AT24MAC402-MAHM-E Equivalent & Substitute Parts

Part Overview

The AT24MAC402-MAHM-E is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz with 550 ns access time. This non-volatile memory device is packaged in 8-UDFN (2x3) surface mount configuration and operates across a wide voltage range of 1.7V to 5.5V with temperature range of -40°C to 85°C. The part is currently in active production status and ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and memory organization are maintained while accommodating different packaging formats or manufacturing variants.

Key Parameters

Parameter	Value
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	1 MHz
Access Time	550 ns
Write Cycle Time	5ms
Voltage Supply Range	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-UDFN Exposed Pad
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the AT24MAC402-MAHM-E is determined by strict equivalence in the following electrical and functional parameters: 2Kbit memory capacity, 256 x 8 memory organization, I2C interface protocol, 1 MHz clock frequency, 550 ns access time, 5ms write cycle time, 1.7V to 5.5V supply voltage range, and -40°C to 85°C operating temperature. All identified substitutes maintain these core electrical specifications. Packaging variants (8-UDFN, 8-SOIC) and tape/reel configurations represent the primary differences among equivalent parts. Manufacturing variants within the AT24 series (AT24C02C, AT24CS02, AT24MAC602) are included based on identical functional parameters and memory organization.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Memory Organization	Interface	Clock Frequency	Access Time	Supply Voltage	Operating Temperature	Package	Packaging Format	Inventory
AT24MAC402-MAHM-E	Microchip Technology	2Kbit	256 x 8	I2C	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-UDFN	Tape & Reel	1107 Pcs
AT24MAC402-SSHM-T	Microchip Technology	2Kbit	256 x 8	I2C	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel	17100 Pcs
AT24C02C-MAHM-E	Microchip Technology	2Kbit	256 x 8	I2C	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-UDFN	Tape & Reel	29067 Pcs
AT24C02C-MAHM-T	Microchip Technology	2Kbit	256 x 8	I2C	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-UDFN	Cut Tape & Digi-Reel	81703 Pcs
AT24CS02-MAHM-T	Microchip Technology	2Kbit	256 x 8	I2C	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-UDFN	Tape & Reel	24759 Pcs
AT24MAC602-MAHM-T	Microchip Technology	2Kbit	256 x 8	I2C	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-UDFN	Tape & Reel	4620 Pcs

Engineering Selection Recommendations

All substitute parts listed maintain active product status with ROHS3 compliance and REACH unaffected designation. Selection between AT24MAC402-MAHM-E and equivalent parts should be based on packaging requirements and supply availability. AT24MAC402-SSHM-T provides the same electrical functionality in 8-SOIC package format with higher inventory availability (17100 Pcs) and MSL rating of 1 (Unlimited) versus MSL 3 (168 Hours) for the original part. AT24C02C-MAHM-T offers the same 8-UDFN package with significantly higher inventory (81703 Pcs) and identical electrical specifications. AT24C02C-MAHM-E and AT24CS02-MAHM-T maintain identical package and electrical parameters with substantial inventory levels. AT24MAC602-MAHM-T provides equivalent functionality with lower inventory availability (4620 Pcs). All parts are manufactured by Microchip Technology and share identical compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can AT24MAC402-SSHM-T replace AT24MAC402-MAHM-E in my design?

A: Yes, electrically equivalent. The primary difference is package format: AT24MAC402-SSHM-T uses 8-SOIC (0.154", 3.90mm Width) versus 8-UDFN (2x3) for the original part. PCB layout and footprint must accommodate the different package dimensions. MSL rating differs (1 versus 3), which may affect storage and handling requirements.

Q: What is the difference between AT24C02C and AT24MAC402 variants?

A: Both maintain identical electrical specifications: 2Kbit memory, 256 x 8 organization, I2C interface, 1 MHz operation, 550 ns access time, and 5ms write cycle time. Differences are manufacturing variants within the Microchip AT24 EEPROM family. Selection can be based on inventory availability and packaging format preference.

Q: Are all substitutes ROHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of AT24MAC402-MAHM-E.

Q: Which substitute has the best availability?

A: AT24C02C-MAHM-T offers the highest inventory at 81703 Pcs in Cut Tape & Digi-Reel packaging with identical 8-UDFN package format to the original part.

Q: Do all substitutes operate at the same voltage and temperature range?

A: Yes, all substitute parts operate across 1.7V to 5.5V supply voltage and -40°C to 85°C temperature range, matching the original AT24MAC402-MAHM-E specifications.

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