Part A
24LC512-E/SN
Tecnologia Microchip
- Lifecycle
- Active
- Stock
- 5534 PCS
- Series
- Memória - Memória
Replacement verdict
Compatible functional replacement candidate
The 24LC512T-E/SN16KVAO is a functionally compatible replacement candidate for the 24LC512-E/SN, sharing identical memory density, interface protocol, and supply voltage range. The primary distinction is the automotive-grade qualification of the 24LC512T-E/SN16KVAO, which exceeds the standard industrial-grade rating of the 24LC512-E/SN. Designers should verify that the tighter operating temperature range and automotive-specific qualification requirements align with their application needs 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
24LC512T-E/SN16KVAO
Tecnologia Microchip
- Lifecycle
- Active
- Stock
- 4410 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 | 24LC512-E/SN | 24LC512T-E/SN16KVAO | Why it matters |
|---|---|---|---|
| Memory Type | EEPROM | EEPROM | Both are serial EEPROM devices, so the fundamental memory technology is the same. |
| Memory Size | 512 Kbit (64K x 8) | 512 Kbit (64K x 8) | Identical density ensures the same storage capacity for firmware, calibration data, or configuration. |
| Interface | I2C (2-wire) | I2C (2-wire) | Matching interface means the same host controller pins and protocol can be used without redesign. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Same operating voltage window allows direct substitution in 3.3 V and 5 V systems. |
| Maximum Clock Frequency | 400 kHz (standard) / 1 MHz (high-speed) | 400 kHz (standard) / 1 MHz (high-speed) | Identical bus speed capability ensures timing compatibility with the existing I2C master. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Same extended temperature range qualifies both for automotive and industrial environments. |
| Package / Case | 8-SOIC (SOIC-8) | 8-SOIC (SOIC-8) | Identical footprint and pinout allow drop-in PCB replacement without layout changes. |
| Mounting Type | Surface Mount | Surface Mount | Same mounting style ensures compatibility with the existing assembly process. |
| Automotive Qualification | Not AEC-Q100 qualified | AEC-Q100 qualified | The automotive-qualified variant is required for under-hood or safety-critical applications, while the standard part is not. |
| Packaging / Ordering Option | Tube | Tape and Reel | Different packaging affects handling and automated pick-and-place assembly, though the die and package are the same. |
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 | 24LC512-E/SN | 24LC512T-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 | 512Kbit | 512Kb (64K x 8) |
| Memory Interface | I2C | I²C |
| Clock Frequency | 400 kHz | 400 kHz |
| Write Cycle Time - Word Page | - | 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 |
| Base Product Number | 24LC512 | - |
| Digi Key Programmable | Verified | - |
| Memory Organization | 64K x 8 | - |
| Write Cycle Time - Word, Page | 5ms | - |
| Packaging | Tube | - |
Frequently asked questions
What are the key differences between the 24LC512-E/SN and 24LC512T-E/SN16KVAO?
The 24LC512-E/SN is a standard 512 Kbit I2C serial EEPROM in an 8-lead SOIC package, while the 24LC512T-E/SN16KVAO is the same 512 Kbit I2C serial EEPROM in the same 8-lead SOIC package but supplied in tape and reel packaging and qualified to the automotive AEC-Q100 Grade 1 standard. The "T" designates tape and reel, and "VAO" indicates automotive qualification.
Are the 24LC512-E/SN and 24LC512T-E/SN16KVAO functionally interchangeable?
Yes. Both devices are 512 Kbit I2C serial EEPROMs with identical memory organization, I2C interface, operating voltage range of 2.5 V to 5.5 V, and 8-lead SOIC package pinout. The primary differences are packaging format and automotive qualification, not device functionality.
What is the memory organization of these EEPROM devices?
Both the 24LC512-E/SN and 24LC512T-E/SN16KVAO are organized as 65,536 words of 8 bits (64 Kbyte) with a 512 Kbit total capacity. They support page write operations with a 128-byte page size and random/sequential read operations via the I2C bus.
What is the operating temperature range for each device?
The 24LC512-E/SN is specified for the extended industrial temperature range of -40°C to +125°C. The 24LC512T-E/SN16KVAO is AEC-Q100 Grade 1 qualified and also operates from -40°C to +125°C, making both suitable for harsh environments, though the VAO variant carries formal automotive qualification.
What I2C clock frequency do these devices support?
Both devices support I2C clock frequencies up to 400 kHz in standard and fast modes, and up to 1 MHz in fast-mode plus, depending on the supply voltage. At 2.5 V and above, 400 kHz operation is guaranteed; 1 MHz operation requires VCC of at least 2.5 V per the manufacturer datasheet.
What are the packaging differences between the two part numbers?
The 24LC512-E/SN is supplied in standard tube packaging. The 24LC512T-E/SN16KVAO is supplied in tape and reel format, indicated by the "T" suffix, which is suitable for automated pick-and-place assembly lines. Both use the same 8-lead SOIC (150 mil) package body.
Does the 24LC512T-E/SN16KVAO meet automotive qualification requirements?
Yes. The "VAO" suffix indicates the device is qualified to AEC-Q100 Grade 1, which covers an ambient operating temperature range of -40°C to +125°C and includes additional automotive-specific reliability and quality testing. The standard 24LC512-E/SN is not automotive qualified.
What is the write endurance and data retention specification for these EEPROMs?
Both the 24LC512-E/SN and 24LC512T-E/SN16KVAO are specified for a minimum of 1,000,000 write cycles per byte and a data retention period of greater than 200 years, as stated in the Microchip 24LC512 datasheet.