AT24C04C-MAHM-E Equivalent & Substitute Parts

Part Overview

The AT24C04C-MAHM-E is a 4Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz with 550 ns access time. This device is supplied in Tape & Reel packaging with 8-UDFN (2x3) surface mount configuration. The part maintains Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent memory capacity, interface protocol, voltage range, operating temperature, and package form factor align with application requirements.

Key Parameters

Parameter	Value
Memory Size	4Kbit
Memory Organization	512 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
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AT24C04C-MAHM-E is determined by the following critical parameters:

Memory capacity of 4Kbit with 512 x 8 organization
I2C serial interface protocol
Operating voltage range compatibility (minimum 1.7V supply capability)
Operating temperature range of -40°C to 85°C
Surface mount package in 8-pin UDFN or equivalent form factor
ROHS3 compliance and REACH unaffected status

Packaging format (Tape & Reel, Cut Tape, or Digi-Reel) does not affect functional equivalence. Clock frequency variations and access time differences are permitted when the substitute part meets or exceeds the specified performance envelope for the application.

Parameter Comparison

Parameter	AT24C04C-MAHM-E	AT24C04C-MAHM-T	AT24CS04-MAHM-T	BR24T04NUX-WTR	M24C04-RMC6TG
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology	Rohm Semiconductor	STMicroelectronics
Memory Size	4Kbit	4Kbit	4Kbit	4Kbit	4Kbit
Memory Organization	512 x 8	512 x 8	512 x 8	512 x 8	512 x 8
Memory Interface	I2C	I2C	I2C	I2C	I2C
Clock Frequency	1 MHz	1 MHz	1 MHz	400 kHz	400 kHz
Access Time	550 ns	550 ns	550 ns	Not specified	900 ns
Write Cycle Time	5 ms	5 ms	5 ms	5 ms	5 ms
Voltage Supply Range	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.6V ~ 5.5V	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-UDFN Exposed Pad	8-UDFN Exposed Pad	8-UDFN Exposed Pad	8-UDFN Exposed Pad	8-UDFN Exposed Pad
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, meeting regulatory requirements equivalent to the AT24C04C-MAHM-E.

AT24C04C-MAHM-T and AT24CS04-MAHM-T are Microchip Technology variants with identical electrical specifications to the main part. The primary distinction is packaging format: AT24C04C-MAHM-T is supplied in Cut Tape & Digi-Reel format, while AT24CS04-MAHM-T is supplied in Tape & Reel format.

BR24T04NUX-WTR (Rohm Semiconductor) and M24C04-RMC6TG (STMicroelectronics) operate at reduced clock frequency (400 kHz versus 1 MHz) and feature extended access time specifications. These parts are functionally compatible when system timing requirements do not mandate the higher clock frequency of the primary part.

All substitute parts share identical memory capacity, organization, I2C interface, write cycle time, operating temperature range, and surface mount package configuration. Voltage supply ranges are compatible across all options, with BR24T04NUX-WTR and M24C04-RMC6TG offering slightly extended lower voltage operation.

Frequently Asked Questions (FAQ)

Q: Can AT24C04C-MAHM-T replace AT24C04C-MAHM-E in production?

A: Yes. Both parts are manufactured by Microchip Technology with identical electrical specifications. The difference is packaging format: AT24C04C-MAHM-E is Tape & Reel, while AT24C04C-MAHM-T is Cut Tape & Digi-Reel. Functional performance and pin configuration are equivalent.

Q: What is the impact of using BR24T04NUX-WTR or M24C04-RMC6TG instead of AT24C04C-MAHM-E?

A: Both alternatives operate at 400 kHz clock frequency instead of 1 MHz. This reduces data transfer speed but maintains full functional compatibility for I2C EEPROM applications. Access time is longer (900 ns for M24C04-RMC6TG). Selection depends on whether the application requires the higher clock frequency of the primary part.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of AT24C04C-MAHM-E.

Q: Can substitute parts operate across the full voltage range of AT24C04C-MAHM-E?

A: All substitute parts operate within the 1.7V to 5.5V range specified for AT24C04C-MAHM-E. BR24T04NUX-WTR extends lower voltage operation to 1.6V, and M24C04-RMC6TG operates from 1.8V. Verify application voltage requirements before selection.

Q: What is the difference between AT24CS04-MAHM-T and AT24C04C-MAHM-T?

A: Both are Microchip Technology 4Kbit I2C EEPROM devices with identical electrical specifications. The base product numbers differ (AT24CS04 versus AT24C04C), but memory capacity, organization, interface, and performance parameters are equivalent. Packaging format is Tape & Reel for both variants.

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