AT27C010-12JC EPROM Equivalent & Substitute Parts

Part Overview

The AT27C010-12JC is a 1Mbit parallel EPROM (Erasable Programmable Read-Only Memory) manufactured by Microchip Technology in a 32-PLCC package. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and component procurement. The AT27C010-12JC operates with a 120 ns access time and is designed for applications requiring non-volatile memory storage with parallel interface architecture.

Substiute Parts

AT27C010-12JC

Microchip TechnologyIn Stock: 15086AT27C010-12JC Datasheet

Current PartRFQ

AT27C010-70JU

Microchip TechnologyIn Stock: 2331AT27C010-70JU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT27C010-12JC is determined by strict adherence to the following electrical and mechanical parameters:

Critical Compatibility Parameters:

• Memory capacity: 1Mbit (128K x 8 organization)
• Memory interface: Parallel
• Package type: 32-PLCC (13.97x11.43mm)
• Voltage supply range: 4.5V ~ 5.5V
• Mounting type: Surface Mount

Performance Variation Allowed:

• Access time: Faster or equal to 120 ns (backward compatible)
• Operating temperature range: Extended ranges are acceptable
• Product status: Active or Obsolete

The AT27C010-70JU qualifies as a direct substitute based on identical memory capacity, organization, interface, package, and voltage specifications. The faster 70 ns access time represents an improvement over the original 120 ns specification, ensuring functional compatibility in all applications designed for the AT27C010-12JC.

Parameter Comparison

Engineering Selection Recommendations

The AT27C010-70JU is the qualified substitute for the AT27C010-12JC based on the following factors:

Electrical Compatibility: Both devices operate within identical voltage supply ranges (4.5V ~ 5.5V) and maintain the same memory capacity, organization, and parallel interface architecture. The faster access time of the AT27C010-70JU (70 ns versus 120 ns) ensures backward compatibility with all timing-critical applications.

Mechanical Compatibility: Both devices utilize the 32-PLCC package with identical physical dimensions (13.97 x 11.43mm) and surface mount configuration, enabling direct PCB-level substitution without layout modifications.

Product Status and Compliance: The AT27C010-70JU carries Active product status, ensuring ongoing availability and manufacturer support. The device achieves ROHS3 compliance, meeting current environmental and regulatory requirements, whereas the original AT27C010-12JC is RoHS non-compliant.

Operational Range: The AT27C010-70JU supports an extended operating temperature range (-40°C ~ 85°C) compared to the original specification (0°C ~ 70°C), providing enhanced thermal margin for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can the AT27C010-70JU directly replace the AT27C010-12JC without PCB modifications?

A: Yes. Both devices share identical package geometry (32-PLCC), pinout, voltage requirements, and memory organization. Direct substitution is possible at the component level without circuit board redesign.

Q: What is the significance of the faster 70 ns access time in the substitute part?

A: The AT27C010-70JU's 70 ns access time is faster than the original 120 ns specification. This represents an improvement that maintains backward compatibility—any system designed for 120 ns access will function correctly with the faster device.

Q: Does the extended operating temperature range of the AT27C010-70JU affect compatibility?

A: No. The extended range (-40°C ~ 85°C) is a superset of the original specification (0°C ~ 70°C). Systems operating within the original temperature window will function identically with the substitute part.

Q: Why is RoHS compliance important for this substitution?

A: The AT27C010-70JU achieves ROHS3 compliance, meeting current environmental regulations and supply chain requirements. The original AT27C010-12JC is RoHS non-compliant, making the substitute preferable for new designs and regulated applications.

Q: Are there any packaging differences between the main part and substitute?

A: No. Both devices use the 32-PLCC (J-Lead) package with identical dimensions. Packaging is functionally equivalent for all mechanical and thermal considerations.

Q: What memory interface type do these devices use?

A: Both the AT27C010-12JC and AT27C010-70JU employ a parallel memory interface, supporting 128K x 8 organization with identical address and data bus architecture.