AT28C64B-15PC EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The AT28C64B-15PC is a 64Kbit parallel EEPROM memory IC manufactured by Microchip Technology, housed in a 28-DIP package with 150 ns access time. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs requiring this memory architecture. The part operates within the 4.5V to 5.5V supply voltage range and supports 8K x 8 memory organization with parallel interface configuration.

Substiute Parts

AT28C64B-15PC

Microchip TechnologyIn Stock: 5244AT28C64B-15PC Datasheet

Current PartRFQ

AT28C64B-15PU

Microchip TechnologyIn Stock: 3411AT28C64B-15PU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT28C64B-15PC is determined by strict equivalence across the following critical parameters:

• Memory capacity: 64Kbit
• Memory organization: 8K x 8 configuration
• Interface type: Parallel
• Package format: 28-DIP
• Mounting technology: Through Hole
• Supply voltage compatibility: 4.5V ~ 5.5V range
• Access time: 150 ns or faster

The AT28C64B-15PU qualifies as a direct substitute based on identical electrical specifications, memory architecture, and physical packaging. The primary distinction lies in product status and operating temperature range, which do not affect core memory functionality or pin compatibility.

Parameter Comparison

Engineering Selection Recommendations

The AT28C64B-15PU is the direct functional equivalent for AT28C64B-15PC replacement. Selection between these parts should be based on the following criteria:

For new designs and long-term availability: The AT28C64B-15PU is the preferred choice due to active product status, extended operating temperature range (-40°C to 85°C versus 0°C to 70°C), and ROHS3 compliance. These attributes ensure sustained supply chain access and regulatory alignment.

For legacy system maintenance: The AT28C64B-15PC remains suitable for existing applications where the narrower operating temperature range (0°C to 70°C) satisfies thermal requirements and RoHS non-compliance does not conflict with system certifications.

Both parts maintain identical electrical performance, memory architecture, and physical packaging, ensuring pin-for-pin compatibility and functional interchangeability within their respective operating temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can AT28C64B-15PU directly replace AT28C64B-15PC in existing PCB designs?

A: Yes. Both parts share identical pin configurations, package dimensions (28-DIP), and electrical specifications. Direct socket substitution is supported without PCB modification.

Q: What is the primary difference between AT28C64B-15PC and AT28C64B-15PU?

A: The AT28C64B-15PU features an extended operating temperature range (-40°C to 85°C) compared to the AT28C64B-15PC (0°C to 70°C), and maintains active product status with ROHS3 compliance. Core memory functionality and electrical performance are identical.

Q: Why is AT28C64B-15PC classified as obsolete?

A: Obsolete status indicates the part is no longer in active production. The AT28C64B-15PU serves as the current production equivalent with enhanced specifications and compliance certifications.

Q: Are there packaging differences between these parts?

A: The AT28C64B-15PC uses standard DIP packaging, while the AT28C64B-15PU is supplied in tube packaging. Both maintain the same 28-DIP physical form factor and pin layout.

Q: What compliance certifications apply to each part?

A: The AT28C64B-15PC is RoHS non-compliant. The AT28C64B-15PU is ROHS3 compliant. Both parts are REACH unaffected and classified under ECCN EAR99.