AT89LP4052-16PI Equivalent & Substitute Parts

Part Overview

The AT89LP4052-16PI is an 8051-based 8-bit microcontroller manufactured by Microchip Technology, featuring 4KB of FLASH program memory, 256 bytes of RAM, and a 16MHz clock speed. This device is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part is housed in a 20-PDIP package with through-hole mounting and operates across a wide supply voltage range of 2.4V to 5.5V.

Substiute Parts

AT89LP4052-16PI

Microchip TechnologyIn Stock: 897AT89LP4052-16PI Datasheet

Current PartRFQ

AT89LP4052-20PU

Microchip TechnologyIn Stock: 1000436AT89LP4052-20PU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT89LP4052-16PI is determined by strict adherence to the following electrical and mechanical parameters:

Core Compatibility Requirements:

• 8051 core processor architecture
• 8-bit core size
• 4KB FLASH program memory
• 256 x 8 RAM configuration
• 15 I/O pins
• SPI and UART/USART connectivity
• Brown-out Detect/Reset, POR, PWM, and WDT peripherals
• 2.4V to 5.5V supply voltage range
• -40°C to 85°C operating temperature range
• 20-DIP package with through-hole mounting

Allowable Variation:

• Clock speed may differ (16MHz or higher)
• Product status may transition from obsolete to active
• RoHS compliance status may improve
• Packaging format (tube vs. bulk) may vary
• Inventory availability may differ

The AT89LP4052-20PU meets all core compatibility requirements and serves as a direct substitute with enhanced specifications.

Parameter Comparison

Engineering Selection Recommendations

The AT89LP4052-20PU is a qualified substitute for the AT89LP4052-16PI based on the following factors:

Product Status: The AT89LP4052-16PI is classified as obsolete, while the AT89LP4052-20PU maintains active product status with significantly higher inventory availability (1,000,399 units versus 790 units). This ensures long-term supply chain reliability and production continuity.

Compliance Posture: The AT89LP4052-20PU achieves ROHS3 compliance, whereas the AT89LP4052-16PI is RoHS non-compliant. This compliance improvement aligns with current regulatory requirements and environmental standards.

Performance Enhancement: The AT89LP4052-20PU operates at 20MHz compared to the 16MHz of the original part. This higher clock speed provides improved performance while maintaining full backward compatibility with existing firmware and circuit designs, as all other electrical and mechanical parameters remain identical.

Electrical and Mechanical Compatibility: Both parts share identical core architecture, memory configuration, I/O count, peripheral set, supply voltage range, operating temperature range, and package specifications. Direct pin-for-pin substitution is supported without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the AT89LP4052-20PU be used as a direct replacement for the AT89LP4052-16PI?

A: Yes. The AT89LP4052-20PU is a direct pin-for-pin substitute. All electrical parameters, memory configuration, I/O specifications, and package dimensions are identical. The 20MHz clock speed of the substitute part is higher than the 16MHz original, which does not create compatibility issues in typical applications.

Q: What are the key differences between these two parts?

A: The primary differences are clock speed (16MHz vs. 20MHz), product status (obsolete vs. active), RoHS compliance (non-compliant vs. ROHS3 compliant), and inventory availability. All functional and electrical specifications remain unchanged.

Q: Is the higher clock speed of the AT89LP4052-20PU a concern for existing designs?

A: No. The higher clock speed of the substitute part does not create compatibility issues. Existing firmware and circuit designs will function correctly with the faster processor. The increased speed may improve application performance without requiring design modifications.

Q: Are there any package or mounting differences?

A: Both parts use identical 20-DIP (0.300", 7.62mm) packages with through-hole mounting. No PCB layout changes are required for substitution.

Q: What is the compliance status difference?

A: The AT89LP4052-16PI is RoHS non-compliant, while the AT89LP4052-20PU is ROHS3 compliant. The substitute part meets current environmental and regulatory standards.

Q: Why is the AT89LP4052-16PI classified as obsolete?

A: The AT89LP4052-16PI has been discontinued by the manufacturer. The AT89LP4052-20PU remains in active production and is the recommended part for new designs and ongoing production requirements.