Part A
24LC64T-E/SN
Tecnologia Microchip
- Lifecycle
- Active
- Stock
- 6347 PCS
- Package
- SOIC-8
- Series
- Memória
Replacement verdict
Compatible functional replacement candidate
The 24LC64T-I/SN and 24LC64T-E/SN are functionally equivalent 64Kbit I²C serial EEPROM devices from Microchip Technology, sharing identical memory density, organization, interface, voltage range, and package footprint. The primary distinction lies in their operating temperature grades, with the I-grade supporting industrial ranges and the E-grade supporting extended automotive-oriented ranges. Both devices are drop-in compatible for applications whose thermal requirements fall within the industrial temperature envelope, making the E-grade a viable higher-margin replacement candidate where extended temperature tolerance is beneficial.
Memory Density and Organization
High match
Interface and Protocol
High match
Package Type and Pinout
High match
Operating Temperature Range
Validation required
Parts at a glance
Part B
24LC64T-I/SN
Tecnologia Microchip
- Lifecycle
- Active
- Stock
- 2108 PCS
- Package
- SOIC-8
- Series
- Memória
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 24LC64T-I/SN | 24LC64T-E/SN | Why it matters |
|---|---|---|---|
| Operating Temperature Range | -40°C to +85°C | -40°C to +125°C | Determines the environments in which the device can reliably operate; the extended temperature version supports harsher conditions. |
| Memory Size | 64 Kbit | 64 Kbit | Defines the total storage capacity available for data and must match the application's memory requirement. |
| Memory Organization | 8K x 8 | 8K x 8 | Specifies how the memory is arranged for addressing; identical organization ensures software compatibility. |
| Interface Type | I2C (2-wire) | I2C (2-wire) | Determines the communication protocol and pin requirements for connecting to a host controller. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Must be compatible with the system power rail to ensure proper operation and level shifting needs. |
| Maximum Clock Frequency | 400 kHz | 400 kHz | Affects data throughput and timing constraints in the I2C bus design. |
| Package / Case | SOIC-8 | SOIC-8 | Determines the physical footprint and soldering compatibility on the PCB. |
| Mounting Type | Surface Mount | Surface Mount | Ensures the device can be assembled using the intended PCB mounting process. |
| Write Cycle Time | 5 ms (max) | 5 ms (max) | Impacts how quickly data can be stored and the overall system responsiveness during write operations. |
| Endurance | 1,000,000 Write Cycles | 1,000,000 Write Cycles | Indicates the expected lifespan of the memory under repeated write operations. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 24LC64T-E/SN | 24LC64T-I/SN |
|---|---|---|
| Part Status | Active | Active |
| Memory Type | Non-Volatile | Non-Volatile |
| Memory Format | EEPROM | EEPROM |
| Technology | EEPROM | EEPROM |
| Memory Size | 64Kb (8K x 8) | 64Kb (8K x 8) |
| Memory Interface | I²C | I²C |
| Clock Frequency | 400 kHz | 400 kHz |
| Write Cycle Time - Word Page | 5ms | 5ms |
| Access Time | 900 ns | 900 ns |
| Voltage - Supply | 2.5V ~ 5.5V | 2.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 125°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the 24LC64T-I/SN and the 24LC64T-E/SN?
The primary difference is the operating temperature range. The 24LC64T-I/SN is specified for the industrial temperature range of -40°C to +85°C, while the 24LC64T-E/SN is specified for the extended temperature range of -40°C to +125°C. Both devices are otherwise functionally identical 64-Kbit I²C serial EEPROMs in an 8-lead SOIC package.
Are the 24LC64T-I/SN and 24LC64T-E/SN functionally interchangeable?
Yes, both devices share the same 64-Kbit memory density, I²C interface, 2-wire protocol, page size, and 8-lead SOIC (SN) package. They are functionally interchangeable provided the application's operating temperature range does not exceed the limits of the selected variant.
What is the operating temperature range of the 24LC64T-I/SN?
The 24LC64T-I/SN is rated for the industrial temperature range of -40°C to +85°C, as indicated by the "I" suffix in the part number.
What is the operating temperature range of the 24LC64T-E/SN?
The 24LC64T-E/SN is rated for the extended temperature range of -40°C to +125°C, as indicated by the "E" suffix in the part number.
What memory density and organization do the 24LC64T-I/SN and 24LC64T-E/SN provide?
Both devices provide 64 Kbits of serial EEPROM memory, organized as 8,192 words of 8 bits each (8 Kbytes), with a 32-byte page write buffer.
What supply voltage range do the 24LC64T-I/SN and 24LC64T-E/SN support?
Both devices operate from a supply voltage range of 2.5V to 5.5V, supporting low-voltage and standard 5V logic systems.
What package do the 24LC64T-I/SN and 24LC64T-E/SN use?
Both devices are supplied in the 8-lead SOIC (SN) package, which is a surface-mount plastic package with a 3.90 mm body width and 1.27 mm lead pitch.
What is the maximum clock frequency of the 24LC64T-I/SN and 24LC64T-E/SN?
Both devices support a maximum I²C clock frequency of 400 kHz (Fast mode) across their respective operating voltage and temperature ranges.
Can the 24LC64T-I/SN be used as a drop-in replacement for the 24LC64T-E/SN?
Yes, the 24LC64T-I/SN can be used in place of the 24LC64T-E/SN only if the application's maximum operating temperature does not exceed +85°C. If the application requires operation up to +125°C, the 24LC64T-E/SN must be used instead.