LM3S5R36-IQR80-C3 Texas Instruments Integrated Circuit (Other) In Stock
32-bit ARM Cortex-M3 microcontroller running at up to 16 MHz with 33 I/O lines, ADC, DMA, and PWM channels in a 64-pin QFP package. Integrates peripheral-rich control features for embedded motor and industrial applications. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 64
- Lifecycle
- OBSOLETE
- Datasheet
- LM3S5R36-IQR80-C3 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM3S5R36-IQR80-C3?
- 32-bit ARM Cortex-M3 core at up to 16 MHz delivers deterministic real-time control for embedded industrial and motor applications
- 33 I/O lines combined with DMA and PWM channels support multi-axis sensor and actuator interfacing without external logic
- Integrated ADC enables direct analog signal acquisition from sensors at up to 1 MSPS, reducing BOM complexity in data-acquisition systems
What is LM3S5R36-IQR80-C3 used for?
The LM3S5R36-IQR80-C3 is designed for industrial control, building automation, and embedded systems that require a 32-bit processor with rich on-chip peripherals at low power. Its combination of ADC, DMA, and PWM channels makes it well suited for motor drive control loops, industrial sensor gateways, and HVAC actuator controllers. The 64-pin QFP package provides sufficient I/O for interfacing RS-485 field buses, analog sensors, and digital actuators in a single-chip solution.
What are the specifications of LM3S5R36-IQR80-C3?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Has ADC | YES |
| Bit Size | 32 |
| Clock Frequency-Max | 16MHz |
| DAC Channels | NO |
| DMA Channels | YES |
| JESD-30 Code | S-PQFP-G64 |
| Number of I/O Lines | 33 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | FLATPACK |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| ROM Programmability | FLASH |
| Speed | 80MHz |
| Supply Voltage-Max | 3.6V |
| Supply Voltage-Min | 3V |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| HTS Code | 8542.31.00.25 |
Where can I find the LM3S5R36-IQR80-C3 datasheet?
LM3S5R36-IQR80-C3 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3S5R36-IQR80-C3?
Compatible alternatives and drop-in replacements for LM3S5R36-IQR80-C3:
Frequently Asked Questions
What is the maximum clock frequency of the LM3S5R36-IQR80-C3, and how does that compare to competing Cortex-M3 parts at the same price point?
The LM3S5R36-IQR80-C3 operates at a maximum clock frequency of 16 MHz, which provides sufficient throughput for PID control loops running at 10 kHz sample rates and UART communication at up to 1 Mbps. Compared to STM32F103 parts that run at 72 MHz, the 16 MHz ceiling makes the LM3S5R36 better suited to low-power embedded control where compute intensity is modest and power consumption matters more than raw speed.
How many I/O lines does the LM3S5R36-IQR80-C3 provide, and is that sufficient for a multi-sensor industrial node?
The device provides 33 I/O lines, which is enough to handle a typical industrial sensor node with 8 digital sensor inputs, 4 PWM outputs for actuators, 4 analog inputs via the integrated ADC, and a dual-port RS-485 interface—all without external I/O expanders. This integration reduces BOM cost and simplifies PCB routing on a 2-layer board.
Does the LM3S5R36-IQR80-C3 include DMA support, and what advantage does that provide for ADC data logging?
Yes, the LM3S5R36-IQR80-C3 includes DMA channels that can automatically transfer ADC conversion results to SRAM without CPU intervention. For a data-logger sampling 4 analog channels at 1 kHz each, DMA offloads the transfer of 4,000 samples per second, freeing the Cortex-M3 core to process data or manage communication protocols, reducing CPU utilization by more than 50% in typical acquisition workloads.
What package does the LM3S5R36-IQR80-C3 use and how many pins does it have?
The LM3S5R36-IQR80-C3 is housed in a 64-pin PQFP (Plastic Quad Flat Package) with a 0.5 mm pin pitch, designated JESD-30 code S-PQFP-G64. The LQFP-64 footprint measures approximately 10 mm × 10 mm, offering a balance between I/O density and hand-solderability during prototyping—an advantage over smaller BGA packages when developing industrial control boards.
For a building automation controller that needs analog temperature sensing and PWM-based valve control, how does the LM3S5R36-IQR80-C3 reduce external component count?
The on-chip ADC handles analog temperature inputs from NTC thermistors directly at up to 1 MSPS per channel, while the integrated PWM channels drive proportional valve solenoids with 16-bit resolution. This eliminates the need for a separate ADC chip and PWM expander, cutting at least 4 components from the BOM and reducing PCB area by approximately 20% compared to a discrete analog front-end design.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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