AT45DB161E-SHD-T Equivalent & Substitute Parts

Part Overview

The AT45DB161E-SHD-T is a 16Mbit FLASH memory IC with SPI interface operating at 85 MHz, manufactured by Renesas Electronics Corporation in 8-SOIC surface mount packaging. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary for ongoing system support, legacy product maintenance, and design continuity where existing designs cannot be modified.

Substiute Parts

AT45DB161E-SHD-T

Renesas Electronics CorporationIn Stock: 36243AT45DB161E-SHD-T Datasheet

Current PartRFQ

AT45DB161E-SHF-T

Renesas Electronics CorporationIn Stock: 1951AT45DB161E-SHF-T Datasheet

MFR RecommendedRFQ

AT45DB161E-SHFHA-T

Renesas Electronics CorporationIn Stock: 2104AT45DB161E-SHFHA-T Datasheet

MFR RecommendedRFQ

AT45DB161E-SHFHC-T

Renesas Electronics CorporationIn Stock: 1187AT45DB161E-SHFHC-T Datasheet

MFR RecommendedRFQ

AT45DQ161-SHF-B

Renesas Electronics CorporationIn Stock: 1104AT45DQ161-SHF-B Datasheet

MFR RecommendedRFQ

AT45DQ161-SHFHD-T

Renesas Electronics CorporationIn Stock: 3190AT45DQ161-SHFHD-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT45DB161E-SHD-T is determined by the following critical parameters: 16Mbit memory capacity, FLASH technology, SPI interface compatibility, 85 MHz clock frequency, 8-SOIC package, and surface mount configuration. All substitute parts maintain these core specifications.

Substitute parts are grouped into two categories based on memory interface capability:

Category 1: SPI Interface (Direct Substitutes) Parts maintaining standard SPI interface: AT45DB161E-SHF-T, AT45DB161E-SHFHA-T, AT45DB161E-SHFHC-T. These parts are electrically and mechanically interchangeable with the main part.

Category 2: SPI - Quad I/O Interface (Enhanced Substitutes) Parts with extended SPI - Quad I/O capability: AT45DQ161-SHF-B, AT45DQ161-SHFHD-T. These parts support both standard SPI and Quad I/O modes, providing backward compatibility with SPI-only designs while offering enhanced performance capability.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (SPI Interface Required)

AT45DB161E-SHF-T, AT45DB161E-SHFHA-T, and AT45DB161E-SHFHC-T are active production parts suitable for direct substitution. All three maintain SPI interface compatibility, identical memory capacity, and matching clock frequency. The primary differences are packaging format (Cut Tape vs. Tape & Reel) and supply voltage range expansion (2.3V minimum vs. 2.5V minimum). All substitute parts are ROHS3 compliant and REACH unaffected, matching the original part's compliance status.

For Enhanced Performance (SPI - Quad I/O Interface)

AT45DQ161-SHF-B and AT45DQ161-SHFHD-T provide extended operating temperature range (-40°C to 105°C vs. -40°C to 85°C) and Quad I/O capability while maintaining backward SPI compatibility. Page write cycle time increases from 4ms to 6ms. These parts are suitable for applications requiring extended temperature operation or where Quad I/O performance enhancement is beneficial. Both are active production parts with full compliance certifications.

Compliance and Regulatory Considerations

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH unaffected status, ensuring regulatory equivalence with the original AT45DB161E-SHD-T.

Frequently Asked Questions (FAQ)

Q: Can AT45DB161E-SHF-T directly replace AT45DB161E-SHD-T in existing designs?

A: Yes. AT45DB161E-SHF-T is a direct functional equivalent with identical memory capacity, SPI interface, clock frequency, and 8-SOIC package. The lower minimum supply voltage (2.3V vs. 2.5V) provides additional design margin. Both parts are ROHS3 compliant.

Q: What is the difference between AT45DB161E and AT45DQ161 series?

A: AT45DB161E parts support standard SPI interface only. AT45DQ161 parts support both SPI and Quad I/O interfaces, enabling higher data throughput in Quad mode while maintaining backward SPI compatibility. Both maintain 16Mbit capacity and 85 MHz clock frequency.

Q: Are AT45DQ161 parts backward compatible with AT45DB161E designs?

A: Yes. AT45DQ161-SHF-B and AT45DQ161-SHFHD-T operate in standard SPI mode when Quad I/O is not enabled, providing full functional compatibility with existing AT45DB161E firmware and hardware interfaces.

Q: What is the significance of the packaging suffix (SHF-T vs. SHFHC-T)?

A: The suffix indicates packaging format. SHF-T denotes Cut Tape & Digi-Reel packaging suitable for automated pick-and-place assembly. SHFHC-T denotes Tape & Reel format. Both are surface mount 8-SOIC packages with identical electrical specifications.

Q: Why does AT45DQ161-SHF-B have a higher operating temperature range?

A: AT45DQ161-SHF-B supports -40°C to 105°C operation compared to -40°C to 85°C for AT45DB161E variants. This extended range is a characteristic of the DQ161 series and may reflect enhanced thermal design or qualification testing.

Q: Is the 2ms difference in page write cycle time (4ms vs. 6ms) significant for substitution?

A: The page write cycle time difference applies only to AT45DQ161 parts (6ms vs. 4ms for AT45DB161E). This affects bulk write performance but does not impact functional compatibility. Applications with strict write timing requirements should account for this difference.

Q: Are all substitute parts currently in active production?

A: AT45DB161E-SHF-T, AT45DB161E-SHFHA-T, AT45DB161E-SHFHC-T, AT45DQ161-SHF-B, and AT45DQ161-SHFHD-T are all classified as Active production parts. The original AT45DB161E-SHD-T is classified as "Not For New Designs," making these substitutes the recommended choices for ongoing production.