AT45DB021D-MH-T Equivalent & Substitute Parts

Part Overview

The AT45DB021D-MH-T is a 2Mbit SPI FLASH memory IC manufactured by Renesas Electronics Corporation in an 8-UDFN (5x6) surface mount package. This device operates at 66 MHz and is designed for non-volatile data storage applications requiring SPI interface connectivity. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. Active alternatives with enhanced specifications are available from the same manufacturer.

Key Parameters

Parameter	Value
Memory Size	2Mbit
Memory Format	FLASH
Memory Interface	SPI
Clock Frequency	66 MHz
Memory Organization	264 Bytes x 1024 pages
Voltage Supply Range	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package Type	8-UDFN Exposed Pad (5x6)
Mounting Type	Surface Mount
Write Cycle Time	4ms (Page)

Substitute Part Grouping Explanation

Substitution for the AT45DB021D-MH-T is based on the following critical parameters that must remain constant or be compatible:

Memory Capacity: 2Mbit (non-negotiable)
Memory Organization: 264 Bytes x 1024 pages (functional equivalence)
Memory Interface: SPI (protocol compatibility)
Package Type: 8-UDFN Exposed Pad (5x6) (physical and thermal compatibility)
Operating Temperature Range: -40°C ~ 85°C (environmental compatibility)
Mounting Type: Surface Mount (assembly compatibility)

The substitute parts AT45DB021E-MHN-T, AT45DB021E-MHN-Y, and AT45DB021E-MHN2B-T meet all these criteria. These parts represent the active production equivalents with improved specifications, including higher clock frequency (70 MHz), extended voltage supply range (1.65V ~ 3.6V), and enhanced compliance certifications.

Parameter Comparison

Parameter	AT45DB021D-MH-T (Main)	AT45DB021E-MHN-T	AT45DB021E-MHN-Y	AT45DB021E-MHN2B-T
Memory Size	2Mbit	2Mbit	2Mbit	2Mbit
Memory Organization	264 Bytes x 1024 pages	264 Bytes x 1024 pages	264 Bytes x 1024 pages	264 Bytes x 1024 pages
Memory Interface	SPI	SPI	SPI	SPI
Clock Frequency	66 MHz	70 MHz	70 MHz	70 MHz
Voltage Supply Range	2.7V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-UDFN Exposed Pad (5x6)	8-UDFN Exposed Pad (5x6)	8-UDFN Exposed Pad (5x6)	8-UDFN Exposed Pad (5x6)
Write Cycle Time (Page)	4ms	3ms	3ms	3ms
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Format	Bulk	Tape & Reel (TR)	Tray	Tape & Reel (TR)

Engineering Selection Recommendations

All three substitute parts (AT45DB021E-MHN-T, AT45DB021E-MHN-Y, AT45DB021E-MHN2B-T) are functionally equivalent to the AT45DB021D-MH-T and are suitable for direct replacement in applications requiring 2Mbit SPI FLASH memory in an 8-UDFN package.

Selection based on product status and compliance:

All substitute parts carry Active product status, ensuring long-term availability and manufacturing support.
All substitute parts are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.
All substitute parts feature improved moisture sensitivity (MSL 1 vs. MSL 3), reducing handling and storage constraints.

Selection based on packaging requirements:

AT45DB021E-MHN-T: Tape & Reel (TR) packaging for automated assembly processes.
AT45DB021E-MHN-Y: Tray packaging for manual or semi-automated assembly.
AT45DB021E-MHN2B-T: Tape & Reel (TR) packaging, alternative to AT45DB021E-MHN-T.

Choose the substitute part based on your assembly process requirements and packaging compatibility with your production line.

Frequently Asked Questions (FAQ)

Q: Can AT45DB021E-MHN-T, AT45DB021E-MHN-Y, or AT45DB021E-MHN2B-T be used as direct replacements for AT45DB021D-MH-T?

A: Yes. All three parts maintain identical memory capacity (2Mbit), memory organization (264 Bytes x 1024 pages), SPI interface, package type (8-UDFN Exposed Pad 5x6), and operating temperature range (-40°C ~ 85°C). The substitute parts offer improved specifications including higher clock frequency (70 MHz vs. 66 MHz) and extended voltage supply range (1.65V ~ 3.6V vs. 2.7V ~ 3.6V), making them fully compatible for direct replacement.

Q: What is the difference between the three substitute parts?

A: The three substitute parts are electrically identical. The differences are in packaging format: AT45DB021E-MHN-T and AT45DB021E-MHN2B-T are supplied in Tape & Reel (TR) format for automated assembly, while AT45DB021E-MHN-Y is supplied in Tray format for manual or semi-automated assembly. Select based on your production assembly process.

Q: Why is the AT45DB021D-MH-T classified as obsolete?

A: The AT45DB021D-MH-T has been superseded by the AT45DB021E series, which offers improved performance specifications and enhanced compliance certifications. Renesas Electronics Corporation recommends transitioning to the active AT45DB021E variants for new designs and ongoing production.

Q: Are there any electrical differences that would affect circuit design?

A: The substitute parts operate within a wider voltage supply range (1.65V ~ 3.6V vs. 2.7V ~ 3.6V) and feature faster page write cycle time (3ms vs. 4ms). These are improvements that enhance system flexibility and performance. No circuit redesign is required for direct replacement.

Q: What is the significance of the MSL (Moisture Sensitivity Level) difference?

A: The AT45DB021D-MH-T has MSL 3 (168 hours), requiring controlled storage and handling conditions. The substitute parts have MSL 1 (Unlimited), eliminating moisture sensitivity constraints and reducing storage and handling complexity during manufacturing and assembly.

Q: Are the substitute parts RoHS compliant?

A: Yes. All three substitute parts (AT45DB021E-MHN-T, AT45DB021E-MHN-Y, AT45DB021E-MHN2B-T) are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements for electronic components.

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