AT25320B-SSPDGV-T EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The AT25320B-SSPDGV-T is a 32Kbit Serial Peripheral Interface (SPI) EEPROM memory IC manufactured by Microchip Technology. This non-volatile memory device operates at 5 MHz clock frequency with a supply voltage range of 2.5V to 5.5V and is qualified to AEC-Q100 automotive standards. The component is actively produced and available in high volume inventory. Substitute parts are identified when equivalent memory capacity, interface protocol, and package form factor requirements must be met while accommodating different operational specifications or supply chain availability.

Substiute Parts

AT25320B-SSPDGV-T

Microchip TechnologyIn Stock: 2286AT25320B-SSPDGV-T Datasheet

Current PartRFQ

FT25C32A-USR-T

Fremont Micro Devices LtdIn Stock: 3711FT25C32A-USR-T Datasheet

MFR RecommendedRFQ

M95320-DFMN6TP

STMicroelectronicsIn Stock: 5140M95320-DFMN6TP Datasheet

MFR RecommendedRFQ

M95320-RMN6TP

STMicroelectronicsIn Stock: 2384M95320-RMN6TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT25320B-SSPDGV-T is determined by the following critical parameters:

Core Compatibility Requirements:

• Memory Size: 32Kbit (mandatory match)
• Memory Organization: 4K x 8 (mandatory match)
• Memory Interface: SPI (mandatory match)
• Package / Case: 8-SOIC form factor (mandatory match)
• Write Cycle Time: 5ms (mandatory match)

Allowable Variations:

• Clock Frequency: Substitute parts may operate at higher frequencies (20 MHz) while remaining backward compatible
• Voltage Supply Range: Substitute parts may have different minimum voltage thresholds (1.7V, 1.8V) provided the upper limit accommodates 5.5V operation
• Operating Temperature: Substitute parts may have reduced upper temperature limits (-40°C ~ 85°C) depending on application requirements
• Moisture Sensitivity Level: Substitute parts may have improved MSL ratings (1 vs. 3)

The three identified substitute parts meet all core compatibility requirements while offering enhanced performance characteristics or improved environmental specifications.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active production status and ROHS3 compliance, ensuring long-term availability and regulatory alignment with the original AT25320B-SSPDGV-T.

M95320-DFMN6TP and M95320-RMN6TP (STMicroelectronics): These parts provide direct package compatibility (8-SOIC) with enhanced clock frequency (20 MHz) and improved moisture sensitivity ratings (MSL 1). Both variants are suitable for applications where the original 5 MHz specification is not a limiting factor. The M95320-DFMN6TP is supplied in Cut Tape & Digi-Reel packaging, while M95320-RMN6TP is also available in the same format.

FT25C32A-USR-T (Fremont Micro Devices Ltd): This part offers 20 MHz operation and superior MSL rating (1) but uses an 8-SOP package variant. Physical footprint verification is required before selection, as SOP and SOIC packages have different pin spacing and land pattern requirements despite similar overall dimensions.

For applications requiring the original -40°C ~ 125°C temperature range, the AT25320B-SSPDGV-T remains the only option among these parts. Substitute selection should prioritize package compatibility and thermal requirements specific to the target application.

Frequently Asked Questions (FAQ)

Q: Can FT25C32A-USR-T replace AT25320B-SSPDGV-T directly on the PCB?

A: FT25C32A-USR-T uses an 8-SOP package while AT25320B-SSPDGV-T uses 8-SOIC. Although both are 8-pin surface mount packages with 0.154" width, the pin pitch and land pattern differ. PCB layout modification is required for direct substitution.

Q: What is the functional difference between the three substitute parts?

A: All three substitutes provide identical 32Kbit SPI EEPROM functionality with 4K x 8 organization and 5ms write cycle time. The primary differences are clock frequency (20 MHz vs. 5 MHz), voltage supply minimum threshold, operating temperature range, and moisture sensitivity rating.

Q: Are the M95320-DFMN6TP and M95320-RMN6TP interchangeable?

A: Both parts are manufactured by STMicroelectronics with identical memory specifications, clock frequency, and package form factor. The primary difference is voltage supply range: M95320-DFMN6TP operates at 1.7V ~ 5.5V while M95320-RMN6TP operates at 1.8V ~ 5.5V. Selection depends on the minimum supply voltage requirement of the target application.

Q: Does higher clock frequency (20 MHz) affect compatibility?

A: Higher clock frequency in substitute parts is backward compatible. Systems designed for 5 MHz operation will function correctly with 20 MHz parts, as the SPI interface allows clock speed reduction through firmware or hardware configuration.

Q: What does MSL rating mean for component selection?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions before soldering. MSL 1 (Unlimited) provides greater flexibility in manufacturing and storage compared to MSL 3 (168 Hours). Substitute parts with MSL 1 rating offer extended shelf life and reduced risk of moisture-related failures.

Q: Is automotive qualification (AEC-Q100) maintained in substitute parts?

A: The provided data does not include AEC-Q100 qualification status for substitute parts. If automotive-grade qualification is a system requirement, this must be verified with the respective manufacturers before final selection.