AT45DB161D-SU Equivalent & Substitute Parts

Part Overview

The AT45DB161D-SU is a 16Mbit Serial Peripheral Interface (SPI) FLASH memory IC manufactured by Microchip Technology in an 8-SOIC package. This device is classified as obsolete, making substitute parts necessary for new procurement and ongoing system support. The part operates across a supply voltage range of 2.7V to 3.6V with a maximum clock frequency of 66 MHz and is suitable for applications requiring non-volatile data storage with SPI interface compatibility.

Substiute Parts

AT45DB161D-SU

Microchip TechnologyIn Stock: 15406AT45DB161D-SU Datasheet

Current PartRFQ

AT45DB161E-SHF-B

Renesas Electronics CorporationIn Stock: 20437AT45DB161E-SHF-B Datasheet

MFR RecommendedRFQ

AT45DB161E-SSHD-T

Renesas Electronics CorporationIn Stock: 82046AT45DB161E-SSHD-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT45DB161D-SU is determined by the following critical parameters:

• Memory Capacity: 16Mbit (non-negotiable)
• Memory Interface: SPI protocol compatibility
• Memory Organization: 528 Bytes x 4096 pages (functional equivalence)
• Package Type: 8-SOIC form factor
• Operating Temperature Range: -40°C ~ 85°C
• Supply Voltage Compatibility: Overlap within specified ranges
• RoHS Compliance: ROHS3 Compliant status

The identified substitute parts maintain these core parameters while offering enhanced performance characteristics (higher clock frequency) and improved product status for new designs.

Parameter Comparison

Engineering Selection Recommendations

AT45DB161E-SHF-B is the primary substitute for new designs. This part maintains active product status with Renesas Electronics Corporation, ensuring long-term availability and supply chain stability. It provides enhanced performance with 85 MHz clock frequency and reduced page write cycle time (4ms versus 6ms), while maintaining full compatibility with the core functional parameters of the AT45DB161D-SU. The supply voltage range of 2.3V to 3.6V encompasses the original specification, and the package dimensions remain identical at 0.209" width.

AT45DB161E-SSHD-T serves as an alternative substitute with higher inventory availability. However, this part carries a "Not For New Designs" status, making it suitable only for legacy system maintenance and replacement applications. The package width differs at 0.154" (3.90mm) compared to the original 0.209" (5.30mm), requiring physical layout verification before implementation. The minimum supply voltage is 2.5V, which is higher than the original 2.7V specification.

Frequently Asked Questions (FAQ)

Q: Can AT45DB161E-SHF-B be used as a direct replacement for AT45DB161D-SU?

A: Yes. Both parts share identical memory capacity (16Mbit), memory organization (528 Bytes x 4096 pages), SPI interface, and 8-SOIC package dimensions (0.209" width). The supply voltage range of AT45DB161E-SHF-B (2.3V ~ 3.6V) fully encompasses the original specification (2.7V ~ 3.6V). The higher clock frequency (85 MHz versus 66 MHz) and faster page write cycle (4ms versus 6ms) represent performance improvements with no functional incompatibility.

Q: What is the difference between AT45DB161E-SHF-B and AT45DB161E-SSHD-T?

A: Both parts provide identical memory specifications and SPI interface compatibility. The primary differences are: (1) Product Status—AT45DB161E-SHF-B is Active while AT45DB161E-SSHD-T is Not For New Designs; (2) Package width—AT45DB161E-SHF-B measures 0.209" (5.30mm) matching the original, while AT45DB161E-SSHD-T measures 0.154" (3.90mm); (3) Minimum supply voltage—AT45DB161E-SHF-B operates from 2.3V while AT45DB161E-SSHD-T requires 2.5V minimum.

Q: Are there package compatibility concerns with these substitutes?

A: AT45DB161E-SHF-B maintains identical package dimensions to the original AT45DB161D-SU (8-SOIC, 0.209" width), ensuring direct PCB compatibility. AT45DB161E-SSHD-T uses a narrower 8-SOIC package (0.154" width), which may require PCB layout modifications depending on pad spacing and component placement constraints.

Q: Do these substitutes maintain RoHS compliance?

A: Yes. Both AT45DB161E-SHF-B and AT45DB161E-SSHD-T are ROHS3 Compliant, matching the compliance status of the original AT45DB161D-SU.

Q: What is the significance of the "Not For New Designs" status on AT45DB161E-SSHD-T?

A: This designation indicates the part is available for existing system support and replacement applications but should not be selected for new product development. For new designs, AT45DB161E-SHF-B with Active status is the recommended choice to ensure long-term supply availability and manufacturer support.