AT27C080-15PC Equivalent & Substitute Parts

Part Overview

The AT27C080-15PC is an 8Mbit parallel EPROM (Erasable Programmable Read-Only Memory) manufactured by Microchip Technology in a 32-DIP package. This part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs. The AT27C080-15PC operates with a 150 ns access time and is designed for applications requiring non-volatile memory storage with parallel interface architecture.

Substiute Parts

AT27C080-15PC

Microchip TechnologyIn Stock: 838AT27C080-15PC Datasheet

Current PartRFQ

AT27C080-90PU

Microchip TechnologyIn Stock: 1605AT27C080-90PU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT27C080-15PC is determined by the following critical parameters:

• Memory Capacity & Organization: Must be 8Mbit with 1M x 8 organization to maintain address and data bus compatibility
• Memory Technology: Must be EPROM (OTP) format to preserve non-volatile characteristics
• Parallel Interface: Must support parallel memory interface architecture
• Package & Pinout: Must use 32-DIP package with identical physical dimensions (0.600", 15.24mm) for PCB compatibility
• Voltage Supply: Must operate within 4.5V ~ 5.5V range
• Access Time: Substitute parts with equal or faster access times are functionally compatible

The AT27C080-90PU qualifies as a direct substitute based on these parameters. While it features improved access time (90 ns versus 150 ns) and extended operating temperature range, it maintains identical memory capacity, organization, interface type, and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The AT27C080-90PU is the qualified substitute for AT27C080-15PC applications. Selection rationale is based on the following factors:

• Product Status: The AT27C080-90PU maintains active product status, ensuring continued availability and manufacturing support, whereas the AT27C080-15PC is obsolete
• Compliance: The AT27C080-90PU is ROHS3 compliant, meeting current environmental and regulatory requirements. The AT27C080-15PC is RoHS non-compliant
• Performance Enhancement: The substitute provides faster access time (90 ns), which is a performance improvement over the original specification (150 ns)
• Temperature Range: The AT27C080-90PU supports an extended operating temperature range (-40°C ~ 85°C) compared to the original part (0°C ~ 70°C), providing greater operational flexibility
• Functional Compatibility: Both parts share identical memory capacity, organization, interface architecture, and package configuration, ensuring direct pin-for-pin compatibility

Frequently Asked Questions (FAQ)

Q: Can the AT27C080-90PU be used as a direct replacement for AT27C080-15PC in existing designs?

A: Yes. The AT27C080-90PU is pin-compatible and functionally equivalent. Both parts use the 32-DIP package with identical pinout, operate at the same supply voltage (4.5V ~ 5.5V), and provide 8Mbit parallel EPROM memory with 1M x 8 organization. The faster access time of the substitute (90 ns) is a performance improvement that does not create compatibility issues.

Q: What is the primary difference between these two parts?

A: The main differences are access time (150 ns versus 90 ns), operating temperature range (0°C ~ 70°C versus -40°C ~ 85°C), product status (obsolete versus active), and RoHS compliance (non-compliant versus ROHS3 compliant). The AT27C080-90PU is the active, compliant alternative.

Q: Are there any package or mounting considerations when substituting?

A: No. Both parts use identical 32-DIP through-hole packages with 0.600" (15.24mm) body width. PCB footprints and mounting methods are identical.

Q: Does the faster access time of the AT27C080-90PU affect system compatibility?

A: No. Faster access time is a performance enhancement that maintains backward compatibility. Systems designed for 150 ns access time will operate correctly with 90 ns memory.

Q: What is the inventory status of these parts?

A: The AT27C080-15PC has 730 pieces in stock (obsolete status). The AT27C080-90PU has 1536 pieces in stock (active status), providing greater availability for new orders and ongoing production.