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Equivalent & Substitute Parts for 24LCS52/ST
Part Overview
The 24LCS52/ST is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface with 400 kHz clock frequency and 900 ns access time in an 8-TSSOP surface mount package. This component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity level. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same memory capacity, interface protocol, and package form factor.
Substiute Parts
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 | 2.2V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°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 24LCS52/ST is determined by strict equivalence in the following parameters:
Critical Matching Parameters:
- Memory Size: 2Kbit (256 x 8 organization)
- Memory Interface: I2C protocol
- Package / Case: 8-TSSOP form factor with 0.173" width and 4.40mm dimensions
- Mounting Type: Surface Mount
- RoHS3 Compliance: Required
Performance Parameters (Allowable Variation):
- Clock Frequency: 400 kHz or higher (1 MHz acceptable as performance enhancement)
- Access Time: 900 ns or faster (550 ns acceptable as performance enhancement)
- Write Cycle Time: 5ms or faster (4ms acceptable as performance enhancement)
- Voltage Supply Range: Must encompass or exceed 2.2V ~ 5.5V minimum requirement
- Operating Temperature: Extended ranges acceptable (e.g., -40°C ~ 85°C or -40°C ~ 125°C)
Substitute parts are grouped by clock frequency capability: standard 400 kHz devices and enhanced 1 MHz devices. All identified substitutes maintain identical memory capacity, I2C interface, and 8-TSSOP packaging.
Parameter Comparison
| Part Number | Manufacturer | Memory Size | Clock Frequency | Access Time | Voltage Supply | Operating Temp | Package | Inventory |
|---|---|---|---|---|---|---|---|---|
| 24LCS52/ST | Microchip Technology | 2Kbit | 400 kHz | 900 ns | 2.2V ~ 5.5V | 0°C ~ 70°C | 8-TSSOP | 2200 Pcs |
| 24AA02-I/ST | Microchip Technology | 2Kbit | 400 kHz | 900 ns | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | 3200 Pcs |
| 24AA024-I/ST | Microchip Technology | 2Kbit | 400 kHz | 900 ns | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | 1342 Pcs |
| AT24CS02-XHM-T | Microchip Technology | 2Kbit | 1 MHz | 550 ns | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | 15684 Pcs |
| AT24HC02C-XHM-B | Microchip Technology | 2Kbit | 1 MHz | 550 ns | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | 2062 Pcs |
| BR24G02FVT-3AGE2 | Rohm Semiconductor | 2Kbit | 1 MHz | Not specified | 1.6V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP-B | 2665 Pcs |
| BR24G02FVT-3GE2 | Rohm Semiconductor | 2Kbit | 400 kHz | Not specified | 1.6V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP-B | 3225 Pcs |
| BR24L02FVT-WE2 | Rohm Semiconductor | 2Kbit | 400 kHz | Not specified | 1.8V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP-B | 8215 Pcs |
| BR34E02FVT-3E2 | Rohm Semiconductor | 2Kbit | 400 kHz | Not specified | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP-B | 976 Pcs |
| CAT34C02YI-GT5A | onsemi | 2Kbit | 400 kHz | 900 ns | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | 21561 Pcs |
| M24C02-DRDW3TP/K | STMicroelectronics | 2Kbit | 1 MHz | 450 ns | 1.8V ~ 5.5V | -40°C ~ 125°C | 8-TSSOP | 2628 Pcs |
Engineering Selection Recommendations
All identified substitute parts maintain Active product status and RoHS3 compliance equivalent to the 24LCS52/ST. Selection criteria are based on the following factors:
Standard 400 kHz I2C Operation: 24AA02-I/ST, 24AA024-I/ST, BR24G02FVT-3GE2, BR24L02FVT-WE2, BR34E02FVT-3E2, and CAT34C02YI-GT5A are direct functional equivalents operating at 400 kHz clock frequency. These parts maintain identical memory capacity and I2C interface specifications. The 24AA02-I/ST and 24AA024-I/ST from Microchip Technology offer extended operating temperature range (-40°C ~ 85°C) compared to the original part. CAT34C02YI-GT5A from onsemi provides the highest inventory availability (21,561 Pcs) among 400 kHz options.
Enhanced 1 MHz I2C Operation: AT24CS02-XHM-T, AT24HC02C-XHM-B, BR24G02FVT-3AGE2, and M24C02-DRDW3TP/K operate at 1 MHz clock frequency with improved access times (550 ns or 450 ns). These parts are suitable for applications requiring faster I2C communication. The M24C02-DRDW3TP/K includes automotive qualification (AEC-Q100) and extended operating temperature to 125°C, appropriate for automotive-grade applications.
Voltage Supply Considerations: The original 24LCS52/ST specifies 2.2V ~ 5.5V supply range. All substitute parts support this range or extend it to lower voltages (1.6V ~ 1.8V minimum), providing enhanced flexibility for low-power applications.
Package Variant Note: Rohm Semiconductor parts (BR24G02FVT-3AGE2, BR24G02FVT-3GE2, BR24L02FVT-WE2, BR34E02FVT-3E2) use 8-TSSOP-B package variant. While mechanically compatible with standard 8-TSSOP footprints, verification of PCB layout compatibility is necessary for critical applications.
Frequently Asked Questions (FAQ)
Q: Can I substitute a 1 MHz part for the original 400 kHz 24LCS52/ST?
A: Yes. Parts operating at 1 MHz (AT24CS02-XHM-T, AT24HC02C-XHM-B, BR24G02FVT-3AGE2, M24C02-DRDW3TP/K) are functionally compatible. The higher clock frequency provides performance enhancement without reducing compatibility. The I2C protocol supports backward operation at lower frequencies, so 1 MHz-capable parts operate correctly in 400 kHz systems.
Q: What is the difference between 8-TSSOP and 8-TSSOP-B packages?
A: Both packages maintain identical 0.173" width and 4.40mm dimensions specified for the 24LCS52/ST. The 8-TSSOP-B designation indicates a variant from Rohm Semiconductor with equivalent mechanical and electrical compatibility. PCB footprints designed for standard 8-TSSOP accommodate 8-TSSOP-B devices without modification.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All identified substitute parts carry RoHS3 Compliant status, matching the environmental compliance of the original 24LCS52/ST.
Q: Which substitute offers the best inventory availability?
A: CAT34C02YI-GT5A from onsemi provides the highest inventory level at 21,561 Pcs, followed by AT24CS02-XHM-T at 15,684 Pcs.
Q: Can I use a part with extended operating temperature range in place of the 24LCS52/ST?
A: Yes. The 24LCS52/ST operates 0°C ~ 70°C. Substitute parts with extended ranges (-40°C ~ 85°C or -40°C ~ 125°C) are fully compatible and provide enhanced thermal margin for demanding environments.
Q: Is the M24C02-DRDW3TP/K suitable for automotive applications?
A: Yes. The M24C02-DRDW3TP/K carries AEC-Q100 automotive qualification and operates to 125°C, making it appropriate for automotive-grade designs requiring enhanced reliability and temperature performance.
Q: What voltage supply range must a substitute part support?
A: Substitute parts must support the original 2.2V ~ 5.5V range or extend it. All identified substitutes meet or exceed this requirement, with minimum supply voltages ranging from 1.6V to 1.8V.
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