24AA014T-I/MC EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24AA014T-I/MC is a 1Kbit I2C EEPROM memory IC manufactured by Microchip Technology, housed in an 8-DFN (2x3) surface mount package. This non-volatile memory device operates at 400 kHz clock frequency with 900 ns access time and supports supply voltages from 1.7V to 5.5V across an operating temperature range of -40°C to 85°C. The device is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent memory capacity, interface protocol, and electrical specifications align within acceptable operational parameters, enabling direct replacement in applications where performance characteristics remain compatible.

Key Parameters

Parameter	Value
Memory Size	1Kbit
Memory Organization	128 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5ms
Supply Voltage Range	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-VFDFN Exposed Pad
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 24AA014T-I/MC is determined by the following critical parameters:

Memory capacity and organization must remain constant at 1Kbit with 128 x 8 configuration to ensure software compatibility and address mapping equivalence. The I2C interface protocol is mandatory for bus-level compatibility. Supply voltage range must encompass or match the 1.7V to 5.5V specification to support the same power delivery architectures. Operating temperature range must cover or exceed -40°C to 85°C to maintain thermal compatibility across application environments.

Package type and mounting method must be compatible with existing PCB layouts and assembly processes. Surface mount packages in the 8-pin DFN family with exposed pad configurations are acceptable substitutes. RoHS3 compliance and regulatory certifications (REACH, ECCN EAR99) must be maintained for supply chain and export compliance.

The AT24CS01-MAHM-T qualifies as a substitute based on matching memory capacity, organization, interface protocol, voltage range, temperature range, and regulatory compliance. Differences in clock frequency (1 MHz vs. 400 kHz), access time (550 ns vs. 900 ns), and package variant (8-UDFN vs. 8-VFDFN) represent performance enhancements rather than incompatibilities, as the substitute operates at higher speeds while maintaining backward compatibility with I2C protocol specifications.

Parameter Comparison

Parameter	24AA014T-I/MC (Main Part)	AT24CS01-MAHM-T (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Memory Size	1Kbit	1Kbit
Memory Organization	128 x 8	128 x 8
Memory Interface	I2C	I2C
Clock Frequency	400 kHz	1 MHz
Access Time	900 ns	550 ns
Write Cycle Time	5ms	5ms
Supply Voltage Range	1.7V ~ 5.5V	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-VFDFN Exposed Pad	8-UFDFN Exposed Pad
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

Both the 24AA014T-I/MC and AT24CS01-MAHM-T maintain active product status with ROHS3 compliance and REACH unaffected regulatory standing. Selection between these parts should be based on application-specific requirements and supply chain availability.

The 24AA014T-I/MC is appropriate for applications requiring the lowest moisture sensitivity level (MSL 1) with unlimited shelf life and storage flexibility. The AT24CS01-MAHM-T offers enhanced performance characteristics with 1 MHz clock frequency and 550 ns access time, suitable for applications demanding faster I2C communication cycles, while accepting MSL 3 moisture sensitivity constraints (168-hour storage limit after moisture exposure).

Both devices support identical supply voltage ranges and operating temperatures, ensuring thermal and power delivery compatibility. Package variants (8-VFDFN vs. 8-UFDFN) are mechanically similar with exposed pad configurations, though PCB layout verification is necessary to confirm footprint compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Can AT24CS01-MAHM-T directly replace 24AA014T-I/MC in existing designs?

A: Yes, provided PCB footprint compatibility is confirmed between 8-VFDFN and 8-UFDFN packages. Both devices share identical memory capacity, I2C interface, voltage range, and temperature specifications. The substitute offers faster clock frequency and access time without compromising backward compatibility.

Q: What is the significance of the MSL rating difference?

A: MSL 1 (24AA014T-I/MC) permits unlimited storage without moisture precautions. MSL 3 (AT24CS01-MAHM-T) requires controlled storage conditions with a 168-hour limit after moisture exposure. Selection depends on manufacturing environment and component handling procedures.

Q: Are the package types interchangeable?

A: 8-VFDFN and 8-UFDFN packages are similar in pin configuration and exposed pad design but may have minor dimensional differences. PCB footprint verification is required before substitution to ensure solder pad alignment and thermal performance.

Q: Does the higher clock frequency of AT24CS01-MAHM-T affect software compatibility?

A: No. The I2C protocol remains identical, and the substitute operates at 1 MHz while maintaining full backward compatibility with 400 kHz I2C bus specifications. Existing firmware and software require no modification.

Q: What are the key parameters that must match for substitution?

A: Memory capacity (1Kbit), memory organization (128 x 8), interface protocol (I2C), supply voltage range (1.7V ~ 5.5V), and operating temperature range (-40°C ~ 85°C) must remain constant. Package type and regulatory compliance must also be verified for the specific application.

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