LC87F5N62BU-QIP-E Equivalent & Substitute Parts

Part Overview

The LC87F5N62BU-QIP-E is an 8-bit microcontroller manufactured by onsemi, featuring 66KB FLASH program memory, 2KB RAM, and 88 I/O pins in a 100-PQFP surface mount package. This device operates at 12MHz with an internal oscillator and supports SIO and UART/USART connectivity alongside PWM and watchdog timer peripherals. The part is classified as "Not For New Designs," indicating its mature lifecycle status. Identifying equivalent substitute parts becomes necessary when inventory constraints occur or when design requirements necessitate enhanced memory configurations within the same architectural family.

Substiute Parts

LC87F5N62BU-QIP-E

onsemiIn Stock: 892LC87F5N62BU-QIP-E Datasheet

Current PartRFQ

LC87F5WC8AVU-QIP-H

onsemiIn Stock: 1570LC87F5WC8AVU-QIP-H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LC87F5N62BU-QIP-E is determined by strict alignment across the following critical parameters:

• Manufacturer & Base Product Family: Both parts must originate from onsemi and share the LC87F base product number to ensure architectural compatibility and instruction set alignment.
• Core Architecture: 8-bit core size is mandatory for functional equivalence.
• Operating Frequency: 12MHz clock speed must be maintained to preserve timing-dependent application behavior.
• Package & Pin Configuration: 100-BQFP (100-PQFP 14x20) package with 88 I/O pins ensures mechanical and electrical compatibility with existing PCB layouts.
• Voltage Supply Range: 2.2V ~ 5.5V supply compatibility is required for power distribution circuit compatibility.
• Connectivity & Peripherals: SIO, UART/USART, PWM, and WDT must be present to maintain functional feature parity.
• Data Converter Specification: A/D 15x8b configuration must be preserved.
• Compliance Standards: RoHS3 compliance and MSL 3 rating must be maintained.

The LC87F5WC8AVU-QIP-H qualifies as a substitute part. While it features increased program memory (128KB versus 66KB) and expanded RAM (4K x 8 versus 2K x 8), all critical parameters remain aligned, making it functionally compatible for applications requiring equivalent or greater memory capacity.

Parameter Comparison

Engineering Selection Recommendations

The LC87F5WC8AVU-QIP-H serves as a direct substitute for the LC87F5N62BU-QIP-E based on architectural and compliance alignment. Both devices maintain identical core specifications, pin configurations, and electrical operating parameters. The substitute part provides enhanced memory capacity—128KB FLASH and 4KB RAM compared to 66KB FLASH and 2KB RAM—which accommodates applications requiring larger code or data storage within the same physical footprint and power envelope.

Both parts carry identical RoHS3 compliance and MSL 3 ratings, ensuring equivalent environmental and manufacturing process compatibility. The substitute part's "Obsolete" status should be evaluated against application lifecycle requirements and long-term supply chain planning.

Frequently Asked Questions (FAQ)

Q: Can the LC87F5WC8AVU-QIP-H replace the LC87F5N62BU-QIP-E in existing designs?

A: Yes. Both parts share identical pin configurations (100-BQFP, 88 I/O), voltage supply ranges (2.2V ~ 5.5V), operating frequencies (12MHz), and peripheral sets (SIO, UART/USART, PWM, WDT). The substitute part's increased memory capacity does not introduce incompatibility. Existing PCB layouts and power distribution circuits require no modification.

Q: What are the memory differences between these parts?

A: The main part provides 66KB FLASH and 2KB RAM. The substitute part provides 128KB FLASH and 4KB RAM. Applications utilizing less than 66KB code space and 2KB data space will function identically on either device. Applications requiring greater memory capacity benefit from the substitute part's enhanced specifications.

Q: Are both parts RoHS compliant?

A: Yes. Both the LC87F5N62BU-QIP-E and LC87F5WC8AVU-QIP-H are ROHS3 compliant with MSL 3 ratings (168 hours), ensuring equivalent environmental and manufacturing process compatibility.

Q: What is the significance of the product status difference?

A: The main part is classified as "Not For New Designs," indicating a mature product lifecycle. The substitute part is classified as "Obsolete," indicating end-of-life status. Both statuses reflect mature product lifecycles. Supply availability and long-term sourcing should be evaluated based on application requirements and production volume.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 100-BQFP package (100-PQFP 14x20 mm), ensuring identical PCB footprints and mechanical compatibility.