AT45DB161E-MHD2B-T Equivalent & Substitute Parts

Part Overview

The AT45DB161E-MHD2B-T is a 16Mbit Serial Peripheral Interface (SPI) FLASH memory IC manufactured by Renesas Electronics Corporation, housed in an 8-UDFN (5x6) surface mount package. This device operates at 85 MHz with a supply voltage range of 2.5V to 3.6V and supports operating temperatures from -40°C to 85°C. The part is classified as Not For New Designs, indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance.

Substiute Parts

AT45DB161E-MHD2B-T

Renesas Electronics CorporationIn Stock: 2242AT45DB161E-MHD2B-T Datasheet

Current PartRFQ

AT45DB161E-MHF2B-T

Renesas Electronics CorporationIn Stock: 28012AT45DB161E-MHF2B-T Datasheet

MFR RecommendedRFQ

AT45DQ161-MHF2B-T

Renesas Electronics CorporationIn Stock: 797AT45DQ161-MHF2B-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT45DB161E-MHD2B-T is determined by the following critical parameters:

• Memory capacity: 16Mbit
• Memory interface protocol: SPI (Serial Peripheral Interface)
• Package type: 8-UDFN Exposed Pad (5x6)
• Clock frequency: 85 MHz
• Memory organization: 512 Bytes x 4096 pages
• Operating temperature range: -40°C to 85°C
• Mounting type: Surface Mount

Two substitute parts meet these criteria with allowable variations in supply voltage range and interface capabilities:

1. AT45DB161E-MHF2B-T — Direct functional equivalent with expanded voltage range (2.3V ~ 3.6V) and Active product status
2. AT45DQ161-MHF2B-T — Enhanced variant supporting SPI and Quad I/O interface modes with expanded voltage range (2.3V ~ 3.6V) and Active product status

Parameter Comparison

Engineering Selection Recommendations

AT45DB161E-MHF2B-T is the primary recommended substitute for direct replacement. This part maintains identical electrical and mechanical specifications to the AT45DB161E-MHD2B-T while offering Active product status, ensuring continued availability and manufacturing support. The expanded voltage supply range (2.3V ~ 3.6V) provides additional design flexibility. Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

AT45DQ161-MHF2B-T serves as an alternative substitute when Quad I/O interface capability is required or beneficial for system performance. This part supports both standard SPI and Quad I/O modes, enabling higher data throughput in applications that implement Quad I/O protocols. The page write cycle time increases to 6ms compared to 4ms in the standard SPI variant. This part is also Active and fully compliant with RoHS3 and REACH standards.

Selection between AT45DB161E-MHF2B-T and AT45DQ161-MHF2B-T depends on interface protocol requirements and application performance needs. Both are suitable for legacy system support and new production runs requiring this memory capacity and package type.

Frequently Asked Questions (FAQ)

Q: Can AT45DB161E-MHF2B-T be used as a direct drop-in replacement for AT45DB161E-MHD2B-T?

A: Yes. Both parts share identical memory capacity (16Mbit), interface protocol (SPI), clock frequency (85 MHz), package type (8-UDFN Exposed Pad 5x6), and operating temperature range (-40°C to 85°C). The AT45DB161E-MHF2B-T features an expanded voltage supply range (2.3V ~ 3.6V) compared to the original part (2.5V ~ 3.6V), making it compatible with a broader range of power supply designs.

Q: What is the difference between AT45DB161E-MHF2B-T and AT45DQ161-MHF2B-T?

A: The primary difference is the memory interface capability. AT45DB161E-MHF2B-T supports standard SPI interface only, while AT45DQ161-MHF2B-T supports both SPI and Quad I/O modes. The AT45DQ161-MHF2B-T has a slightly longer page write cycle time (6ms versus 4ms). Both parts are electrically and mechanically compatible with the original AT45DB161E-MHD2B-T in terms of package, memory capacity, and operating conditions.

Q: Are all three parts available in the same packaging?

A: Yes. All three parts use the 8-UDFN Exposed Pad package with dimensions of 5x6mm, suitable for surface mount assembly. No PCB layout modifications are required when substituting between these parts.

Q: What compliance certifications apply to the substitute parts?

A: Both substitute parts (AT45DB161E-MHF2B-T and AT45DQ161-MHF2B-T) are ROHS3 compliant and REACH unaffected. Moisture Sensitivity Level is 1 (Unlimited) for both parts, indicating no special moisture handling requirements during storage or assembly.

Q: Why is the original AT45DB161E-MHD2B-T marked as Not For New Designs?

A: This designation indicates the part has reached end-of-life status and is no longer recommended for new product development. The substitute parts AT45DB161E-MHF2B-T and AT45DQ161-MHF2B-T are Active products with ongoing manufacturing support and are the recommended choices for both legacy system maintenance and new designs.

Q: Can I use AT45DQ161-MHF2B-T in a design that only requires standard SPI operation?

A: Yes. The AT45DQ161-MHF2B-T is backward compatible with standard SPI protocols. Designs using only SPI mode will operate correctly with this part. The Quad I/O capability is optional and does not interfere with standard SPI operation.