P87LPC762FD,512 Equivalent & Substitute Parts

Part Overview

The P87LPC762FD,512 is an 8051-based 8-bit microcontroller manufactured by NXP USA Inc., featuring 2KB OTP program memory, 128 x 8 bytes of RAM, and 18 I/O pins. Designed for embedded applications requiring low-power operation across a 2.7V to 6V supply range, this device integrates essential peripherals including UART/USART, I2C connectivity, brown-out detection, watchdog timer, and power-on reset functionality.

The P87LPC762FD,512 is classified as obsolete. Locating equivalent substitute parts is necessary to support legacy system maintenance, design updates, and production continuity where original components are no longer readily available or have reached end-of-life status.

Substiute Parts

P87LPC762FD,512

NXP USA Inc.In Stock: 1137P87LPC762FD,512 Datasheet

Current PartRFQ

W79E8213ASG

Nuvoton Technology CorporationIn Stock: 806W79E8213ASG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P87LPC762FD,512 is determined by the following critical parameters:

Core Architecture Compatibility: The substitute must use the 8051 core processor architecture to ensure firmware compatibility and instruction set alignment.

Package Compatibility: The substitute must use the 20-SOIC package with identical pinout and mechanical dimensions (0.295", 7.50mm Width) to enable direct board-level replacement without layout modifications.

I/O Pin Count: The substitute must provide a minimum of 18 I/O pins to maintain functional equivalence with the original design.

Operating Voltage Range: The substitute must operate within or encompass the 2.7V to 6V supply range of the original part.

Speed Rating: The substitute must support 20MHz operation to maintain timing-critical application requirements.

Memory Architecture: While program memory type and size may differ (OTP vs. FLASH), the substitute must provide sufficient program memory capacity and RAM (128 x 8 bytes minimum) for application code execution.

The W79E8213ASG meets these substitution criteria through identical core processor, package, I/O count, speed rating, and memory capacity specifications.

Parameter Comparison

Engineering Selection Recommendations

The W79E8213ASG is a direct substitute for the P87LPC762FD,512 based on the following engineering criteria:

Architectural Alignment: Both devices implement the 8051 core processor, ensuring instruction set compatibility and firmware portability without code modification.

Package and Pinout Equivalence: Identical 20-SOIC packaging and 18 I/O pin configuration enable direct board-level replacement without PCB layout changes.

Compliance and Certification: Both parts maintain ROHS3 compliance and EAR99 ECCN classification, satisfying regulatory requirements for equivalent component substitution.

Product Status Advantage: The W79E8213ASG is classified as active, providing long-term availability and supply chain continuity compared to the obsolete P87LPC762FD,512.

Memory Capacity Enhancement: The W79E8213ASG provides 4KB FLASH program memory compared to 2KB OTP in the original part, offering increased code capacity for application expansion. FLASH memory also enables in-system reprogramming, eliminating the one-time programming limitation of OTP.

Supply Voltage Consideration: The W79E8213ASG operates within a 2.4V to 5.5V range, which overlaps the original 2.7V to 6V specification. Applications requiring operation below 2.4V or above 5.5V require design review.

Moisture Sensitivity Improvement: The W79E8213ASG carries MSL 1 rating (unlimited shelf life) compared to MSL 3 (168 hours) for the original part, reducing handling and storage constraints.

Frequently Asked Questions (FAQ)

Q: Can the W79E8213ASG replace the P87LPC762FD,512 without PCB modifications?

A: Yes. Both devices use identical 20-SOIC packaging with matching pinout and 18 I/O pin configuration, enabling direct board-level substitution without layout changes.

Q: Are there firmware compatibility concerns when switching from P87LPC762FD,512 to W79E8213ASG?

A: No. Both devices implement the 8051 core processor architecture, ensuring instruction set compatibility. Existing firmware compiled for the P87LPC762FD,512 executes on the W79E8213ASG without modification. However, device-specific peripheral register implementations should be reviewed against datasheets for any application-dependent functionality.

Q: What is the primary difference between OTP and FLASH program memory?

A: OTP (One-Time Programmable) memory in the P87LPC762FD,512 allows a single programming cycle during manufacturing. FLASH memory in the W79E8213ASG supports multiple erase and reprogram cycles, enabling in-system updates and development flexibility. For production applications where code is finalized, both memory types provide equivalent functionality.

Q: Does the increased program memory in the W79E8213ASG (4KB vs. 2KB) create compatibility issues?

A: No. Increased memory capacity is backward compatible. Applications designed for 2KB memory operate without modification on the 4KB device. The additional memory capacity supports code expansion or enhanced functionality.

Q: Are there supply voltage range differences that affect circuit design?

A: The W79E8213ASG operates within 2.4V to 5.5V, while the P87LPC762FD,512 supports 2.7V to 6V. Applications operating below 2.4V or above 5.5V require design verification. Most standard 3.3V and 5V applications fall within both ranges and require no modification.

Q: What is the significance of the MSL rating difference?

A: MSL (Moisture Sensitivity Level) 3 for the P87LPC762FD,512 requires storage in controlled humidity (168-hour shelf life limit before baking). MSL 1 for the W79E8213ASG has unlimited shelf life, reducing storage and handling constraints and lowering total cost of ownership for inventory management.

Q: Is the W79E8213ASG available in production quantities?

A: Yes. The W79E8213ASG is classified as active product status with documented inventory availability, ensuring supply chain continuity compared to the obsolete P87LPC762FD,512.