AT25512Y7-YH-T Equivalent & Substitute Parts

Part Overview

The AT25512Y7-YH-T is a 512Kbit EEPROM memory IC manufactured by Microchip Technology, featuring SPI interface with 20 MHz clock frequency and 8-UDFN surface mount packaging. This part is classified as obsolete, necessitating identification of active equivalent components for new designs and production continuity. The substitute part maintains identical core memory specifications while offering improved product status and moisture sensitivity characteristics.

Substiute Parts

AT25512Y7-YH-T

Microchip TechnologyIn Stock: 3972AT25512Y7-YH-T Datasheet

Current PartRFQ

25AA512T-I/MF

Microchip TechnologyIn Stock: 109225AA512T-I/MF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of AT25512Y7-YH-T with 25AA512T-I/MF is valid based on the following matched electrical and mechanical parameters:

• Memory capacity: 512Kbit (identical)
• Memory organization: 64K x 8 (identical)
• Interface protocol: SPI (identical)
• Clock frequency: 20 MHz (identical)
• Write cycle time: 5ms (identical)
• Supply voltage range: 1.8V ~ 5.5V (identical)
• Operating temperature range: -40°C ~ 85°C (identical)
• RoHS compliance: ROHS3 Compliant (identical)
• Manufacturer: Microchip Technology (same source)

Package differences exist (8-UDFN vs 8-DFN-S) and moisture sensitivity levels differ (MSL 3 vs MSL 1), requiring physical layout verification and storage condition assessment during implementation.

Parameter Comparison

Engineering Selection Recommendations

The 25AA512T-I/MF serves as the active equivalent for the obsolete AT25512Y7-YH-T. Selection of this substitute is supported by:

• Identical electrical specifications across all functional parameters
• Active product status ensuring long-term availability and supply chain continuity
• Superior moisture sensitivity rating (MSL 1 vs MSL 3) providing extended shelf life and reduced handling constraints
• Maintained ROHS3 and REACH compliance status
• Same manufacturer source, ensuring consistent quality and documentation

Package geometry differences (8-UDFN 6x4.9 versus 8-DFN-S 6x5) require PCB layout adjustment. The 25AA512T-I/MF package is marginally larger in one dimension, necessitating footprint verification before implementation.

Frequently Asked Questions (FAQ)

Q: Are the electrical specifications identical between AT25512Y7-YH-T and 25AA512T-I/MF?

A: Yes. Both parts share identical memory capacity (512Kbit), organization (64K x 8), interface protocol (SPI), clock frequency (20 MHz), write cycle time (5ms), supply voltage range (1.8V ~ 5.5V), and operating temperature range (-40°C ~ 85°C).

Q: What are the package differences between these parts?

A: AT25512Y7-YH-T uses 8-UDFN (6x4.9) packaging, while 25AA512T-I/MF uses 8-DFN-S (6x5) packaging. The substitute package is slightly larger in one dimension. PCB footprint adjustment is required.

Q: Why is the moisture sensitivity level different?

A: AT25512Y7-YH-T carries MSL 3 (168 hours maximum shelf life at specified humidity), while 25AA512T-I/MF carries MSL 1 (unlimited shelf life). This reflects manufacturing process differences and provides the substitute with superior storage flexibility.

Q: Can I use 25AA512T-I/MF as a direct drop-in replacement?

A: Electrical compatibility is confirmed. Physical compatibility requires PCB layout modification due to package geometry differences. Pin configuration and functionality remain identical.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both AT25512Y7-YH-T and 25AA512T-I/MF are ROHS3 compliant and REACH unaffected.

Q: Why should I transition from AT25512Y7-YH-T to 25AA512T-I/MF?

A: AT25512Y7-YH-T is classified as obsolete. The 25AA512T-I/MF is an active product with guaranteed long-term availability, identical electrical performance, and improved moisture sensitivity characteristics.