AT29C040A-12PC Equivalent & Substitute Parts

Part Overview

The AT29C040A-12PC is a 4Mbit parallel FLASH memory IC manufactured by Microchip Technology, housed in a 32-DIP package with 120 ns access time. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations. The part operates within the 4.5V to 5.5V supply voltage range and supports through-hole mounting applications requiring non-volatile parallel memory storage.

Substiute Parts

AT29C040A-12PC

Microchip TechnologyIn Stock: 1996AT29C040A-12PC Datasheet

Current PartRFQ

SST39SF010A-70-4C-PHE

Microchip TechnologyIn Stock: 3608SST39SF010A-70-4C-PHE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT29C040A-12PC is determined by the following critical parameters:

• Package Compatibility: Both main and substitute parts must use 32-DIP (0.600", 15.24mm) through-hole packaging to ensure mechanical and electrical socket compatibility.
• Memory Interface: Parallel interface requirement is maintained across all substitute candidates.
• Voltage Supply Range: Operating voltage must remain within 4.5V to 5.5V to ensure compatibility with existing power distribution systems.
• Memory Type and Technology: Non-volatile FLASH memory technology is required for functional equivalence.
• Operating Temperature Range: The 0°C to 70°C operating range must be supported.

The SST39SF010A-70-4C-PHE meets these substitution criteria despite differences in memory capacity and access time specifications.

Parameter Comparison

Engineering Selection Recommendations

The SST39SF010A-70-4C-PHE serves as a functional substitute for the AT29C040A-12PC based on the following engineering criteria:

Product Status: The substitute part maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Compliance and Certifications: The SST39SF010A-70-4C-PHE is ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. The main part is RoHS non-compliant, making the substitute preferable for new designs and systems requiring compliance documentation.

Electrical Compatibility: Both parts operate within identical voltage supply ranges (4.5V to 5.5V) and support the same operating temperature window (0°C to 70°C), ensuring direct electrical compatibility in existing circuit designs.

Package and Mounting: Identical 32-DIP through-hole packaging ensures mechanical interchangeability without PCB redesign.

Performance Characteristics: The substitute part provides superior access time (70 ns versus 120 ns), delivering improved performance in timing-critical applications.

Frequently Asked Questions (FAQ)

Q: Can the SST39SF010A-70-4C-PHE directly replace the AT29C040A-12PC in existing designs?

A: Yes, the substitute part is mechanically and electrically compatible. Both parts use identical 32-DIP through-hole packaging, operate within the same voltage supply range (4.5V to 5.5V), and support the same operating temperature range (0°C to 70°C). The substitute part's superior access time (70 ns) provides performance improvement over the original specification (120 ns).

Q: What are the key differences between these parts?

A: The primary differences are memory capacity (4Mbit versus 1Mbit), access time (120 ns versus 70 ns), product status (obsolete versus active), and compliance certification (RoHS non-compliant versus ROHS3 compliant). The substitute part's faster access time and active production status make it suitable for modern applications.

Q: Are there any package compatibility concerns?

A: No. Both parts use identical 32-DIP (0.600", 15.24mm) through-hole packaging. No PCB modifications or socket changes are required for substitution.

Q: Does the substitute part require different supply voltage?

A: No. Both parts operate within the identical 4.5V to 5.5V supply voltage range, ensuring compatibility with existing power distribution circuits.

Q: What is the significance of the ROHS3 compliance on the substitute part?

A: ROHS3 compliance indicates the substitute part meets current regulatory requirements for hazardous substance restrictions. This is relevant for new designs, systems requiring compliance documentation, and applications subject to environmental regulations.