LM3S5B91-IQC80-B1 Texas Instruments Integrated Circuit (Other) In Stock
The LM3S5B91-IQC80-B1 is a 32-bit ARM Cortex-M3 microcontroller from Texas Instruments running at up to 80 MHz, with integrated Ethernet MAC/PHY, USB OTG, CAN, and 256 KB Flash. Offered in an LQFP-108 package, it targets industrial networking and control applications requiring rich connectivity.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 100
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM3S5B91-IQC80-B1?
- 32-bit ARM Cortex-M3 core running up to 80 MHz for high-performance control
- Integrated 10/100 Ethernet MAC/PHY with USB OTG and CAN bus interfaces
- 256 KB Flash and 96 KB SRAM for demanding embedded networking firmware
- Rich analog peripherals including 12-bit ADC and analog comparators
- Industrial temperature range operation for reliable deployment in harsh environments
What is LM3S5B91-IQC80-B1 used for?
The LM3S5B91-IQC80-B1 is designed for industrial networking gateways, process control systems, and factory automation nodes that require simultaneous Ethernet, USB, and CAN connectivity from a single MCU. Its Cortex-M3 core at 80 MHz and extensive peripheral set make it well suited for networked sensor aggregation, HMI controllers, and building automation equipment.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Country of Origin | Country of Origin |
What are equivalent replacements for LM3S5B91-IQC80-B1?
Compatible alternatives and drop-in replacements for LM3S5B91-IQC80-B1:
RISC Microcontroller, 32-Bit, FLASH, CORTEX-M3 CPU, 80MHz, CMOS, PBGA108
Frequently Asked Questions
Which industrial networking protocols can LM3S5B91-IQC80-B1 support natively with its on-chip peripherals?
The LM3S5B91-IQC80-B1 integrates an Ethernet MAC/PHY for TCP/IP networking, a CAN bus controller for industrial field bus communication, and USB OTG for host or device connectivity, all running on the 80 MHz ARM Cortex-M3 core. This allows a single MCU to serve as a multi-protocol industrial gateway.
For an industrial gateway design needing both Ethernet and CAN, does LM3S5B91-IQC80-B1 eliminate external network controllers?
Yes. The LM3S5B91-IQC80-B1 includes on-chip 10/100 Ethernet MAC/PHY and CAN bus interfaces, removing the need for external Ethernet PHY or CAN transceiver ICs in many designs. With 256 KB Flash available for protocol stacks, this integration significantly reduces BOM cost and PCB complexity.
How does the 80 MHz Cortex-M3 core handle concurrent Ethernet and USB data transfers without degrading real-time control loops?
At 80 MHz, the ARM Cortex-M3 in LM3S5B91-IQC80-B1 provides sufficient processing headroom to manage Ethernet packet handling, USB transfers, and real-time control tasks simultaneously using hardware interrupt prioritization and DMA channels. The 96 KB SRAM provides buffer space for network frames alongside control data structures.
What lifecycle considerations apply when selecting LM3S5B91-IQC80-B1 for new industrial designs today?
The LM3S5B91-IQC80-B1 belongs to the Stellaris LM3S family, which Texas Instruments has transitioned to the Tiva C series. Buyers should verify current lifecycle status and consider whether migrating to a supported Tiva C or successor MCU with equivalent 80 MHz Cortex-M3 performance and Ethernet connectivity better suits long-term production plans.
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Why Buy from FindMyChip
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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