AT89LS52-16PI Equivalent & Substitute Parts

Part Overview

The AT89LS52-16PI is an 8-bit microcontroller based on the 8051 core architecture, manufactured by Microchip Technology. This device integrates 8KB of FLASH program memory, 256 bytes of RAM, and 32 I/O pins, operating at 16MHz with a supply voltage range of 2.7V to 4V. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

AT89LS52-16PI

Microchip TechnologyIn Stock: 1033AT89LS52-16PI Datasheet

Current PartRFQ

AT89LS52-16PU

AtmelIn Stock: 1288AT89LS52-16PU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT89LS52-16PI is determined by strict equivalence across the following critical parameters:

• Core Architecture: 8051-based processor
• Memory Configuration: 8KB FLASH program memory, 256 bytes RAM
• Operating Frequency: 16MHz
• I/O Count: 32 pins
• Supply Voltage Range: 2.7V ~ 4V
• Package Type: 40-DIP through-hole
• Connectivity & Peripherals: UART/USART and WDT functionality

The AT89LS52-16PU qualifies as a direct substitute based on identical electrical specifications and package compatibility. The primary distinction is the packaging variant (PDIP vs. DIP) and product status transition from obsolete to active.

Parameter Comparison

Engineering Selection Recommendations

The AT89LS52-16PU is the qualified substitute for the AT89LS52-16PI. Selection is based on the following engineering criteria:

• Electrical Equivalence: All functional parameters, memory configuration, and operating specifications are identical.
• Package Compatibility: Both devices use 40-DIP through-hole packaging with identical pin assignments and mechanical dimensions.
• Product Status: The AT89LS52-16PU maintains active product status, ensuring continued availability and manufacturing support, whereas the AT89LS52-16PI is obsolete.
• Compliance & Certifications: Both parts share identical ECCN (EAR99) and HTSUS (8542.31.0001) classifications.

For new designs or ongoing production requiring the AT89LS52-16PI, the AT89LS52-16PU is the direct replacement without circuit modification or firmware changes.

Frequently Asked Questions (FAQ)

Q: Can the AT89LS52-16PU be used as a direct replacement for the AT89LS52-16PI without PCB modifications?

A: Yes. Both devices are pin-compatible with identical 40-DIP package dimensions (0.600", 15.24mm). No PCB layout changes are required.

Q: Are the electrical specifications identical between these two parts?

A: Yes. Both parts share identical core processor architecture (8051), clock speed (16MHz), memory configuration (8KB FLASH, 256 bytes RAM), I/O count (32 pins), supply voltage range (2.7V ~ 4V), and operating temperature range (-40°C ~ 85°C).

Q: What is the primary difference between AT89LS52-16PI and AT89LS52-16PU?

A: The AT89LS52-16PI is classified as obsolete, while the AT89LS52-16PU maintains active product status. The manufacturer differs (Microchip Technology vs. Atmel), but electrical and mechanical specifications are equivalent.

Q: Are there any compliance or certification differences?

A: No. Both parts share identical ECCN and HTSUS classifications. RoHS and REACH status information should be verified with the current manufacturer datasheet.

Q: Can firmware developed for the AT89LS52-16PI run on the AT89LS52-16PU without modification?

A: Yes. Identical core processor architecture and memory configuration ensure firmware compatibility without changes.