AT28C64B-15PI Equivalent & Substitute Parts

Part Overview

The AT28C64B-15PI is a 64Kbit parallel EEPROM memory IC manufactured by Microchip Technology, housed in a 28-DIP package with 150 ns access time. This part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs. The AT28C64B-15PI operates within the 4.5V to 5.5V supply voltage range and supports standard parallel memory interface protocols suitable for legacy embedded systems and industrial applications.

Substiute Parts

AT28C64B-15PI

Microchip TechnologyIn Stock: 9753AT28C64B-15PI Datasheet

Current PartRFQ

AT28C64B-15PU

Microchip TechnologyIn Stock: 3411AT28C64B-15PU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT28C64B-15PI is determined by strict equivalence across the following critical parameters: memory capacity (64Kbit), memory organization (8K x 8), parallel interface architecture, access time specification (150 ns), write cycle time (10 ms), supply voltage range (4.5V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and physical package format (28-DIP through-hole). The AT28C64B-15PU qualifies as a direct substitute based on complete alignment with all electrical and mechanical specifications. The primary distinction between these parts is packaging format (tube versus bulk) and product status (active versus obsolete), with no impact on functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

The AT28C64B-15PU is the direct functional equivalent for the obsolete AT28C64B-15PI. Selection of the AT28C64B-15PU is supported by: identical electrical specifications across all memory parameters, matching physical package dimensions enabling direct PCB compatibility, active product status ensuring continued availability, and ROHS3 compliance providing improved environmental and regulatory standing compared to the non-compliant original part. Both parts share the same base product number (AT28C64) and are manufactured by Microchip Technology, confirming design lineage and compatibility.

Frequently Asked Questions (FAQ)

Q: Can AT28C64B-15PU be used as a direct replacement for AT28C64B-15PI in existing designs?

A: Yes. The AT28C64B-15PU is electrically and mechanically identical to the AT28C64B-15PI. All memory parameters, access timing, voltage specifications, temperature ratings, and 28-DIP package dimensions are equivalent. Direct PCB substitution is supported without design modification.

Q: What is the difference between the -15PI and -15PU package designations?

A: The suffix designates packaging format. The -15PI uses standard bulk packaging, while the -15PU uses tube packaging. This distinction affects inventory handling and supply chain logistics but does not impact electrical performance or physical compatibility.

Q: Is the AT28C64B-15PU suitable for new product designs?

A: Yes. The AT28C64B-15PU carries active product status and ROHS3 compliance, making it appropriate for new designs. The AT28C64B-15PI is obsolete and should not be specified for new applications.

Q: Are there any compatibility concerns when substituting these parts?

A: No compatibility concerns exist. Identical memory organization (8K x 8), parallel interface protocol, access time (150 ns), write cycle time (10 ms), and supply voltage range (4.5V ~ 5.5V) ensure functional interchangeability. Through-hole mounting and 28-DIP package dimensions are identical.

Q: What compliance advantages does AT28C64B-15PU offer over AT28C64B-15PI?

A: The AT28C64B-15PU is ROHS3 compliant, whereas the AT28C64B-15PI is RoHS non-compliant. This provides improved environmental compliance and regulatory alignment for systems subject to RoHS directives.