AT45DB011D-SH-B Equivalent & Substitute Parts

Part Overview

The AT45DB011D-SH-B is a 1Mbit FLASH memory IC manufactured by Renesas Electronics Corporation, featuring SPI interface operation at 66 MHz. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The part is housed in an 8-SOIC surface mount package with supply voltage range of 2.7V to 3.6V and operating temperature range of -40°C to 85°C.

Substiute Parts

AT45DB011D-SH-B

Renesas Electronics CorporationIn Stock: 2066AT45DB011D-SH-B Datasheet

Current PartRFQ

AT45DB021E-SHN-B

Renesas Electronics CorporationIn Stock: 12131AT45DB021E-SHN-B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Package Compatibility: Both parts must use 8-SOIC surface mount packaging with identical physical dimensions (0.209", 5.30mm Width)
• Interface Compatibility: SPI interface requirement must be maintained
• Voltage Compatibility: Supply voltage range must encompass or be compatible with the original 2.7V ~ 3.6V specification
• Temperature Range: Operating temperature range must support -40°C ~ 85°C minimum
• Memory Organization: Page size (264 Bytes) must remain consistent for protocol compatibility

The AT45DB021E-SHN-B qualifies as a substitute based on these parameters. While it provides increased memory capacity (2Mbit versus 1Mbit) and higher clock frequency (70 MHz versus 66 MHz), it maintains identical package form factor, SPI interface, compatible voltage range (1.65V ~ 3.6V), matching temperature range, and identical page organization structure.

Parameter Comparison

Engineering Selection Recommendations

The AT45DB021E-SHN-B is an active product with current manufacturing status, providing supply chain continuity for applications currently using the obsolete AT45DB011D-SH-B. Both components share identical package geometry and SPI protocol implementation, enabling direct substitution at the PCB level without layout modifications.

The AT45DB021E-SHN-B offers extended voltage compatibility (1.65V minimum versus 2.7V minimum), supporting broader power supply specifications. The substitute part maintains RoHS3 compliance status, whereas the original part status is not specified for this compliance standard. Both components carry identical REACH unaffected status and EAR99 export classification.

The increased memory capacity (2Mbit) and improved page write cycle time (3ms versus 4ms) of the substitute part provide performance enhancement without introducing compatibility constraints for existing firmware implementations that address the 1Mbit address space.

Frequently Asked Questions (FAQ)

Q: Can the AT45DB021E-SHN-B be used as a direct replacement for AT45DB011D-SH-B in existing designs?

A: Yes. Both parts use identical 8-SOIC packaging, SPI interface protocol, and matching page organization (264 Bytes). No PCB layout changes are required. Firmware must address only the 1Mbit memory space if the original design was coded for 1Mbit capacity.

Q: What are the voltage supply differences between these parts?

A: The AT45DB011D-SH-B operates at 2.7V ~ 3.6V. The AT45DB021E-SHN-B operates at 1.65V ~ 3.6V. The substitute part supports lower minimum voltage, making it compatible with a broader range of power supply designs.

Q: Are there any temperature range limitations when substituting?

A: No. Both parts maintain identical operating temperature range of -40°C ~ 85°C, ensuring equivalent thermal performance across all specified operating conditions.

Q: How do the memory capacities affect substitution?

A: The substitute part provides double the memory capacity (2Mbit versus 1Mbit). Existing firmware designed for 1Mbit operation will function without modification. Additional memory capacity remains available for future application expansion.

Q: What is the significance of the different clock frequencies?

A: The AT45DB021E-SHN-B operates at 70 MHz versus 66 MHz for the original part. This higher frequency provides improved data transfer rates while maintaining full backward compatibility with SPI interface timing requirements of the original design.

Q: Are there compliance or certification differences?

A: The AT45DB021E-SHN-B carries RoHS3 compliance certification. Both parts share identical REACH unaffected status and EAR99 export classification. The substitute part's active product status ensures ongoing compliance maintenance and supply availability.