AT25320B-CUL-T Equivalent & Substitute Parts

Part Overview

The AT25320B-CUL-T is a 32Kbit EEPROM memory IC manufactured by Microchip Technology, featuring SPI interface operation at 20 MHz. This non-volatile memory device is designed for applications requiring persistent data storage with low power consumption across industrial and commercial temperature ranges. The part is currently in active production status with robust inventory availability. Substitute parts become necessary when specific package requirements, lead time constraints, or supply chain considerations necessitate alternative sourcing while maintaining functional equivalence.

Substiute Parts

AT25320B-CUL-T

Microchip TechnologyIn Stock: 922AT25320B-CUL-T Datasheet

Current PartRFQ

M95320-DFMN6TP

STMicroelectronicsIn Stock: 5140M95320-DFMN6TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT25320B-CUL-T is determined by strict equivalence across the following critical parameters:

• Memory capacity: 32Kbit
• Memory organization: 4K x 8 bit structure
• Interface protocol: SPI serial communication
• Operating frequency: 20 MHz maximum
• Write cycle time: 5ms per page/word operation
• Supply voltage range: Minimum 1.8V operation capability
• Temperature range: -40°C to 85°C operational envelope
• Surface mount technology requirement
• RoHS3 compliance certification

The M95320-DFMN6TP from STMicroelectronics meets all functional and electrical equivalence criteria. The primary distinction lies in package form factor: the substitute uses 8-SOIC packaging versus the original 8-dBGA format. Both packages are surface-mount technologies suitable for automated assembly processes.

Parameter Comparison

Engineering Selection Recommendations

Both the AT25320B-CUL-T and M95320-DFMN6TP are active production devices with ROHS3 compliance certification and REACH unaffected status. Selection between these parts should be based on:

• PCB layout constraints and available footprint space for the respective package geometries
• Manufacturing process compatibility with either 8-dBGA or 8-SOIC assembly equipment
• Moisture sensitivity requirements: AT25320B-CUL-T specifies MSL 3 (168 hours); M95320-DFMN6TP specifies MSL 1 (unlimited)
• Supply chain availability and lead time considerations
• Cost structure differences between manufacturers and packaging formats

Both devices satisfy identical functional, electrical, and thermal specifications for SPI EEPROM applications requiring 32Kbit non-volatile storage.

Frequently Asked Questions (FAQ)

Q: Can M95320-DFMN6TP directly replace AT25320B-CUL-T on existing PCBs?

A: Direct PCB replacement is not possible due to different package formats. AT25320B-CUL-T uses 8-dBGA packaging while M95320-DFMN6TP uses 8-SOIC packaging. PCB redesign with appropriate footprint modification is required.

Q: Are the SPI interface pin configurations identical?

A: Both devices implement standard SPI protocol with 20 MHz operation. Pin-level compatibility requires verification against the specific pinout diagrams for each package type, as physical pin arrangements differ between dBGA and SOIC formats.

Q: What is the significance of the voltage supply range difference (1.8V vs 1.7V minimum)?

A: The M95320-DFMN6TP operates at a lower minimum voltage (1.7V) compared to the AT25320B-CUL-T (1.8V). This provides broader compatibility with low-power supply designs. Both devices support the full 5.5V maximum specification.

Q: How do moisture sensitivity levels affect component handling?

A: AT25320B-CUL-T with MSL 3 requires controlled storage conditions (168-hour floor life limit after moisture exposure). M95320-DFMN6TP with MSL 1 has unlimited floor life, reducing moisture-related handling constraints during manufacturing.

Q: Are both parts suitable for industrial temperature applications?

A: Yes. Both devices operate across the -40°C to 85°C temperature range, meeting industrial and extended commercial application requirements.

Q: What certifications apply to both substitute parts?

A: Both AT25320B-CUL-T and M95320-DFMN6TP carry ROHS3 compliance certification and REACH unaffected status, satisfying regulatory requirements for EU and international markets.