AT24MAC602-MAHM-E Equivalent & Substitute Parts

Part Overview

The AT24MAC602-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) with exposed pad, designed for surface mount applications requiring compact form factor and low power consumption. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and memory specifications are maintained across different packaging formats or manufacturer variants, enabling design flexibility and supply chain optimization.

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

Substitute parts for the AT24MAC602-MAHM-E are classified based on the following substitution criteria:

Primary Substitution Criteria (Electrical Equivalence):

Memory Size: 2Kbit
Memory Organization: 256 x 8
Memory Interface: I2C
Voltage Supply Range: 1.7V ~ 5.5V
Operating Temperature: -40°C ~ 85°C
Write Cycle Time: 5ms
RoHS3 Compliance

Secondary Substitution Criteria (Packaging & Availability):

Package Type: 8-UDFN Exposed Pad or 8-SOIC
Mounting Type: Surface Mount
Product Status: Active

Performance Variance Allowance:

Clock Frequency: 1 MHz (primary) or 400 kHz (acceptable for lower-speed applications)
Access Time: 550 ns (primary) or 900 ns (acceptable for non-time-critical applications)
Moisture Sensitivity Level: Varies (3 or 1)

Substitutes are grouped into two categories: MFR Recommended (different packaging of same base part) and Parametric Equivalents (same electrical specifications, different manufacturers or variants).

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Package Type	Packaging Format	Inventory (Pcs)
AT24MAC602-MAHM-E	Microchip Technology	2Kbit	1 MHz	550 ns	8-UDFN Exposed Pad	Tape & Reel (TR)	868
AT24MAC602-SSHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	8-SOIC (0.154", 3.90mm Width)	Cut Tape (CT) & Digi-Reel®	5511
AT24C02C-MAHM-E	Microchip Technology	2Kbit	1 MHz	550 ns	8-UDFN Exposed Pad	Tape & Reel (TR)	29067
AT24C02C-MAHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	8-UDFN Exposed Pad	Cut Tape (CT) & Digi-Reel®	81703
AT24CS02-MAHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	8-UDFN Exposed Pad	Tape & Reel (TR)	24759
AT24MAC602-MAHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	8-UDFN Exposed Pad	Tape & Reel (TR)	4620
CAT34C02HU4IGT4A	onsemi	2Kbit	400 kHz	900 ns	8-UDFN-EP (2x3)	Tape & Reel (TR)	5343

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical Performance):

AT24C02C-MAHM-E and AT24C02C-MAHM-T are parametric equivalents with identical electrical specifications to AT24MAC602-MAHM-E. Both maintain 1 MHz clock frequency, 550 ns access time, and 8-UDFN package. AT24C02C-MAHM-T offers significantly higher inventory (81,703 pcs) compared to the main part (868 pcs), providing superior supply chain availability. Both are ROHS3 compliant and Active status.

AT24CS02-MAHM-T is electrically equivalent with identical performance parameters and 8-UDFN packaging. Inventory availability is 24,759 pcs. ROHS3 compliant and Active status.

AT24MAC602-MAHM-T is the same base part number in Tape & Reel format with 4,620 pcs inventory. Identical electrical specifications and 8-UDFN package.

Packaging Variant (Same Electrical Performance, Different Package):

AT24MAC602-SSHM-T is the MFR Recommended substitute, offering identical 1 MHz clock frequency and 550 ns access time in 8-SOIC package instead of 8-UDFN. This variant provides higher inventory (5,511 pcs) and lower Moisture Sensitivity Level (MSL 1 vs MSL 3). Selection requires PCB layout compatibility with 8-SOIC footprint.

Cross-Manufacturer Equivalent (Reduced Performance Tolerance):

CAT34C02HU4IGT4A from onsemi is a parametric equivalent with 2Kbit capacity and I2C interface in 8-UDFN-EP package. Clock frequency is reduced to 400 kHz and access time is 900 ns. This part is suitable for applications where lower I2C bus speed is acceptable. MSL rating is 1 (Unlimited). ROHS3 compliant and Active status. Inventory is 5,343 pcs.

Selection Criteria:

For maximum supply availability with identical performance: AT24C02C-MAHM-T
For same base part number: AT24MAC602-MAHM-T
For alternative package format: AT24MAC602-SSHM-T
For cross-manufacturer option with lower speed tolerance: CAT34C02HU4IGT4A

Frequently Asked Questions (FAQ)

Q: Can AT24C02C-MAHM-E replace AT24MAC602-MAHM-E directly?

A: Yes. Both parts maintain identical electrical specifications: 2Kbit capacity, 256 x 8 organization, I2C interface, 1 MHz clock frequency, 550 ns access time, 5ms write cycle time, 1.7V–5.5V supply range, and -40°C to 85°C operating temperature. Both use 8-UDFN Exposed Pad package. ROHS3 compliance and Active status are equivalent.

Q: What is the difference between AT24MAC602-MAHM-E and AT24MAC602-SSHM-T?

A: The primary difference is package type. AT24MAC602-MAHM-E uses 8-UDFN Exposed Pad (2x3), while AT24MAC602-SSHM-T uses 8-SOIC (0.154", 3.90mm Width). Electrical performance is identical. Packaging format differs: MAHM-E is Tape & Reel (TR), SSHM-T is Cut Tape (CT) & Digi-Reel®. Moisture Sensitivity Level is lower for SSHM-T (MSL 1 vs MSL 3).

Q: Is CAT34C02HU4IGT4A a suitable replacement?

A: CAT34C02HU4IGT4A is electrically compatible for applications tolerating reduced I2C bus speed. Clock frequency is 400 kHz (vs 1 MHz) and access time is 900 ns (vs 550 ns). Memory capacity, organization, interface, voltage range, and temperature range remain identical. This part is suitable for non-time-critical applications. Package is 8-UDFN-EP with MSL 1 rating.

Q: Why are there multiple Microchip variants (AT24MAC602, AT24C02C, AT24CS02)?

A: These are different product lines within Microchip's EEPROM portfolio, each with distinct internal architecture or feature sets, but sharing identical electrical performance parameters for this 2Kbit I2C application. All maintain 1 MHz operation, 550 ns access time, and 8-UDFN packaging. Selection depends on specific application requirements and supply availability.

Q: What packaging formats are available?

A: Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats are available across the substitute parts. Package types are 8-UDFN Exposed Pad (primary) and 8-SOIC (alternative). Selection depends on assembly process requirements and PCB layout compatibility.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the main part AT24MAC602-MAHM-E. All are Active status products.

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