AT45DB011D-MH-T Equivalent & Substitute Parts

Part Overview

The AT45DB011D-MH-T is a 1Mbit FLASH memory IC manufactured by Renesas Electronics Corporation, featuring SPI interface operation at 66 MHz with 8-UDFN (5x6) surface mount packaging. This device is classified as obsolete, necessitating identification of equivalent substitute components for new designs and production continuity. The part operates across a 2.7V to 3.6V supply voltage range and supports industrial temperature specifications from -40°C to 85°C.

Key Parameters

Parameter	Value
Memory Size	1Mbit
Memory Format	FLASH
Memory Interface	SPI
Clock Frequency	66 MHz
Memory Organization	264 Bytes x 512 pages
Write Cycle Time (Page)	4ms
Voltage Supply Range	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package Type	8-UDFN Exposed Pad (5x6)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the AT45DB011D-MH-T is determined by the following critical parameters:

Package Compatibility: Both parts must use 8-UDFN (5x6) Exposed Pad surface mount packaging to ensure PCB layout and assembly compatibility
Memory Interface: SPI interface requirement is maintained across all substitutes
Operating Temperature Range: -40°C to 85°C specification must be met or exceeded
Supply Voltage Compatibility: Substitute voltage ranges must encompass or be compatible with the original 2.7V ~ 3.6V specification
Mounting Type: Surface mount technology consistency is required

The AT45DB021E-MHN-T qualifies as a direct substitute based on identical package geometry, matching SPI interface, compatible temperature range, and overlapping voltage specifications. The substitute provides increased memory capacity (2Mbit) and higher clock frequency (70 MHz) while maintaining electrical and mechanical compatibility.

Parameter Comparison

Parameter	AT45DB011D-MH-T	AT45DB021E-MHN-T
Manufacturer	Renesas Electronics Corporation	Renesas Electronics Corporation
Memory Size	1Mbit	2Mbit
Memory Format	FLASH	FLASH
Memory Interface	SPI	SPI
Clock Frequency	66 MHz	70 MHz
Memory Organization	264 Bytes x 512 pages	264 Bytes x 1024 pages
Write Cycle Time (Page)	4ms	3ms
Voltage Supply Range	2.7V ~ 3.6V	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-UDFN Exposed Pad (5x6)	8-UDFN Exposed Pad (5x6)
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Status	Not specified	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The AT45DB021E-MHN-T is the qualified substitute for the obsolete AT45DB011D-MH-T based on the following factors:

Product Status: The substitute is Active, ensuring long-term availability and manufacturing support, whereas the original part is Obsolete
Regulatory Compliance: The AT45DB021E-MHN-T carries ROHS3 Compliant certification, meeting current environmental and regulatory requirements
Electrical Compatibility: The substitute's voltage supply range (1.65V ~ 3.6V) encompasses the original specification (2.7V ~ 3.6V), ensuring drop-in compatibility in existing circuits
Package Equivalence: Identical 8-UDFN (5x6) Exposed Pad packaging maintains PCB layout compatibility without redesign
Interface Compatibility: SPI interface and operating temperature range (-40°C ~ 85°C) are identical, ensuring firmware and thermal performance compatibility
Performance Enhancement: The substitute provides increased memory capacity (2Mbit vs 1Mbit) and faster page write cycle time (3ms vs 4ms), offering performance improvement without functional degradation

Frequently Asked Questions (FAQ)

Q: Can the AT45DB021E-MHN-T be used as a direct replacement for the AT45DB011D-MH-T?

A: Yes. Both parts share identical 8-UDFN (5x6) package geometry, SPI interface, and operating temperature range. The substitute's voltage range encompasses the original specification, and firmware compatibility is maintained through identical SPI protocol implementation.

Q: What are the key differences between these parts?

A: The AT45DB021E-MHN-T provides double the memory capacity (2Mbit vs 1Mbit), operates at a higher clock frequency (70 MHz vs 66 MHz), and features faster page write cycle time (3ms vs 4ms). The substitute is Active status with ROHS3 compliance, whereas the original is Obsolete.

Q: Are there any voltage compatibility concerns?

A: No. The substitute's supply voltage range (1.65V ~ 3.6V) fully encompasses the original part's range (2.7V ~ 3.6V). Circuits designed for the original part will operate correctly with the substitute at the same supply voltage.

Q: Does the package change require PCB redesign?

A: No. Both parts use identical 8-UDFN (5x6) Exposed Pad surface mount packaging. PCB layouts, footprints, and assembly processes remain unchanged.

Q: Is the SPI interface identical between these parts?

A: Yes. Both parts implement SPI interface protocol. Firmware and software drivers designed for the AT45DB011D-MH-T are compatible with the AT45DB021E-MHN-T without modification.

Q: What is the impact of increased memory capacity?

A: The AT45DB021E-MHN-T provides 2Mbit storage versus 1Mbit in the original part. Applications requiring only 1Mbit capacity will function identically. Applications requiring additional storage capacity can utilize the expanded memory without hardware changes.

Q: Are there moisture sensitivity or environmental compliance differences?

A: Both parts carry identical Moisture Sensitivity Level 1 (Unlimited) ratings. The substitute includes ROHS3 Compliant certification, meeting current environmental regulations. Both parts maintain REACH Unaffected status.

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