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Equivalent & Substitute Parts for 34LC02T-I/ST
Part Overview
The 34LC02T-I/ST is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz with 400 ns access time. The device is packaged in 8-TSSOP surface mount configuration and operates across a supply voltage range of 2.2V to 5.5V with temperature range of -40°C to 85°C. This part maintains active product status with ROHS3 compliance and unlimited moisture sensitivity rating.
Substitute parts are identified when equivalent memory capacity, interface protocol, package type, and operating specifications align with the primary device, enabling direct functional replacement in circuit applications.
Substiute Parts
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 | 2.2V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
| Package Type | 8-TSSOP |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility is determined by the following criteria:
Primary Compatibility Parameters:
- Memory capacity: 2Kbit (256 x 8 organization)
- Interface protocol: I2C
- Package type: 8-TSSOP surface mount
- Write cycle time: 5ms
- RoHS compliance: ROHS3
Secondary Compatibility Parameters:
- Clock frequency: 1 MHz operation (primary device specification)
- Access time: 400 ns or faster
- Supply voltage range: Must encompass or exceed 2.2V minimum
- Operating temperature: -40°C to 85°C minimum range
Substitute parts are grouped into two categories based on clock frequency alignment:
Category 1 - 1 MHz I2C Operation: Parts operating at 1 MHz clock frequency with access times of 400-550 ns, directly compatible with 1 MHz I2C bus timing requirements.
Category 2 - 400 kHz I2C Operation: Parts operating at 400 kHz clock frequency, suitable for applications where reduced I2C bus speed is acceptable and backward compatible with 1 MHz capable systems.
Parameter Comparison
| Part Number | Manufacturer | Memory Size | Clock Frequency | Access Time | Supply Voltage | Temp Range | Package | Inventory |
|---|---|---|---|---|---|---|---|---|
| 34LC02T-I/ST | Microchip Technology | 2Kbit | 1 MHz | 400 ns | 2.2V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | 715 Pcs |
| 24AA024T-I/ST | Microchip Technology | 2Kbit | 400 kHz | 900 ns | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | 2100 Pcs |
| 24AA02T-I/ST | Microchip Technology | 2Kbit | 400 kHz | 900 ns | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | 3592 Pcs |
| 34AA02T-E/ST | Microchip Technology | 2Kbit | 400 kHz | 900 ns | 1.7V ~ 5.5V | -40°C ~ 125°C | 8-TSSOP | 2040 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-T | Microchip Technology | 2Kbit | 1 MHz | 550 ns | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | 5546 Pcs |
| AT34C02D-XHM-T | Microchip Technology | 2Kbit | 1 MHz | Not specified | 1.7V ~ 5.5V | -40°C ~ 85°C | 8-TSSOP | 7447 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 |
Engineering Selection Recommendations
1 MHz Clock Frequency Substitutes (Direct Speed Match)
AT24CS02-XHM-T, AT24HC02C-XHM-T, and AT34C02D-XHM-T from Microchip Technology maintain 1 MHz I2C operation matching the primary device specification. These parts support equivalent bus timing and are suitable for applications requiring 1 MHz I2C performance. All three maintain ROHS3 compliance and active product status.
BR24G02FVT-3AGE2 from Rohm Semiconductor operates at 1 MHz with 8-TSSOP-B package configuration. This part extends supply voltage range to 1.6V minimum and maintains ROHS3 compliance and active product status.
400 kHz Clock Frequency Substitutes (Reduced Speed Operation)
24AA024T-I/ST, 24AA02T-I/ST, 34AA02T-E/ST from Microchip Technology operate at 400 kHz I2C frequency. These parts are suitable for applications where reduced I2C bus speed is acceptable. The 34AA02T-E/ST extends operating temperature range to -40°C to 125°C. All maintain ROHS3 compliance and active product status.
BR24G02FVT-3GE2, BR24L02FVT-WE2, and BR34E02FVT-3E2 from Rohm Semiconductor operate at 400 kHz with 8-TSSOP-B package configuration. All three maintain ROHS3 compliance and active product status.
Supply Voltage Considerations
The primary device 34LC02T-I/ST specifies 2.2V minimum supply voltage. Substitute parts with lower minimum voltage ratings (1.6V to 1.8V) provide extended low-voltage operation capability. Parts with higher minimum voltage requirements (1.7V) remain compatible with the primary device specification.
Package Variant Compatibility
Microchip Technology substitutes maintain 8-TSSOP package identical to the primary device. Rohm Semiconductor substitutes use 8-TSSOP-B variant, which maintains identical 0.173" width and 4.40mm physical dimensions but may require verification for specific PCB footprint compatibility.
Frequently Asked Questions (FAQ)
Q: Can 400 kHz I2C parts replace a 1 MHz device?
A: Yes, 400 kHz parts are backward compatible with 1 MHz capable systems. The I2C protocol supports operation at reduced clock frequencies. However, applications requiring 1 MHz bus speed performance should use 1 MHz rated substitutes.
Q: What is the difference between 8-TSSOP and 8-TSSOP-B packages?
A: Both packages maintain identical physical dimensions (0.173" width, 4.40mm). The -B designation indicates a variant from Rohm Semiconductor. PCB footprints designed for standard 8-TSSOP are compatible with 8-TSSOP-B devices.
Q: Are all substitute parts ROHS3 compliant?
A: Yes, all listed substitute parts maintain ROHS3 compliance matching the primary device specification.
Q: Which substitute offers the widest supply voltage range?
A: BR24G02FVT-3AGE2 and BR24G02FVT-3GE2 from Rohm Semiconductor specify 1.6V minimum supply voltage, providing the lowest minimum voltage operation among all listed substitutes.
Q: Can I use a substitute with extended temperature range?
A: Yes, 34AA02T-E/ST operates across -40°C to 125°C, exceeding the primary device range of -40°C to 85°C. This part is suitable for applications requiring extended high-temperature operation.
Q: What is the inventory status for substitutes?
A: AT24CS02-XHM-T maintains the highest inventory at 15,684 pieces. BR24L02FVT-WE2 provides 8,215 pieces. All listed substitutes maintain active product status with available stock.
Q: Are there differences in access time between substitutes?
A: 1 MHz substitutes specify 550 ns access time compared to 400 ns for the primary device. 400 kHz substitutes specify 900 ns access time. Applications with strict timing requirements should verify compatibility with specific access time specifications.
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