AT89S53-24PC Equivalent & Substitute Parts

Part Overview

The AT89S53-24PC is an 8-bit microcontroller from Microchip Technology's 89S series, based on the 8051 core architecture. This device features 12KB of FLASH program memory, operates at 24MHz, and is housed in a 40-pin DIP package. The AT89S53-24PC is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

AT89S53-24PC

Microchip TechnologyIn Stock: 2011AT89S53-24PC Datasheet

Current PartRFQ

AT89S52-24PU

Microchip TechnologyIn Stock: 10945AT89S52-24PU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT89S53-24PC is determined by the following critical parameters:

• Core Architecture: 8051-based processor
• Operating Speed: 24MHz clock frequency
• Package Type: 40-pin DIP form factor
• I/O Count: 32 I/O pins
• RAM Configuration: 256 x 8 bytes
• Supply Voltage Range: Compatible operating voltage window
• Mounting Technology: Through-hole assembly

The AT89S52-24PU qualifies as a substitute based on matching core architecture, speed, package, I/O count, and RAM configuration. The primary difference is reduced program memory (8KB versus 12KB), which represents a functional limitation rather than an incompatibility. This substitution is valid when application firmware requirements do not exceed 8KB FLASH capacity.

Parameter Comparison

Engineering Selection Recommendations

The AT89S52-24PU is an active product with ROHS3 compliance, whereas the AT89S53-24PC is obsolete and RoHS non-compliant. Selection of the AT89S52-24PU is appropriate for applications where program memory requirements do not exceed 8KB. The substitute device offers an extended operating temperature range (-40°C to 85°C versus 0°C to 70°C) and a narrower supply voltage window (4V to 5.5V versus 4V to 6V). Pin-to-pin compatibility and identical I/O configuration ensure direct socket substitution without PCB modification.

Frequently Asked Questions (FAQ)

Q: Can the AT89S52-24PU directly replace the AT89S53-24PC in existing designs?

A: Yes, direct socket replacement is possible due to identical 40-pin DIP packaging and pin configuration. However, firmware must fit within the 8KB program memory limit of the AT89S52-24PU.

Q: What is the primary functional difference between these devices?

A: The AT89S53-24PC provides 12KB of FLASH program memory, while the AT89S52-24PU provides 8KB. Both devices share identical core architecture, speed, I/O count, and RAM configuration.

Q: Are there supply voltage compatibility concerns?

A: The AT89S52-24PU operates within 4V to 5.5V, while the AT89S53-24PC operates within 4V to 6V. Designs operating above 5.5V require the original part or alternative solutions.

Q: Does the extended temperature range of the AT89S52-24PU affect substitution suitability?

A: The AT89S52-24PU's extended range (-40°C to 85°C) is a superset of the AT89S53-24PC's range (0°C to 70°C). This represents improved capability and does not restrict substitution for applications within the original temperature specification.

Q: What compliance advantage does the AT89S52-24PU offer?

A: The AT89S52-24PU is ROHS3 compliant and an active product, whereas the AT89S53-24PC is obsolete and RoHS non-compliant. New designs should prioritize the AT89S52-24PU for regulatory compliance and long-term availability.