AT45DB161E-SHF2B-T Equivalent & Substitute Parts

Part Overview

The AT45DB161E-SHF2B-T is a 16Mbit Serial Peripheral Interface (SPI) FLASH memory device manufactured by Renesas Electronics Corporation. This non-volatile memory IC operates at 85 MHz and is housed in an 8-SOIC surface mount package. The device is actively produced and widely used in embedded systems requiring reliable data storage with SPI interface compatibility. Substitute parts are identified to provide design flexibility when the primary part number becomes unavailable or when design requirements necessitate alternative memory configurations.

Substiute Parts

AT45DB161E-SHF2B-T

Renesas Electronics CorporationIn Stock: 126186AT45DB161E-SHF2B-T Datasheet

Current PartRFQ

AT45DQ161-SHFHD-T

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT45DB161E-SHF2B-T is determined by the following critical parameters:

• Memory Capacity: 16Mbit (fixed requirement)
• Package Type: 8-SOIC form factor with identical physical dimensions (0.209", 5.30mm Width)
• Voltage Supply Range: 2.3V ~ 3.6V (compatible operating voltage)
• Mounting Type: Surface Mount
• Interface Compatibility: SPI or SPI-compatible protocols (including Quad I/O variants)
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The AT45DQ161-SHFHD-T qualifies as a substitute because it maintains identical memory capacity, package configuration, voltage specifications, and regulatory compliance. The primary distinction is the enhanced memory interface (SPI - Quad I/O) and extended operating temperature range, which represent functional improvements rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

Both the AT45DB161E-SHF2B-T and AT45DQ161-SHFHD-T are active products from Renesas Electronics Corporation with full ROHS3 compliance and REACH unaffected status. Selection between these parts depends on application-specific requirements:

The AT45DB161E-SHF2B-T is appropriate for applications requiring standard SPI interface operation within the -40°C to 85°C temperature range.

The AT45DQ161-SHFHD-T is suitable for applications requiring Quad I/O interface capability or extended operating temperature performance up to 105°C. The Quad I/O interface enables higher data throughput when the system controller supports this protocol variant. The memory organization difference (528 Bytes versus 512 Bytes per page) reflects the Quad I/O variant's configuration and does not affect functional compatibility in standard SPI mode operation.

Both devices maintain identical supply voltage specifications (2.3V ~ 3.6V) and identical package footprints, ensuring direct physical and electrical compatibility within the specified operating parameters.

Frequently Asked Questions (FAQ)

Q: Can the AT45DQ161-SHFHD-T directly replace the AT45DB161E-SHF2B-T in existing designs?

A: Yes, the AT45DQ161-SHFHD-T is physically and electrically compatible. Both devices use the 8-SOIC package with identical dimensions and pin configuration. The AT45DQ161-SHFHD-T operates in standard SPI mode when Quad I/O functionality is not utilized, ensuring backward compatibility.

Q: What is the difference between SPI and SPI - Quad I/O interfaces?

A: SPI - Quad I/O is an enhanced protocol variant that uses four data lines instead of one, enabling higher data transfer rates. Devices supporting Quad I/O remain compatible with standard SPI operation when configured in single-line mode.

Q: Are there voltage or temperature considerations when substituting these parts?

A: Both parts operate within the identical voltage range (2.3V ~ 3.6V). The AT45DQ161-SHFHD-T supports an extended temperature range (-40°C ~ 105°C) compared to the AT45DB161E-SHF2B-T (-40°C ~ 85°C). This represents an advantage for high-temperature applications.

Q: Do these parts have identical memory organization?

A: The AT45DB161E-SHF2B-T uses 512 Bytes x 4096 pages, while the AT45DQ161-SHFHD-T uses 528 Bytes x 4096 pages. Both devices store 16Mbit total capacity. The page size difference reflects the Quad I/O variant's internal configuration and does not affect standard SPI operation.

Q: Are both parts RoHS compliant?

A: Yes, both the AT45DB161E-SHF2B-T and AT45DQ161-SHFHD-T are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.