AT27C020-90PI EPROM Equivalent & Substitute Parts

Part Overview

The AT27C020-90PI is a 2Mbit parallel EPROM (Erasable Programmable Read-Only Memory) manufactured by Microchip Technology in a 32-DIP package with 90 ns access time. This part is classified as obsolete, which necessitates identification of active equivalent components for ongoing system support and new designs. The AT27C020-90PI operates within the 4.5V to 5.5V supply voltage range and supports industrial temperature specifications from -40°C to 85°C.

Substiute Parts

AT27C020-90PI

Microchip TechnologyIn Stock: 742AT27C020-90PI Datasheet

Current PartRFQ

AT27C020-90PU

Microchip TechnologyIn Stock: 1362AT27C020-90PU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT27C020-90PI is determined by strict equivalence across the following critical parameters:

• Memory capacity: 2Mbit (256K x 8 organization)
• Access time: 90 ns maximum
• Interface type: Parallel
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: -40°C ~ 85°C
• Package: 32-DIP through-hole configuration
• Technology: EPROM - OTP (One-Time Programmable)

The AT27C020-90PU meets all these criteria and is manufactured by the same supplier (Microchip Technology) using the identical base product number AT27C020. The primary distinction between these parts is packaging format and product lifecycle status.

Parameter Comparison

Engineering Selection Recommendations

The AT27C020-90PU is the direct functional equivalent of the AT27C020-90PI. Both components share identical electrical specifications, memory capacity, access time, voltage requirements, and temperature operating range. The AT27C020-90PU is currently in active production status, whereas the AT27C020-90PI is obsolete.

For new designs and ongoing system support, the AT27C020-90PU is the appropriate selection. This part maintains full electrical and mechanical compatibility with the AT27C020-90PI while offering the advantage of active product status and ROHS3 compliance. The AT27C020-90PU is verified as programmable through DiGi-Electronics programming services.

Frequently Asked Questions (FAQ)

Q: Can the AT27C020-90PU directly replace the AT27C020-90PI in existing designs?

A: Yes. Both parts are electrically and mechanically identical. They share the same 32-DIP package, pin configuration, voltage specifications, access time, and memory organization. Direct substitution is possible without circuit modification.

Q: What is the difference between the AT27C020-90PI and AT27C020-90PU?

A: The primary differences are product lifecycle status and regulatory compliance. The AT27C020-90PI is obsolete and RoHS non-compliant. The AT27C020-90PU is in active production and ROHS3 compliant. Electrical and mechanical specifications are identical.

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

A: No. Both parts use the 32-DIP (0.600", 15.24mm) through-hole package with identical pinout and mechanical dimensions.

Q: What does "EPROM - OTP" technology mean?

A: OTP stands for One-Time Programmable. These EPROM devices can be programmed once by the user and retain data indefinitely without power. They cannot be erased and reprogrammed like standard EPROMs.

Q: Is the AT27C020-90PU suitable for industrial temperature applications?

A: Yes. The AT27C020-90PU operates across the -40°C to 85°C temperature range, meeting industrial specifications.