AT27C4096-15PI Equivalent & Substitute Parts

Part Overview

The AT27C4096-15PI is a 4Mbit parallel EPROM (Erasable Programmable Read-Only Memory) manufactured by Microchip Technology in a 40-pin DIP package. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and component procurement. The part operates with a 150 ns access time and is designed for applications requiring non-volatile memory storage with parallel interface architecture.

Substiute Parts

AT27C4096-15PI

Microchip TechnologyIn Stock: 907AT27C4096-15PI Datasheet

Current PartRFQ

AT27C4096-90PU

Microchip TechnologyIn Stock: 1800AT27C4096-90PU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT27C4096-15PI is determined by strict equivalence across the following critical parameters:

• Memory capacity (4Mbit) and organization (256K x 16)
• Parallel interface architecture
• Supply voltage range (4.5V ~ 5.5V)
• Operating temperature range (-40°C ~ 85°C)
• Physical package (40-DIP, 0.600" pitch)
• Through-hole mounting compatibility

The AT27C4096-90PU qualifies as a direct substitute based on identical memory specifications, voltage requirements, temperature range, and package form factor. The primary difference is access time performance (90 ns versus 150 ns), which represents an improvement in speed capability while maintaining full backward compatibility with the original design.

Parameter Comparison

Engineering Selection Recommendations

The AT27C4096-90PU is the qualified substitute for the AT27C4096-15PI based on the following engineering criteria:

• Functional equivalence across all memory specifications and electrical parameters
• Active product status with verified availability (1692 pcs in stock versus 878 pcs for the obsolete part)
• ROHS3 compliance status, meeting current regulatory requirements
• Improved access time performance (90 ns) provides timing margin for legacy system integration
• Identical package and pinout ensure direct board-level replacement without layout modification
• Microchip Technology manufacturer continuity maintains design consistency and supply chain reliability

Frequently Asked Questions (FAQ)

Q: Can the AT27C4096-90PU be used as a direct replacement for the AT27C4096-15PI?

A: Yes. Both devices share identical memory capacity, organization, interface type, voltage supply range, operating temperature range, and physical package. The 90 ns access time of the substitute is faster than the original 150 ns specification, ensuring compatibility with existing timing requirements.

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

A: Access time defines the maximum delay from address presentation to valid data output. The AT27C4096-90PU's 90 ns access time is superior to the AT27C4096-15PI's 150 ns specification. This faster performance does not create compatibility issues in legacy designs; it only improves system timing margins.

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

A: No. Both parts use the 40-DIP package with 0.600" (15.24mm) pitch and identical through-hole mounting. Pin assignments and electrical characteristics are equivalent, enabling direct socket replacement.

Q: Why is the AT27C4096-15PI listed as obsolete?

A: The AT27C4096-15PI has reached end-of-life status in Microchip Technology's product portfolio. The AT27C4096-90PU remains in active production and is the current equivalent offering for this memory capacity and interface type.

Q: Does the ROHS3 compliance of the substitute affect compatibility?

A: No. ROHS3 compliance indicates the substitute meets current environmental and regulatory standards. This status does not alter electrical performance or physical compatibility with the original design.