Part A
24LC64T-E/SN
마이크로칩 기술
- Lifecycle
- Active
- Stock
- 6347 PCS
- Package
- SOIC-8
- Series
- 기억력
Replacement verdict
Compatible functional replacement candidate
The 24LC64T-E/SN and 24LC64-E/SN16KVAO are functionally equivalent 64 Kbit I²C serial EEPROM devices sharing the same memory organization, interface protocol, and SOIC-8 footprint, making the 24LC64T-E/SN a viable replacement candidate for the 24LC64-E/SN16KVAO in most designs. Designers should confirm automotive qualification requirements and ordering tape-and-reel preferences before substituting.
Memory Density & Organization
High match
Interface Type
High match
Package Type
High match
Automotive Qualification
Validation required
Parts at a glance
Part B
24LC64-E/SN16KVAO
마이크로칩 기술
- Lifecycle
- Active
- Stock
- 4583 PCS
- Package
- SOIC-8
- Series
- 기억력
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-E/SN | 24LC64-E/SN16KVAO | Why it matters |
|---|---|---|---|
| Memory Type | EEPROM | EEPROM | Both are serial EEPROM devices, so the fundamental storage technology is the same. |
| Memory Size | 64 Kbit | 64 Kbit | Identical density ensures the same storage capacity for firmware, calibration, or configuration data. |
| Memory Organization | 8K x 8 | 8K x 8 | Matching byte-wide organization allows identical addressing and data handling in software. |
| Interface | I2C | I2C | The same serial interface means both parts can be used on the same bus without protocol changes. |
| Clock Frequency | 400 kHz | 400 kHz | Identical maximum clock rate ensures the same read/write timing performance. |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | The same operating voltage range allows direct substitution in 2.5 V, 3.3 V, and 5 V systems. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Equivalent temperature ratings support use in the same automotive and industrial environments. |
| Package / Case | 8-SOIC | 8-SOIC | The same package footprint allows drop-in board replacement without layout changes. |
| Mounting Type | Surface Mount | Surface Mount | Identical mounting style ensures compatibility with the same assembly process. |
| Automotive Qualification | AEC-Q100 | AEC-Q100 | Both are automotive-qualified, so they meet the same reliability and quality standards for vehicle applications. |
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 | 24LC64-E/SN16KVAO |
|---|---|---|
| Supplier | - | Microchip Technology |
| Series | - | Automotive, AEC-Q100 |
| 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 ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the 24LC64T-E/SN and the 24LC64-E/SN16KVAO?
The 24LC64T-E/SN is a 64-Kbit I2C serial EEPROM in an 8-lead SOIC package with a standard part number designation. The 24LC64-E/SN16KVAO is a 64-Kbit I2C serial EEPROM in the same 8-lead SOIC package but carries an automotive-grade qualification suffix (VAO) indicating AEC-Q100 compliance and is supplied in tape and reel packaging. Both share the same memory density, interface, and package footprint, but differ in qualification level and packaging orientation.
Are the 24LC64T-E/SN and 24LC64-E/SN16KVAO functionally interchangeable?
Functionally, both devices provide 64 Kbit of I2C serial EEPROM with the same pinout and command set. However, the 24LC64-E/SN16KVAO is automotive-qualified (AEC-Q100) while the 24LC64T-E/SN is an industrial-grade device. Direct substitution depends on the target application's qualification requirements; in automotive or high-reliability designs, the VAO version is required, whereas the standard version may be acceptable in commercial or industrial applications.
What is the operating temperature range for each device?
The 24LC64T-E/SN is specified for the industrial temperature range of -40°C to +85°C. The 24LC64-E/SN16KVAO is also specified for -40°C to +85°C but is additionally qualified to AEC-Q100 automotive standards, which may include extended stress testing and qualification beyond the standard industrial grade.
What package type do both devices use?
Both the 24LC64T-E/SN and 24LC64-E/SN16KVAO are offered in an 8-lead SOIC (150 mil) package. The "SN" suffix in both part numbers denotes this package type. The "T" in 24LC64T-E/SN indicates tape and reel packaging, while the 24LC64-E/SN16KVAO is also supplied in tape and reel as indicated by the "16KVAO" suffix.
What is the supply voltage range for these EEPROM devices?
Both the 24LC64T-E/SN and 24LC64-E/SN16KVAO operate from a supply voltage range of 2.5V to 5.5V, consistent with the Microchip 24LC64 series specifications. This wide range supports both 3.3V and 5V logic systems.
What is the maximum clock frequency supported by these devices?
Both devices support I2C clock frequencies up to 400 kHz in standard and fast modes. The 24LC64 series is specified for 400 kHz maximum clock frequency at 2.5V and above, which is standard for I2C fast-mode operation.
Does the 24LC64-E/SN16KVAO have any additional certifications compared to the 24LC64T-E/SN?
Yes. The 24LC64-E/SN16KVAO carries the "VAO" suffix, which indicates it is qualified to AEC-Q100 automotive standards. This includes additional testing for temperature cycling, high-temperature operating life, and other reliability metrics required for automotive applications. The 24LC64T-E/SN does not carry this automotive qualification.
What is the memory organization of these EEPROM devices?
Both devices are organized as 8,192 words × 8 bits (64 Kbit) with a 32-byte page write buffer. They support byte write and page write operations, as well as sequential and random read operations, consistent with the Microchip 24LC64 datasheet specifications.