LM3S5B91-IQC80-C1 Texas Instruments Integrated Circuit (Other) In Stock
Texas Instruments LM3S5B91-IQC80-C1 is a 32-bit ARM Cortex-M3 microcontroller running up to 80 MHz with 72 GPIO pins in a 100-pin LQFP package. It integrates DMA, PWM channels, and a 12-bit ADC for demanding embedded control applications. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 100
- Lifecycle
- OBSOLETE
- Datasheet
- LM3S5B91-IQC80-C1 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 LM3S5B91-IQC80-C1?
- 32-bit ARM Cortex-M3 core at up to 80 MHz with 256 KB flash and 64 KB SRAM for real-time embedded processing
- 72 I/O lines and hardware DMA support enabling high-throughput peripheral data transfers without CPU intervention
- Integrated PWM channels and 12-bit ADC providing motor-control and analog-sensing capability in a single SoC
- RoHS-compliant 100-pin LQFP package ensuring regulatory compliance for consumer and industrial end products
What is LM3S5B91-IQC80-C1 used for?
The LM3S5B91-IQC80-C1 is suited for industrial motor control, factory automation, and building management systems requiring real-time response with a high I/O count. Its 72 GPIO pins and DMA channels allow simultaneous management of multiple sensors, actuators, and communication buses without processor overhead bottlenecks. The device also serves as a network-edge controller in smart grid applications where PWM generation and 12-bit ADC sampling are needed alongside serial communication.
What are the specifications of LM3S5B91-IQC80-C1?
| YTEOL | 0 |
| Has ADC | YES |
| Bit Size | 32 |
| Clock Frequency-Max | 16MHz |
| DAC Channels | NO |
| DMA Channels | YES |
| JESD-30 Code | S-PQFP-G100 |
| Number of I/O Lines | 72 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | FLATPACK |
| 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 |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.31.00.25 |
Where can I find the LM3S5B91-IQC80-C1 datasheet?
LM3S5B91-IQC80-C1 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3S5B91-IQC80-C1?
Compatible alternatives and drop-in replacements for LM3S5B91-IQC80-C1:
Frequently Asked Questions
What is the maximum operating clock frequency of LM3S5B91-IQC80-C1 and how does it affect real-time performance?
The LM3S5B91-IQC80-C1 runs at up to 80 MHz, delivering 80 DMIPS with the ARM Cortex-M3 core. This throughput allows a 1 ms RTOS tick with FreeRTOS while still executing ISRs in under 50 ns, meeting the real-time requirements of motor-control and communications applications that demand microsecond-level event response.
How many I/O pins does LM3S5B91-IQC80-C1 provide and what peripheral types can they be multiplexed to?
The LM3S5B91-IQC80-C1 provides 72 I/O lines that can be individually configured as digital GPIO, ADC inputs, PWM outputs, UART, SPI, I2C, or CAN signals. This flexibility allows a single 100-pin LQFP device to interface with up to 4 UART ports, 2 SPI buses, 2 I2C buses, and 1 CAN 2.0 bus simultaneously, reducing the external bridge-IC count in multi-protocol system designs.
What ADC resolution and channel count does LM3S5B91-IQC80-C1 offer for analog signal acquisition?
The LM3S5B91-IQC80-C1 integrates a 12-bit SAR ADC with up to 8 analog input channels, providing 4096-step resolution for accurate sensing of voltage, current, and temperature signals. At 80 MHz, the ADC achieves a sample rate up to 1 MSPS per channel, enabling simultaneous multi-channel acquisition through the hardware sequencer without CPU scheduling overhead.
When is LM3S5B91-IQC80-C1 a practical choice for industrial automation over a Cortex-M4 device?
LM3S5B91-IQC80-C1 is practical for designs already based on the LM3S Stellaris platform that need firmware portability and pin-compatible board revision without migrating to a new toolchain. The 80 MHz Cortex-M3 and 72 I/O pins satisfy most industrial PLC I/O expansion and gateway tasks, and the LQFP-100 package is compatible with standard wave or reflow soldering, whereas Cortex-M4 devices in BGA packages add assembly complexity and cost.
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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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