AT25320-10PI Equivalent & Substitute Parts

Part Overview

The AT25320-10PI is a 32Kbit EEPROM memory IC with SPI interface operating at 3 MHz, manufactured by Microchip Technology in 8-DIP through-hole packaging. This part is classified as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations. The obsolete status necessitates evaluation of active alternative components that maintain functional and mechanical compatibility.

Substiute Parts

AT25320-10PI

Microchip TechnologyIn Stock: 791AT25320-10PI Datasheet

Current PartRFQ

25AA320A-I/P

Microchip TechnologyIn Stock: 113725AA320A-I/P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the AT25320-10PI is determined by the following critical parameters:

• Memory Capacity & Organization: Must be 32Kbit with 4K x 8 organization to maintain software compatibility and address space equivalence
• Interface Protocol: SPI interface is mandatory for direct pin-level compatibility
• Package & Mounting: 8-DIP through-hole package with 0.300" (7.62mm) spacing ensures mechanical and PCB layout compatibility
• Operating Temperature Range: Must support -40°C ~ 85°C minimum to match application requirements
• Write Cycle Time: 5ms specification must be met or exceeded

The 25AA320A-I/P qualifies as a direct substitute based on these parameters. While it operates at 10 MHz (higher than the 3 MHz specification), this represents an enhancement rather than a limitation. The substitute supports a wider supply voltage range (1.8V ~ 5.5V) and maintains all other critical specifications.

Parameter Comparison

Engineering Selection Recommendations

The 25AA320A-I/P is a qualified substitute for the AT25320-10PI based on the following factors:

Functional Equivalence: Both components share identical memory capacity, organization, interface protocol, and package specifications. The higher clock frequency of the substitute (10 MHz vs. 3 MHz) is operationally compatible with systems designed for the original part.

Supply Voltage Compatibility: The substitute's extended supply voltage range (1.8V ~ 5.5V) encompasses the original specification (4.5V ~ 5.5V), ensuring operation across all original design conditions.

Compliance Status: The 25AA320A-I/P holds ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The original AT25320-10PI is RoHS non-compliant, making the substitute preferable for new designs and long-term system support.

Availability: The substitute is in active production status with documented inventory availability, whereas the original is obsolete.

Frequently Asked Questions (FAQ)

Q: Can the 25AA320A-I/P directly replace the AT25320-10PI in existing designs?

A: Yes. Both components are pin-compatible 8-DIP packages with identical memory specifications, SPI interface, and operating temperature ranges. No PCB modifications are required.

Q: Does the higher clock frequency (10 MHz vs. 3 MHz) affect compatibility?

A: No. The substitute's higher frequency is backward compatible. Systems designed for 3 MHz operation will function correctly with the 10 MHz part. The substitute can also support faster SPI communication if the application requires it.

Q: Are there any voltage supply considerations?

A: The substitute supports a wider voltage range (1.8V ~ 5.5V) compared to the original (4.5V ~ 5.5V). This provides greater design flexibility and is fully compatible with the original specification.

Q: What is the significance of the RoHS compliance difference?

A: The substitute meets ROHS3 compliance standards, while the original is non-compliant. For new designs, regulatory applications, or long-term system support, the compliant substitute is the appropriate choice.

Q: Are the write cycle times equivalent?

A: Yes. Both components specify 5ms write cycle time, ensuring identical performance characteristics for memory write operations.

Q: Is the 8-DIP package identical between both parts?

A: Yes. Both use 8-DIP (0.300", 7.62mm) through-hole packaging with identical pin assignments and mechanical dimensions.