AT27C4096-90PI EPROM Equivalent & Substitute Parts

Part Overview

The AT27C4096-90PI is a 4Mbit parallel EPROM (Erasable Programmable Read-Only Memory) manufactured by Microchip Technology in a 40-pin DIP package with 90 ns access time. This part is classified as obsolete, making identification of compatible substitutes essential for ongoing system support and component procurement. The AT27C4096-90PI operates within the 4.5V to 5.5V supply voltage range and supports industrial temperature specifications from -40°C to 85°C.

Substiute Parts

AT27C4096-90PI

Microchip TechnologyIn Stock: 1354AT27C4096-90PI Datasheet

Current PartRFQ

AT27C4096-90PU

Microchip TechnologyIn Stock: 1800AT27C4096-90PU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT27C4096-90PI is determined by strict equivalence across the following critical parameters:

• Memory Capacity & Organization: 4Mbit capacity with 256K x 16 organization
• Memory Technology: EPROM - OTP (One-Time Programmable) format
• Interface Type: Parallel interface configuration
• Access Time: 90 ns specification
• Electrical Specifications: 4.5V ~ 5.5V supply voltage and -40°C ~ 85°C operating temperature range
• Physical Package: 40-pin DIP (0.600", 15.24mm) with Through Hole mounting
• Base Product Number: AT27C4096 series

The AT27C4096-90PU qualifies as a direct substitute based on identical electrical, functional, and mechanical parameters. The primary distinction is packaging format (Tube vs. standard packaging) and product status (Active vs. Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The AT27C4096-90PU is a direct functional and electrical equivalent to the AT27C4096-90PI. Selection between these parts should be based on the following criteria:

AT27C4096-90PU Selection Factors:

• Active product status ensures ongoing manufacturer support and availability
• ROHS3 compliance meets modern environmental and regulatory requirements
• Identical electrical and mechanical specifications guarantee pin-for-pin compatibility
• Tube packaging format accommodates automated assembly processes

AT27C4096-90PI Considerations:

• Obsolete status limits future procurement options
• RoHS non-compliant designation may conflict with system-level compliance requirements
• Existing inventory availability (1325 Pcs) supports legacy system maintenance only

For new designs or system upgrades, the AT27C4096-90PU is the appropriate selection. For legacy system maintenance where AT27C4096-90PI inventory exists, direct substitution with AT27C4096-90PU is electrically and mechanically valid.

Frequently Asked Questions (FAQ)

Q: Can AT27C4096-90PU replace AT27C4096-90PI in existing applications?

A: Yes. Both parts share identical memory capacity (4Mbit), organization (256K x 16), access time (90 ns), supply voltage (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and 40-pin DIP package configuration. Pin-for-pin compatibility is complete.

Q: What is the difference between AT27C4096-90PI and AT27C4096-90PU?

A: The primary differences are product status (Obsolete vs. Active), RoHS compliance (non-compliant vs. ROHS3 Compliant), and packaging format (standard vs. Tube). Electrical and functional specifications are identical.

Q: Does packaging format affect electrical performance?

A: No. Tube packaging is a distribution and handling format only. It does not alter electrical characteristics, performance, or compatibility. The internal die and electrical specifications remain unchanged.

Q: Is the AT27C4096-90PU suitable for new product designs?

A: Yes. Active product status, ROHS3 compliance, and identical electrical specifications make AT27C4096-90PU appropriate for new designs requiring 4Mbit parallel EPROM functionality.

Q: What are the key parameters that determine substitution eligibility?

A: Memory capacity (4Mbit), organization (256K x 16), technology (EPROM - OTP), interface (Parallel), access time (90 ns), supply voltage (4.5V ~ 5.5V), operating temperature (-40°C ~ 85°C), and package type (40-DIP) must match exactly for substitution.