AT45DQ321-MWHF2B-T Equivalent & Substitute Parts

Part Overview

The AT45DQ321-MWHF2B-T is a 32Mbit FLASH memory IC manufactured by Renesas Electronics Corporation, designed for SPI interface applications operating at 104 MHz. This non-volatile memory device is packaged in an 8-VDFN (6x8) surface mount configuration with an exposed pad. The part is currently in active production status with 1141 units available in stock.

Substitute parts are identified when equivalent memory capacity, interface protocol, package type, and electrical specifications align within acceptable operational parameters. Alternative models may be required due to inventory constraints, supply chain considerations, or specific application requirements.

Substiute Parts

AT45DQ321-MWHF2B-T

Renesas Electronics CorporationIn Stock: 1230AT45DQ321-MWHF2B-T Datasheet

Current PartRFQ

AT45DB321E-MWHF2B-T

Renesas Electronics CorporationIn Stock: 2538AT45DB321E-MWHF2B-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT45DQ321-MWHF2B-T is determined by the following critical parameters:

• Memory Capacity: 32Mbit (fixed requirement)
• Memory Interface: SPI protocol (fixed requirement)
• Package Configuration: 8-VDFN Exposed Pad (6x8) surface mount (fixed requirement)
• Memory Organization: 512 Bytes x 8192 pages (fixed requirement)
• Voltage Supply Range: 2.3V ~ 3.6V (fixed requirement)
• Operating Temperature Range: -40°C ~ 85°C (fixed requirement)
• Clock Frequency: Acceptable range determined by application timing requirements
• Write Cycle Time: Must meet or exceed application performance specifications

The AT45DB321E-MWHF2B-T qualifies as a substitute part because it maintains identical memory capacity, interface type, package configuration, memory organization, voltage specifications, and operating temperature range. The clock frequency difference (85 MHz versus 104 MHz) represents a reduced performance specification that is acceptable in applications where the lower frequency meets timing requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the AT45DQ321-MWHF2B-T and AT45DB321E-MWHF2B-T are active production parts manufactured by Renesas Electronics Corporation with identical RoHS3 compliance and REACH unaffected status. Both devices carry MSL rating 1 (Unlimited), indicating no moisture sensitivity constraints during storage or handling.

Selection between these parts depends on application clock frequency requirements. The AT45DQ321-MWHF2B-T operates at 104 MHz maximum clock frequency, while the AT45DB321E-MWHF2B-T operates at 85 MHz maximum clock frequency. Applications requiring operation at frequencies exceeding 85 MHz must use the AT45DQ321-MWHF2B-T. Applications operating at or below 85 MHz may use either part interchangeably from an electrical and mechanical standpoint.

Both parts maintain identical write cycle times (8µs word, 4ms page), voltage supply ranges (2.3V ~ 3.6V), and operating temperature specifications (-40°C ~ 85°C), ensuring functional compatibility in circuits designed for either device.

Frequently Asked Questions (FAQ)

Q: Can the AT45DB321E-MWHF2B-T replace the AT45DQ321-MWHF2B-T in all applications?

A: The AT45DB321E-MWHF2B-T can replace the AT45DQ321-MWHF2B-T only in applications where the maximum SPI clock frequency does not exceed 85 MHz. Applications requiring clock frequencies between 85 MHz and 104 MHz must use the AT45DQ321-MWHF2B-T.

Q: Are the package dimensions identical between these two parts?

A: Yes. Both parts use the 8-VDFN Exposed Pad package with 6x8 mm dimensions. PCB footprints and assembly processes are identical.

Q: Do these parts have different voltage supply requirements?

A: No. Both parts operate within the identical voltage supply range of 2.3V to 3.6V and are compatible with the same power supply designs.

Q: What is the significance of the different part numbers (DQ versus DB)?

A: The part number designation reflects the maximum operating clock frequency. The DQ variant supports 104 MHz operation, while the DB variant supports 85 MHz operation. All other electrical and mechanical specifications remain equivalent.

Q: Are both parts suitable for industrial temperature applications?

A: Yes. Both parts operate across the -40°C to 85°C temperature range, meeting industrial temperature specifications.

Q: Do these parts have different compliance certifications?

A: No. Both parts carry identical RoHS3 compliance and REACH unaffected status, with MSL rating 1 (Unlimited).