AT28BV64-25JC Equivalent & Substitute Parts

Part Overview

The AT28BV64-25JC is a 64Kbit parallel EEPROM memory IC manufactured by Microchip Technology, housed in a 32-PLCC package with 250 ns access time. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. The AT28BV64-25JC operates within a 2.7V to 3.6V supply voltage range and supports 8K x 8 memory organization with parallel interface architecture.

Substiute Parts

AT28BV64-25JC

Microchip TechnologyIn Stock: 1065AT28BV64-25JC Datasheet

Current PartRFQ

AT28BV64B-20JU

Microchip TechnologyIn Stock: 1656AT28BV64B-20JU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT28BV64-25JC is determined by strict equivalence across the following parameters:

• Memory capacity: 64Kbit maintained
• Memory organization: 8K x 8 format required
• Memory interface: Parallel interface required
• Package type: 32-PLCC (13.97x11.43) required
• Supply voltage range: 2.7V ~ 3.6V compatible
• Mounting type: Surface Mount required

The AT28BV64B-20JU qualifies as a direct substitute based on identical memory capacity, organization, interface type, and package specifications. Variations in access time (200 ns versus 250 ns) and write cycle time represent performance improvements rather than incompatibilities. Extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) provides broader environmental compatibility.

Parameter Comparison

Engineering Selection Recommendations

The AT28BV64B-20JU is the qualified substitute for the AT28BV64-25JC. Selection of this substitute is supported by:

• Active product status, ensuring ongoing availability and manufacturing support
• ROHS3 compliance, meeting current environmental and regulatory requirements
• Identical memory specifications and package footprint, enabling direct board-level replacement
• Improved access time performance (200 ns) and extended operating temperature range (-40°C ~ 85°C)

The AT28BV64-25JC is obsolete and should not be specified for new designs. Existing designs using the AT28BV64-25JC should transition to the AT28BV64B-20JU to maintain supply chain continuity and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the AT28BV64B-20JU replace the AT28BV64-25JC in existing applications?

A: Yes. Both parts share identical memory capacity (64Kbit), organization (8K x 8), parallel interface, supply voltage range (2.7V ~ 3.6V), and 32-PLCC package specifications. The substitute offers improved access time and extended temperature range.

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

A: The AT28BV64-25JC has 250 ns access time, while the AT28BV64B-20JU has 200 ns access time. The faster access time of the substitute represents a performance improvement and does not create compatibility issues.

Q: Are there package compatibility concerns?

A: No. Both parts use the 32-PLCC (13.97x11.43) package with surface mount configuration. Footprint and pinout are identical.

Q: Why is the AT28BV64-25JC obsolete?

A: The AT28BV64-25JC is classified as obsolete by the manufacturer. The AT28BV64B-20JU is the active replacement, offering improved specifications and regulatory compliance.

Q: Does the AT28BV64B-20JU meet current compliance requirements?

A: Yes. The AT28BV64B-20JU is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The AT28BV64-25JC is non-compliant with RoHS requirements.