MSP432P401RIZXHT Equivalent & Substitute Parts

Part Overview

The MSP432P401RIZXHT is an ARM Cortex-M4F 32-bit microcontroller manufactured by Texas Instruments, featuring 256KB FLASH memory, 64KB RAM, and operating at 48MHz. This device is classified as Obsolete, making identification of compatible alternatives essential for ongoing design support and production continuity. The MSP430FR5994 series provides functional equivalency through shared memory capacity, connectivity options, and operating temperature range, though with architectural differences in core processor type and memory technology.

Substiute Parts

MSP432P401RIZXHT

Texas InstrumentsIn Stock: 1032MSP432P401RIZXHT Datasheet

Current PartRFQ

MSP430FR5994IPMR

Texas InstrumentsIn Stock: 1862MSP430FR5994IPMR Datasheet

MFR RecommendedRFQ

MSP430FR5994IPNR

Texas InstrumentsIn Stock: 2000MSP430FR5994IPNR Datasheet

MFR RecommendedRFQ

MSP430FR5994IRGZR

Texas InstrumentsIn Stock: 6253MSP430FR5994IRGZR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MSP432P401RIZXHT is determined by the following allowable parameters:

• Program Memory Size: 256KB (256K x 8) — all substitute parts maintain this capacity
• Voltage Supply Range: 1.8V ~ 3.6V (substitute range) overlaps with original 1.62V ~ 3.7V
• Operating Temperature: -40°C ~ 85°C — maintained across all alternatives
• Connectivity: I2C, IrDA, SPI, UART/USART — preserved in all substitutes
• Peripherals: DMA, POR, PWM, WDT — core peripherals present in all alternatives
• RoHS3 Compliance and MSL 3 rating — consistent across all parts
• Manufacturer: Texas Instruments — all substitutes from same manufacturer

The MSP430FR5994 series substitutes differ in core processor architecture (MSP430 CPUXV2 16-bit vs. ARM Cortex-M4F 32-bit), memory technology (FRAM vs. FLASH), and package options. These differences are acceptable for applications where the functional requirements align with the substitute specifications.

Parameter Comparison

Engineering Selection Recommendations

All three MSP430FR5994 variants are Active products with ROHS3 compliance and identical MSL ratings, providing long-term availability and regulatory alignment. Selection among the three substitutes depends on package compatibility and I/O requirements:

• MSP430FR5994IPNR: 80-LQFP package with 68 I/O pins — closest I/O count to the original 64-pin BGA configuration
• MSP430FR5994IPMR: 64-LQFP package with 54 I/O pins — reduced I/O footprint for space-constrained applications
• MSP430FR5994IRGZR: 48-VFQFN package with 40 I/O pins — smallest form factor for minimal board space

All substitutes maintain the required connectivity interfaces (I2C, IrDA, SPI, UART/USART), core peripherals (DMA, POR, PWM, WDT), and operating temperature range. The transition from FLASH to FRAM memory technology in the MSP430FR5994 series offers non-volatile data retention without write cycles, though this requires firmware adaptation for memory access patterns.

Frequently Asked Questions (FAQ)

Q: Can MSP430FR5994 variants directly replace MSP432P401RIZXHT without firmware changes?

A: Direct replacement requires firmware evaluation. While connectivity and peripheral sets are preserved, the core processor architecture differs (16-bit MSP430 CPUXV2 vs. 32-bit ARM Cortex-M4F), and FRAM memory technology operates differently than FLASH. Code compiled for ARM Cortex-M4F requires recompilation for MSP430 architecture.

Q: What is the impact of reduced RAM in MSP430FR5994 (8KB vs. 64KB)?

A: Applications requiring large runtime data buffers or stack allocation must be evaluated against the 8KB RAM constraint. The 256KB FRAM program memory can be used for data storage through firmware design, partially offsetting the RAM reduction.

Q: Which MSP430FR5994 package variant is most suitable for BGA-to-LQFP migration?

A: MSP430FR5994IPNR (80-LQFP) provides the highest I/O pin count (68) among the three variants, closest to the original 64-pin configuration. MSP430FR5994IRGZR (48-VFQFN) requires the most significant I/O reduction and is suitable only for applications using fewer than 40 I/O pins.

Q: Are voltage supply ranges compatible between MSP432P401RIZXHT and MSP430FR5994 series?

A: The MSP430FR5994 supply range (1.8V ~ 3.6V) is a subset of the original (1.62V ~ 3.7V). Applications operating below 1.8V or above 3.6V require design modification or alternative component selection.

Q: What is the significance of FRAM vs. FLASH memory for system design?

A: FRAM (Ferroelectric RAM) in MSP430FR5994 provides unlimited write cycles and lower power consumption during write operations compared to FLASH. However, FRAM requires different memory access patterns and may have different latency characteristics. Firmware must be adapted accordingly.

Q: Do all three MSP430FR5994 variants have identical peripheral sets?

A: Yes. All three variants include I2C, IrDA, SPI, UART/USART connectivity and DMA, Brown-out Detect/Reset, POR, PWM, and WDT peripherals. Differences are limited to package type, I/O pin count, and data converter specifications (A/D resolution varies: 16x12b, 17x12b, or 20x12b).