AT89LS8252-12AI Equivalent & Substitute Parts Reference

Part Overview

The AT89LS8252-12AI is an 8-bit microcontroller IC from Microchip Technology, based on the 8051 core, with 8KB Flash program memory, 44-TQFP package, and a supply voltage range of 2.7V to 6V. This model is classified as obsolete, necessitating the identification of alternative models for ongoing projects or replacement purposes. Selecting substitute parts based on strictly matching electrical, mechanical, and package parameters is required for direct interchangeability.

Key Parameters

Parameter	AT89LS8252-12AI Value
Manufacturer	Microchip Technology
Core Processor	8051
Core Size	8-Bit
Speed	12MHz
Program Memory Size	8KB (8K x 8)
Program Memory Type	FLASH
EEPROM Size	2K x 8
RAM Size	256 x 8
Number of I/O	32
Voltage - Supply (Vcc/Vdd)	2.7V ~ 6V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	44-TQFP
Mounting Type	Surface Mount
Series	89LS
RoHS Status	RoHS non-compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution logic is strictly based on matching the following parameters: core processor type, core size, program memory type and size, EEPROM and RAM capacity, I/O count, package case and mounting type, operating temperature range, and supply voltage range. All substitute parts listed must share these key parameters to ensure interchangeable use within embedded system designs.

Parameter Comparison

Parameter	AT89LS8252-12AI	AT89S8253-24AU
Manufacturer	Microchip Technology	Microchip Technology
Core Processor	8051	8051
Core Size	8-Bit	8-Bit
Speed	12MHz	24MHz
Program Memory Size	8KB (8K x 8)	12KB (12K x 8)
Program Memory Type	FLASH	FLASH
EEPROM Size	2K x 8	2K x 8
RAM Size	256 x 8	256 x 8
Number of I/O	32	32
Voltage - Supply (Vcc/Vdd)	2.7V ~ 6V	2.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	44-TQFP	44-TQFP
Mounting Type	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Product Status	Obsolete	Active

Engineering Selection Recommendations

Selection between AT89LS8252-12AI and AT89S8253-24AU may be based strictly on product status and compliance. The AT89LS8252-12AI is obsolete and RoHS non-compliant. The AT89S8253-24AU is active and ROHS3 compliant. For applications requiring ongoing availability and environmental compliance, AT89S8253-24AU should be selected.

Frequently Asked Questions (FAQ)

Q1: What are the critical parameters to verify when selecting a substitute for AT89LS8252-12AI?
A1: Core processor type, program memory size and type, EEPROM and RAM capacity, I/O count, package/case, mounting type, voltage range, and operating temperature must match to ensure compatibility.

Q2: Is the 44-TQFP package important for direct substitution?
A2: Yes, substituting within the same package (44-TQFP) ensures mechanical compatibility for surface mount assembly.

Q3: Does the substitute part AT89S8253-24AU meet RoHS environmental compliance requirements?
A3: AT89S8253-24AU is ROHS3 compliant, whereas AT89LS8252-12AI is RoHS non-compliant.

Q4: Are the electrical characteristics and I/O functions equivalent between these parts?
A4: Both parts feature 8051 core, 8-Bit architecture, similar EEPROM and RAM sizes, and the same I/O pin count, confirming electrical and functional equivalency per provided parameters.

Q5: What is the significance of product status in substitute selection?
A5: AT89LS8252-12AI is obsolete, requiring selection of active parts such as AT89S8253-24AU to ensure ongoing supply and support.

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