AT45DB011D-SH-T-AD Equivalent & Substitute Parts

Part Overview

The AT45DB011D-SH-T-AD is a 1Mbit FLASH memory IC manufactured by Renesas Electronics Corporation, featuring SPI interface operation at 66 MHz. This component is designed for non-volatile data storage applications requiring serial peripheral interface communication. The part is currently classified as obsolete, necessitating identification of functionally compatible alternatives for ongoing system support and new design implementations.

Substiute Parts

AT45DB011D-SH-T-AD

Renesas Electronics CorporationIn Stock: 1249AT45DB011D-SH-T-AD Datasheet

Current PartRFQ

AT45DB021E-SSHN2B-T

Renesas Electronics CorporationIn Stock: 4217AT45DB021E-SSHN2B-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT45DB011D-SH-T-AD is determined by the following critical parameters:

• Memory Interface: SPI protocol compatibility is mandatory
• Package Type: 8-SOIC surface mount package ensures mechanical and electrical compatibility
• Manufacturer: Renesas Electronics Corporation maintains design continuity and supply chain consistency
• Memory Format: FLASH technology with non-volatile storage capability
• Operating Voltage Range: Supply voltage compatibility within specified limits
• Operating Temperature Range: Thermal operating envelope compatibility

The AT45DB021E-SSHN2B-T qualifies as a substitute based on matching interface protocol, package type, manufacturer, memory format, and operating specifications. The substitute provides increased memory capacity (2Mbit versus 1Mbit) and enhanced clock frequency (70 MHz versus 66 MHz), representing a functional upgrade path.

Parameter Comparison

Engineering Selection Recommendations

The AT45DB021E-SSHN2B-T is the designated substitute for the obsolete AT45DB011D-SH-T-AD. Selection of this substitute is supported by the following factors:

• Product Status: The substitute maintains active production status, ensuring long-term availability and supply chain continuity
• Regulatory Compliance: The substitute achieves ROHS3 compliance, meeting current environmental and regulatory requirements
• Interface Compatibility: Both components utilize identical SPI protocol, enabling direct firmware and driver compatibility
• Package Compatibility: Both components employ 8-SOIC surface mount packaging, supporting PCB layout reuse with minor footprint adjustments due to width variation
• Electrical Compatibility: The substitute operates within the original part's supply voltage range and maintains identical thermal operating specifications
• Performance Enhancement: The substitute provides increased memory capacity and faster page write cycle time, representing functional improvement

Frequently Asked Questions (FAQ)

Q: Can the AT45DB021E-SSHN2B-T directly replace the AT45DB011D-SH-T-AD without firmware modification?

A: The SPI interface protocol is identical between both components. Firmware compatibility depends on application-specific memory addressing and capacity requirements. The substitute's doubled memory capacity (2Mbit versus 1Mbit) requires address space evaluation within the application architecture.

Q: What is the physical difference between the two 8-SOIC packages?

A: The main part features an 8-SOIC package with 5.30mm width, while the substitute uses an 8-SOIC package with 3.90mm width. Both maintain identical pin pitch and electrical connectivity. PCB footprint adjustment is required for the narrower package profile.

Q: Does the substitute's lower minimum supply voltage (1.65V) affect system design?

A: The substitute's expanded voltage range (1.65V ~ 3.6V) is backward compatible with the original part's specification (2.7V ~ 3.6V). Systems designed for the original 2.7V minimum threshold operate without modification.

Q: What is the significance of the faster page write cycle time in the substitute?

A: The substitute reduces page write cycle time from 4ms to 3ms, improving data programming speed. This enhancement does not require firmware modification and represents performance improvement for write-intensive applications.

Q: Are there pin-to-pin compatibility considerations?

A: Both components utilize 8-SOIC packaging with identical pin assignments and electrical function. Pin-to-pin compatibility is maintained, supporting direct socket replacement with appropriate PCB footprint adjustment.