AT27BV1024-90JC EPROM Equivalent & Substitute Parts

Part Overview

The AT27BV1024-90JC is a 1Mbit parallel EPROM (Erasable Programmable Read-Only Memory) manufactured by Microchip Technology in a 44-PLCC surface mount package. This part operates with dual voltage supply ranges (2.7V–3.6V and 4.5V–5.5V) and delivers 90 ns access time across a 64K x 16 memory organization.

The AT27BV1024-90JC is classified as obsolete. Identifying equivalent substitute parts is necessary for ongoing system support, design updates, and procurement continuity when original inventory becomes unavailable.

Substiute Parts

AT27BV1024-90JC

Microchip TechnologyIn Stock: 4269AT27BV1024-90JC Datasheet

Current PartRFQ

AT27BV1024-90JU

Microchip TechnologyIn Stock: 1831AT27BV1024-90JU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT27BV1024-90JC is determined by strict equivalence across the following parameters:

• Memory capacity: 1Mbit
• Memory organization: 64K x 16
• Memory technology: EPROM (OTP)
• Parallel interface architecture
• Access time: 90 ns
• Voltage supply ranges: 2.7V–3.6V and 4.5V–5.5V
• Package specification: 44-PLCC (16.6x16.6)
• Mounting configuration: Surface Mount

The AT27BV1024-90JU meets all electrical and mechanical substitution criteria. Both parts share identical base product number (AT27BV1024), manufacturer (Microchip Technology), and core functional specifications.

Parameter Comparison

Engineering Selection Recommendations

The AT27BV1024-90JU is the direct substitute for the AT27BV1024-90JC. Both parts are electrically and mechanically equivalent across all specified parameters.

The AT27BV1024-90JU offers two significant advantages:

• Active product status ensures continued availability and manufacturer support
• ROHS3 compliance satisfies modern regulatory requirements, whereas the AT27BV1024-90JC is RoHS non-compliant

The AT27BV1024-90JU operates across an extended temperature range (−40°C–85°C) compared to the AT27BV1024-90JC (0°C–70°C), providing broader environmental tolerance for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can the AT27BV1024-90JU directly replace the AT27BV1024-90JC in existing designs?

A: Yes. Both parts are pin-compatible, electrically equivalent, and mechanically identical. No circuit modifications are required for substitution.

Q: What is the difference between the -90JC and -90JU suffix designations?

A: The suffix indicates packaging configuration. The -JC variant uses standard packaging, while the -JU variant uses tube packaging. Electrical and functional specifications remain identical.

Q: Are there any compliance differences between these parts?

A: Yes. The AT27BV1024-90JU is ROHS3 compliant, while the AT27BV1024-90JC is RoHS non-compliant. For applications subject to RoHS regulations, the AT27BV1024-90JU is required.

Q: Does the extended temperature range of the AT27BV1024-90JU affect circuit design?

A: No. The extended operating range (−40°C–85°C versus 0°C–70°C) does not alter electrical characteristics or timing specifications. It provides additional environmental tolerance without design changes.

Q: Are both parts manufactured by the same company?

A: Yes. Both the AT27BV1024-90JC and AT27BV1024-90JU are manufactured by Microchip Technology and share the same base product number (AT27BV1024).