AT24C512BY7-YH-T Equivalent & Substitute Parts

Part Overview

The AT24C512BY7-YH-T is a 512Kbit EEPROM memory IC with I2C interface manufactured by Microchip Technology. This device operates at 1 MHz clock frequency with 900 ns access time and is housed in an 8-UDFN package with exposed pad. The part is currently classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

AT24C512BY7-YH-T

Microchip TechnologyIn Stock: 809AT24C512BY7-YH-T Datasheet

Current PartRFQ

24AA512T-I/MF

Microchip TechnologyIn Stock: 748124AA512T-I/MF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT24C512BY7-YH-T is determined by the following critical parameters:

• Memory capacity (512Kbit) and organization (64K x 8)
• I2C serial interface protocol
• Access time (900 ns) and write cycle time (5ms)
• Operating temperature range (-40°C ~ 85°C)
• Surface mount package compatibility
• Supply voltage compatibility

The 24AA512T-I/MF qualifies as a substitute based on matching memory size, organization, interface type, access time, write cycle time, and operating temperature range. Both devices maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Parameter Comparison

Engineering Selection Recommendations

The 24AA512T-I/MF is the manufacturer-recommended substitute for the obsolete AT24C512BY7-YH-T. This substitute maintains functional equivalence across all critical memory parameters: 512Kbit capacity, 64K x 8 organization, I2C interface, 900 ns access time, and 5ms write cycle time.

The substitute operates across an extended supply voltage range (1.7V ~ 5.5V) compared to the original part (1.8V ~ 3.6V), providing greater design flexibility. Clock frequency is reduced from 1 MHz to 400 kHz; however, both devices maintain identical access time specifications.

Package dimensions differ slightly (8-UDFN 6x4.9 versus 8-DFN-S 6x5), requiring PCB layout verification for mechanical compatibility. Both devices are ROHS3 compliant with MSL 1 rating and maintain identical operating temperature specifications.

The 24AA512T-I/MF is currently in active production status with verified DiGi-Electronics programmability, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 24AA512T-I/MF directly replace the AT24C512BY7-YH-T in existing designs?

A: Functional replacement is supported based on matching memory capacity, organization, interface protocol, and timing specifications. PCB layout verification is required due to package dimension differences (6x4.9 versus 6x5).

Q: What is the significance of the clock frequency difference (1 MHz versus 400 kHz)?

A: Both devices maintain identical 900 ns access time specifications. The reduced clock frequency in the substitute does not impact data access performance for I2C protocol operations.

Q: Are there supply voltage compatibility considerations?

A: The substitute operates across a wider voltage range (1.7V ~ 5.5V) compared to the original (1.8V ~ 3.6V). Systems designed for the original part's voltage range remain fully compatible with the substitute.

Q: How do the package types differ?

A: The original uses 8-UDFN (6x4.9) while the substitute uses 8-DFN-S (6x5). Both are surface mount packages with exposed pads. Footprint differences require PCB layout review before implementation.

Q: Is the substitute available in production quantities?

A: The 24AA512T-I/MF is in active production status with 7437 pieces in stock, compared to the obsolete original part with 714 pieces remaining inventory.