AT27C080-12JC Equivalent & Substitute Parts

Part Overview

The AT27C080-12JC is an 8Mbit parallel EPROM (Erasable Programmable Read-Only Memory) manufactured by Microchip Technology in a 32-PLCC surface mount package. This part is classified as obsolete and is no longer in active production. Finding equivalent or substitute components is necessary due to product discontinuation and the need for continued system support or new designs requiring this memory capacity and interface type.

Substiute Parts

AT27C080-12JC

Microchip TechnologyIn Stock: 1093AT27C080-12JC Datasheet

Current PartRFQ

AT27C080-90JU

Microchip TechnologyIn Stock: 1350AT27C080-90JU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT27C080-12JC is determined by the following critical parameters:

• Memory Capacity & Organization: Must be 8Mbit with 1M x 8 organization to maintain functional compatibility
• Memory Type & Format: Must be EPROM (OTP) technology to preserve programming characteristics
• Interface Type: Must be parallel interface for direct pin compatibility
• Package & Pinout: Must be 32-PLCC (J-Lead) surface mount to ensure mechanical and electrical fit
• Voltage Supply: Must operate within 4.5V ~ 5.5V range for power supply compatibility
• Access Time: Faster or equal access time is acceptable; slower access time may impact system timing

The AT27C080-90JU qualifies as a direct substitute based on these parameters. It maintains identical memory capacity, organization, interface, and package specifications while offering improved access time performance.

Parameter Comparison

Engineering Selection Recommendations

The AT27C080-90JU is the qualified substitute for the AT27C080-12JC based on the following factors:

• Functional Equivalence: Identical memory capacity, organization, interface, and package ensure direct pin-for-pin compatibility
• Performance Enhancement: 90 ns access time is faster than the original 120 ns specification, providing improved system performance margins
• Product Availability: Active production status ensures continued supply and availability
• Compliance Advantage: ROHS3 compliance status meets current environmental and regulatory requirements, whereas the original part is non-compliant
• Temperature Range Expansion: Extended operating temperature range (-40°C ~ 85°C) provides greater operational flexibility compared to the original 0°C ~ 70°C range

Frequently Asked Questions (FAQ)

Q: Can the AT27C080-90JU be used as a direct replacement for the AT27C080-12JC?

A: Yes. Both parts share identical memory capacity (8Mbit), organization (1M x 8), parallel interface, and 32-PLCC package. The substitute offers faster access time (90 ns vs. 120 ns) and operates within the same voltage supply range (4.5V ~ 5.5V).

Q: What is the difference in access time between these parts?

A: The AT27C080-12JC has 120 ns access time, while the AT27C080-90JU has 90 ns access time. The faster access time of the substitute part does not create compatibility issues and may improve system performance.

Q: Are there any package or pinout differences?

A: No. Both parts use the 32-PLCC (J-Lead) surface mount package with identical pinout and mechanical dimensions (13.97 x 11.43 mm).

Q: What is the significance of the RoHS compliance difference?

A: The AT27C080-12JC is RoHS non-compliant, while the AT27C080-90JU is ROHS3 compliant. For new designs or systems requiring environmental compliance certification, the substitute part meets current regulatory standards.

Q: Does the extended temperature range of the substitute part affect compatibility?

A: No. The AT27C080-90JU operates from -40°C ~ 85°C, which encompasses the original part's 0°C ~ 70°C range. This expansion provides greater operational flexibility without creating compatibility constraints.