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Texas Instruments LM3S817-IGZ50-C2
- Part No.:
- LM3S817-IGZ50-C2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
LM3S817-IGZ50-C2.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,468
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Product details
Overview
LM3S817-IGZ50-C2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 64 KB flash, 24 KB SRAM, integrated ADC (10-bit, 8-channel), dual UARTs, SSI, PWM, and analog comparator - designed for real-time motor control and industrial I/O systems operating at up to 50 MHz.
For engineers reviewing the LM3S817-IGZ50-C2 datasheet, LM3S817-IGZ50-C2 pinout, LM3S817-IGZ50-C2 application, or LM3S817-IGZ50-C2 equivalent, key selection criteria include its 50 MHz operation, 100-pin LQFP package, integrated motor control peripherals (PWM with dead-band, quadrature encoder input), and industrial temperature range (–40°C to +85°C).
Technical Context
The LM3S817-IGZ50-C2 implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU, supporting Thumb-2 instruction set and deterministic interrupt latency down to 12 cycles. It integrates dedicated motor control hardware including three 16-bit PWM generator blocks with independent dead-band generation and fault protection inputs.
Its analog subsystem includes an 8-channel, 10-bit SAR ADC with hardware averaging and internal temperature sensor, plus two independent analog comparators with programmable reference. Serial connectivity comprises two UARTs (one with IrDA support), one SSI (SPI-compatible), and JTAG debug interface with SWD compatibility.
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 |
| Memory | 64 KB on-chip flash (with 128-bit wide bus), 24 KB SRAM - supports in-application programming and execute-in-place |
| ADC | 10-bit SAR ADC with 8 input channels, 1 MSPS sample rate, hardware averaging up to 64 samples |
| PWM | 6 PWM outputs across 3 generator blocks; each supports dead-band insertion, fault shutdown, and edge-aligned/center-aligned modes |
| UART | Two UART modules; UART0 supports IrDA encoding/decoding and modem control signals |
| Operating Temp | –40°C to +85°C industrial grade - validated for continuous operation across full range |
| Package | 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) - compatible with standard reflow profiles and automated assembly |
Pinout & Package
LM3S817-IGZ50-C2 is housed in a 100-pin LQFP package (Pb-free, RoHS-compliant) with exposed thermal pad. Pin functions are multiplexed across GPIO, peripheral signals, and system controls - all pins support configurable slew rate and drive strength.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | VDD (digital core), VDDA (analog), VDDC (clock domain) - require separate decoupling per datasheet layout guidelines |
| GPIO Port A–F | Configurable digital I/O | Up to 69 GPIOs total; many support alternate functions (UART, SSI, PWM, ADC triggers) and edge-sensitive interrupts |
| SSI0CLK, SSI0FSS, SSI0RX, SSI0TX | Synchronous serial interface | Full-duplex SPI-compatible interface with programmable bit rate and FIFO buffering (8-deep TX/RX) |
| U0RX, U0TX, U1RX, U1TX | UART data lines | Two independent UARTs; U0 supports full modem handshake (RTS/CTS/DSR/DTR/DCD/RI) and IrDA |
| PWM0–PWM5 | PWM output terminals | Dedicated outputs from three 16-bit PWM generators - support complementary pair generation with dead-band control |
| ADC0, ADC1, ..., ADC7 | Analog input channels | Eight single-ended or four differential ADC inputs - mapped to physical pins with selectable sample sequencing |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Motor Control Peripherals | Three 16-bit PWM generators with dead-band insertion, fault shutdown inputs, and quadrature encoder interface - reduces external component count in BLDC/PMSM drives |
| Hardware-Accelerated Analog Subsystem | 10-bit ADC with 8-channel sequencer, hardware averaging (2–64 samples), and internal temperature sensor - enables closed-loop thermal monitoring without external ICs |
| Dual UART with Full Modem Support | UART0 provides RTS/CTS/DSR/DTR/DCD/RI signals and IrDA modulation - eliminates need for external level translators or IR transceivers |
| On-Chip Memory Protection Unit (MPU) | Configurable memory regions with privilege/access control - enforces separation between application code, bootloader, and peripheral registers in safety-critical firmware |
| JTAG + SWD Debug Interface | IEEE 1149.1-compliant JTAG TAP with SWD protocol support - allows debugging via standard tools (IAR, Keil, TI CCS) without requiring dedicated SWD pins |
Applications
| Industrial Motor Drive | Programmable Logic Controller (PLC) |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors in factory automation systems with real-time current sensing and thermal feedback. IC Role / Device Role / Timing Role: Central controller executing FOC algorithms, generating PWM waveforms with sub-microsecond timing precision, and sampling ADC channels synchronously with PWM events. Use Value: Integrated PWM dead-band, quadrature encoder input, and ADC trigger synchronization eliminate external logic and reduce BOM cost by ≥3 components per axis. | Use Scenario: Modular I/O processing unit in DIN-rail mounted PLCs handling discrete inputs, analog sensor readings, and serial fieldbus communication. IC Role / Device Role / Timing Role: Real-time I/O manager with deterministic interrupt response (<12-cycle latency), dual UARTs for Modbus RTU master/slave, and GPIOs configured as isolated digital inputs/outputs. Use Value: On-chip 24 KB SRAM buffers multiple Modbus transaction queues while 64 KB flash stores ladder logic interpreter and firmware - no external memory required. |
| Smart Power Meter | Embedded HMI Controller |
Use Scenario: Residential/utility-grade electricity meter measuring voltage, current, and power factor using shunt-based sensing and metrology-grade signal conditioning. IC Role / Device Role / Timing Role: Metrology co-processor acquiring synchronized voltage/current samples via ADC sequencer, computing RMS, harmonics, and energy accumulation in real time. Use Value: Hardware averaging (64-sample) and internal temperature sensor enable drift compensation - meets IEC 62053-21 Class 1 accuracy without calibration hardware. | Use Scenario: Local display and control unit for HVAC systems, featuring touch buttons, LED indicators, and RS-485 communication to central controllers. IC Role / Device Role / Timing Role: Human interface processor managing capacitive touch scanning, LED dimming via PWM, and UART-to-RS485 translation using GPIO-controlled direction control. Use Value: Six independent PWM outputs drive RGB LEDs and backlight with gamma correction; dual UARTs support simultaneous local debug and fieldbus communication. |
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 device with same Cortex-M4F core, 256 KB flash, 32 KB SRAM, enhanced ADC (12-bit, 1 MSPS), and USB OTG - requires PCB redesign due to 64-pin QFP vs. 100-pin LQFP | Supports USB host/device, higher-resolution analog acquisition, and floating-point math acceleration - suitable for next-gen designs needing connectivity or precision metrology | Select when upgrading legacy LM3S817-IGZ50-C2 designs with available board space and firmware migration effort. |
| STM32F103VGT6 | ARM Cortex-M3 MCU with 1 MB flash, 96 KB RAM, 12-bit ADC (16-channel), and CAN interface - differs in pinout, clock tree, and peripheral register mapping | Includes CAN 2.0B for industrial networking and larger memory for complex protocol stacks - lacks integrated analog comparator and quadrature encoder input | Choose for CAN-based distributed control systems where analog comparator or QEI are not required and vendor ecosystem alignment favors ST. |
Compared with TM4C123GH6PM and STM32F103VGT6, the LM3S817-IGZ50-C2 offers optimal integration for cost-sensitive motor control and PLC I/O where 100-pin LQFP packaging, analog comparator, and QEI are essential - without requiring USB or CAN.
Availability
LM3S817-IGZ50-C2 is available at Aetrix Electronics and suitable for industrial motor drives, programmable logic controllers, smart power meters, and embedded HMI controllers requiring stable component supply and long-term production continuity.
Supply support for LM3S817-IGZ50-C2 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, embedded processing, and wireless technologies for industrial, automotive, and consumer markets since 1930.
The Stellaris LM3S series was engineered specifically for real-time embedded control applications demanding high integration, deterministic performance, and industrial reliability - targeting motor control, factory automation, and intelligent sensing.
FAQ
What is the maximum operating frequency of the LM3S817-IGZ50-C2?
The LM3S817-IGZ50-C2 operates at a maximum system clock frequency of 50 MHz, achieved using the internal PLL with an external crystal or oscillator input. This frequency is fully supported across the industrial temperature range (–40°C to +85°C) and verified in production testing per TI's datasheet specifications. The LM3S817-IGZ50-C2 maintains timing compliance for all peripherals-including ADC sampling, PWM generation, and UART baud rates-at this speed.
Does the LM3S817-IGZ50-C2 support in-system programming (ISP) via UART?
Yes, the LM3S817-IGZ50-C2 supports in-system programming through UART0 using TI's ROM-based bootloader. This feature allows firmware updates without JTAG hardware, provided the device is configured to boot from ROM and UART0 is connected to a host with appropriate protocol framing. The LM3S817-IGZ50-C2 bootloader handles flash erase, write, and verify operations - enabling field upgrades in deployed industrial equipment.
What analog features are integrated into the LM3S817-IGZ50-C2?
The LM3S817-IGZ50-C2 integrates an 8-channel, 10-bit SAR ADC with hardware averaging (2–64 samples), an internal temperature sensor, and two independent analog comparators with programmable reference voltage. These features are accessible via dedicated pins and controlled through peripheral registers - no external signal conditioning is needed for basic thermal monitoring or threshold detection. All analog functions are specified and tested across the full industrial temperature range of the LM3S817-IGZ50-C2.
Is the LM3S817-IGZ50-C2 pin-compatible with other Stellaris LM3S devices?
No, the LM3S817-IGZ50-C2 is not pin-compatible with other LM3S family members such as the LM3S811 or LM3S3748 due to differences in pin count (100-pin vs. 64-pin or 48-pin), peripheral signal allocation, and power pin distribution. While register-level compatibility exists within the StellarisWare software framework, hardware design reuse requires verification against the specific LM3S817-IGZ50-C2 pin diagram and signal tables.
What debug interfaces does the LM3S817-IGZ50-C2 support?
The LM3S817-IGZ50-C2 supports IEEE 1149.1-compliant JTAG debugging and also implements Serial Wire Debug (SWD) protocol over the same physical pins (TCK, TMS, TDI, TDO, nSRST). This dual-mode capability enables use with standard JTAG emulators (e.g., XDS100v3) and SWD-only tools (e.g., CMSIS-DAP adapters). Debug access remains functional across the full operating voltage and temperature range of the LM3S817-IGZ50-C2.
LM3S817-IGZ50-C2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- Stellaris® ARM® Cortex®-M3S 800
- Packaging:
- Tray
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 30
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- A/D 6x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S817-IGZ50-C2 FAQ
1.How can I place an order for LM3S817-IGZ50-C2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S817-IGZ50-C2 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 LM3S817-IGZ50-C2 reliable?
The price and inventory of LM3S817-IGZ50-C2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S817-IGZ50-C2 is usually 5 days.
3.What payment methods are accepted for LM3S817-IGZ50-C2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S817-IGZ50-C2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S817-IGZ50-C2?
LM3S817-IGZ50-C2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S817-IGZ50-C2 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 LM3S817-IGZ50-C2?
For technical support, including LM3S817-IGZ50-C2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S817-IGZ50-C2 requirements.
6.How does Aetrix verify that LM3S817-IGZ50-C2 is sourced from the original manufacturer or authorized distributors?
All LM3S817-IGZ50-C2 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 LM3S817-IGZ50-C2 meets industry standards.
7.What is the process for return or replacement of LM3S817-IGZ50-C2?
All LM3S817-IGZ50-C2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S817-IGZ50-C2, 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 LM3S817-IGZ50-C2 part is unused and in its original packaging.
Return procedure for LM3S817-IGZ50-C2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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