AT45DB081D-MU Equivalent & Substitute Parts

Part Overview

The AT45DB081D-MU is an 8Mbit SPI FLASH memory IC manufactured by Renesas Electronics Corporation, packaged in 8-VDFN (6x5) with a 66 MHz clock frequency. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part maintains 20,183 units in current inventory as new original stock.

Substiute Parts

AT45DB081D-MU

Renesas Electronics CorporationIn Stock: 20220AT45DB081D-MU Datasheet

Current PartRFQ

AT45DB081E-MHN-T

Renesas Electronics CorporationIn Stock: 72631AT45DB081E-MHN-T Datasheet

DirectRFQ

AT45DB081E-MHN-Y

Renesas Electronics CorporationIn Stock: 1099AT45DB081E-MHN-Y Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT45DB081D-MU is based on the following critical parameters that must remain compatible:

• Memory Size: 8Mbit (fixed requirement)
• Memory Format: FLASH (fixed requirement)
• Memory Interface: SPI (fixed requirement)
• Memory Organization: 264 Bytes x 4096 pages (fixed requirement)
• Operating Temperature Range: -40°C ~ 85°C (fixed requirement)
• Mounting Type: Surface Mount (fixed requirement)

The substitute parts AT45DB081E-MHN-T and AT45DB081E-MHN-Y share the same base product number (AT45DB081) and maintain identical memory capacity, organization, interface, and temperature specifications. Both substitutes operate at an enhanced clock frequency of 85 MHz, which is backward compatible with the original 66 MHz specification. The voltage supply range has been extended to 1.7V ~ 3.6V in the substitutes, providing broader operational flexibility. Package differences exist in the physical form factor (8-UDFN versus 8-VDFN) and packaging configuration (Tape & Reel or Tray versus the original specification).

Parameter Comparison

Engineering Selection Recommendations

The AT45DB081E-MHN-T and AT45DB081E-MHN-Y are direct functional equivalents to the AT45DB081D-MU. Both substitute parts carry Active product status, ensuring long-term availability and manufacturing support. The substitutes provide ROHS3 compliance and improved moisture sensitivity ratings (MSL 1 versus MSL 3), meeting modern environmental and reliability standards.

Selection between the two substitute options depends on procurement and assembly requirements. The AT45DB081E-MHN-T is supplied in Tape & Reel configuration, suitable for automated pick-and-place assembly operations. The AT45DB081E-MHN-Y is supplied in Tray configuration, appropriate for manual assembly or alternative handling processes. Both maintain identical electrical specifications and functional performance.

The enhanced clock frequency of 85 MHz in the substitutes provides performance headroom beyond the original 66 MHz specification. The extended voltage supply range (1.7V ~ 3.6V) offers greater design flexibility compared to the original 2.7V ~ 3.6V range. Package form factor differences (8-UDFN versus 8-VDFN) require PCB layout verification to ensure mechanical and electrical compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Can AT45DB081E-MHN-T or AT45DB081E-MHN-Y be used as direct replacements for AT45DB081D-MU?

A: Both substitute parts are functionally equivalent. They maintain identical memory capacity (8Mbit), organization (264 Bytes x 4096 pages), interface (SPI), and operating temperature range (-40°C ~ 85°C). The primary consideration is package form factor compatibility. The substitutes use 8-UDFN (5x6) packaging versus the original 8-VDFN (6x5), requiring PCB layout verification.

Q: What is the difference between AT45DB081E-MHN-T and AT45DB081E-MHN-Y?

A: Both parts are electrically and functionally identical. The difference lies in packaging configuration: AT45DB081E-MHN-T is supplied in Tape & Reel format for automated assembly, while AT45DB081E-MHN-Y is supplied in Tray format. Selection depends on assembly process requirements and handling procedures.

Q: Does the higher clock frequency (85 MHz) of the substitutes affect compatibility?

A: No. The 85 MHz clock frequency of the substitute parts is backward compatible with designs specified for 66 MHz operation. The higher frequency provides performance margin and does not introduce incompatibility with existing firmware or system timing requirements.

Q: Are there voltage supply considerations when switching to the substitute parts?

A: The substitute parts support an extended voltage range (1.7V ~ 3.6V) compared to the original (2.7V ~ 3.6V). This extended range is fully compatible with designs operating within the original 2.7V ~ 3.6V specification and provides additional flexibility for lower-voltage applications.

Q: What compliance certifications do the substitute parts carry?

A: Both AT45DB081E-MHN-T and AT45DB081E-MHN-Y are ROHS3 compliant and REACH unaffected. They carry improved moisture sensitivity ratings (MSL 1 with unlimited shelf life) compared to the original part (MSL 3 with 168-hour limitation), meeting current environmental and reliability standards.

Q: How do package dimensions affect PCB design?

A: The original AT45DB081D-MU uses 8-VDFN (6x5) packaging, while substitutes use 8-UDFN (5x6). Although both are 8-pin packages with exposed pads, the physical dimensions differ. PCB footprint, trace routing, and thermal management layouts require verification to ensure mechanical fit and electrical performance.