Part A
24LC512-E/SM
Mikrochip-Technologie
- Lifecycle
- Active
- Stock
- 2336 Stückzahl
- Package
- SOIJ-8
- Series
- Speicher
Replacement verdict
Compatible functional replacement candidate
The 24LC512-I/SM and 24LC512-E/SM are functionally equivalent 512Kbit I²C serial EEPROM devices in identical SOIC-8 packages, sharing the same memory organization, interface, and voltage range. The primary distinction is the operating temperature grade: the I/SM variant is rated for industrial temperature range while the E/SM variant is rated for extended temperature range. Both devices are drop-in compatible for applications within the industrial temperature envelope, with the E/SM offering broader thermal headroom for automotive and extended-range deployments.
Memory Density
High match
Interface Type
High match
Package Type
High match
Operating Temperature
Validation required
Parts at a glance
Part B
24LC512-I/SM
Mikrochip-Technologie
- Lifecycle
- Active
- Stock
- 2200 Stückzahl
- Package
- SOIJ-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 | 24LC512-I/SM | 24LC512-E/SM | 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 higher-temperature applications such as automotive or industrial control. |
| Memory Size | 512 Kbit (64K x 8) | 512 Kbit (64K x 8) | Defines the total storage capacity available for data or firmware; identical capacity means the two parts are functionally interchangeable in terms of memory footprint. |
| Memory Organization | 64K x 8 | 64K x 8 | Specifies how the memory array is addressed; matching organization ensures identical addressing and access behavior. |
| Interface Type | I²C (2-wire serial) | I²C (2-wire serial) | Determines the communication protocol used with the host controller; identical I²C interface allows drop-in replacement without firmware changes. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Defines the allowable power supply window; matching ranges ensure compatibility with the same system power rails. |
| Maximum Clock Frequency | 400 kHz (standard) / 1 MHz (high-speed) | 400 kHz (standard) / 1 MHz (high-speed) | Sets the maximum data transfer rate over the I²C bus; identical ratings mean equivalent throughput performance. |
| Package / Mounting Type | 8-SOIC (SOIJ), Surface Mount | 8-SOIC (SOIJ), Surface Mount | Determines physical footprint and PCB assembly compatibility; identical package allows the same board layout. |
| Write Cycle Time (Max) | 5 ms | 5 ms | Specifies the maximum time required to complete an internal write; matching values ensure identical timing behavior in the application. |
| Endurance (Write Cycles) | 1,000,000 cycles | 1,000,000 cycles | Indicates how many write/erase operations the memory can sustain; identical endurance means equivalent long-term reliability. |
| Data Retention | 200 years | 200 years | Specifies how long stored data remains valid without power; matching retention ensures equivalent non-volatile storage reliability. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 24LC512-E/SM | 24LC512-I/SM |
|---|---|---|
| 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 is the difference between the 24LC512-I/SM and the 24LC512-E/SM?
The primary difference is the operating temperature range. The 24LC512-I/SM is specified for the industrial temperature range of -40°C to +85°C, while the 24LC512-E/SM is specified for the extended temperature range of -40°C to +125°C. Both devices are 512 Kbit I2C serial EEPROMs in an 8-lead SOIC package.
Are the 24LC512-I/SM and 24LC512-E/SM functionally interchangeable?
Yes, both devices share the same 512 Kbit memory density, I2C interface, 8-lead SOIC (SM) package, pinout, and supply voltage range of 2.5V to 5.5V. The only specified difference is the temperature grade, so the 24LC512-E/SM can replace the 24LC512-I/SM in applications that require the wider temperature range, provided the higher-grade part is acceptable for the design.
What is the supply voltage range for the 24LC512-I/SM and 24LC512-E/SM?
Both the 24LC512-I/SM and 24LC512-E/SM operate from a supply voltage range of 2.5V to 5.5V, as specified in the Microchip 24LC512 datasheet.
What is the maximum clock frequency of the 24LC512-I/SM and 24LC512-E/SM?
Both devices support a maximum I2C clock frequency of 400 kHz (Fast mode) across their specified supply voltage and temperature ranges, per the Microchip 24LC512 datasheet.
What package do the 24LC512-I/SM and 24LC512-E/SM use?
Both the 24LC512-I/SM and 24LC512-E/SM are offered in the 8-lead SOIC package, denoted by the "SM" suffix in the ordering code. The package is Pb-free and RoHS compliant per Microchip's device documentation.
Can the 24LC512-E/SM be used in place of the 24LC512-I/SM in an industrial application?
Yes. The 24LC512-E/SM is rated for the wider -40°C to +125°C extended temperature range, which encompasses the -40°C to +85°C industrial range of the 24LC512-I/SM. Using the extended-temperature part in an industrial application is acceptable from a temperature-grade standpoint, though the designer should confirm all other electrical and timing parameters meet the system requirements.
Do the 24LC512-I/SM and 24LC512-E/SM have the same memory organization and I2C addressing?
Yes. Both devices are organized as 65,536 words x 8 bits (512 Kbit) and use the same I2C slave addressing scheme with configurable address pins (A0, A1, A2), allowing up to eight devices on the same bus. This is consistent across both temperature grades per the Microchip 24LC512 datasheet.
Which part number should be selected for an automotive or high-temperature design?
The 24LC512-E/SM should be selected for designs requiring operation up to +125°C, since the 24LC512-I/SM is only specified to +85°C. Designers should verify that the extended temperature grade meets the specific automotive or high-temperature qualification requirements of their application.