AT27C010-90JI Equivalent & Substitute Parts

Part Overview

The AT27C010-90JI is a 1Mbit EPROM (Erasable Programmable Read-Only Memory) IC manufactured by Microchip Technology in a 32-PLCC surface mount package. This part operates with a 90 ns access time and is designed for parallel memory interface applications requiring non-volatile storage. The AT27C010-90JI is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support, maintenance, and component procurement.

Substiute Parts

AT27C010-90JI

Microchip TechnologyIn Stock: 2239AT27C010-90JI Datasheet

Current PartRFQ

AT27C010-45JU

Microchip TechnologyIn Stock: 1220AT27C010-45JU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT27C010-90JI is determined by strict equivalence across the following critical parameters:

• Memory Size: 1Mbit (non-negotiable)
• Memory Organization: 128K x 8 (non-negotiable)
• Memory Format: EPROM (non-negotiable)
• Memory Interface: Parallel (non-negotiable)
• Package Type: 32-PLCC (13.97x11.43) (non-negotiable)
• Voltage Supply Range: 4.5V ~ 5.5V (non-negotiable)
• Operating Temperature Range: -40°C ~ 85°C (non-negotiable)

Access time may vary within the same product family, provided the substitute part meets or exceeds the performance requirements of the original specification. The AT27C010-45JU qualifies as a direct substitute based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

The AT27C010-45JU is the qualified substitute for the AT27C010-90JI. Selection of this substitute is supported by the following factors:

• Identical memory capacity, organization, and interface specifications ensure functional compatibility
• Faster access time (45 ns vs. 90 ns) provides performance improvement without compromising system requirements
• Active product status ensures ongoing availability and supply chain continuity
• ROHS3 compliance of the substitute part aligns with modern environmental and regulatory standards
• Identical package geometry and mounting type eliminate PCB redesign requirements

Frequently Asked Questions (FAQ)

Q: Can the AT27C010-45JU be used as a direct replacement for the AT27C010-90JI?

A: Yes. The AT27C010-45JU meets all electrical and mechanical specifications required for substitution. The faster access time represents an improvement over the original part specification.

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

A: Access time defines the maximum delay from address input to valid data output. The AT27C010-45JU (45 ns) is faster than the AT27C010-90JI (90 ns). Systems designed for 90 ns operation will function correctly with the faster 45 ns part.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 32-PLCC package with dimensions 13.97 x 11.43 mm. No PCB modifications are required for substitution.

Q: What is the difference in RoHS compliance between these parts?

A: The AT27C010-90JI is RoHS non-compliant, while the AT27C010-45JU is ROHS3 compliant. For applications subject to RoHS regulations, the substitute part is the appropriate choice.

Q: Do both parts have the same moisture sensitivity level?

A: Yes. Both parts are classified as MSL 2 with a 1-year floor life, requiring identical handling and storage protocols.

Q: Is the voltage supply range identical?

A: Yes. Both parts operate within the 4.5V to 5.5V supply range and share the same operating temperature range of -40°C to 85°C.