AT45DB321E-SHFHC-T Equivalent & Substitute Parts

Part Overview

The AT45DB321E-SHFHC-T is a 32Mbit FLASH memory IC with SPI interface manufactured by Renesas Electronics Corporation. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. The device operates at 85 MHz clock frequency with SPI serial communication protocol, designed for non-volatile data storage applications requiring 32-megabit capacity in 8-SOIC surface mount packaging.

Substiute Parts

AT45DB321E-SHFHC-T

Renesas Electronics CorporationIn Stock: 742AT45DB321E-SHFHC-T Datasheet

Current PartRFQ

AT45DB321E-SHF-T

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

MFR RecommendedRFQ

AT45DB321E-SHFHA-T

Renesas Electronics CorporationIn Stock: 2583AT45DB321E-SHFHA-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

Substitution eligibility is determined by strict parameter matching across the following critical criteria:

Memory capacity (32Mbit), memory format (FLASH), interface protocol (SPI), memory organization (528 Bytes x 8192 pages), voltage supply range (2.3V ~ 3.6V), operating temperature range (-40°C ~ 85°C), package type (8-SOIC), and write cycle timing (8µs word, 4ms page).

Clock frequency represents a secondary parameter: parts operating at 85 MHz or higher are functionally compatible, as higher frequency operation maintains backward compatibility with 85 MHz applications. Parts are grouped by clock frequency tier and product status (Active vs. Discontinued).

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the discontinued AT45DB321E-SHFHC-T, AT45DB321E-SHF-T is the primary equivalent, maintaining identical electrical specifications and clock frequency while offering Active product status and higher inventory availability (14,200 units in stock).

AT45DB321E-SHFHA-T provides an alternative with identical electrical performance, differentiated by Tape & Reel packaging format and lower inventory levels (2,504 units).

AT45DQ321-SHF-B and AT45DQ321-SHF-T are functionally compatible substitutes with enhanced clock frequency (104 MHz), providing superior performance margin while maintaining all other electrical and mechanical parameters. These parts are manufactured by different entities (Renesas and Adesto Technologies respectively) and offer significantly higher inventory availability.

All substitute parts maintain ROHS3 compliance, identical moisture sensitivity rating (MSL 1), and equivalent write cycle timing specifications.

Frequently Asked Questions (FAQ)

Q: Can AT45DQ321 series parts replace AT45DB321E series parts?

A: Yes. Both series share identical memory capacity (32Mbit), interface protocol (SPI), memory organization (528 Bytes x 8192 pages), voltage supply range (2.3V ~ 3.6V), operating temperature range (-40°C ~ 85°C), and 8-SOIC package dimensions. The AT45DQ321 series operates at 104 MHz versus 85 MHz, providing backward compatibility with applications designed for 85 MHz operation.

Q: What is the significance of packaging type differences (Cut Tape, Tape & Reel, Tube)?

A: Packaging type affects handling, storage, and automated assembly processes but does not alter electrical or mechanical device specifications. Selection depends on manufacturing process requirements and volume quantities. Cut Tape and Digi-Reel formats suit lower-volume or mixed-component assembly; Tape & Reel format accommodates high-volume automated pick-and-place equipment; Tube packaging is suitable for manual assembly or lower-volume applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status, identical to the original AT45DB321E-SHFHC-T specification.

Q: What is the difference between AT45DB321E-SHF-T and AT45DB321E-SHFHA-T?

A: Both parts are electrically and mechanically identical. The primary difference is packaging format: AT45DB321E-SHF-T is supplied in Cut Tape and Digi-Reel formats, while AT45DB321E-SHFHA-T is supplied in Tape & Reel format. Inventory availability also differs (14,200 units versus 2,504 units respectively).

Q: Can I use AT45DQ321-SHF-B in place of AT45DB321E-SHFHC-T?

A: Yes. The AT45DQ321-SHF-B maintains all critical electrical parameters and 8-SOIC package compatibility. The 104 MHz clock frequency exceeds the original 85 MHz specification, ensuring full backward compatibility. Packaging differs (Tube versus Cut Tape), which may affect assembly process compatibility.