Equivalent & Substitute Parts for 24LC024HT-I/ST

Part Overview

The 24LC024HT-I/ST is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz with 400 ns access time. This device is packaged in 8-TSSOP surface mount configuration and is ROHS3 compliant. The part is currently active in production with 753 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained within the allowed specifications for this EEPROM category, particularly when packaging format or clock frequency variations do not impact system-level functionality.

Key Parameters

Parameter	Value
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	1 MHz
Access Time	400 ns
Write Cycle Time	5ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 24LC024HT-I/ST is determined by the following critical parameters:

Core Electrical Compatibility:

Memory size must remain 2Kbit (256 x 8 organization)
I2C interface protocol must be maintained
Supply voltage range must encompass or be compatible with 2.5V ~ 5.5V
Operating temperature range must support -40°C ~ 85°C minimum

Mechanical Compatibility:

Package must be 8-TSSOP form factor
Surface mount mounting type required

Performance Considerations:

Clock frequency may vary (1 MHz or 400 kHz acceptable)
Access time may vary (400 ns, 550 ns, or 900 ns acceptable)
Write cycle time remains constant at 5ms across all variants

Substitute parts are grouped into two categories: direct packaging equivalents and functional equivalents with alternative clock frequencies. Parts with extended temperature ranges (-40°C ~ 125°C) or lower minimum supply voltages (1.7V) represent enhanced specifications and remain compatible with the original design requirements.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Packaging Format	Inventory
24LC024HT-I/ST	Microchip Technology	2Kbit	1 MHz	400 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Tape & Reel	753
24LC024H-I/ST	Microchip Technology	2Kbit	1 MHz	400 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Tube	1582
24AA024T-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Tape & Reel	2100
24AA02T-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Tape & Reel	3592
24LC024T-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Cut Tape & Digi-Reel	10400
24LC025T-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Tape & Reel	1946
24LC02BT-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Cut Tape & Digi-Reel	7900
34AA02T-E/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Tape & Reel	2040
AT24CS02-XHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Cut Tape & Digi-Reel	15684
AT24HC02C-XHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Cut Tape & Digi-Reel	5546
AT34C02D-XHM-T	Microchip Technology	2Kbit	1 MHz	Not Specified	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Cut Tape & Digi-Reel	7447

Engineering Selection Recommendations

Direct Equivalent (Identical Electrical Performance): The 24LC024H-I/ST provides identical electrical specifications to the 24LC024HT-I/ST with the only difference being packaging format (Tube versus Tape & Reel). Both parts are ROHS3 compliant and active in production status. Selection between these two depends solely on assembly line packaging requirements.

1 MHz Clock Frequency Alternatives: The AT24CS02-XHM-T and AT24HC02C-XHM-T maintain the 1 MHz clock frequency of the original part while offering extended supply voltage compatibility (1.7V minimum versus 2.5V minimum). Access time is slightly degraded to 550 ns compared to 400 ns. The AT34C02D-XHM-T also operates at 1 MHz with 1.7V ~ 5.5V supply range. All three parts are ROHS3 compliant and active in production.

400 kHz Clock Frequency Alternatives: The 24AA024T-I/ST, 24AA02T-I/ST, 24LC024T-I/ST, 24LC025T-I/ST, 24LC02BT-I/ST, and 34AA02T-E/ST operate at 400 kHz with 900 ns access time. These parts are suitable for applications where reduced clock frequency is acceptable. The 24AA024T-I/ST and 24AA02T-I/ST offer extended supply voltage range (1.7V minimum). The 34AA02T-E/ST provides extended operating temperature range (-40°C ~ 125°C). All parts are ROHS3 compliant and active in production.

Compliance Status: All substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification consistent with the original part. Moisture sensitivity level remains at MSL 1 (Unlimited) across all variants except AT34C02D-XHM-T which specifies MSL 3 (168 Hours).

Frequently Asked Questions (FAQ)

Q: Can I substitute a 400 kHz part for the 1 MHz 24LC024HT-I/ST? A: Yes. The 400 kHz variants (24AA024T-I/ST, 24AA02T-I/ST, 24LC024T-I/ST, 24LC025T-I/ST, 24LC02BT-I/ST, 34AA02T-E/ST) maintain all core electrical parameters including 2Kbit memory size, I2C interface, 256 x 8 organization, and 5ms write cycle time. The reduced clock frequency and increased access time (900 ns versus 400 ns) are acceptable substitutions when system timing requirements do not mandate 1 MHz operation.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging? A: Both packaging formats contain identical electronic components in 8-TSSOP configuration. Tape & Reel packaging uses continuous tape spooling, while Cut Tape & Digi-Reel provides pre-cut tape segments. Selection depends on assembly equipment compatibility and volume requirements. The 24LC024HT-I/ST uses Tape & Reel format.

Q: Are parts with 1.7V minimum supply voltage compatible with 2.5V ~ 5.5V designs? A: Yes. Parts specifying 1.7V ~ 5.5V supply range are fully compatible with designs requiring 2.5V ~ 5.5V operation. The lower minimum voltage specification represents an enhanced capability that does not affect compatibility with higher voltage thresholds.

Q: Can I use a part with extended temperature range (-40°C ~ 125°C) in place of the standard -40°C ~ 85°C part? A: Yes. The 34AA02T-E/ST with -40°C ~ 125°C operating range exceeds the original specification and is fully compatible. Extended temperature capability does not impact functionality within the original operating window.

Q: What is the significance of MSL 3 (168 Hours) versus MSL 1 (Unlimited)? A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions before soldering. MSL 1 (Unlimited) allows indefinite storage without moisture control. MSL 3 (168 Hours) requires moisture control and limits storage to 168 hours after packaging opening. The AT34C02D-XHM-T with MSL 3 requires stricter handling procedures compared to MSL 1 parts.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance consistent with the 24LC024HT-I/ST, ensuring compatibility with environmental and regulatory requirements.

Q: Which substitute part offers the highest inventory availability? A: The AT24CS02-XHM-T provides the highest inventory with 15,684 units in stock, followed by 24LC024T-I/ST with 10,400 units. Both parts are ROHS3 compliant and active in production.

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