AT89S52-24PC Equivalent & Substitute Parts

Part Overview

The AT89S52-24PC is an 8-bit microcontroller from Microchip Technology based on the 8051 core architecture. This device integrates 8KB of FLASH program memory, 256 bytes of RAM, and operates at 24MHz with a 40-pin DIP package. The AT89S52-24PC is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design requirements and production continuity.

Substiute Parts

AT89S52-24PC

Microchip TechnologyIn Stock: 2180AT89S52-24PC Datasheet

Current PartRFQ

AT89S52-24PU

Microchip TechnologyIn Stock: 10945AT89S52-24PU Datasheet

DirectRFQ

DS89C430-MNL+

Analog Devices Inc./Maxim IntegratedIn Stock: 1165DS89C430-MNL+ Datasheet

MFR RecommendedRFQ

DS89C450-MNL+

Analog Devices Inc./Maxim IntegratedIn Stock: 1779DS89C450-MNL+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT89S52-24PC is determined by compatibility across the following critical parameters: core processor architecture (8051), core size (8-Bit), package type (40-DIP), mounting method (Through Hole), I/O count (32), connectivity (UART/USART), and peripheral support (WDT). Substitute parts must maintain electrical compatibility within the specified voltage supply range and support the same fundamental microcontroller instruction set.

The substitute parts are grouped into two categories:

Direct Equivalent: AT89S52-24PU maintains identical electrical specifications, memory configuration, and operational characteristics as the main part, with the primary difference being packaging format (PDIP vs. DIP) and product status (Active vs. Obsolete).

Enhanced Substitutes: DS89C430-MNL+ and DS89C450-MNL+ are manufacturer-recommended alternatives from Analog Devices Inc./Maxim Integrated that provide increased program memory capacity (16KB and 64KB respectively), higher operating speed (33MHz), expanded RAM (1K x 8), and extended operating temperature range (-40°C ~ 85°C). These devices maintain 8051 core compatibility, 40-DIP package format, 32 I/O pins, and UART/USART connectivity.

Parameter Comparison

Engineering Selection Recommendations

AT89S52-24PU is the direct equivalent substitute for AT89S52-24PC. Both devices share identical electrical specifications, memory configuration, and operational parameters. The AT89S52-24PU is classified as Active product status with ROHS3 compliance, providing continuity for designs currently utilizing the AT89S52-24PC. This substitute is suitable for direct replacement in existing applications without design modification.

DS89C430-MNL+ and DS89C450-MNL+ are manufacturer-recommended alternatives that provide enhanced capabilities. These devices are suitable for applications requiring increased program memory capacity or higher processing speed. Both alternatives maintain 8051 core compatibility and 40-DIP package format, ensuring mechanical and electrical socket compatibility. The extended operating temperature range (-40°C ~ 85°C) and ROHS3 compliance support broader environmental and regulatory requirements compared to the obsolete AT89S52-24PC.

Selection between DS89C430-MNL+ and DS89C450-MNL+ depends on program memory requirements: DS89C430-MNL+ provides 16KB FLASH memory, while DS89C450-MNL+ provides 64KB FLASH memory. Both devices feature expanded RAM (1K x 8), external oscillator support, and Power-Fail Reset peripheral functionality.

Frequently Asked Questions (FAQ)

Q: Can AT89S52-24PU be used as a direct replacement for AT89S52-24PC?

A: Yes. AT89S52-24PU is a direct equivalent substitute. Both devices share identical core processor (8051), core size (8-Bit), speed (24MHz), program memory (8KB FLASH), RAM (256 x 8), I/O count (32), voltage supply range (4V ~ 5.5V), and 40-DIP package format. The primary difference is product status: AT89S52-24PU is Active while AT89S52-24PC is Obsolete.

Q: What are the key differences between AT89S52-24PU and DS89C430-MNL+?

A: AT89S52-24PU and DS89C430-MNL+ differ in program memory size (8KB vs. 16KB), operating speed (24MHz vs. 33MHz), RAM capacity (256 x 8 vs. 1K x 8), voltage supply range (4V ~ 5.5V vs. 4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C vs. -40°C ~ 85°C), oscillator type (Internal vs. External), and peripheral set (WDT vs. Power-Fail Reset and WDT). Both maintain 8051 core compatibility and 40-DIP package format.

Q: Are the DS89C430-MNL+ and DS89C450-MNL+ pin-compatible with AT89S52-24PC?

A: Yes. All three devices utilize the 40-DIP package format with identical pin count (40 pins) and Through Hole mounting type. Pin compatibility is maintained across the 8051 core instruction set and standard peripheral interfaces (UART/USART). Design verification is required to confirm functional compatibility with specific application requirements.

Q: What is the minimum voltage supply requirement for DS89C430-MNL+ and DS89C450-MNL+?

A: The minimum voltage supply for DS89C430-MNL+ and DS89C450-MNL+ is 4.5V, compared to 4V for AT89S52-24PC and AT89S52-24PU. Applications operating at voltages below 4.5V require design modification or selection of alternative components.

Q: Do all substitute parts support UART/USART connectivity?

A: Yes. AT89S52-24PU, DS89C430-MNL+, and DS89C450-MNL+ all support UART/USART connectivity. DS89C430-MNL+ and DS89C450-MNL+ provide additional connectivity options including EBI/EMI and SIO interfaces.

Q: What is the operating temperature range for each substitute part?

A: AT89S52-24PC operates from 0°C ~ 70°C. AT89S52-24PU operates from -40°C ~ 85°C. DS89C430-MNL+ and DS89C450-MNL+ both operate from -40°C ~ 85°C. Applications requiring operation below 0°C or above 70°C must utilize AT89S52-24PU, DS89C430-MNL+, or DS89C450-MNL+.

Q: Are all substitute parts RoHS compliant?

A: AT89S52-24PC is RoHS non-compliant. AT89S52-24PU, DS89C430-MNL+, and DS89C450-MNL+ are all ROHS3 compliant. Applications subject to RoHS regulatory requirements must utilize one of the compliant alternatives.