AT25320-10PI-2.7 Equivalent & Substitute Parts

Part Overview

The AT25320-10PI-2.7 is a 32Kbit EEPROM memory IC with SPI interface operating at 3 MHz, manufactured by Microchip Technology in 8-DIP packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain functional compatibility across memory capacity, interface protocol, and physical packaging while accommodating variations in operating voltage ranges and temperature specifications.

Substiute Parts

AT25320-10PI-2.7

Microchip TechnologyIn Stock: 3261AT25320-10PI-2.7 Datasheet

Current PartRFQ

25AA320A-I/P

Microchip TechnologyIn Stock: 113725AA320A-I/P Datasheet

DirectRFQ

25C320-I/P

Microchip TechnologyIn Stock: 188425C320-I/P Datasheet

MFR RecommendedRFQ

25C320/P

Microchip TechnologyIn Stock: 231225C320/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT25320-10PI-2.7 is determined by the following critical parameters:

• Memory Capacity & Organization: All substitutes must provide 32Kbit capacity in 4K x 8 organization
• Interface Protocol: SPI interface is mandatory for functional compatibility
• Package & Mounting: 8-DIP through-hole package with 0.300" (7.62mm) pitch
• Write Cycle Time: 5ms specification must be maintained
• Voltage Compatibility: Substitute operating voltage range must encompass the original 2.7V ~ 5.5V specification or be compatible with the target application voltage
• Temperature Range: Operating temperature must support the application requirements

Three substitute parts meet these criteria with variations in clock frequency, voltage range, and product status.

Parameter Comparison

Engineering Selection Recommendations

25AA320A-I/P: This part provides the widest voltage supply range (1.8V ~ 5.5V) and operates at 10 MHz clock frequency, exceeding the original 3 MHz specification. It maintains the required -40°C ~ 85°C temperature range and is ROHS3 compliant with active product status. This substitute is suitable for applications requiring extended low-voltage operation or higher clock speeds.

25C320-I/P: This part matches the original 3 MHz clock frequency and maintains the -40°C ~ 85°C temperature range. It is ROHS3 compliant with active product status and verified programmability. The voltage supply range is restricted to 4.5V ~ 5.5V, requiring confirmation that the application operates within this narrower range.

25C320/P: This part matches the original 3 MHz clock frequency and is ROHS3 compliant with active product status and verified programmability. The operating temperature range is limited to 0°C ~ 70°C, and voltage supply is restricted to 4.5V ~ 5.5V. This substitute is applicable only to applications with relaxed temperature and voltage requirements.

Frequently Asked Questions (FAQ)

Q: Can 25AA320A-I/P be used as a direct replacement for AT25320-10PI-2.7?

A: Yes, functionally. The 25AA320A-I/P maintains all critical parameters: 32Kbit capacity, 4K x 8 organization, SPI interface, 5ms write cycle time, and 8-DIP through-hole package. The higher 10 MHz clock frequency is backward compatible. However, the narrower voltage range (1.8V ~ 5.5V vs. 2.7V ~ 5.5V) must be verified against application requirements.

Q: What is the primary difference between 25C320-I/P and 25C320/P?

A: Both parts are electrically identical with matching 3 MHz clock frequency and 4.5V ~ 5.5V voltage range. The difference is operating temperature: 25C320-I/P supports -40°C ~ 85°C, while 25C320/P is limited to 0°C ~ 70°C. Select based on application temperature requirements.

Q: Are all substitute parts pin-compatible with the original AT25320-10PI-2.7?

A: Yes. All substitutes use the same 8-DIP (0.300", 7.62mm) through-hole package with identical pin configuration for SPI interface operation.

Q: Which substitute part is recommended for new designs?

A: Selection depends on application voltage and temperature requirements. For extended voltage range (down to 1.8V), use 25AA320A-I/P. For standard 5V operation with full temperature range, use 25C320-I/P. For 5V operation with limited temperature range (0°C ~ 70°C), use 25C320/P.

Q: Do all substitute parts meet RoHS compliance?

A: Yes. All three substitute parts are ROHS3 compliant, whereas the original AT25320-10PI-2.7 is RoHS non-compliant.