Equivalent & Substitute Parts for AT28C64E-25PC

Part Overview

The AT28C64E-25PC is an EEPROM Memory IC manufactured by Microchip Technology, offering 64Kbit capacity with parallel interface in a 28-DIP (0.600", 15.24mm) through-hole package. As an obsolete part, finding suitable substitute models is necessary for continued production support, maintenance, or legacy system repair. Only parts matching critical electrical, mechanical, and interface specifications can be considered direct substitutes.

Substiute Parts

AT28C64E-25PC

Microchip TechnologyIn Stock: 1125AT28C64E-25PC Datasheet

Current PartRFQ

X28HC64PZ-12

Renesas Electronics CorporationIn Stock: 2139X28HC64PZ-12 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are selected strictly based on matching the following key parameters: Memory Type (EEPROM), Memory Size (64Kbit), Memory Organization (8K x 8), Memory Interface (Parallel), Voltage Supply Range (4.5V ~ 5.5V), Operating Temperature Range (0°C ~ 70°C), Mounting Type (Through Hole), and Package/Case (28-DIP (0.600", 15.24mm)). Only parts aligning with these factors are included as suitable equivalents.

Parameter Comparison

Engineering Selection Recommendations

The AT28C64E-25PC is obsolete and RoHS non-compliant. Substitute part X28HC64PZ-12 is active and ROHS3 compliant. For RoHS-compliant and currently available inventory, X28HC64PZ-12 meets the matching functional parameters and environmental requirements. Moisture Sensitivity Level differs; consideration should be given to assembly process compatibility. Selected substitutes must remain within the defined operational, electrical, and mechanical criteria.

Frequently Asked Questions (FAQ)

Q1: What are the most critical criteria for selecting substitutes for AT28C64E-25PC?
A1: Substitute EEPROM ICs must match memory type, size, organization, parallel interface, voltage supply range, operating temperature range, mounting type, and package dimensions.

Q2: Are there compatibility issues related to package and mounting type?
A2: Both the AT28C64E-25PC and its substitute, X28HC64PZ-12, use the 28-DIP (0.600", 15.24mm) through-hole package, ensuring compatibility for PCB footprint and mechanical mounting.

Q3: Is RoHS compliance required for selection?
A3: RoHS compliance is determined by project and regulatory requirements. The AT28C64E-25PC is RoHS non-compliant, while X28HC64PZ-12 is ROHS3 compliant.

Q4: Does the difference in Moisture Sensitivity Level impact selection?
A4: The AT28C64E-25PC has an MSL of 1 (Unlimited), and X28HC64PZ-12 has MSL 3 (168 Hours). Assembly storage or handling procedures may need adjustment for substitutes with higher sensitivity levels.

Q5: Can substitute EEPROMs with differing access or write cycle times be used?
A5: Substitutes are acceptable if all mandated electrical and mechanical parameters are matched. Review system timing requirements to confirm suitability within defined limits.