MC68331CFC16 Equivalent & Substitute Parts

Part Overview

The MC68331CFC16 is a 32-bit single-core microcontroller from NXP Semiconductors, based on the CPU32 architecture operating at 16MHz. This ROMless embedded controller features EBI/EMI, SCI, SPI, and UART/USART connectivity with integrated peripherals including power-on reset (POR), pulse-width modulation (PWM), and watchdog timer (WDT) functionality. The device is housed in a 132-PQFP surface-mount package with 18 I/O pins and operates across the industrial temperature range of -40°C to 85°C.

The MC68331CFC16 is classified as obsolete. Locating direct replacements becomes necessary for legacy system maintenance, board repairs, and production support where original inventory is depleted or unavailable.

Substiute Parts

MC68331CFC16

NXP SemiconductorsIn Stock: 2985MC68331CFC16 Datasheet

Current PartRFQ

MC68331CEH16

NXP USA Inc.In Stock: 4135MC68331CEH16 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MC68331CFC16 is determined by strict equivalence across the following critical parameters:

• Core Architecture: CPU32 processor
• Memory Configuration: ROMless design
• Clock Speed: 16MHz operation
• Electrical Specifications: 4.5V to 5.5V supply voltage range
• Interface Connectivity: EBI/EMI, SCI, SPI, UART/USART support
• Integrated Peripherals: POR, PWM, WDT functionality
• I/O Count: 18 pins
• Temperature Range: -40°C to 85°C
• Package Form Factor: 132-PQFP (24.13x24.13) surface-mount configuration

The MC68331CEH16 qualifies as a direct substitute based on complete alignment across all specified electrical, functional, and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The MC68331CEH16 is the qualified substitute for the MC68331CFC16. Both devices share identical functional specifications, electrical characteristics, and physical packaging. The primary distinction lies in product lifecycle status and regulatory compliance:

The MC68331CFC16 carries obsolete status with RoHS non-compliant classification. The MC68331CEH16, while designated as "Not For New Designs," achieves ROHS3 compliance, making it suitable for legacy system maintenance and repair applications where regulatory requirements apply.

Selection between these parts should be based on inventory availability, packaging format (the MC68331CFC16 is supplied in standard packaging while the MC68331CEH16 is supplied in trays), and compliance requirements specific to the application environment.

Frequently Asked Questions (FAQ)

Q: Are the MC68331CFC16 and MC68331CEH16 pin-compatible?

A: Yes. Both devices utilize the identical 132-PQFP package with 24.13mm dimensions and 18 I/O pins in the same configuration. Direct socket substitution is supported without PCB modification.

Q: Can the MC68331CEH16 replace the MC68331CFC16 in existing designs?

A: Yes. The MC68331CEH16 provides complete functional equivalence across all specified parameters: CPU32 architecture, 16MHz clock speed, ROMless memory configuration, 4.5V to 5.5V supply voltage, and identical peripheral set (POR, PWM, WDT). No firmware or hardware redesign is required.

Q: What is the difference between the packaging formats?

A: The MC68331CFC16 is supplied in standard packaging, while the MC68331CEH16 is supplied in trays. Both formats contain identical devices; the difference is in the shipping and storage container only.

Q: Why does the MC68331CEH16 have ROHS3 compliance while the MC68331CFC16 does not?

A: RoHS compliance status reflects the manufacturing date and process used. The MC68331CEH16 was manufactured under processes meeting ROHS3 standards, while the MC68331CFC16 predates these requirements. Both devices are functionally identical.

Q: Are there any electrical performance differences between these parts?

A: No. Both devices operate at 16MHz, support the same 4.5V to 5.5V supply voltage range, and provide identical connectivity (EBI/EMI, SCI, SPI, UART/USART) and peripheral functionality. Electrical performance is equivalent.

Q: What is the moisture sensitivity level, and does it affect storage?

A: Both devices carry MSL 3 rating with a 168-hour floor life. Components must be stored in controlled humidity environments and baked according to IPC standards before reflow soldering if the floor life is exceeded.