MSP430F6731IPZ Equivalent & Substitute Parts

Part Overview

The MSP430F6731IPZ is a 16-bit microcontroller from Texas Instruments' MSP430F6xx series, featuring a MSP430 CPUXV2 core operating at 25MHz with 32KB FLASH program memory. The device integrates 72 I/O pins, multiple communication interfaces (I2C, SPI, UART/USART, IrDA, LINbus, SCI), and analog capabilities including 8-channel 10-bit and 3-channel 24-bit data converters. The MSP430F6731IPZ is classified as obsolete, necessitating identification of functionally compatible alternatives for new designs and ongoing production requirements.

Substiute Parts

MSP430F6731IPZ

Texas InstrumentsIn Stock: 3331MSP430F6731IPZ Datasheet

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MSP430F6733AIPZ

Texas InstrumentsIn Stock: 910MSP430F6733AIPZ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MSP430F6731IPZ is determined by strict equivalence across the following critical parameters:

• Processor Architecture: MSP430 CPUXV2 core (identical instruction set and peripheral compatibility)
• Package Form Factor: 100-LQFP (14x14) surface mount (identical PCB footprint and pin assignment)
• Core Speed: 25MHz (identical clock frequency)
• I/O Count: 72 pins (identical port configuration)
• Voltage Supply Range: 1.8V ~ 3.6V (identical operating voltage)
• Operating Temperature Range: -40°C ~ 85°C (identical thermal specification)
• Connectivity Interfaces: I2C, IrDA, LINbus, SCI, SPI, UART/USART (identical peripheral set)
• Data Converter Configuration: A/D 8x10b, 3x24b (identical analog capability)

The MSP430F6733AIPZ qualifies as a direct substitute based on full alignment with these parameters. The primary difference is an increase in program memory capacity (64KB versus 32KB) and corresponding RAM expansion (4K x 8 versus 2K x 8), which represents a functional upgrade rather than a deviation from substitution criteria.

Parameter Comparison

Engineering Selection Recommendations

The MSP430F6733AIPZ is the qualified substitute for the obsolete MSP430F6731IPZ. Selection is based on the following engineering criteria:

Compliance and Certification: Both devices maintain ROHS3 compliance, REACH unaffected status, and identical EAR99 export classification (HTSUS 8542.31.0001), ensuring regulatory equivalence for procurement and deployment.

Product Status: The MSP430F6733AIPZ carries active product status from Texas Instruments, providing assured long-term availability and manufacturing support. The MSP430F6731IPZ obsolete classification eliminates it from new procurement cycles.

Functional Equivalence: Identical processor architecture, clock frequency, I/O configuration, peripheral set, voltage specifications, and thermal operating range ensure direct pin-for-pin and software-level compatibility without design modification.

Memory Enhancement: The increased program memory (64KB versus 32KB) and RAM capacity (4K x 8 versus 2K x 8) provide expanded application capability without introducing incompatibility. Existing firmware compiled for the MSP430F6731IPZ executes without modification on the MSP430F6733AIPZ.

Packaging Equivalence: Identical 100-LQFP (14x14) surface mount package ensures PCB footprint compatibility and eliminates layout redesign requirements.

Frequently Asked Questions (FAQ)

Q: Can the MSP430F6733AIPZ directly replace the MSP430F6731IPZ on existing PCBs?

A: Yes. The MSP430F6733AIPZ is pin-for-pin compatible with the MSP430F6731IPZ. Both devices use the 100-LQFP (14x14) package with identical pin assignments, voltage specifications, and I/O configuration. No PCB layout modifications are required.

Q: Are there firmware compatibility concerns when migrating from MSP430F6731IPZ to MSP430F6733AIPZ?

A: No. Both devices implement the identical MSP430 CPUXV2 processor architecture and instruction set. Firmware compiled for the MSP430F6731IPZ executes without modification on the MSP430F6733AIPZ. The increased memory capacity of the substitute part does not introduce incompatibility.

Q: What is the primary difference between these two devices?

A: The MSP430F6733AIPZ provides doubled program memory (64KB FLASH versus 32KB FLASH) and doubled RAM capacity (4K x 8 versus 2K x 8). All other specifications—processor core, clock speed, I/O count, peripheral set, package, voltage range, and operating temperature—remain identical.

Q: Why is the MSP430F6731IPZ classified as obsolete?

A: The MSP430F6731IPZ has reached end-of-life status within Texas Instruments' product portfolio. The MSP430F6733AIPZ represents the active successor within the MSP430F6xx series, offering equivalent functionality with enhanced memory resources.

Q: Are there compliance or certification differences between these devices?

A: No. Both devices maintain ROHS3 compliance, REACH unaffected status, and identical export classification (EAR99). Regulatory and environmental certifications are equivalent.

Q: What packaging options are available for the MSP430F6733AIPZ?

A: The MSP430F6733AIPZ is supplied in a Tray packaging format. The MSP430F6731IPZ was supplied without specified packaging designation. Both devices use the identical 100-LQFP (14x14) component form factor.

Q: Are there any design considerations when transitioning to the MSP430F6733AIPZ?

A: No design modifications are required. The substitute part maintains identical electrical specifications, thermal operating range (-40°C ~ 85°C), supply voltage range (1.8V ~ 3.6V), and peripheral interface configuration. Existing schematics and PCB layouts require no revision.