AT45DB161E-SHD2B-T Equivalent & Substitute Parts

Part Overview

The AT45DB161E-SHD2B-T is a 16Mbit FLASH memory IC manufactured by Renesas Electronics Corporation, featuring SPI interface operation at 85 MHz. This device is packaged in 8-SOIC and supplied in Cut Tape format. The part is classified as Not For New Designs, making identification of functionally equivalent alternatives essential for ongoing production support and design flexibility.

Key Parameters

Parameter	Value
Memory Size	16Mbit
Memory Format	FLASH
Memory Interface	SPI
Clock Frequency	85 MHz
Memory Organization	512 Bytes x 4096 pages
Voltage Supply Range	2.5V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.209", 5.30mm Width)
Write Cycle Time (Word, Page)	8µs, 4ms
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters: memory size (16Mbit), memory format (FLASH), package type (8-SOIC), and physical dimensions (0.209", 5.30mm Width). All substitute parts maintain these core specifications.

The substitute parts are grouped into two categories based on interface capability:

Category 1: SPI Interface (Direct Functional Equivalent)

AT45DB161E-SHF2B-T: Maintains identical SPI interface with expanded voltage supply range (2.3V ~ 3.6V) and Active product status. Packaging differs to Tape & Reel format.

Category 2: SPI - Quad I/O Interface (Enhanced Interface Capability)

AT45DQ161-SHFHB-T and AT45DQ161-SHFHD-T: Provide SPI - Quad I/O interface with extended operating temperature range (-40°C ~ 105°C) and Active product status. These parts support quad I/O operations while maintaining backward compatibility with standard SPI mode.

Parameter Comparison

Parameter	AT45DB161E-SHD2B-T (Main)	AT45DB161E-SHF2B-T	AT45DQ161-SHFHB-T	AT45DQ161-SHFHD-T
Memory Size	16Mbit	16Mbit	16Mbit	16Mbit
Memory Format	FLASH	FLASH	FLASH	FLASH
Memory Interface	SPI	SPI	SPI - Quad I/O	SPI - Quad I/O
Clock Frequency	85 MHz	85 MHz	85 MHz	85 MHz
Memory Organization	512 Bytes x 4096 pages	512 Bytes x 4096 pages	512 Bytes x 4096 pages	528 Bytes x 4096 pages
Voltage Supply Range	2.5V ~ 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 ~ 105°C	-40°C ~ 105°C
Package / Case	8-SOIC (0.209", 5.30mm Width)	8-SOIC (0.209", 5.30mm Width)	8-SOIC (0.209", 5.30mm Width)	8-SOIC (0.209", 5.30mm Width)
Write Cycle Time (Word, Page)	8µs, 4ms	8µs, 4ms	8µs, 6ms	8µs, 6ms
Product Status	Not For New Designs	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (SPI Interface Required): Select AT45DB161E-SHF2B-T when the application requires standard SPI interface operation identical to the AT45DB161E-SHD2B-T. This part is Active status and maintains all electrical and thermal specifications. The primary difference is packaging format (Tape & Reel versus Cut Tape) and expanded lower voltage limit (2.3V minimum).

For Enhanced Capability (Quad I/O Interface Supported): Select AT45DQ161-SHFHB-T or AT45DQ161-SHFHD-T when the application circuit supports SPI - Quad I/O interface and requires extended operating temperature range to 105°C. Both parts are Active status and ROHS3 compliant. The distinction between these two parts is memory organization (512 Bytes versus 528 Bytes per page) and page write cycle time (6ms for both).

All substitute parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory alignment with the original part.

Frequently Asked Questions (FAQ)

Q: Can AT45DB161E-SHF2B-T directly replace AT45DB161E-SHD2B-T in existing designs? A: Yes. Both parts maintain identical SPI interface, memory size (16Mbit), clock frequency (85 MHz), and package dimensions (8-SOIC). The voltage supply range of AT45DB161E-SHF2B-T (2.3V ~ 3.6V) encompasses the original part's range (2.5V ~ 3.6V). Packaging format differs (Tape & Reel versus Cut Tape), but electrical performance is equivalent.

Q: What is the primary difference between AT45DB161E-SHF2B-T and AT45DQ161 series parts? A: AT45DB161E-SHF2B-T operates exclusively in SPI mode. AT45DQ161-SHFHB-T and AT45DQ161-SHFHD-T support both SPI and SPI - Quad I/O modes, enabling higher data throughput when the application circuit implements quad I/O signaling. Standard SPI operation remains available on quad I/O parts for backward compatibility.

Q: Are there differences between AT45DQ161-SHFHB-T and AT45DQ161-SHFHD-T? A: Both parts share identical electrical specifications and operating temperature range (-40°C ~ 105°C). The difference is memory organization: AT45DQ161-SHFHB-T uses 512 Bytes x 4096 pages, while AT45DQ161-SHFHD-T uses 528 Bytes x 4096 pages. Page write cycle time is 6ms for both.

Q: Does the extended temperature range of AT45DQ161 parts affect compatibility? A: The extended operating temperature range (-40°C ~ 105°C) on AT45DQ161 parts is a superset of the original part's range (-40°C ~ 85°C). This provides additional thermal margin and does not reduce compatibility. Applications operating within -40°C ~ 85°C experience no functional difference.

Q: What packaging considerations apply when substituting parts? A: AT45DB161E-SHD2B-T is supplied in Cut Tape format. Substitute parts AT45DB161E-SHF2B-T, AT45DQ161-SHFHB-T, and AT45DQ161-SHFHD-T are supplied in Tape & Reel format. All parts use identical 8-SOIC package with 0.209" width and 5.30mm dimensions, ensuring PCB footprint compatibility. Packaging format affects handling and automated assembly processes but not electrical or mechanical fit.

Q: Are all substitute parts RoHS compliant? A: Yes. The main part AT45DB161E-SHD2B-T and all substitute parts (AT45DB161E-SHF2B-T, AT45DQ161-SHFHB-T, AT45DQ161-SHFHD-T) are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements.

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