AT27C020-55PI Equivalent & Substitute Parts

Part Overview

The AT27C020-55PI is a 2Mbit parallel EPROM (Erasable Programmable Read-Only Memory) manufactured by Microchip Technology in a 32-DIP package with 55 ns access time. This device is classified as obsolete, making substitute parts necessary for ongoing system support and component procurement. The AT27C020-55PI operates within the 4.5V to 5.5V supply voltage range and supports industrial temperature specifications from -40°C to 85°C.

Substiute Parts

AT27C020-55PI

Microchip TechnologyIn Stock: 869AT27C020-55PI Datasheet

Current PartRFQ

AT27C020-55PU

Microchip TechnologyIn Stock: 7366AT27C020-55PU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT27C020-55PI is determined by strict equivalence across the following critical parameters:

• Memory capacity: 2Mbit (256K x 8 organization)
• Access time: 55 ns maximum
• Interface type: Parallel
• Supply voltage: 4.5V ~ 5.5V
• Operating temperature range: -40°C ~ 85°C
• Package: 32-DIP through-hole configuration
• Manufacturer: Microchip Technology (AT27C020 base product family)

The AT27C020-55PU qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is product status and packaging format, not functional or electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

The AT27C020-55PU is the direct functional equivalent of the AT27C020-55PI. Both devices share identical electrical specifications, memory capacity, access time, and package configuration. The AT27C020-55PU is preferred for new designs and ongoing procurement due to its active product status and ROHS3 compliance. The AT27C020-55PI, classified as obsolete, should be replaced with the AT27C020-55PU in applications requiring component refresh or inventory replenishment. Both devices are manufactured by Microchip Technology and maintain the same base product number (AT27C020), ensuring design compatibility.

Frequently Asked Questions (FAQ)

Q: Can the AT27C020-55PU directly replace the AT27C020-55PI in existing designs?

A: Yes. Both devices are electrically and mechanically identical. They share the same memory capacity (2Mbit), access time (55 ns), supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and 32-DIP package configuration. Pin-for-pin compatibility is maintained.

Q: What is the difference between the AT27C020-55PI and AT27C020-55PU?

A: The primary differences are product status and compliance certification. The AT27C020-55PI is obsolete, while the AT27C020-55PU is active. The AT27C020-55PU is ROHS3 compliant, whereas the AT27C020-55PI is RoHS non-compliant. Electrical and functional specifications are identical.

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

A: No. Both the AT27C020-55PI and AT27C020-55PU use the same 32-DIP (0.600", 15.24mm) through-hole package. PCB footprints and mounting requirements are identical.

Q: Why is the AT27C020-55PI classified as obsolete?

A: The AT27C020-55PI has reached end-of-life status. The AT27C020-55PU remains in active production and is the recommended replacement for new procurement and design updates.

Q: Does the AT27C020-55PU meet current environmental compliance standards?

A: Yes. The AT27C020-55PU is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for component manufacturing and distribution.