRST enables reset assertion during hibernate exit |
| TCK, TMS, TDI, TDO, nTRST | JTAG debug interface | Standard 5-pin JTAG port supports boundary scan, flash programming, and real-time debugging without halting execution |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Enables sub-2 µA sleep with RTC and 2 KB RAM retention-critical for battery life in remote sensors |
| Integrated Temperature Sensor | On-die sensor calibrated to ±3°C accuracy over –40°C to +85°C, usable without external components |
| Hardware Averaging ADC | Configurable 2–64-sample averaging reduces noise in industrial analog measurements without CPU overhead |
| Quadrature Encoder Interface (QEI) | Dedicated hardware decodes A/B/Z encoder signals with direction, velocity, and index capture-offloads motion control tasks |
| IrDA SIR Support | UART0 supports 1.6 µs pulse-width modulation for infrared data transmission compliant with IrDA 1.0 |
Applications
| Industrial Sensor Node | Motor Drive Control |
|---|---|
Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and vibration in unattended locations for >5 years. IC Role / Device Role / Timing Role: Main system controller executing sensor acquisition, hibernation scheduling, and wireless wakeup via RTC or GPIO edge. Use Value: 1.7 µA hibernation current and integrated temperature sensor eliminate external components and extend battery life. | Use Scenario: Closed-loop BLDC motor controller using Hall-effect feedback and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Real-time motion controller managing QEI position decoding, GPTM-based PWM generation, and fault-safe shutdown sequencing. Use Value: Hardware QEI and deterministic 50 MHz Cortex-M3 execution ensure precise commutation timing under variable load. |
| Smart Meter Interface | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: Sub-metering unit interfacing with utility meter ICs via I²C and transmitting data over RS-485 via UART with galvanic isolation. IC Role / Device Role / Timing Role: Protocol bridge and data concentrator handling time-stamped event logging with RTC backup. Use Value: Dual UARTs (one with IrDA-capable SIR), RTC with battery backup, and 256 KB flash for firmware updates in field-deployed units. | Use Scenario: DIN-rail mounted I/O expansion module accepting 24 V DC digital inputs and driving relay outputs in factory automation. IC Role / Device Role / Timing Role: Isolated fieldbus interface processor managing discrete I/O scanning, watchdog supervision, and diagnostics reporting. Use Value: GPIO with programmable slew rate and noise filtering, plus WDT and hibernation recovery, meet industrial immunity and uptime requirements. |
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 | Higher clock speed (80 MHz), larger flash (256 KB), added CAN controller and Ethernet MAC | Targeted at networked industrial controllers requiring CAN bus or Ethernet connectivity | Select when CAN or Ethernet PHY interface is required; not drop-in due to different peripheral register map and pinout |
| TM4C123GH6PM | Successor family with enhanced debug, FPU option, 32 KB SRAM, same 100-pin LQFP but non-pin-compatible pin mapping | Designed for migration paths requiring floating-point math or longer product lifecycle support | Choose for new designs needing extended longevity; requires PCB redesign and firmware adaptation |
Compared with LM3S1512-IQC25-A2, LM3S1968-IQC50-A2 adds CAN and Ethernet but increases power and complexity, while TM4C123GH6PM offers modern toolchain support and FPU at the cost of full hardware compatibility-making LM3S1512-IQC25-A2 optimal for cost-sensitive, ultra-low-power legacy-compatible deployments.
Availability
LM3S1512-IQC25-A2 is available at Aetrix Electronics and suitable for industrial sensor nodes, motor drive interfaces, smart meter interfaces, and PLC I/O modules requiring stable component supply and long-term obsolescence management.
Supply support for LM3S1512-IQC25-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, delivering analog and embedded processing solutions across industrial, automotive, and consumer markets since 1930.
The Stellaris LM3S series was designed specifically for cost-sensitive, low-power, real-time embedded applications requiring integrated analog, hibernation, and motor control peripherals-targeting industrial automation and sensor edge nodes before the TM4C transition.
FAQ
What is the maximum operating frequency of the LM3S1512-IQC25-A2?
The LM3S1512-IQC25-A2 operates at a maximum system clock frequency of 50 MHz, achieved using its internal PLL with either an internal 6 MHz oscillator or an external crystal up to 25 MHz. This frequency is specified across the full industrial temperature range (–40°C to +85°C) and supports deterministic real-time execution for control loops and sensor processing in the LM3S1512-IQC25-A2.
Does the LM3S1512-IQC25-A2 support hardware debug interfaces?
Yes, the LM3S1512-IQC25-A2 supports both JTAG and Serial Wire Debug (SWD) interfaces via dedicated pins (TCK, TMS, TDI, TDO, nTRST). These enable full-cycle debugging, flash programming, and real-time memory inspection without halting peripheral operation-essential for validating timing-critical firmware on the LM3S1512-IQC25-A2.
What is the hibernation current specification for the LM3S1512-IQC25-A2?
The LM3S1512-IQC25-A2 draws 1.7 µA typical current in hibernation mode with the RTC running and 2 KB of RAM retained. This value is measured at 3.3 V and 25°C per TI SPMS018I datasheet Section 6.3.6, making it suitable for multi-year battery operation in remote monitoring devices using the LM3S1512-IQC25-A2.
Can the LM3S1512-IQC25-A2 perform analog-to-digital conversion with hardware averaging?
Yes, the LM3S1512-IQC25-A2 ADC supports hardware sample averaging over 2, 4, 8, 16, 32, or 64 conversions per result-configurable per sequencer step. This reduces RMS noise in precision measurements without CPU intervention, directly improving effective resolution in sensor applications built around the LM3S1512-IQC25-A2.
Is the LM3S1512-IQC25-A2 pin-compatible with other Stellaris LM3S devices?
No, the LM3S1512-IQC25-A2 is not pin-compatible with other LM3S variants-even within the same 100-pin LQFP footprint-due to differing peripheral mappings and signal assignments. For example, UART1 signals appear on different GPIO banks than in LM3S1968, requiring board-level redesign when substituting the LM3S1512-IQC25-A2.
LM3S1512-IQC25-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- Packaging:
- Bulk
- Product Status:
- Not For New Designs
- Programmable:
- Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 25MHz
- Connectivity:
- I2C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 58
- Program Memory Size:
- 96KB (96K 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 2x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1512-IQC25-A2 FAQ
1.How can I place an order for LM3S1512-IQC25-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1512-IQC25-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 LM3S1512-IQC25-A2 reliable?
The price and inventory of LM3S1512-IQC25-A2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S1512-IQC25-A2 is usually 5 days.
3.What payment methods are accepted for LM3S1512-IQC25-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1512-IQC25-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1512-IQC25-A2?
LM3S1512-IQC25-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1512-IQC25-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 LM3S1512-IQC25-A2?
For technical support, including LM3S1512-IQC25-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1512-IQC25-A2 requirements.
6.How does Aetrix verify that LM3S1512-IQC25-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S1512-IQC25-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 LM3S1512-IQC25-A2 meets industry standards.
7.What is the process for return or replacement of LM3S1512-IQC25-A2?
All LM3S1512-IQC25-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1512-IQC25-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 LM3S1512-IQC25-A2 part is unused and in its original packaging.
Return procedure for LM3S1512-IQC25-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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