STR911FAM47X6 Equivalent & Substitute Parts

Part Overview

The STR911FAM47X6 is an ARM9® STR9 32-bit microcontroller manufactured by STMicroelectronics, featuring 96MHz clock speed, 2MB FLASH program memory, and 96K RAM. This device integrates multiple communication interfaces including CANbus, I2C, IrDA, Microwire, SPI, SSP, UART/USART, and USB connectivity. The STR911FAM47X6 is classified as obsolete, necessitating identification of functionally equivalent active alternatives for new designs and production continuity.

Substiute Parts

STR911FAM47X6

STMicroelectronicsIn Stock: 1441STR911FAM47X6 Datasheet

Current PartRFQ

STM32F469VIT6

STMicroelectronicsIn Stock: 667112STM32F469VIT6 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STR911FAM47X6 is based on the following critical parameters:

Memory Configuration: Both the main part and substitute maintain 2MB FLASH program memory capacity, ensuring firmware compatibility for applications with equivalent code storage requirements.

Manufacturer Continuity: STMicroelectronics remains the manufacturer for the substitute part, maintaining design support, documentation, and supply chain consistency.

Communication Interfaces: The substitute part retains core connectivity protocols including CANbus, I2C, SPI, UART/USART, and USB, supporting existing hardware integration requirements.

Operating Temperature Range: Both devices operate across the industrial temperature range of -40°C to 85°C, maintaining thermal performance specifications.

Compliance Standards: Both parts maintain ROHS3 compliance and identical ECCN/HTSUS classifications, ensuring regulatory and export control consistency.

Packaging Classification: Surface mount technology is maintained across both devices, supporting existing PCB assembly processes.

The STM32F469VIT6 substitute represents an active product with enhanced specifications in processing capability, expanded I/O count, and increased RAM capacity, while maintaining backward compatibility in core memory and communication requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The STR911FAM47X6 is classified as obsolete. The STM32F469VIT6 is an active product with confirmed ongoing manufacturing and supply availability, making it suitable for new designs and long-term production requirements.

Compliance and Certification: Both devices maintain ROHS3 compliance and identical ECCN/HTSUS classifications (3A991A2 / 8542.31.0001), ensuring regulatory consistency and export control alignment.

Memory Equivalence: Both microcontrollers provide 2MB FLASH program memory, supporting applications with equivalent firmware storage requirements. The STM32F469VIT6 provides 384K RAM compared to 96K in the original part, offering expanded runtime memory capacity.

Communication Protocol Support: Core communication interfaces (CANbus, I2C, SPI, UART/USART, USB) are maintained in the substitute part. The STM32F469VIT6 includes additional interfaces (Ethernet, LINbus, USB OTG, SDIO) that may benefit system integration but are not required for basic substitution.

Package Transition: The STM32F469VIT6 uses a 100-LQFP package compared to the 80-LQFP of the original part. PCB redesign is required to accommodate the increased pin count and package dimensions.

Thermal Performance: Both devices operate across -40°C to 85°C, maintaining industrial temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can the STM32F469VIT6 directly replace the STR911FAM47X6 without PCB modifications?

A: No. The STM32F469VIT6 uses a 100-LQFP package with 100 pins, while the STR911FAM47X6 uses an 80-LQFP package with 80 pins. PCB redesign is required to accommodate the different pin count and package footprint.

Q: Are the program memory capacities equivalent between these devices?

A: Yes. Both the STR911FAM47X6 and STM32F469VIT6 provide 2MB FLASH program memory, supporting applications with equivalent firmware storage requirements.

Q: What communication interfaces are common to both microcontrollers?

A: Both devices support CANbus, I2C, IrDA, SPI, UART/USART, and USB connectivity. The STM32F469VIT6 includes additional interfaces such as Ethernet, LINbus, USB OTG, and SDIO.

Q: Is the supply voltage range compatible between these parts?

A: The STR911FAM47X6 operates at 1.65V to 2V, while the STM32F469VIT6 operates at 1.7V to 3.6V. The substitute part supports a wider voltage range, requiring power supply circuit evaluation for existing designs.

Q: Do both devices maintain the same operating temperature range?

A: Yes. Both the STR911FAM47X6 and STM32F469VIT6 operate across -40°C to 85°C, maintaining industrial temperature specifications.

Q: Are there differences in data converter capabilities?

A: Yes. The STR911FAM47X6 includes 8-channel 10-bit analog-to-digital converters. The STM32F469VIT6 provides 14-channel 12-bit ADC and 2-channel 12-bit DAC, offering higher resolution and additional conversion channels.

Q: What is the impact of the increased RAM in the STM32F469VIT6?

A: The STM32F469VIT6 provides 384K RAM compared to 96K in the STR911FAM47X6. This 4x increase in runtime memory capacity supports more complex applications and larger data structures without requiring external memory.

Q: Are both devices RoHS compliant?

A: Yes. Both the STR911FAM47X6 and STM32F469VIT6 are ROHS3 compliant with identical moisture sensitivity levels (MSL 3, 168 hours).

Q: What is the clock speed difference between these microcontrollers?

A: The STR911FAM47X6 operates at 96MHz, while the STM32F469VIT6 operates at 180MHz. The substitute part provides approximately 1.9x higher processing performance.

Q: Are the I/O pin counts the same?

A: No. The STR911FAM47X6 provides 40 I/O pins, while the STM32F469VIT6 provides 71 I/O pins. The increased pin count in the substitute part enables additional peripheral connections and system integration options.