AT89C52-24PI Equivalent & Substitute Parts

Part Overview

The AT89C52-24PI is an 8-bit microcontroller based on the 8051 core architecture, manufactured by Microchip Technology. It features 8KB of FLASH program memory, 256 bytes of RAM, and operates at 24MHz with a supply voltage range of 4V to 6V. The device is packaged in a 40-pin DIP configuration suitable for through-hole mounting applications.

This part is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this microcontroller.

Substiute Parts

AT89C52-24PI

Microchip TechnologyIn Stock: 6414AT89C52-24PI Datasheet

Current PartRFQ

AT89S52-24PU

Microchip TechnologyIn Stock: 10945AT89S52-24PU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT89C52-24PI is determined by strict equivalence across the following critical parameters:

• Core Architecture: 8051-based processor
• Memory Configuration: 8KB FLASH program memory and 256 x 8 RAM
• Operating Frequency: 24MHz
• Supply Voltage Range: Compatibility within specified limits
• Package Type: 40-pin DIP through-hole configuration
• I/O Count: 32 I/O pins
• Operating Temperature Range: -40°C to 85°C

The AT89S52-24PU qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. The primary distinction between the main part and substitute lies in product status, programming capability verification, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The AT89S52-24PU is a direct functional equivalent to the AT89C52-24PI. Both devices share identical core architecture, memory configuration, speed rating, and physical packaging.

The AT89S52-24PU offers the following advantages:

• Active Product Status: Currently manufactured and supported by Microchip Technology, ensuring long-term availability and supply chain stability
• RoHS3 Compliance: Meets current environmental and regulatory requirements, whereas the AT89C52-24PI is non-compliant
• Verified Programmability: DiGi-Electronics has verified the programming capability of the AT89S52-24PU

The AT89S52-24PU operates within a narrower supply voltage range (4V ~ 5.5V) compared to the AT89C52-24PI (4V ~ 6V). Design circuits operating above 5.5V require voltage regulation or alternative component selection.

Frequently Asked Questions (FAQ)

Q: Can the AT89S52-24PU directly replace the AT89C52-24PI in existing designs?

A: Yes, provided the circuit design operates within the AT89S52-24PU supply voltage range of 4V to 5.5V. Both devices are pin-compatible 40-pin DIP packages with identical I/O configurations and memory specifications.

Q: What is the primary difference between the AT89C52-24PI and AT89S52-24PU?

A: The AT89C52-24PI is obsolete, while the AT89S52-24PU is an active product. The AT89S52-24PU is RoHS3 compliant and has verified programming capability. The AT89S52-24PU has a narrower supply voltage specification (4V ~ 5.5V versus 4V ~ 6V).

Q: Are there any package or pinout differences?

A: No. Both devices use identical 40-pin DIP packaging with 0.600" (15.24mm) body width and the same pinout configuration.

Q: What supply voltage should be used for the AT89S52-24PU?

A: The AT89S52-24PU operates within 4V to 5.5V. Designs requiring operation above 5.5V must incorporate voltage regulation or select an alternative component.

Q: Is the AT89S52-24PU suitable for new designs?

A: Yes. The AT89S52-24PU is an active product with current manufacturing support, RoHS3 compliance, and verified programmability, making it suitable for new development and production applications.