AT89LS52-16JI Equivalent & Substitute Parts

Part Overview

The AT89LS52-16JI is an 8051-based 8-bit microcontroller manufactured by Microchip Technology, featuring 8KB FLASH program memory, 256 bytes of RAM, and 32 I/O pins operating at 16MHz. The device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and production requirements. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct replacement capability.

Substiute Parts

AT89LS52-16JI

Microchip TechnologyIn Stock: 5617AT89LS52-16JI Datasheet

Current PartRFQ

AT89LS52-16JU

Microchip TechnologyIn Stock: 2697AT89LS52-16JU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT89LS52-16JI is determined by strict equivalence across the following critical parameters:

• Core processor architecture (8051)
• Core size (8-Bit)
• Operating frequency (16MHz)
• Program memory capacity and type (8KB FLASH)
• RAM capacity (256 x 8)
• I/O pin count (32)
• Supply voltage range (2.7V ~ 4V)
• Operating temperature range (-40°C ~ 85°C)
• Package type and pin configuration (44-LCC J-Lead)
• Connectivity interface (UART/USART)
• Peripheral features (WDT)

The AT89LS52-16JU meets all substitution criteria, differing only in packaging format (tube versus unspecified) and product status (active versus obsolete).

Parameter Comparison

Engineering Selection Recommendations

The AT89LS52-16JU is a direct functional equivalent to the AT89LS52-16JI. Both devices share identical electrical and mechanical specifications across all critical parameters. The primary distinction is product lifecycle status: the AT89LS52-16JI is obsolete, while the AT89LS52-16JU maintains active production status.

For new designs or production continuity, the AT89LS52-16JU is the appropriate selection. This part is ROHS3 compliant, whereas the AT89LS52-16JI is RoHS non-compliant. Both devices carry REACH Unaffected and EAR99 ECCN classifications. The AT89LS52-16JU is verified as programmable through DiGi-Electronics, providing additional assurance for development and production workflows.

Frequently Asked Questions (FAQ)

Q: Can the AT89LS52-16JU replace the AT89LS52-16JI in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all functional parameters. Pin configuration, memory architecture, I/O count, voltage requirements, and operating temperature range are equivalent. Direct substitution is supported without circuit modification.

Q: What is the difference between the AT89LS52-16JI and AT89LS52-16JU?

A: The parts differ in product status and packaging format. The AT89LS52-16JI is obsolete and RoHS non-compliant. The AT89LS52-16JU is in active production and ROHS3 compliant. Both maintain identical core functionality and pin compatibility.

Q: Are there any compatibility concerns with the 44-LCC J-Lead package?

A: No. Both parts use the 44-LCC (J-Lead) surface mount package with identical dimensions (16.6x16.6mm). PCB footprints and assembly processes are interchangeable.

Q: Does the AT89LS52-16JU support the same voltage and temperature ranges?

A: Yes. Both devices operate at 2.7V to 4V supply voltage and function across the -40°C to 85°C temperature range. Environmental specifications are identical.

Q: Is the AT89LS52-16JU programmable through standard development tools?

A: The AT89LS52-16JU is verified as programmable through DiGi-Electronics. Confirm tool compatibility with your specific development environment.