AT45DB161E-SSHD-T Equivalent & Substitute Parts

Part Overview

The AT45DB161E-SSHD-T is a 16Mbit Serial Peripheral Interface (SPI) FLASH memory IC manufactured by Renesas Electronics Corporation, packaged in 8-SOIC form factor with 85 MHz clock frequency. This part is classified as Not For New Designs, indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary to support existing designs, ensure supply chain continuity, and transition to active product alternatives that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Memory Size	16Mbit
Memory Format	FLASH
Memory Interface	SPI
Clock Frequency	85 MHz
Memory Organization	528 Bytes x 4096 pages
Voltage Supply Range	2.5V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Write Cycle Time (Word, Page)	8µs, 4ms
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the AT45DB161E-SSHD-T are grouped into two categories based on memory interface compatibility:

Category 1: SPI Interface (Direct Substitutes) Parts maintaining standard SPI interface with identical memory capacity, organization, and electrical characteristics. These parts are electrically interchangeable with the original design. Key parameters for substitution: 16Mbit capacity, SPI interface, 85 MHz clock frequency, 8-SOIC package, -40°C to 85°C operating temperature range, and 2.3V to 3.6V supply voltage range.

Category 2: SPI - Quad I/O Interface (Enhanced Substitutes) Parts featuring extended SPI - Quad I/O interface capability while maintaining backward compatibility with standard SPI operation. These parts support the same memory capacity and organization but offer additional interface flexibility. Key parameters: 16Mbit capacity, SPI - Quad I/O interface, 85 MHz clock frequency, 8-SOIC package, and 2.3V to 3.6V supply voltage range.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Memory Interface	Clock Frequency	Voltage Supply	Operating Temperature	Package	Product Status	Packaging Type
AT45DB161E-SSHD-T	Renesas Electronics	16Mbit	SPI	85 MHz	2.5V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Not For New Designs	Cut Tape (CT) & Digi-Reel®
AT45DB161E-SSHF-B	Renesas Electronics	16Mbit	SPI	85 MHz	2.3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	Bulk
AT45DB161E-SSHF-T	Renesas Electronics	16Mbit	SPI	85 MHz	2.3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	Cut Tape (CT) & Digi-Reel®
AT45DB161E-SSHFHA-T	Renesas Electronics	16Mbit	SPI	85 MHz	2.3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	Cut Tape (CT) & Digi-Reel®
AT45DB161E-SSHFHC-T	Renesas Electronics	16Mbit	SPI	85 MHz	2.3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	Tape & Reel (TR)
AT45DQ161-SSHF-B	Renesas Electronics	16Mbit	SPI - Quad I/O	85 MHz	2.3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	Tube
AT45DQ161-SSHF-T	Renesas Electronics	16Mbit	SPI - Quad I/O	85 MHz	2.3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	Active	Tape & Reel (TR)
AT45DQ161-SSHFHD-T	Renesas Electronics	16Mbit	SPI - Quad I/O	85 MHz	2.3V ~ 3.6V	-40°C ~ 105°C	8-SOIC	Active	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct SPI Substitution: AT45DB161E-SSHF-T is the primary recommended substitute. This part maintains identical SPI interface, memory capacity, and operating temperature range while offering Active product status. The extended supply voltage range (2.3V to 3.6V) provides improved compatibility with lower voltage systems compared to the original 2.5V minimum. Cut Tape & Digi-Reel® packaging matches the original part's distribution format.

For Bulk Procurement: AT45DB161E-SSHF-B provides the same electrical specifications in Bulk packaging, suitable for high-volume manufacturing environments where tape and reel handling is not required.

For Extended Temperature Applications: AT45DQ161-SSHFHD-T extends the operating temperature range to -40°C to 105°C while maintaining 16Mbit capacity and 85 MHz performance. This part requires design verification to confirm SPI - Quad I/O interface compatibility with existing firmware and hardware implementations.

For Tape & Reel Distribution: AT45DB161E-SSHFHC-T and AT45DQ161-SSHF-T both support Tape & Reel packaging for automated assembly processes. AT45DB161E-SSHFHC-T maintains standard SPI interface, while AT45DQ161-SSHF-T offers Quad I/O capability.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical 8-SOIC package dimensions, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can AT45DQ161 parts replace AT45DB161E parts directly without firmware changes? A: AT45DQ161 parts support SPI - Quad I/O interface, which is backward compatible with standard SPI operation. However, firmware verification is required to confirm that existing SPI command sequences execute correctly on the enhanced interface variant.

Q: What is the difference between packaging types (Cut Tape, Bulk, Tube, Tape & Reel)? A: Packaging type affects distribution and assembly handling. Cut Tape & Digi-Reel® and Tape & Reel are suitable for automated pick-and-place assembly. Bulk packaging is used for manual assembly or high-volume tape feeding. Tube packaging is used for manual component handling. Electrical performance is identical across all packaging variants.

Q: Is the supply voltage range difference (2.5V vs 2.3V minimum) significant? A: The extended 2.3V minimum on substitute parts provides improved compatibility with 3.3V and lower voltage systems. The original 2.5V minimum is a subset of the 2.3V specification, so substitutes are compatible with designs using the original part's voltage range.

Q: Why does AT45DQ161-SSHFHD-T have a higher operating temperature maximum (105°C vs 85°C)? A: AT45DQ161-SSHFHD-T is qualified for extended temperature operation. This part is suitable for industrial and automotive applications requiring higher temperature tolerance. Standard temperature variants (-40°C to 85°C) are available for general-purpose applications.

Q: Are all substitute parts ROHS3 compliant? A: Yes, all listed substitute parts maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating, matching the original part's environmental and regulatory certifications.

Q: What is the significance of DiGi-Electronics Programmable verification status? A: DiGi-Electronics Programmable verification indicates whether the part has been tested and verified for programming compatibility with DiGi-Electronics tools and processes. Parts marked "Not Verified" may still be functionally compatible but have not undergone this specific verification process.

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