AT89LP4052-16XU Equivalent & Substitute Parts

Part Overview

The AT89LP4052-16XU is an 8051-based 8-bit microcontroller manufactured by Microchip Technology, featuring 4KB of FLASH program memory, 256 bytes of RAM, and a 16MHz operating frequency. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part is housed in a 20-TSSOP surface mount package and operates across a supply voltage range of 2.4V to 5.5V with an operating temperature range of -40°C to 85°C.

Substiute Parts

AT89LP4052-16XU

Microchip TechnologyIn Stock: 3937AT89LP4052-16XU Datasheet

Current PartRFQ

AT89LP4052-20XU

Microchip TechnologyIn Stock: 1422AT89LP4052-20XU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT89LP4052-16XU is determined by strict equivalence across the following critical parameters:

• Core processor architecture (8051)
• Core size (8-Bit)
• Program memory capacity (4KB FLASH)
• RAM capacity (256 x 8)
• Package type (20-TSSOP)
• Supply voltage range (2.4V ~ 5.5V)
• Operating temperature range (-40°C ~ 85°C)
• I/O count (15)
• Connectivity interfaces (SPI, UART/USART)
• Peripheral feature set (Brown-out Detect/Reset, POR, PWM, WDT)

The AT89LP4052-20XU qualifies as a direct substitute based on identical values across all these parameters. The primary difference is the operating speed specification, which does not disqualify substitution when the application requirement does not mandate the 16MHz frequency ceiling.

Parameter Comparison

Engineering Selection Recommendations

The AT89LP4052-20XU is the qualified substitute for the AT89LP4052-16XU. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The substitute part carries active product status, providing superior long-term availability and supply chain stability compared to the obsolete main part. Both devices are manufactured by Microchip Technology and share identical core architecture, memory configuration, and peripheral feature sets. The 20MHz speed rating of the substitute part exceeds the 16MHz specification of the main part, providing operational headroom for applications designed to the 16MHz ceiling. Substitution is valid for all applications where the 16MHz frequency requirement is not a hard constraint.

Frequently Asked Questions (FAQ)

Q: Can the AT89LP4052-20XU directly replace the AT89LP4052-16XU in existing designs?

A: Yes, the AT89LP4052-20XU is a direct substitute. Both parts share identical core processor architecture, memory capacity, I/O count, peripheral feature set, supply voltage range, and operating temperature range. The substitute part operates at 20MHz versus 16MHz, which does not prevent substitution in applications designed for the 16MHz part.

Q: What is the primary reason for substitution?

A: The AT89LP4052-16XU is classified as obsolete. The AT89LP4052-20XU maintains active product status, ensuring continued availability and manufacturing support.

Q: Are there package differences between these parts?

A: No. Both the AT89LP4052-16XU and AT89LP4052-20XU use the 20-TSSOP package with identical physical dimensions (0.173" width, 4.40mm).

Q: Do compliance certifications differ between the parts?

A: No. Both parts are ROHS3 compliant and REACH unaffected, maintaining identical regulatory status.

Q: What is the significance of the speed difference?

A: The AT89LP4052-20XU operates at 20MHz compared to the 16MHz of the main part. This higher speed rating does not create incompatibility; it provides additional operational margin. Applications designed for 16MHz operation will function correctly with the 20MHz substitute part.

Q: Are there any memory or I/O differences?

A: No. Both parts feature 4KB FLASH program memory, 256 x 8 RAM, 15 I/O pins, and identical peripheral configurations including SPI, UART/USART, Brown-out Detect/Reset, POR, PWM, and WDT.