Part A
24LC64T-E/SN
Mikrochip-Technologie
- Lifecycle
- Active
- Stock
- 6347 Stückzahl
- Package
- SOIC-8
- Series
- Speicher
Replacement verdict
Compatible functional replacement candidate
The 24LC64T-E/SN is a functionally compatible replacement candidate for the 24LC64-I/SN, sharing identical memory density, interface protocol, and supply voltage range. The primary distinction is the operating temperature grade, with the E-grade variant supporting the extended automotive temperature range. Designers should validate thermal requirements against the target application before substituting.
Memory Density
High match
Interface Protocol
High match
Supply Voltage Range
High match
Operating Temperature Range
Validation required
Parts at a glance
Part B
24LC64-I/SN
Mikrochip-Technologie
- Lifecycle
- Active
- Stock
- 4753 Stückzahl
- Package
- SOIC-8
- Series
- Speicher
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 24LC64-I/SN | 24LC64T-E/SN | Why it matters |
|---|---|---|---|
| Operating Temperature Range | -40°C to +85°C (Industrial) | -40°C to +125°C (Extended) | Determines the environments in which the device can reliably operate; the extended range part supports harsher thermal conditions. |
| Packaging / Delivery Form | Tube | Tape and Reel | Affects assembly line handling and pick-and-place automation; tape and reel is required for high-volume automated production. |
| Memory Size | 64 Kbit | 64 Kbit | Defines the total storage capacity available for data logging or configuration storage. |
| Memory Organization | 8K x 8 | 8K x 8 | Specifies how bytes are addressed, which must match the host controller's addressing scheme. |
| Interface Type | I²C (2-wire) | I²C (2-wire) | Determines compatibility with the system bus and required firmware protocol. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Must match the system power rail to ensure proper read/write operation and logic-level compatibility. |
| Maximum Clock Frequency | 400 kHz | 400 kHz | Sets the upper limit for data transfer speed on the I²C bus. |
| Package / Case | 8-SOIC | 8-SOIC | Determines PCB footprint and soldering process compatibility. |
| Mounting Type | Surface Mount | Surface Mount | Must match the board assembly method; both are SMD devices. |
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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 | 24LC64-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 are the key differences between the 24LC64-I/SN and 24LC64T-E/SN?
The 24LC64-I/SN is a 64Kbit I2C serial EEPROM in an 8-lead SOIC package with an industrial temperature range of -40°C to +85°C. The 24LC64T-E/SN is the same 64Kbit I2C serial EEPROM in the same 8-lead SOIC package but with an extended temperature range of -40°C to +125°C. The "T" designation in 24LC64T-E/SN indicates tape and reel packaging, while 24LC64-I/SN is typically supplied in tubes.
Are the 24LC64-I/SN and 24LC64T-E/SN functionally interchangeable?
Yes, both devices are functionally identical 64Kbit I2C serial EEPROMs with the same memory organization, I2C interface, and pinout. The primary differences are the operating temperature range and packaging format. The 24LC64T-E/SN can be used in applications requiring the wider -40°C to +125°C range, while the 24LC64-I/SN is rated for -40°C to +85°C.
What is the memory organization of the 24LC64-I/SN and 24LC64T-E/SN?
Both devices have a 64Kbit memory array organized as 8,192 words of 8 bits each (8K x 8). They support byte write and page write operations with a 32-byte page size. The I2C interface supports up to 400 kHz clock frequency for standard and fast modes.
What are the operating voltage ranges for the 24LC64-I/SN and 24LC64T-E/SN?
Both the 24LC64-I/SN and 24LC64T-E/SN operate over a voltage range of 2.5V to 5.5V. This allows them to be used in both 3.3V and 5V systems. The extended temperature version, 24LC64T-E/SN, maintains this voltage range across its full -40°C to +125°C operating range.
What package type do the 24LC64-I/SN and 24LC64T-E/SN use?
Both devices are offered in an 8-lead SOIC (Small Outline Integrated Circuit) package with a 3.90 mm body width. The package designation "SN" indicates the SOIC package. The 24LC64T-E/SN is supplied in tape and reel format, while the 24LC64-I/SN is typically supplied in tubes.
What is the difference in temperature grade between the 24LC64-I/SN and 24LC64T-E/SN?
The 24LC64-I/SN has an industrial temperature grade with an operating range of -40°C to +85°C. The 24LC64T-E/SN has an extended temperature grade with an operating range of -40°C to +125°C. The extended grade makes the 24LC64T-E/SN suitable for automotive and other high-temperature applications.
What is the write endurance and data retention of the 24LC64-I/SN and 24LC64T-E/SN?
Both devices are rated for a minimum of 1,000,000 write cycles and a data retention of greater than 200 years. These specifications are maintained across the respective operating temperature ranges of each device.
Can the 24LC64-I/SN be used as a drop-in replacement for the 24LC64T-E/SN?
Yes, the 24LC64-I/SN is a drop-in replacement for the 24LC64T-E/SN in terms of pinout, package, and electrical characteristics, provided the application does not require operation above +85°C. If the application requires the extended temperature range up to +125°C, the 24LC64T-E/SN must be used instead.