AT24CS08-MAHM-E Equivalent & Substitute Parts

Part Overview

The AT24CS08-MAHM-E is an 8Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz with 550 ns access time. The device is housed in an 8-UDFN (2x3) surface mount package and operates across a supply 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 with ROHS3 compliance and unlimited availability. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package form factor, and electrical operating parameters to ensure direct functional replacement in circuit applications.

Key Parameters

Parameter	Value
Memory Size	8Kbit
Memory Organization	1K 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 AT24CS08-MAHM-E are classified based on the following substitution criteria:

Primary Equivalence Parameters:

Memory capacity: 8Kbit
Memory organization: 1K x 8
Interface protocol: I2C
Package form factor: 8-UDFN Exposed Pad
Operating temperature range: -40°C to 85°C
Supply voltage compatibility: 1.7V ~ 5.5V minimum

Parametric Equivalents maintain identical or superior electrical specifications including clock frequency, access time, and write cycle time. These parts are direct functional replacements with no circuit redesign required.

Manufacturer Recommended Alternatives meet core memory and interface requirements but may operate at reduced clock frequencies (400 kHz vs. 1 MHz) or have different access time specifications. These parts are functionally compatible for applications not requiring maximum speed performance.

Packaging Variants include different supplier device packages (8-UDFN vs. VSON008X2030) but maintain identical electrical functionality and 8-UDFN Exposed Pad case outline compatibility for PCB layout purposes.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Package	Packaging Type	Inventory Status
AT24CS08-MAHM-E	Microchip Technology	8Kbit	1 MHz	550 ns	1.7V ~ 5.5V	8-UDFN (2x3)	Tape & Reel	9913 Pcs
AT24C08C-MAHM-E	Microchip Technology	8Kbit	1 MHz	550 ns	1.7V ~ 5.5V	8-UDFN (2x3)	Tape & Reel	15814 Pcs
AT24C08C-MAHM-T	Microchip Technology	8Kbit	1 MHz	550 ns	1.7V ~ 5.5V	8-UDFN (2x3)	Cut Tape & Digi-Reel	5400 Pcs
BR24G08NUX-3ATTR	Rohm Semiconductor	8Kbit	1 MHz	Not Specified	1.6V ~ 5.5V	VSON008X2030	Tape & Reel	5106 Pcs
BR24G08NUX-3TTR	Rohm Semiconductor	8Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	VSON008X2030	Tape & Reel	8000 Pcs
CAT24C08HU4I-GT3	onsemi	8Kbit	400 kHz	900 ns	1.7V ~ 5.5V	8-UDFN-EP (2x3)	Cut Tape & Digi-Reel	18008 Pcs
M24C08-FMC6TG	STMicroelectronics	8Kbit	400 kHz	900 ns	1.7V ~ 5.5V	8-UFDFPN (2x3)	Cut Tape & Digi-Reel	7603 Pcs

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred for 1:1 Replacement):

AT24C08C-MAHM-E and AT24C08C-MAHM-T are parametric equivalents of the AT24CS08-MAHM-E, offering identical electrical specifications including 1 MHz clock frequency and 550 ns access time. Both parts maintain ROHS3 compliance and identical supply voltage range. Selection between these two depends on packaging requirements: AT24C08C-MAHM-E is supplied in Tape & Reel format with higher inventory (15814 Pcs), while AT24C08C-MAHM-T is available in Cut Tape & Digi-Reel format (5400 Pcs).

Manufacturer Recommended Alternatives (Reduced Speed Operation):

BR24G08NUX-3ATTR (Rohm Semiconductor) operates at 1 MHz matching the main part's clock frequency, with extended supply voltage range down to 1.6V and improved moisture sensitivity level (MSL 1 vs. MSL 3). BR24G08NUX-3TTR operates at reduced 400 kHz clock frequency and is suitable for applications not requiring maximum I2C speed performance.

CAT24C08HU4I-GT3 (onsemi) and M24C08-FMC6TG (STMicroelectronics) both operate at 400 kHz with 900 ns access time. These parts are suitable for standard I2C bus operation where 400 kHz is the typical industrial standard. CAT24C08HU4I-GT3 carries DiGi-Electronics Programmable verification status and offers the highest inventory availability (18008 Pcs).

Compliance and Certification Status:

All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the main part. All parts are classified under ECCN EAR99 and HTSUS 8542.32.0051.

Frequently Asked Questions (FAQ)

Q: Can AT24C08C-MAHM-E be used as a direct replacement for AT24CS08-MAHM-E?

A: Yes. AT24C08C-MAHM-E is a parametric equivalent with identical memory capacity (8Kbit), interface (I2C), clock frequency (1 MHz), access time (550 ns), supply voltage range (1.7V ~ 5.5V), and package (8-UDFN 2x3). No circuit modifications are required.

Q: What is the difference between AT24C08C-MAHM-E and AT24C08C-MAHM-T?

A: Both parts are electrically identical. The difference is in packaging format: AT24C08C-MAHM-E is supplied in Tape & Reel (TR) format, while AT24C08C-MAHM-T is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on assembly line requirements and minimum order quantities.

Q: Can I use BR24G08NUX-3ATTR or BR24G08NUX-3TTR as substitutes?

A: BR24G08NUX-3ATTR operates at 1 MHz and is compatible with the main part's speed requirements. BR24G08NUX-3TTR operates at 400 kHz and is suitable only for applications where reduced I2C bus speed is acceptable. Both use VSON008X2030 package instead of 8-UDFN but maintain compatible exposed pad form factor.

Q: What are the key differences between 1 MHz and 400 kHz clock frequency options?

A: The AT24CS08-MAHM-E operates at 1 MHz, supporting faster I2C communication. Substitute parts operating at 400 kHz (CAT24C08HU4I-GT3, M24C08-FMC6TG, BR24G08NUX-3TTR) are compatible with standard I2C bus specifications but transfer data at reduced speed. Selection depends on application timing requirements.

Q: Are there package compatibility concerns when substituting with Rohm or STMicroelectronics parts?

A: BR24G08NUX-3ATTR and BR24G08NUX-3TTR use VSON008X2030 package while M24C08-FMC6TG uses 8-UFDFPN package. Both maintain 8-UDFN Exposed Pad case outline compatibility for PCB layout. Verify footprint compatibility with your PCB design before substitution.

Q: Which substitute part offers the best inventory availability?

A: CAT24C08HU4I-GT3 (onsemi) offers the highest inventory with 18008 Pcs in stock, followed by AT24C08C-MAHM-E (Microchip) with 15814 Pcs. Both parts are immediately available for production requirements.

Q: Do all substitute parts meet the same temperature and voltage specifications?

A: All substitute parts operate across -40°C to 85°C temperature range. Supply voltage ranges are 1.7V ~ 5.5V for Microchip, onsemi, and STMicroelectronics parts, while Rohm parts extend down to 1.6V minimum, providing broader low-voltage compatibility.

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