AT45DQ161-SH2B-T Equivalent & Substitute Parts

Part Overview

The AT45DQ161-SH2B-T is a 16Mbit FLASH memory IC manufactured by Renesas Electronics Corporation, featuring SPI with Quad I/O interface capability. This non-volatile memory device operates at 85 MHz and is housed in an 8-SOIC surface mount package. The part is currently active in production status with ROHS3 compliance and unlimited moisture sensitivity level rating.

Substitute parts are identified when electrical and mechanical parameters align within the allowed specifications for this memory IC category, enabling direct functional replacement in circuit designs.

Key Parameters

Parameter	Value
Memory Size	16Mbit
Memory Format	FLASH
Memory Interface	SPI - Quad I/O
Clock Frequency	85 MHz
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Voltage Supply Range	2.5V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AT45DQ161-SH2B-T is determined by the following critical parameters:

Memory capacity: 16Mbit
Memory interface type: SPI - Quad I/O capability
Package form factor: 8-SOIC with 3.90mm width
Surface mount compatibility
Operating frequency: 85 MHz
Supply voltage compatibility within specified ranges
RoHS3 compliance status
Product active status

Substitute parts must maintain identical memory size, interface protocol support, and physical package dimensions. Variations in supply voltage range, operating temperature range, memory organization, and write cycle timing are permitted when the core functional parameters remain equivalent.

Parameter Comparison

Parameter	AT45DQ161-SH2B-T	AT45DB161E-SSHF2B-T	AT45DQ161-SSHF2B-T	AT45DQ161-SSHFHB-T	AT45DQ161-SSHFHD-T
Memory Size	16Mbit	16Mbit	16Mbit	16Mbit	16Mbit
Memory Interface	SPI - Quad I/O	SPI	SPI - Quad I/O	SPI - Quad I/O	SPI - Quad I/O
Clock Frequency	85 MHz	85 MHz	85 MHz	85 MHz	85 MHz
Package / Case	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)
Voltage Supply Range	2.5V ~ 3.6V	2.3V ~ 3.6V	2.3V ~ 3.6V	2.3V ~ 3.6V	2.3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 105°C
Memory Organization	512 Bytes x 4096 pages	512 Bytes x 4096 pages	512 Bytes x 4096 pages	512 Bytes x 4096 pages	528 Bytes x 4096 pages
Write Cycle Time - Page	6ms	4ms	6ms	6ms	6ms
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain active production status with ROHS3 compliance certification, ensuring regulatory alignment with the original AT45DQ161-SH2B-T specification.

AT45DQ161-SSHF2B-T and AT45DQ161-SSHFHB-T preserve identical memory interface protocol (SPI - Quad I/O) and memory organization, providing direct functional equivalence with expanded supply voltage tolerance and extended operating temperature range in the SSHFHB-T variant.

AT45DQ161-SSHFHD-T maintains SPI - Quad I/O interface compatibility with extended temperature operation (-40°C ~ 105°C) and modified memory organization (528 Bytes x 4096 pages), suitable for applications requiring higher temperature performance.

AT45DB161E-SSHF2B-T operates with standard SPI interface (without Quad I/O capability) and reduced page write cycle time (4ms versus 6ms), representing a functional alternative only for designs not requiring Quad I/O protocol support.

Frequently Asked Questions (FAQ)

Q: Can AT45DB161E-SSHF2B-T replace AT45DQ161-SH2B-T in all applications?

A: AT45DB161E-SSHF2B-T supports standard SPI interface only, lacking Quad I/O capability present in the original part. Substitution is valid only for designs that do not utilize Quad I/O protocol features.

Q: What is the primary difference between AT45DQ161-SSHFHB-T and AT45DQ161-SSHFHD-T?

A: Both parts support SPI - Quad I/O interface and extended temperature operation (-40°C ~ 105°C). AT45DQ161-SSHFHD-T features modified memory organization (528 Bytes x 4096 pages) compared to the standard 512 Bytes x 4096 pages configuration.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts are housed in 8-SOIC surface mount packages with identical 3.90mm width dimensions, ensuring mechanical compatibility with the original AT45DQ161-SH2B-T footprint.

Q: What supply voltage considerations apply when selecting a substitute?

A: The original AT45DQ161-SH2B-T operates within 2.5V ~ 3.6V range. Substitute parts AT45DQ161-SSHF2B-T, AT45DQ161-SSHFHB-T, and AT45DQ161-SSHFHD-T support expanded range 2.3V ~ 3.6V, providing broader voltage compatibility. AT45DB161E-SSHF2B-T also supports 2.3V ~ 3.6V range.

Q: Do all substitute parts maintain identical write cycle performance?

A: Page write cycle time is 6ms for AT45DQ161-SH2B-T, AT45DQ161-SSHF2B-T, AT45DQ161-SSHFHB-T, and AT45DQ161-SSHFHD-T. AT45DB161E-SSHF2B-T features reduced page write cycle time of 4ms.

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