AT45DB642D-CNU Equivalent & Substitute Parts

Part Overview

The AT45DB642D-CNU is a 64Mbit Serial Peripheral Interface (SPI) FLASH memory IC manufactured by Renesas Electronics Corporation. This component operates at 66 MHz and is housed in an 8-CASON (6x8) surface mount package. The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

AT45DB642D-CNU

Renesas Electronics CorporationIn Stock: 17010AT45DB642D-CNU Datasheet

Current PartRFQ

AT45DB641E-MWHN-T

Renesas Electronics CorporationIn Stock: 12591AT45DB641E-MWHN-T Datasheet

DirectRFQ

AT45DB641E-MWHN-Y

Renesas Electronics CorporationIn Stock: 1983AT45DB641E-MWHN-Y Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT45DB642D-CNU are identified based on the following critical parameters:

• Memory Capacity: 64Mbit (non-negotiable)
• Memory Type: Non-volatile FLASH
• Interface Protocol: SPI
• Package Format: 8-VDFN (6x8) surface mount
• Operating Temperature Range: -40°C ~ 85°C
• Supply Voltage Compatibility: Overlapping voltage ranges

The substitute parts AT45DB641E-MWHN-T and AT45DB641E-MWHN-Y meet these core substitution criteria. Both are active products from Renesas Electronics Corporation with identical memory capacity, interface type, package configuration, and temperature specifications. The primary differences relate to clock frequency, memory organization, and packaging format (Cut Tape vs. Tray), which do not preclude functional substitution in applications designed for the AT45DB642D-CNU.

Parameter Comparison

Engineering Selection Recommendations

The AT45DB641E-MWHN-T and AT45DB641E-MWHN-Y are functionally equivalent substitutes for the obsolete AT45DB642D-CNU. Both substitute parts are active products with current manufacturing status, ensuring long-term availability and supply chain continuity.

AT45DB641E-MWHN-T is supplied in Cut Tape (CT) & Digi-Reel® packaging format, suitable for automated assembly processes and high-volume production environments.

AT45DB641E-MWHN-Y is supplied in Tray packaging format, appropriate for manual assembly or lower-volume applications.

Both substitute parts demonstrate superior compliance characteristics: ROHS3 compliance and Moisture Sensitivity Level 1 (unlimited shelf life) compared to the original part's MSL 3 rating. The extended supply voltage range (1.7V ~ 3.6V) of the substitute parts provides additional design flexibility while maintaining full backward compatibility with the original 2.7V ~ 3.6V specification.

Frequently Asked Questions (FAQ)

Q: Can AT45DB641E-MWHN-T and AT45DB641E-MWHN-Y be used interchangeably with AT45DB642D-CNU?

A: Yes. Both substitute parts share identical memory capacity (64Mbit), interface protocol (SPI), package type (8-VDFN), and operating temperature range (-40°C ~ 85°C). The primary differences are clock frequency (85 MHz vs. 66 MHz) and memory organization, which do not prevent functional substitution. The substitute parts operate within the original supply voltage range and are pin-compatible.

Q: What is the difference between AT45DB641E-MWHN-T and AT45DB641E-MWHN-Y?

A: Both parts are electrically identical. The difference is packaging format: AT45DB641E-MWHN-T is supplied in Cut Tape & Digi-Reel® format for automated assembly, while AT45DB641E-MWHN-Y is supplied in Tray format. Selection depends on assembly process requirements and volume.

Q: Why is the AT45DB642D-CNU listed as obsolete?

A: The AT45DB642D-CNU has reached end-of-life status. The substitute parts AT45DB641E-MWHN-T and AT45DB641E-MWHN-Y are active products with ongoing manufacturing support from Renesas Electronics Corporation.

Q: Are there any compliance differences between the original and substitute parts?

A: Yes. The substitute parts are ROHS3 compliant and carry