AT27C512R-15PC Equivalent & Substitute Parts

Part Overview

The AT27C512R-15PC is a 512Kbit EPROM (Erasable Programmable Read-Only Memory) IC manufactured by Microchip Technology in a 28-DIP package. This part operates with a 150 ns access time and is designed for parallel memory applications requiring non-volatile storage. The AT27C512R-15PC is classified as obsolete, making identification of compatible substitute parts essential for system maintenance, legacy equipment repair, and design updates where continued supply cannot be guaranteed.

Substiute Parts

AT27C512R-15PC

Microchip TechnologyIn Stock: 2199AT27C512R-15PC Datasheet

Current PartRFQ

AT27C512R-70PU

Microchip TechnologyIn Stock: 6889AT27C512R-70PU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT27C512R-15PC is determined by strict equivalence in the following parameters:

• Memory Capacity & Organization: 512Kbit capacity with 64K x 8 organization is mandatory for functional compatibility
• Memory Interface: Parallel interface is required for pin-level compatibility
• Package & Pinout: 28-DIP package with identical physical dimensions (0.600", 15.24mm) ensures mechanical and electrical socket compatibility
• Voltage Supply Range: 4.5V ~ 5.5V compatibility ensures operation within the same power distribution system
• Access Time: Substitute parts with equal or faster access times (≤150 ns) maintain or improve system timing performance

The AT27C512R-70PU meets all substitution criteria as a direct equivalent from the same manufacturer with identical memory specifications and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The AT27C512R-70PU is a direct functional substitute for the AT27C512R-15PC. Key selection factors:

• Product Status: The AT27C512R-70PU maintains active product status with verified programmability, ensuring continued availability and supply chain reliability compared to the obsolete AT27C512R-15PC
• Access Time Advantage: The 70 ns access time of the substitute part is faster than the 150 ns specification of the main part, providing improved system timing margins without requiring circuit redesign
• Temperature Range Extension: The substitute part operates across -40°C ~ 85°C, exceeding the 0°C ~ 70°C range of the main part and supporting broader environmental applications
• Compliance Status: The AT27C512R-70PU is ROHS3 compliant, whereas the AT27C512R-15PC is RoHS non-compliant, making the substitute suitable for applications with regulatory compliance requirements
• Electrical Compatibility: Both parts share identical voltage supply requirements (4.5V ~ 5.5V) and package configuration, enabling direct socket replacement without circuit modification

Frequently Asked Questions (FAQ)

Q: Can the AT27C512R-70PU be used as a direct replacement for the AT27C512R-15PC?

A: Yes. Both parts are 512Kbit EPROM devices with identical memory organization (64K x 8), parallel interface, 28-DIP package, and voltage supply specifications. The substitute part is electrically and mechanically compatible for direct socket replacement.

Q: What is the difference between the access times of these parts?

A: The AT27C512R-15PC has a 150 ns access time, while the AT27C512R-70PU has a 70 ns access time. The faster access time of the substitute part does not create compatibility issues and typically improves system performance margins.

Q: Are there package or pinout differences between these parts?

A: No. Both parts use the 28-DIP package with identical physical dimensions (0.600", 15.24mm) and pinout configuration, ensuring mechanical and electrical compatibility in existing PCB designs.

Q: Why is the AT27C512R-15PC listed as obsolete?

A: The AT27C512R-15PC has reached end-of-life status with Microchip Technology. The AT27C512R-70PU remains in active production, making it the recommended choice for new designs and legacy system maintenance.

Q: Does the substitute part require different supply voltage?

A: No. Both parts operate within the same voltage supply range of 4.5V ~ 5.5V, requiring no power distribution circuit modifications.

Q: What is the operating temperature range difference?

A: The AT27C512R-15PC operates from 0°C ~ 70°C, while the AT27C512R-70PU operates from -40°C ~ 85°C. The substitute part supports extended temperature applications without functional degradation.