25AA040-I/P EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 25AA040-I/P is a 4Kbit Serial Peripheral Interface (SPI) EEPROM memory integrated circuit manufactured by Microchip Technology. This non-volatile memory device operates at 1 MHz clock frequency with a supply voltage range of 1.8V to 5.5V and is housed in an 8-pin DIP package. The part is currently in active production status and is RoHS3 compliant. Substitute parts are identified when equivalent memory capacity, interface type, package configuration, and electrical specifications align within acceptable operational parameters.

Substiute Parts

25AA040-I/P

Microchip TechnologyIn Stock: 89525AA040-I/P Datasheet

Current PartRFQ

25AA040A-I/P

Microchip TechnologyIn Stock: 321225AA040A-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 25AA040-I/P are identified based on the following critical parameters that must remain constant or compatible:

• Memory capacity: 4Kbit (512 x 8 organization)
• Interface protocol: SPI
• Package configuration: 8-DIP through-hole
• Supply voltage range: 1.8V ~ 5.5V (minimum overlap required)
• Operating temperature range: -40°C ~ 85°C
• Write cycle time: 5ms
• Compliance standards: RoHS3, REACH Unaffected

The 25AA040A-I/P qualifies as a substitute because it maintains identical memory capacity, organization, interface type, package, voltage range, temperature range, and write cycle time. The primary difference is an increased clock frequency specification (10 MHz versus 1 MHz), which represents an enhanced performance characteristic that does not restrict backward compatibility in applications designed for the original 1 MHz specification.

Parameter Comparison

Engineering Selection Recommendations

The 25AA040A-I/P is a direct substitute for the 25AA040-I/P in applications where the original part is no longer available or inventory constraints require alternative sourcing. Both parts maintain identical compliance certifications (RoHS3, REACH Unaffected) and are manufactured by Microchip Technology. The 25AA040A-I/P offers enhanced clock frequency capability (10 MHz) while preserving all other electrical and mechanical specifications, making it suitable for existing circuit designs without modification. The 25AA040-I/P is verified as programmable through DiGi-Electronics, while the 25AA040A-I/P has not undergone this verification process. Selection should account for application-specific programmability requirements if this certification is mandatory.

Frequently Asked Questions (FAQ)

Q: Can the 25AA040A-I/P replace the 25AA040-I/P in existing designs?

A: Yes. The 25AA040A-I/P maintains identical memory capacity, organization, SPI interface, supply voltage range, operating temperature range, write cycle time, and 8-DIP package configuration. The increased clock frequency (10 MHz) does not prevent operation in circuits designed for 1 MHz operation.

Q: Are there any pin configuration differences between these parts?

A: No. Both parts use the 8-DIP (0.300", 7.62mm) through-hole package with identical pin assignments and mechanical dimensions.

Q: Do both parts meet the same compliance standards?

A: Both the 25AA040-I/P and 25AA040A-I/P are RoHS3 compliant and REACH unaffected. They share identical ECCN (EAR99) and HTSUS (8542.32.0051) classifications.

Q: What is the significance of the clock frequency difference?

A: The 25AA040A-I/P operates at 10 MHz compared to the 1 MHz specification of the 25AA040-I/P. This represents improved performance capability. Applications designed for 1 MHz operation will function correctly with the higher-frequency part, as the device will operate within its specified parameters at lower clock rates.

Q: Are there supply chain or inventory considerations?

A: The 25AA040A-I/P has significantly higher inventory availability (3200 pcs) compared to the 25AA040-I/P (838 pcs), making it a viable alternative for volume production or long-term sourcing requirements.