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24LC024HT-E/ST EEPROM Memory IC Equivalent & Substitute Parts
Part Overview
The 24LC024HT-E/ST is a 2Kbit I2C EEPROM memory IC manufactured by Microchip Technology, packaged in 8-TSSOP surface mount configuration. This non-volatile memory device operates at 1 MHz clock frequency with 400 ns access time and supports supply voltages from 2.5V to 5.5V across an operating temperature range of -40°C to 125°C. The device is ROHS3 compliant and currently in active production status. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package type, and electrical operating parameters to ensure functional compatibility in circuit applications.
Substiute Parts
Key Parameters
| Parameter | 24LC024HT-E/ST |
|---|---|
| Memory Size | 2Kbit |
| Memory Organization | 256 x 8 |
| Memory Interface | I2C |
| Clock Frequency | 1 MHz |
| Access Time | 400 ns |
| Write Cycle Time | 5 ms |
| Voltage Supply Range | 2.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 125°C |
| Package Type | 8-TSSOP |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitute parts for the 24LC024HT-E/ST are qualified based on the following critical parameters:
- Memory capacity of 2Kbit with 256 x 8 organization
- I2C serial interface protocol
- 8-TSSOP surface mount package (0.173" width, 4.40mm)
- Non-volatile EEPROM technology
- Write cycle time of 4-5 ms
- Supply voltage compatibility within or overlapping the 2.5V ~ 5.5V range
- Operating temperature range supporting -40°C minimum and 125°C maximum, or subset thereof
- ROHS3 compliance and active product status
Substitutes are grouped into two categories: direct equivalents operating at 1 MHz clock frequency with matching access time specifications, and functional alternatives operating at 400 kHz with extended access time but maintaining core memory and interface compatibility.
Parameter Comparison
| Part Number | Manufacturer | Memory Size | Clock Frequency | Access Time | Write Cycle Time | Voltage Supply | Operating Temperature | Package |
|---|---|---|---|---|---|---|---|---|
| 24LC024HT-E/ST | Microchip Technology | 2Kbit | 1 MHz | 400 ns | 5 ms | 2.5V ~ 5.5V | -40°C ~ 125°C | 8-TSSOP |
| 34AA02T-E/ST | Microchip Technology | 2Kbit | 400 kHz | 900 ns | 5 ms | 1.7V ~ 5.5V | -40°C ~ 125°C | 8-TSSOP |
| BR24G02FVT-3GE2 | Rohm Semiconductor | 2Kbit | 400 kHz | Not specified | 5 ms | 1.6V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP-B |
| BR34E02FVT-3E2 | Rohm Semiconductor | 2Kbit | 400 kHz | Not specified | 5 ms | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP-B |
| CAT34C02YI-GT5A | onsemi | 2Kbit | 400 kHz | 900 ns | 5 ms | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP |
| CAV24C02YE-GT3 | onsemi | 2Kbit | 400 kHz | 900 ns | 5 ms | 2.5V ~ 5.5V | -40°C ~ 125°C | 8-TSSOP |
| M24C02-DRDW3TP/K | STMicroelectronics | 2Kbit | 1 MHz | 450 ns | 4 ms | 1.8V ~ 5.5V | -40°C ~ 125°C | 8-TSSOP |
| M24C02-DRDW8TP/K | STMicroelectronics | 2Kbit | 1 MHz | 450 ns | 4 ms | 1.8V ~ 5.5V | -40°C ~ 105°C | 8-TSSOP |
| M34E02-FDW6TP | STMicroelectronics | 2Kbit | 400 kHz | 900 ns | 5 ms | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP |
| R1EX24002ATAS0I#U0 | Renesas Electronics Corporation | 2Kbit | 400 kHz | 900 ns | 5 ms | 1.8V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP |
Engineering Selection Recommendations
Direct Performance Equivalents (1 MHz Operation):
The M24C02-DRDW3TP/K and M24C02-DRDW8TP/K from STMicroelectronics provide the closest functional match to the 24LC024HT-E/ST, maintaining 1 MHz clock frequency operation with comparable access time (450 ns vs. 400 ns) and improved write cycle time (4 ms vs. 5 ms). Both devices carry AEC-Q100 automotive qualification and support the full -40°C to 125°C temperature range. The M24C02-DRDW3TP/K operates to 125°C while the M24C02-DRDW8TP/K is rated to 105°C. Both are ROHS3 compliant and in active production.
Extended Temperature Range Alternative:
The CAV24C02YE-GT3 from onsemi operates at 400 kHz with 900 ns access time but maintains the full 2.5V ~ 5.5V supply voltage range and -40°C to 125°C operating temperature specification matching the original device. This part carries AEC-Q100 automotive qualification and is suitable for applications where clock frequency reduction is acceptable but temperature range coverage is critical.
Standard Industrial Alternatives:
The 34AA02T-E/ST from Microchip Technology and M34E02-FDW6TP from STMicroelectronics both operate at 400 kHz with 900 ns access time. The 34AA02T-E/ST supports -40°C to 125°C operation with extended supply voltage range (1.7V ~ 5.5V), while the M34E02-FDW6TP is rated to -40°C to 85°C with verified DiGi-Electronics programmability status.
Lower Voltage Supply Applications:
The BR24G02FVT-3GE2 and BR34E02FVT-3E2 from Rohm Semiconductor support minimum supply voltages of 1.6V and 1.7V respectively, suitable for battery-powered or low-voltage applications. Both operate at 400 kHz and are rated to -40°C to 85°C.
Frequently Asked Questions (FAQ)
Q: Can I substitute the 24LC024HT-E/ST with a 400 kHz device in my application?
A: Substitution with 400 kHz alternatives is possible if your application does not require 1 MHz clock frequency operation. The 34AA02T-E/ST, CAV24C02YE-GT3, CAT34C02YI-GT5A, M34E02-FDW6TP, and R1EX24002ATAS0I#U0 all maintain 2Kbit capacity, I2C interface, and 8-TSSOP packaging. Verify that your I2C bus timing and application firmware support the reduced clock frequency before implementation.
Q: Which substitute offers the best temperature range coverage?
A: The 34AA02T-E/ST, CAV24C02YE-GT3, M24C02-DRDW3TP/K, and M24C02-DRDW8TP/K all support the full -40°C to 125°C operating temperature range. The CAV24C02YE-GT3 additionally maintains the original 2.5V ~ 5.5V supply voltage specification while providing automotive AEC-Q100 qualification.
Q: Are all substitute parts available in 8-TSSOP packaging?
A: All listed substitutes are available in 8-TSSOP or 8-TSSOP-B packaging. The Rohm Semiconductor parts (BR24G02FVT-3GE2 and BR34E02FVT-3E2) use the 8-TSSOP-B variant, which maintains the same 0.173" width and 4.40mm dimensions as the standard 8-TSSOP package used by the original device.
Q: What is the difference between the M24C02-DRDW3TP/K and M24C02-DRDW8TP/K?
A: Both devices operate at 1 MHz with 450 ns access time and 4 ms write cycle time. The primary difference is operating temperature range: the M24C02-DRDW3TP/K is rated to 125°C while the M24C02-DRDW8TP/K is rated to 105°C. Both carry AEC-Q100 automotive qualification and ROHS3 compliance.
Q: Can I use a lower voltage rated device if my circuit operates at 3.3V?
A: Yes, if your application operates at 3.3V, any substitute with a supply voltage range that includes 3.3V is compatible. All listed substitutes support 3.3V operation. However, verify the minimum supply voltage specification: devices rated 1.6V ~ 5.5V or 1.7V ~ 5.5V provide additional margin for low-voltage applications compared to the original 2.5V ~ 5.5V specification.
Q: Which substitute has the fastest access time?
A: The 24LC024HT-E/ST original device and M24C02-DRDW3TP/K both provide the fastest access times at 400 ns and 450 ns respectively. All 400 kHz alternatives operate with 900 ns access time, which is acceptable for most I2C EEPROM applications but represents a 2.25x increase in access latency.
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