Part A
24LC512-E/SM
Technologie de micropuce
- Lifecycle
- Active
- Stock
- 2336 PCS
- Package
- SOIJ-8
- Series
- Mémoire
Replacement verdict
Compatible functional replacement candidate
The 24LC512-E/SM and 24LC512-I/MS are functionally equivalent 512 Kbit I²C serial EEPROM devices from the same manufacturer and die family, sharing identical memory organization, interface, voltage range, and package footprint. The only material distinction is the temperature grade: the E/SM variant is rated for the extended industrial range while the I/MS variant is rated for the standard industrial range. For applications whose operating conditions fall within the standard industrial envelope, the two part numbers are interchangeable without design changes; designs exposed to the wider extended range must retain the E/SM grade.
Memory Density and Organization
High match
Interface and Protocol
High match
Package and Pinout
High match
Operating Temperature Range
Validation required
Parts at a glance
Part B
24LC512-I/MS
Technologie de micropuce
- Lifecycle
- Active
- Stock
- 3549 PCS
- Package
- TSSOP-8
- Series
- Mémoire
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/SM | 24LC512-I/MS | Why it matters |
|---|---|---|---|
| Operating Temperature Range | -40°C to +125°C | -40°C to +85°C | The extended temperature range of the E-grade version allows operation in harsher environments such as automotive or industrial applications, while the I-grade is limited to standard industrial ranges. |
| Memory Size | 512 Kbit | 512 Kbit | Both devices provide the same storage capacity, ensuring functional equivalence for data logging or parameter storage. |
| Memory Organization | 64K x 8 | 64K x 8 | Identical organization means the same addressing scheme and byte-level access, allowing direct substitution without firmware changes. |
| Interface Type | I²C (2-wire) | I²C (2-wire) | Both use the standard I²C bus, ensuring compatibility with the same host controllers and bus speeds. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Matching voltage ranges allow both parts to operate from the same power rails without level shifting. |
| Maximum Clock Frequency | 400 kHz (2.5V) / 1 MHz (5V) | 400 kHz (2.5V) / 1 MHz (5V) | Identical speed grades ensure the same data throughput and timing compatibility with the I²C master. |
| Package / Mounting | 8-SOIC (Surface Mount) | 8-MSOP (Surface Mount) | Different package footprints require PCB layout changes; the MSOP is smaller, which may be critical for space-constrained designs. |
| Write Cycle Time (Max) | 5 ms | 5 ms | Same write cycle time ensures identical write latency and endurance behavior in the application. |
| Endurance | 1,000,000 write cycles | 1,000,000 write cycles | Equivalent endurance guarantees the same lifetime for high-write applications such as data logging. |
| Data Retention | >200 years | >200 years | Identical retention ensures long-term reliability for stored configuration or calibration data. |
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/SM | 24LC512-I/MS |
|---|---|---|
| Supplier | - | Microchip Technology |
| Part Status | Active | Active |
| Memory Type | Non-Volatile | Non-Volatile |
| Memory Format | EEPROM | EEPROM |
| Technology | EEPROM | EEPROM |
| Memory Size | 512Kb (64K x 8) | 512Kb (64K 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 24LC512-E/SM and 24LC512-I/MS?
The primary differences are the operating temperature range and the package type. The 24LC512-E/SM is specified for the extended temperature range of -40°C to +125°C and comes in an 8-lead SOIC package. The 24LC512-I/MS is specified for the industrial temperature range of -40°C to +85°C and comes in an 8-lead MSOP package.
Are the 24LC512-E/SM and 24LC512-I/MS functionally interchangeable?
Yes, both devices are 512 Kbit I2C serial EEPROMs with identical memory organization, voltage range (2.5V to 5.5V), and I2C protocol support. They are functionally interchangeable provided the application's temperature requirements and PCB footprint are compatible with the chosen variant.
Can the 24LC512-I/MS be used as a drop-in replacement for the 24LC512-E/SM?
No, they are not drop-in replacements because they use different package types. The 24LC512-E/SM uses an 8-lead SOIC package, while the 24LC512-I/MS uses an 8-lead MSOP package. The PCB land patterns are different, so a board designed for one package will not accept the other without a layout change.
Which variant should be selected for an automotive or high-temperature application?
The 24LC512-E/SM should be selected for applications requiring operation up to +125°C, as it is rated for the extended temperature range of -40°C to +125°C. The 24LC512-I/MS is only rated for the industrial range of -40°C to +85°C and is not suitable for higher-temperature environments.
Do both devices support the same I2C clock frequency and voltage range?
Yes, both the 24LC512-E/SM and 24LC512-I/MS support I2C operation up to 400 kHz and operate over a supply voltage range of 2.5V to 5.5V. These parameters are identical across both temperature variants.
What is the memory organization of the 24LC512-E/SM and 24LC512-I/MS?
Both devices are 512 Kbit EEPROMs organized as 65,536 words of 8 bits each (64 Kbyte). They support page write operations with a 128-byte page size and provide a hardware write-protect pin for the upper quadrant of the memory array.
Are both variants RoHS compliant and available in tape and reel packaging?
Yes, both the 24LC512-E/SM and 24LC512-I/MS are offered in RoHS-compliant packages and are available in tape and reel packaging for automated assembly. Specific ordering codes should be confirmed with the manufacturer's datasheet or authorized distributor.