AT25640B-MAPDGV-T Equivalent & Substitute Parts

Part Overview

The AT25640B-MAPDGV-T is a 64Kbit EEPROM memory IC manufactured by Microchip Technology, designed for SPI serial interface applications. This device operates at 5 MHz clock frequency with a supply voltage range of 2.5V to 5.5V and is qualified to AEC-Q100 automotive standards. The part is currently in active production status with substantial inventory availability. Substitute parts are identified to provide design flexibility, alternative sourcing options, and compatibility with systems requiring equivalent memory capacity and interface specifications.

Substiute Parts

AT25640B-MAPDGV-T

Microchip TechnologyIn Stock: 4828AT25640B-MAPDGV-T Datasheet

Current PartRFQ

M95640-DFMC6TG

STMicroelectronicsIn Stock: 5780M95640-DFMC6TG Datasheet

MFR RecommendedRFQ

M95640-RMC6TG

STMicroelectronicsIn Stock: 8650M95640-RMC6TG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT25640B-MAPDGV-T are qualified based on the following critical parameters that must remain consistent:

• Memory capacity: 64Kbit
• Memory organization: 8K x 8 configuration
• Interface protocol: SPI serial interface
• Package footprint: 8-UFDFN Exposed Pad (2x3)
• Write cycle time: 5ms
• RoHS compliance: ROHS3 Compliant
• Mounting technology: Surface Mount

The identified substitutes maintain these core electrical and mechanical specifications. Variations in clock frequency, supply voltage range, operating temperature range, and moisture sensitivity level are permitted within the scope of equivalent substitution, provided the application requirements accommodate these differences.

Parameter Comparison

Engineering Selection Recommendations

Both M95640-DFMC6TG and M95640-RMC6RG are active production parts from STMicroelectronics with ROHS3 compliance and equivalent memory specifications to the AT25640B-MAPDGV-T. The primary differences between the main part and substitutes are clock frequency capability and operating temperature range.

The AT25640B-MAPDGV-T operates at 5 MHz with an extended temperature range to 125°C and carries AEC-Q100 automotive qualification. The STMicroelectronics M95640 variants operate at 20 MHz with a maximum temperature of 85°C and do not carry automotive qualification in the provided specifications.

Selection between these parts should be based on application requirements for maximum operating temperature and clock frequency specifications. The M95640 variants offer improved moisture sensitivity characteristics and lower minimum supply voltage. All three parts maintain identical memory capacity, organization, SPI interface, write cycle time, and package footprint.

Frequently Asked Questions (FAQ)

Q: Can M95640-DFMC6TG or M95640-RMC6TG be used as direct replacements for AT25640B-MAPDGV-T?

A: These parts are electrically and mechanically compatible substitutes for applications where the operating temperature does not exceed 85°C and automotive qualification is not required. The identical memory capacity, organization, SPI interface, write cycle time, and package footprint ensure functional compatibility at the circuit board level.

Q: What is the difference between M95640-DFMC6TG and M95640-RMC6TG?

A: Both parts are identical in electrical specifications and package type. The difference is in packaging format: M95640-DFMC6TG is supplied in Tape & Reel (TR) format, while M95640-RMC6TG is supplied in Cut Tape (CT) and Digi-Reel® format. Selection depends on assembly process requirements and order quantity.

Q: Why does the AT25640B-MAPDGV-T have a lower clock frequency than the M95640 substitutes?

A: The AT25640B-MAPDGV-T operates at 5 MHz, while the M95640 variants operate at 20 MHz. Both specifications are provided by the manufacturers and reflect design differences. Applications requiring only 5 MHz operation will function with either part. Applications requiring higher clock frequencies benefit from the M95640 variants.

Q: Are there temperature limitations when substituting with M95640 parts?

A: The AT25640B-MAPDGV-T operates to 125°C, while M95640-DFMC6TG and M95640-RMC6TG operate to 85°C maximum. Substitution is appropriate only for applications where the maximum operating temperature does not exceed 85°C.

Q: Do the substitute parts have the same package footprint?

A: Yes. All three parts use the 8-UFDFN Exposed Pad package in 2x3mm form factor, ensuring identical PCB footprint and mounting compatibility.

Q: What is the moisture sensitivity difference between these parts?

A: The AT25640B-MAPDGV-T has MSL 3 (168 Hours), while both M95640 variants have MSL 1 (Unlimited). Lower MSL ratings indicate better moisture resistance and longer shelf life without baking requirements.