AT24CS02-XHM-T EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The AT24CS02-XHM-T is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz clock frequency with 550 ns access time. This device is housed in an 8-TSSOP 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 moisture sensitivity rating (MSL 1). Substitute parts are identified based on matching core electrical parameters and mechanical compatibility while maintaining functional equivalence in I2C EEPROM applications.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	2Kbit
Memory Organization	256 x 8
Interface	I2C
Clock Frequency	1 MHz
Access Time	550 ns
Write Cycle Time	5 ms
Supply Voltage	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the AT24CS02-XHM-T are classified into two categories based on electrical parameter compatibility:

Parametric Equivalents (Full Compatibility): Parts matching all critical electrical specifications including 1 MHz clock frequency, 550 ns access time, 2Kbit capacity, and identical supply voltage range. These parts are direct functional replacements with no performance degradation.

Manufacturer Recommended Substitutes (Functional Compatibility): Parts with reduced clock frequency (400 kHz) and increased access time (900 ns) but maintaining 2Kbit capacity, I2C interface, identical supply voltage range, and 8-TSSOP package. These parts function in I2C EEPROM applications but operate at lower speed specifications. Selection depends on application timing requirements.

Extended Temperature Variant: The 34AA02T-E/ST operates at -40°C to 125°C, providing extended upper temperature range while maintaining 400 kHz clock frequency and 900 ns access time.

Critical parameters determining substitution eligibility: Memory size (2Kbit), memory organization (256 x 8), interface type (I2C), package type (8-TSSOP), supply voltage range (1.7V ~ 5.5V), and mounting type (Surface Mount).

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Supply Voltage	Operating Temperature	Package	Product Status	MSL Rating
AT24CS02-XHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	1 (Unlimited)
AT24C02C-XHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	1 (Unlimited)
AT24HC02C-XHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	1 (Unlimited)
AT24MAC402-XHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	1 (Unlimited)
AT24MAC602-XHM-T	Atmel	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	Not Specified
24AA02-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	1 (Unlimited)
24AA024-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	1 (Unlimited)
24AA024T-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	1 (Unlimited)
24AA02T-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	1 (Unlimited)
34AA02T-E/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active	1 (Unlimited)
AT34C02D-XHM-T	Microchip Technology	2Kbit	1 MHz	Not Specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	3 (168 Hours)

Engineering Selection Recommendations

For Direct Replacement (No Application Modification Required):

Select AT24C02C-XHM-T, AT24HC02C-XHM-T, AT24MAC402-XHM-T, or AT24MAC602-XHM-T when full electrical parameter matching is required. These parts maintain 1 MHz clock frequency and 550 ns access time specifications identical to AT24CS02-XHM-T. All are ROHS3 compliant with MSL 1 rating and active production status. AT24C02C-XHM-T and AT24MAC402-XHM-T carry verified DiGi-Electronics programmable status.

For Speed-Reduced Applications:

Select 24AA02-I/ST, 24AA024-I/ST, 24AA024T-I/ST, or 24AA02T-I/ST when application timing permits 400 kHz clock frequency operation and 900 ns access time. These parts maintain identical 2Kbit capacity, I2C interface, supply voltage range, and 8-TSSOP package. All are ROHS3 compliant with MSL 1 rating and active production status. 24AA024T-I/ST and 24AA02T-I/ST are available in Tape & Reel packaging with verified DiGi-Electronics programmable status.

For Extended Temperature Operation:

Select 34AA02T-E/ST when operating temperature range must extend to 125°C. This part operates at 400 kHz clock frequency with 900 ns access time while maintaining all other electrical and mechanical specifications. ROHS3 compliant with MSL 1 rating and active production status.

Moisture Sensitivity Consideration:

AT34C02D-XHM-T carries MSL 3 rating (168 hours) compared to MSL 1 (unlimited) for all other listed parts. Selection should account for storage and handling requirements in high-humidity environments.

Frequently Asked Questions (FAQ)

Q: Can 24AA02-I/ST replace AT24CS02-XHM-T in all applications?

A: 24AA02-I/ST is functionally compatible for I2C EEPROM applications but operates at reduced speed specifications. Clock frequency is 400 kHz versus 1 MHz, and access time is 900 ns versus 550 ns. Applications with timing-critical I2C bus operations may require verification before substitution.

Q: What is the difference between AT24C02C-XHM-T and AT24CS02-XHM-T?

A: Both parts share identical electrical specifications: 2Kbit capacity, 1 MHz clock frequency, 550 ns access time, 1.7V to 5.5V supply voltage, and -40°C to 85°C operating temperature. Both are housed in 8-TSSOP packages with ROHS3 compliance and MSL 1 rating. AT24C02C-XHM-T carries verified DiGi-Electronics programmable status.

Q: Are packaging differences significant for substitution?

A: Packaging format (Cut Tape, Tube, or Tape & Reel) affects handling and assembly processes but does not impact electrical or mechanical compatibility. All listed parts use identical 8-TSSOP (0.173", 4.40mm Width) surface mount package. Packaging selection depends on manufacturing assembly requirements and inventory management.

Q: Why does 34AA02T-E/ST have extended temperature range?

A: 34AA02T-E/ST operates to 125°C maximum temperature versus 85°C for other listed parts. This extended range is provided while maintaining 400 kHz clock frequency and 900 ns access time. Selection is appropriate for applications requiring higher temperature operation within the reduced speed specification.

Q: What does MSL 1 rating mean for component handling?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture control requirements. All listed parts except AT34C02D-XHM-T carry MSL 1 rating. AT34C02D-XHM-T carries MSL 3 rating, requiring storage in controlled humidity environments with maximum 168-hour floor life after moisture exposure.

Q: Can AT24MAC602-XHM-T be used as a substitute?

A: AT24MAC602-XHM-T is manufactured by Atmel and shares identical electrical specifications with AT24CS02-XHM-T: 2Kbit capacity, 1 MHz clock frequency, 550 ns access time, and 8-TSSOP package. MSL rating is not specified in available data. Compatibility depends on application requirements and Atmel part availability.

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