24AA024HT-I/SN Equivalent & Substitute Parts

Part Overview

The 24AA024HT-I/SN is a 2Kbit EEPROM memory IC with I2C interface operating at 400 kHz, manufactured by Microchip Technology. This non-volatile memory device is housed in an 8-SOIC surface mount package and operates across a supply voltage range of 1.7V to 5.5V with an operating temperature range of -40°C to 85°C. The part is currently active and ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters allow direct functional replacement in circuit applications.

Key Parameters

Parameter	Value
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5ms
Voltage Supply Range	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 24AA024HT-I/SN are categorized based on strict electrical and mechanical compatibility:

MFR Recommended Substitutes operate at 1 MHz clock frequency with 550 ns access time, representing enhanced performance variants while maintaining identical memory capacity (2Kbit, 256 x 8 organization), I2C interface, supply voltage range (1.7V ~ 5.5V), operating temperature (-40°C ~ 85°C), and 8-SOIC package specifications. These parts are direct functional replacements with improved speed characteristics.

Parametric Equivalents maintain the original 400 kHz clock frequency and 900 ns access time specifications. These parts differ only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel) or internal memory organization variants (128 x 8 x 2 dual-die configuration), while preserving all critical electrical parameters and 8-SOIC package form factor.

Substitution eligibility is determined by:

Memory Size: 2Kbit (fixed)
Memory Interface: I2C (fixed)
Package / Case: 8-SOIC (fixed)
Voltage Supply Range: 1.7V ~ 5.5V (fixed)
Operating Temperature: -40°C ~ 85°C (fixed)
Mounting Type: Surface Mount (fixed)

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Memory Organization	Voltage Supply	Operating Temp	Package	Packaging Format	Product Status	RoHS Status	MSL Rating
24AA024HT-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	256 x 8	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Tape & Reel	Active	ROHS3	1 (Unlimited)
AT24C02C-SSHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	256 x 8	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel	Active	ROHS3	3 (168 Hours)
AT24CS02-SSHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	256 x 8	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel	Active	ROHS3	1 (Unlimited)
AT24HC02C-SSHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	256 x 8	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel	Active	ROHS3	3 (168 Hours)
AT34C02D-SSHM-T	Microchip Technology	2Kbit	1 MHz	Not Specified	256 x 8	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel	Active	ROHS3	3 (168 Hours)
24AA024T-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	256 x 8	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Tape & Reel	Active	ROHS3	3 (168 Hours)
24AA025E48T-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	256 x 8	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel	Active	ROHS3	3 (168 Hours)
24AA025E64T-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	256 x 8	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Tape & Reel	Active	ROHS3	1 (Unlimited)
24AA025T-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	256 x 8	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Tape & Reel	Active	ROHS3	1 (Unlimited)
24AA025UIDT-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	128 x 8 x 2	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel	Active	ROHS3	1 (Unlimited)
24AA02E48T-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	256 x 8	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Cut Tape & Digi-Reel	Active	ROHS3	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance, meeting regulatory requirements equivalent to the 24AA024HT-I/SN. Selection between MFR Recommended Substitutes and Parametric Equivalents depends on application timing requirements. The AT24C02C-SSHM-T, AT24CS02-SSHM-T, AT24HC02C-SSHM-T, and AT34C02D-SSHM-T operate at 1 MHz with 550 ns access time, providing performance headroom for timing-critical applications. The 24AA024T-I/SN, 24AA025E48T-I/SN, 24AA025E64T-I/SN, 24AA025T-I/SN, 24AA025UIDT-I/SN, and 24AA02E48T-I/SN maintain the original 400 kHz specification with 900 ns access time, suitable for applications with existing timing margins. Packaging format selection (Tape & Reel versus Cut Tape & Digi-Reel) is determined by procurement and assembly requirements. Moisture Sensitivity Level (MSL) ratings vary between 1 (Unlimited) and 3 (168 Hours), requiring consideration of storage and handling conditions in manufacturing environments.

Frequently Asked Questions (FAQ)

Q: Can AT24C02C-SSHM-T replace 24AA024HT-I/SN directly in circuit?

A: Yes. Both parts share identical memory capacity (2Kbit, 256 x 8), I2C interface, supply voltage range (1.7V ~ 5.5V), operating temperature (-40°C ~ 85°C), and 8-SOIC package specifications. The AT24C02C-SSHM-T operates at 1 MHz with 550 ns access time versus the original 400 kHz / 900 ns, representing improved performance that is backward compatible with 400 kHz I2C bus implementations.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging?

A: Both packaging formats contain identical die and electrical specifications. Tape & Reel format is supplied on continuous carrier tape for high-volume automated assembly. Cut Tape & Digi-Reel format is supplied in smaller quantities on cut tape segments. Selection depends on production volume and assembly equipment compatibility, not electrical performance.

Q: Are parametric equivalents like 24AA025E64T-I/SN fully compatible?

A: Yes. Parametric equivalents maintain all critical electrical parameters: 2Kbit memory, 256 x 8 organization, I2C interface, 400 kHz clock frequency, 900 ns access time, 1.7V to 5.5V supply range, and -40°C to 85°C operating temperature. The 8-SOIC package pinout is identical, enabling direct PCB substitution.

Q: What does MSL rating mean for component selection?

A: Moisture Sensitivity Level (MSL) indicates maximum storage duration at specified humidity before component reflow. MSL 1 (Unlimited) allows indefinite storage. MSL 3 (168 Hours) requires use within 168 hours of package opening in high-humidity environments. Selection depends on manufacturing facility humidity control and component inventory management practices.

Q: Can 24AA025UIDT-I/SN with 128 x 8 x 2 organization replace the 256 x 8 version?

A: The 24AA025UIDT-I/SN contains identical 2Kbit total capacity but uses dual-die architecture (128 x 8 x 2) versus single-die (256 x 8). Both configurations present the same I2C interface and memory addressing to the host system. Substitution is valid for applications using standard I2C memory access protocols.

Q: Which substitute offers best availability?

A: AT24C02C-SSHM-T shows highest inventory (200,300 pcs) among MFR Recommended Substitutes. For parametric equivalents at original 400 kHz specification, 24AA025E48T-I/SN provides 16,300 pcs inventory. Availability should be confirmed with current supplier stock levels.

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