MSP432P401RIPZ Equivalent & Substitute Parts

Part Overview

The MSP432P401RIPZ is an ARM Cortex-M4F 32-bit microcontroller manufactured by Texas Instruments, featuring 256KB FLASH memory, 64KB RAM, and 84 I/O pins in a 100-LQFP package. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The MSP432P401 series provides high-performance embedded processing with integrated connectivity interfaces including I2C, IrDA, SPI, and UART/USART.

Key Parameters

Parameter	MSP432P401RIPZ
Manufacturer	Texas Instruments
Core Processor	ARM Cortex-M4F
Core Size	32-Bit Single-Core
Speed	48MHz
Program Memory Type	FLASH
Program Memory Size	256KB (256K x 8)
RAM Size	64K x 8
Voltage Supply (Vcc/Vdd)	1.62V ~ 3.7V
Data Converters	A/D 26x14b
Number of I/O	84
Package / Case	100-LQFP (14x14)
Operating Temperature	-40°C ~ 85°C (TA)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

The MSP430FR5994 series represents the manufacturer-recommended substitute platform for the obsolete MSP432P401RIPZ. Substitution is based on the following criteria:

Common Parameters:

Manufacturer: Texas Instruments
Program Memory Size: 256KB (256K x 8)
Connectivity: I2C, IrDA, SPI, UART/USART
Peripherals: DMA, POR, PWM, WDT
Operating Temperature: -40°C ~ 85°C (TA)
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 3 (168 Hours)
Voltage Supply Range: 1.8V ~ 3.6V (compatible with 1.62V ~ 3.7V)

Differentiation Factors:

Core Architecture: MSP430 CPUXV2 (16-Bit) vs. ARM Cortex-M4F (32-Bit)
Memory Type: FRAM vs. FLASH
Processing Speed: 16MHz vs. 48MHz
Package Options: 64-LQFP, 80-LQFP, 48-VQFN vs. 100-LQFP
I/O Count: 40–68 pins vs. 84 pins
RAM Size: 8K x 8 vs. 64K x 8
Data Converters: A/D 16x12b–20x12b vs. A/D 26x14b

Parameter Comparison

Parameter	MSP432P401RIPZ	MSP430FR5994IPM	MSP430FR5994IPN	MSP430FR5994IRGZT
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Core Processor	ARM Cortex-M4F	MSP430 CPUXV2	MSP430 CPUXV2	MSP430 CPUXV2
Core Size	32-Bit Single-Core	16-Bit	16-Bit	16-Bit
Speed	48MHz	16MHz	16MHz	16MHz
Program Memory Type	FLASH	FRAM	FRAM	FRAM
Program Memory Size	256KB (256K x 8)	256KB (256K x 8)	256KB (256K x 8)	256KB (256K x 8)
RAM Size	64K x 8	8K x 8	8K x 8	8K x 8
Voltage Supply (Vcc/Vdd)	1.62V ~ 3.7V	1.8V ~ 3.6V	1.8V ~ 3.6V	1.8V ~ 3.6V
Number of I/O	84	54	68	40
Package / Case	100-LQFP (14x14)	64-LQFP (10x10)	80-LQFP (12x12)	48-VQFN (7x7)
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Connectivity	I2C, IrDA, SPI, UART/USART	I2C, IrDA, SPI, UART/USART	I2C, IrDA, SPI, UART/USART	I2C, IrDA, SPI, UART/USART
Peripherals	DMA, POR, PWM, WDT	Brown-out Detect/Reset, DMA, POR, PWM, WDT	Brown-out Detect/Reset, DMA, POR, PWM, WDT	Brown-out Detect/Reset, DMA, POR, PWM, WDT
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

Product Status Consideration: The MSP432P401RIPZ is classified as obsolete. All three MSP430FR5994 variants are active products with ongoing manufacturer support and availability. Selection of substitute parts should prioritize active product status to ensure long-term supply chain viability and technical support.

Compliance and Certifications: All substitute parts maintain ROHS3 compliance and identical moisture sensitivity levels (MSL 3, 168 Hours) as the original part. Voltage supply ranges are compatible within the specified operating envelope. All parts share identical operating temperature ranges (-40°C ~ 85°C).

Package Selection Criteria:

MSP430FR5994IPM (64-LQFP, 10x10): Smallest footprint, 54 I/O pins
MSP430FR5994IPN (80-LQFP, 12x12): Mid-range footprint, 68 I/O pins, closest I/O count to original
MSP430FR5994IRGZT (48-VQFN, 7x7): Compact form factor, 40 I/O pins, tape & reel packaging

Memory Architecture: Substitute parts employ FRAM (Ferroelectric RAM) technology instead of FLASH. FRAM provides non-volatile storage with lower power consumption and extended write cycle endurance compared to FLASH memory.

Performance Trade-offs: The MSP430FR5994 series operates at 16MHz versus the MSP432P401RIPZ at 48MHz. RAM capacity is reduced from 64KB to 8KB. These architectural differences require design evaluation for applications with high processing speed or large working memory requirements.

Frequently Asked Questions (FAQ)

Q: Can MSP430FR5994 variants directly replace MSP432P401RIPZ in existing designs?

A: Direct replacement requires design evaluation. While all parts share 256KB program memory, identical connectivity interfaces, and compatible voltage ranges, the MSP430FR5994 series differs in core architecture (16-bit vs. 32-bit), processing speed (16MHz vs. 48MHz), RAM capacity (8KB vs. 64KB), and package pin counts (40–68 vs. 84). Firmware and PCB layout modifications may be necessary.

Q: Which MSP430FR5994 variant should be selected based on I/O requirements?

A: MSP430FR5994IPN (80-LQFP) provides 68 I/O pins, closest to the original 84-pin configuration. MSP430FR5994IPM (64-LQFP) offers 54 I/O pins with reduced footprint. MSP430FR5994IRGZT (48-VQFN) provides 40 I/O pins in the most compact package.

Q: What are the implications of FRAM versus FLASH memory?

A: FRAM technology provides non-volatile storage with superior write cycle endurance and lower power consumption. FRAM does not require erase cycles before writing, enabling faster data updates. Both technologies maintain 256KB capacity and identical operating temperature ranges.

Q: Are voltage supply ranges compatible between MSP432P401RIPZ and MSP430FR5994 variants?

A: The MSP432P401RIPZ operates at 1.62V–3.7V, while MSP430FR5994 variants operate at 1.8V–3.6V. The overlap range (1.8V–3.6V) is compatible. Applications requiring operation below 1.8V or above 3.6V require design modification.

Q: What packaging options are available for MSP430FR5994?

A: Three package options are available: 64-LQFP (10x10mm), 80-LQFP (12x12mm), and 48-VQFN (7x7mm with exposed pad). Package selection depends on PCB space constraints, I/O pin requirements, and thermal management needs.

Q: Do all substitute parts maintain identical compliance certifications?

A: All MSP430FR5994 variants maintain ROHS3 compliance, identical moisture sensitivity levels (MSL 3, 168 Hours), and equivalent REACH and ECCN classifications as the original MSP432P401RIPZ.

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