AT45DQ161-SSHD-B Equivalent & Substitute Parts

Part Overview

The AT45DQ161-SSHD-B is a 16Mbit FLASH memory IC manufactured by Renesas Electronics Corporation, featuring SPI with Quad I/O interface capability. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing production and maintenance applications. The part operates across a supply voltage range of 2.5V to 3.6V and supports clock frequencies up to 85 MHz, packaged in an 8-SOIC surface mount configuration.

Substiute Parts

AT45DQ161-SSHD-B

Renesas Electronics CorporationIn Stock: 936AT45DQ161-SSHD-B Datasheet

Current PartRFQ

AT45DB161E-SSHD-B

Renesas Electronics CorporationIn Stock: 1341AT45DB161E-SSHD-B Datasheet

MFR RecommendedRFQ

AT45DB161E-SSHF-B

Renesas Electronics CorporationIn Stock: 20644AT45DB161E-SSHF-B Datasheet

MFR RecommendedRFQ

AT45DB161E-SSHF-T

Renesas Electronics CorporationIn Stock: 3907AT45DB161E-SSHF-T Datasheet

MFR RecommendedRFQ

AT45DB161E-SSHFHA-T

Renesas Electronics CorporationIn Stock: 1556AT45DB161E-SSHFHA-T Datasheet

MFR RecommendedRFQ

AT45DB161E-SSHFHC-T

Renesas Electronics CorporationIn Stock: 96291AT45DB161E-SSHFHC-T Datasheet

MFR RecommendedRFQ

AT45DQ161-SSHFHD-T

Renesas Electronics CorporationIn Stock: 1251AT45DQ161-SSHFHD-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT45DQ161-SSHD-B is determined by the following critical parameters:

Interface Compatibility: The AT45DQ161-SSHD-B operates with SPI - Quad I/O interface. Substitute parts must maintain this interface specification or provide backward-compatible SPI operation.

Memory Specifications: All substitutes must match the 16Mbit capacity, 528 Bytes x 4096 pages organization, and 85 MHz clock frequency.

Electrical Parameters: Supply voltage range, write cycle timing, and operating temperature range define functional equivalence.

Package Conformance: All substitutes must use the 8-SOIC package format to ensure PCB compatibility without redesign.

Compliance Requirements: RoHS3 compliance and MSL Level 1 rating must be maintained.

Substitute parts are grouped into two categories:

Category A - SPI Interface (Standard): AT45DB161E variants with standard SPI interface. These parts provide full functional compatibility with identical memory capacity and timing specifications, with supply voltage extended to 2.3V minimum.

Category B - SPI/Quad I/O Interface (Enhanced): AT45DQ161-SSHFHD-T maintains the Quad I/O interface with extended operating temperature range to 105°C and extended supply voltage to 2.3V minimum.

Parameter Comparison

Engineering Selection Recommendations

For Quad I/O Interface Requirement: AT45DQ161-SSHFHD-T is the direct functional equivalent, maintaining SPI - Quad I/O interface compatibility. This part is Active status and provides extended operating temperature range to 105°C with extended supply voltage minimum of 2.3V. Page write cycle time matches the original specification at 6ms.

For Standard SPI Interface Applications: AT45DB161E variants provide full memory capacity and timing compatibility with Active product status. These parts operate with standard SPI interface and feature improved supply voltage range extending to 2.3V minimum. Page write cycle time is reduced to 4ms, providing performance improvement over the original specification.

Packaging and Availability Considerations: AT45DB161E-SSHFHC-T offers the highest inventory availability (96,202 units) in Tape & Reel packaging, suitable for high-volume production. AT45DB161E-SSHF-B provides bulk packaging with 20,626 units in stock for alternative procurement strategies.

Compliance Status: All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring regulatory and environmental requirement continuity.

Frequently Asked Questions (FAQ)

Q: Can AT45DB161E parts replace AT45DQ161-SSHD-B in existing designs?

A: AT45DB161E variants are functionally compatible for applications requiring standard SPI interface operation. They provide identical memory capacity, organization, and clock frequency. However, if the design specifically utilizes Quad I/O interface features, AT45DQ161-SSHFHD-T must be used to maintain interface compatibility.

Q: What is the difference between page write cycle times of 4ms and 6ms?

A: The AT45DB161E series specifies 4ms page write cycle time, while AT45DQ161 variants specify 6ms. The faster write cycle of AT45DB161E represents improved performance. Applications with timing-critical write operations benefit from this specification. Both values are within acceptable FLASH memory operation parameters.

Q: Are all substitute parts available in the same 8-SOIC package?

A: Yes, all substitute parts use the 8-SOIC (0.154", 3.90mm Width) package format, ensuring direct PCB compatibility without layout modifications or redesign.

Q: What is the significance of extended supply voltage range to 2.3V?

A: AT45DB161E and AT45DQ161-SSHFHD-T extend the minimum supply voltage from 2.5V to 2.3V, providing broader operational flexibility in power supply designs and improved compatibility with lower-voltage system architectures.

Q: Which substitute part offers the best availability?

A: AT45DB161E-SSHFHC-T provides the highest inventory level at 96,202 units in Tape & Reel packaging, making it the optimal choice for high-volume production requirements.

Q: Does operating temperature range affect substitution compatibility?

A: AT45DQ161-SSHFHD-T extends the operating temperature range to 105°C compared to the original 85°C specification. This provides enhanced thermal performance for applications requiring extended temperature operation. AT45DB161E variants maintain the original -40°C to 85°C range.