LM3S5B91-IBZ80-C3T Texas Instruments Integrated Circuit (BGA) In Stock
The LM3S5B91-IBZ80-C3T is a 32-bit ARM Cortex-M3 Stellaris microcontroller from Texas Instruments with 72 I/O lines and DMA support. It integrates ADC channels and USB connectivity in a 108-ball BGA package for high-density embedded applications. Available for industrial control, networking, and human-machine interface designs requiring rich peripheral integration.
- Manufacturer
- Texas Instruments
- Package
- BGA
- Pin Count
- 108
- Lifecycle
- OBSOLETE
- Datasheet
- LM3S5B91-IBZ80-C3T 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-IBZ80-C3T?
- 32-bit ARM Cortex-M3 core delivering deterministic real-time control with hardware divide and multiply
- 72 general-purpose I/O lines enabling flexible peripheral connectivity in complex system designs
- Integrated DMA controller offloading data transfers to free CPU cycles for control algorithms
- Built-in ADC for direct analog sensor acquisition without external conversion circuitry
- 108-ball BGA package supporting high I/O density in compact industrial and networking PCB layouts
What is LM3S5B91-IBZ80-C3T used for?
The LM3S5B91-IBZ80-C3T suits industrial automation controllers, motor drives, and building management systems requiring a high-pin-count 32-bit MCU with rich peripheral integration. Its ARM Cortex-M3 core and DMA engine enable efficient handling of multiple communication interfaces such as UART, SPI, and I2C while concurrently processing analog sensor data. The 108-ball BGA form factor supports dense PCB designs in human-machine interface panels, networked field devices, and factory floor control modules.
What are the specifications of LM3S5B91-IBZ80-C3T?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Has ADC | YES |
| Bit Size | 32 |
| Clock Frequency-Max | 0.032MHz |
| DAC Channels | NO |
| DMA Channels | YES |
| JESD-30 Code | S-PBGA-B108 |
| JESD-609 Code | e1 |
| Number of I/O Lines | 72 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | GRID ARRAY |
| Qualification Status | Not Qualified |
| ROM Programmability | FLASH |
| Speed | 80MHz |
| Supply Voltage-Max | 1.32V |
| Supply Voltage-Min | 1.08V |
| Supply Voltage-Nom | 1.2V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | TIN SILVER COPPER |
| Terminal Form | BALL |
| Terminal Pitch | 0.8mm |
| Terminal Position | BOTTOM |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER |
| Package | BGA |
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 LM3S5B91-IBZ80-C3T datasheet?
LM3S5B91-IBZ80-C3T Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3S5B91-IBZ80-C3T?
Compatible alternatives and drop-in replacements for LM3S5B91-IBZ80-C3T:
Frequently Asked Questions
How many I/O lines does LM3S5B91-IBZ80-C3T provide and what communication peripherals does it support?
LM3S5B91-IBZ80-C3T offers 72 general-purpose I/O lines, supporting multiple UART, SPI, I2C, and CAN communication channels simultaneously. The ARM Cortex-M3 core at up to 80 MHz handles peripheral management alongside real-time control tasks, while the DMA controller moves data between peripherals and memory without CPU intervention, maximizing throughput in industrial automation systems.
What does the DMA controller in LM3S5B91-IBZ80-C3T enable in high-throughput data acquisition designs?
The DMA controller transfers data between ADC, UART, SPI, or memory blocks at up to 32 channels independently of the Cortex-M3 CPU. This allows continuous 12-bit ADC sampling at high sample rates while the processor executes control algorithms, reducing latency in real-time data acquisition systems that process analog sensor streams from 8 or more input channels concurrently.
What package does LM3S5B91-IBZ80-C3T use and what PCB design considerations does it require?
LM3S5B91-IBZ80-C3T uses a 108-ball PBGA package (S-PBGA-B108) with fine-pitch ball spacing, requiring at least 4-layer PCB stackup with controlled impedance traces for signal integrity. Decoupling capacitors of 100 nF should be placed within 1 mm of each VDD ball, and thermal vias are recommended beneath the package to manage junction temperature during sustained 80 MHz operation.
How does LM3S5B91-IBZ80-C3T compare to simpler PIC32 MCUs for networked industrial controller designs?
LM3S5B91-IBZ80-C3T offers 72 I/Os and integrated USB plus Ethernet MAC with CAN support in a single 32-bit ARM device, whereas comparable PIC32 parts often require external Ethernet or USB controller ICs to match that feature set. The ARM Cortex-M3 ecosystem provides a broader RTOS and middleware library selection including FreeRTOS, LwIP TCP/IP, and USB stacks, simplifying networked industrial controller firmware development.
Is LM3S5B91-IBZ80-C3T still in production and what is its recommended procurement strategy?
LM3S5B91-IBZ80-C3T belongs to Texas Instruments' legacy Stellaris MCU family, which has been superseded by the Tiva C Series (TM4C) lineup offering pin-compatible upgrade paths with identical ARM Cortex-M3 core and expanded memory options at 120 MHz. For new designs, evaluating TM4C1294 or TM4C123 variants is advisable, while existing LM3S5B91-IBZ80-C3T inventory remains available through authorized distributors for legacy production runs.
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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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