AT24MAC602-MAHM-T EEPROM Equivalent & Substitute Parts

Part Overview

The AT24MAC602-MAHM-T is a 2Kbit I2C EEPROM memory IC manufactured by Microchip Technology, packaged in 8-UDFN (2x3) with exposed pad. This non-volatile memory device operates at 1 MHz clock frequency with 550 ns access time and supports supply voltages from 1.7V to 5.5V across the industrial temperature range of -40°C to 85°C. The device is ROHS3 compliant and carries MSL 3 moisture sensitivity rating. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package form factor, and electrical operating parameters to ensure functional interchangeability in circuit applications.

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	5 ms
Voltage Supply Range	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-UDFN Exposed Pad (2x3)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the AT24MAC602-MAHM-T are classified into two categories based on substitution compatibility:

Parametric Equivalents (Microchip Technology): AT24C02C-MAHM-E, AT24C02C-MAHM-T, and AT24CS02-MAHM-T maintain identical electrical specifications including 2Kbit capacity, 256 x 8 organization, I2C interface, 1 MHz clock frequency, 550 ns access time, 5 ms write cycle time, 1.7V–5.5V supply range, and -40°C to 85°C operating temperature. These parts differ only in packaging format (Tape & Reel vs. Cut Tape & Digi-Reel) and base product designation. All are ROHS3 compliant with MSL 3 rating.

Manufacturer Recommended Alternatives (Cross-Manufacturer): BR24L02NUX-WTR, BR24T02NUX-WTR, CAT34C02HU4IGT4A, M24C02-FMC6TG, M24C02-RMC6TG, M34E02-FMC6TG, and S-24C02DI-A8T1U5 provide functional substitution with the following key parameter alignment: 2Kbit memory capacity, 256 x 8 organization, I2C interface, 5 ms write cycle time, -40°C to 85°C operating temperature, and ROHS3 compliance. These alternatives operate at reduced clock frequencies (400 kHz) with longer access times (900 ns or 500 ns) and feature improved moisture sensitivity ratings (MSL 1). Supply voltage ranges vary slightly by manufacturer but remain compatible with standard 3.3V and 5V logic systems.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	MSL Rating	RoHS Status
AT24MAC602-MAHM-T	Microchip	2Kbit	1 MHz	550 ns	1.7V–5.5V	-40°C–85°C	8-UDFN (2x3)	3	ROHS3
AT24C02C-MAHM-E	Microchip	2Kbit	1 MHz	550 ns	1.7V–5.5V	-40°C–85°C	8-UDFN (2x3)	3	ROHS3
AT24C02C-MAHM-T	Microchip	2Kbit	1 MHz	550 ns	1.7V–5.5V	-40°C–85°C	8-UDFN (2x3)	3	ROHS3
AT24CS02-MAHM-T	Microchip	2Kbit	1 MHz	550 ns	1.7V–5.5V	-40°C–85°C	8-UDFN (2x3)	3	ROHS3
BR24L02NUX-WTR	Rohm Semiconductor	2Kbit	400 kHz	Not specified	1.8V–5.5V	-40°C–85°C	VSON008X2030	1	ROHS3
BR24T02NUX-WTR	Rohm Semiconductor	2Kbit	400 kHz	Not specified	1.6V–5.5V	-40°C–85°C	VSON008X2030	1	ROHS3
CAT34C02HU4IGT4A	onsemi	2Kbit	400 kHz	900 ns	1.7V–5.5V	-40°C–85°C	8-UDFN-EP (2x3)	1	ROHS3
M24C02-FMC6TG	STMicroelectronics	2Kbit	400 kHz	900 ns	1.7V–5.5V	-40°C–85°C	8-UFDFPN (2x3)	1	ROHS3
M24C02-RMC6TG	STMicroelectronics	2Kbit	400 kHz	900 ns	1.8V–5.5V	-40°C–85°C	8-UFDFPN (2x3)	1	ROHS3
M34E02-FMC6TG	STMicroelectronics	2Kbit	400 kHz	900 ns	1.7V–5.5V	-40°C–85°C	8-UFDFPN (2x3)	1	ROHS3
S-24C02DI-A8T1U5	ABLIC Inc.	2Kbit	1 MHz	500 ns	1.7V–5.5V	-40°C–85°C	8-DFN (2x3)	1	ROHS3

Engineering Selection Recommendations

Direct Parametric Equivalents: AT24C02C-MAHM-E, AT24C02C-MAHM-T, and AT24CS02-MAHM-T are recommended as primary substitutes when maintaining identical electrical performance and MSL 3 moisture sensitivity is required. These Microchip parts preserve 1 MHz clock frequency and 550 ns access time specifications. Selection between these three depends on packaging format availability: Tape & Reel (TR) for AT24C02C-MAHM-E and AT24CS02-MAHM-T, or Cut Tape & Digi-Reel for AT24C02C-MAHM-T.

Cross-Manufacturer Alternatives: S-24C02DI-A8T1U5 (ABLIC Inc.) maintains 1 MHz clock frequency with 500 ns access time and MSL 1 rating, making it suitable for applications where improved moisture tolerance is beneficial. BR24L02NUX-WTR (Rohm Semiconductor) is verified as DiGi-Electronics programmable and carries MSL 1 rating with extended supply voltage range down to 1.8V. CAT34C02HU4IGT4A (onsemi), M24C02-FMC6TG, M24C02-RMC6TG, and M34E02-FMC6TG (STMicroelectronics) operate at 400 kHz with 900 ns access time and MSL 1 rating, suitable for applications where reduced clock frequency is acceptable and improved moisture sensitivity is advantageous.

All substitute parts maintain ROHS3 compliance, I2C interface protocol, 2Kbit capacity, 256 x 8 organization, 5 ms write cycle time, and -40°C to 85°C operating temperature range. Selection should account for specific application timing requirements, supply voltage constraints, and environmental moisture exposure conditions.

Frequently Asked Questions (FAQ)

Q: Can AT24C02C-MAHM-T replace AT24MAC602-MAHM-T directly? A: Yes. AT24C02C-MAHM-T is a parametric equivalent with identical electrical specifications: 2Kbit capacity, I2C interface, 1 MHz clock frequency, 550 ns access time, 1.7V–5.5V supply range, and -40°C to 85°C operating temperature. The difference is packaging format (Cut Tape & Digi-Reel vs. Tape & Reel). Both use 8-UDFN (2x3) package with exposed pad and carry ROHS3 compliance with MSL 3 rating.

Q: What is the key difference between Microchip equivalents and cross-manufacturer alternatives? A: Microchip equivalents (AT24C02C series) maintain 1 MHz clock frequency and 550 ns access time with MSL 3 rating. Cross-manufacturer alternatives from Rohm, onsemi, STMicroelectronics, and ABLIC operate at reduced clock frequencies (400 kHz or 1 MHz) with longer access times (500–900 ns) and improved moisture sensitivity (MSL 1). All maintain 2Kbit capacity, I2C interface, and -40°C to 85°C temperature range.

Q: Are package differences between 8-UDFN, 8-UFDFPN, VSON008X2030, and 8-DFN significant? A: All substitute parts use 8-pin surface-mount packages with 2x3 mm footprints and exposed pads. Physical dimensions and pin configurations are compatible for PCB layout purposes. Verify specific package drawings with manufacturer datasheets if tight layout constraints exist.

Q: Which substitute part offers the best moisture tolerance? A: BR24L02NUX-WTR, BR24T02NUX-WTR, CAT34C02HU4IGT4A, M24C02-FMC6TG, M24C02-RMC6TG, M34E02-FMC6TG, and S-24C02DI-A8T1U5 all carry MSL 1 rating (unlimited moisture exposure), compared to MSL 3 (168 hours) for the original AT24MAC602-MAHM-T and Microchip equivalents. MSL 1 rated parts are preferred for applications with extended storage or high-humidity environments.

Q: Can I use a 400 kHz part in place of a 1 MHz part? A: Yes, if application timing permits. 400 kHz alternatives (Rohm BR24 series, onsemi CAT34C02, STMicroelectronics M24C02/M34E02) operate at reduced clock frequency with longer access times (900 ns vs. 550 ns). This is acceptable for non-time-critical I2C communication. Verify I2C bus timing requirements in your application before substitution.

Q: What supply voltage range should I verify for cross-manufacturer parts? A: Most alternatives support 1.7V–5.5V range matching the original part. Exceptions: BR24T02NUX-WTR (1.6V–5.5V) and M24C02-RMC6TG (1.8V–5.5V). Confirm your application's minimum supply voltage against the selected substitute part's datasheet.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance status, matching the original AT24MAC602-MAHM-T. REACH status is unaffected for all parts.

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