AT45DB321E-SHFHA-T Equivalent & Substitute Parts

Part Overview

The AT45DB321E-SHFHA-T is a 32Mbit Serial Peripheral Interface (SPI) FLASH memory IC manufactured by Renesas Electronics Corporation in an 8-SOIC surface mount package. This non-volatile memory device operates at 85 MHz and is designed for applications requiring reliable data storage with SPI interface compatibility. The part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity level rating. Substitute parts are identified to address packaging availability, inventory levels, and performance tier requirements while maintaining core electrical and mechanical compatibility.

Substiute Parts

AT45DB321E-SHFHA-T

Renesas Electronics CorporationIn Stock: 2583AT45DB321E-SHFHA-T Datasheet

Current PartRFQ

AT45DB321E-SHF-T

Renesas Electronics CorporationIn Stock: 14289AT45DB321E-SHF-T Datasheet

MFR RecommendedRFQ

AT45DQ321-SHF-B

Renesas Electronics CorporationIn Stock: 46262AT45DQ321-SHF-B Datasheet

MFR RecommendedRFQ

AT45DQ321-SHF-T

Adesto TechnologiesIn Stock: 3643AT45DQ321-SHF-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT45DB321E-SHFHA-T are qualified based on the following criteria:

Core Electrical Compatibility: All substitute parts maintain identical memory size (32Mbit), memory format (FLASH), interface protocol (SPI), memory organization (528 Bytes x 8192 pages), write cycle timing (8µs word / 4ms page), supply voltage range (2.3V ~ 3.6V), and operating temperature range (-40°C ~ 85°C).

Mechanical Compatibility: All substitute parts use the same 8-SOIC package footprint (0.209", 5.30mm Width) with surface mount technology, ensuring PCB layout compatibility.

Compliance Equivalence: All substitute parts maintain RoHS3 compliance, MSL Level 1 rating, and identical ECCN/HTSUS classifications.

Differentiation Parameters: Substitutes are grouped by clock frequency performance tier (85 MHz vs. 104 MHz) and packaging format (Tape & Reel, Cut Tape/Digi-Reel, or Tube).

Parameter Comparison

Engineering Selection Recommendations

AT45DB321E-SHF-T (Renesas Electronics): Direct electrical equivalent with identical 85 MHz clock frequency and AT45DB321 base product number. Differs only in packaging format (Cut Tape & Digi-Reel vs. Tape & Reel). Suitable for applications where packaging format flexibility is acceptable. Product status is active with verified DiGi-Electronics programmability.

AT45DQ321-SHF-B (Renesas Electronics): Electrical substitute with enhanced clock frequency (104 MHz vs. 85 MHz). Maintains all other electrical and mechanical parameters. Packaged in Tube format. Suitable for applications requiring higher SPI clock performance while maintaining identical memory organization and write cycle timing. Product status is active.

AT45DQ321-SHF-T (Adesto Technologies): Electrical substitute with enhanced clock frequency (104 MHz vs. 85 MHz). Maintains all other electrical and mechanical parameters. Packaged in Tape & Reel format. Suitable for applications requiring higher SPI clock performance with standard reel packaging. Product status is active.

All substitute parts maintain full compliance with RoHS3 requirements and MSL Level 1 moisture sensitivity rating, ensuring equivalent reliability and environmental compliance to the primary part.

Frequently Asked Questions (FAQ)

Q: Can AT45DQ321 series parts directly replace AT45DB321E parts?

A: Yes, within the constraints of clock frequency requirements. The AT45DQ321 series operates at 104 MHz compared to the AT45DB321E at 85 MHz. All other electrical parameters, memory organization, write cycle timing, voltage supply range, operating temperature, and package footprint are identical. Applications designed for 85 MHz operation will function with 104 MHz parts, as the higher frequency is backward compatible.

Q: What is the difference between Tape & Reel, Cut Tape & Digi-Reel, and Tube packaging?

A: These are packaging and delivery format variations only. Tape & Reel (TR) provides components on continuous tape in reel format for automated assembly. Cut Tape (CT) & Digi-Reel provides the same tape format but cut to specific lengths with optional reel packaging. Tube packaging provides components in plastic tubes for manual handling. All three formats contain identical die and electrical performance; the choice depends on assembly process requirements and inventory handling procedures.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The primary part AT45DB321E-SHFHA-T and all listed substitute parts (AT45DB321E-SHF-T, AT45DQ321-SHF-B, AT45DQ321-SHF-T) are ROHS3 compliant with identical ECCN and HTSUS classifications.

Q: What is the significance of the MSL Level 1 rating?

A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control requirements. All listed parts carry this rating, meaning they can be stored and handled without special moisture-barrier packaging or baking procedures prior to soldering.

Q: Can I use AT45DQ321 parts in a design originally specified for AT45DB321E?

A: Yes, provided the application does not have a maximum clock frequency constraint below 104 MHz. The AT45DQ321 series is electrically and mechanically compatible with identical memory capacity, interface protocol, voltage supply range, operating temperature, and package footprint. The higher clock frequency is a performance enhancement that does not create incompatibility with designs specified for lower frequency operation.