Part A
24LC024T-I/MS
マイクロチップ・テクノロジー
- Lifecycle
- Active
- Stock
- 3230 個数
- Package
- MSOP-8
- Series
- メモリ
Replacement verdict
Compatible functional replacement candidate
The 24LC024T-I/MS and 24LC044T-E/MS are both I²C serial EEPROM devices from Microchip Technology with comparable interface and supply requirements, making the 24LC044T-E/MS a viable functional replacement candidate for the 24LC024T-I/MS in many applications. However, designers must account for differences in memory density, operating temperature grade, and package footprint before committing to a drop-in substitution.
Memory Density
Validation required
Interface Type
High match
Operating Temperature Range
Validation required
Supply Voltage Range
High match
Parts at a glance
Part B
24LC044T-E/MS
マイクロチップ・テクノロジー
- Lifecycle
- Active
- Stock
- 6058 個数
- Package
- TSSOP-8
- Series
- メモリ
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 24LC024T-I/MS | 24LC044T-E/MS | Why it matters |
|---|---|---|---|
| Memory Density | 2 Kbit | 4 Kbit | Density determines total storage capacity; a 4 Kbit device stores twice the data of a 2 Kbit device, so they are not directly substitutable for firmware or calibration storage. |
| Memory Organization | 256 x 8 | 512 x 8 | Organization defines the byte/word addressing scheme; different page and address boundaries affect software addressing and write routines. |
| Operating Temperature Range | -40°C to +85°C (Industrial) | -40°C to +125°C (Extended) | The extended temperature grade of the 24LC044T-E/MS allows operation in harsher environments such as automotive or industrial applications where the industrial-grade part may not be qualified. |
| Page Size | 16 bytes | 16 bytes | Page size limits the number of bytes that can be written in a single write cycle; matching page sizes simplifies firmware write routines. |
| Maximum Clock Frequency | 400 kHz | 400 kHz | Clock frequency determines the maximum data transfer rate on the I2C bus; identical values mean comparable throughput. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Supply voltage range must match the host system rail; identical ranges allow use in the same 2.5 V to 5.5 V designs. |
| Interface Type | I2C (2-wire) | I2C (2-wire) | Interface protocol must match the host controller; both use I2C, so bus compatibility is maintained. |
| Package / Mounting | 8-MSOP, Surface Mount | 8-MSOP, Surface Mount | Package and mounting type must match the PCB footprint; identical MSOP packages allow drop-in board placement. |
| Write Cycle Time (Max) | 5 ms | 5 ms | Write cycle time affects how quickly data can be committed; matching values preserve timing behavior in firmware. |
| Endurance | 1,000,000 write cycles | 1,000,000 write cycles | Endurance indicates how many write/erase cycles the memory can withstand; identical endurance means comparable long-term reliability. |
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 | 24LC024T-I/MS | 24LC044T-E/MS |
|---|---|---|
| Supplier | - | Microchip Technology |
| Part Status | Active | Active |
| Memory Type | Non-Volatile | Non-Volatile |
| Memory Format | EEPROM | EEPROM |
| Technology | EEPROM | EEPROM |
| Memory Size | 2Kb (256 x 8) | 4Kb (256 x 8 x 2) |
| Memory Interface | I²C | I²C |
| Clock Frequency | 400 kHz | 1 MHz |
| Voltage - Supply | 2.5V ~ 5.5V | 2.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Write Cycle Time - Word Page | 5ms | - |
| Access Time | 900 ns | - |
Frequently asked questions
What are the key differences between the 24LC024T-I/MS and the 24LC044T-E/MS?
The 24LC024T-I/MS is a 2 Kbit I2C serial EEPROM organized as 256 x 8 bits, while the 24LC044T-E/MS is a 4 Kbit I2C serial EEPROM organized as 512 x 8 bits. The 24LC024T-I/MS is specified for the industrial temperature range (-40°C to +85°C), whereas the 24LC044T-E/MS is specified for the extended temperature range (-40°C to +125°C). Both devices are offered in the MSOP-8 package.
Are the 24LC024T-I/MS and 24LC044T-E/MS pin-to-pin compatible?
Yes. Both devices use the standard 8-lead MSOP package with the same I2C pinout: A0, A1, A2 for address selection, VSS, SDA, SCL, WP, and VCC. This allows the same PCB land pattern to accommodate either device.
Can the 24LC044T-E/MS be used as a direct drop-in replacement for the 24LC024T-I/MS?
Not as a direct drop-in replacement without design review. Although the package and pinout are identical, the memory density differs (4 Kbit vs 2 Kbit), which affects the device address byte and the number of addressable memory locations. Firmware that assumes a 2 Kbit address map may not correctly access the full 4 Kbit array of the 24LC044T-E/MS.
What is the operating voltage range for these two EEPROM devices?
Both the 24LC024T-I/MS and the 24LC044T-E/MS operate from a single supply voltage of 2.5 V to 5.5 V, making them suitable for mixed 3.3 V and 5 V logic systems.
What is the maximum clock frequency supported by the 24LC024T-I/MS and 24LC044T-E/MS?
Both devices support I2C clock frequencies up to 400 kHz (Fast mode) across their specified voltage and temperature ranges.
How does the temperature grade differ between the 24LC024T-I/MS and the 24LC044T-E/MS?
The 24LC024T-I/MS is rated for the industrial temperature range of -40°C to +85°C. The 24LC044T-E/MS is rated for the extended temperature range of -40°C to +125°C, making it more suitable for automotive or high-temperature industrial applications.
Do both devices support hardware write protection?
Yes. Both the 24LC024T-I/MS and the 24LC044T-E/MS provide a WP pin that enables hardware write protection of the entire memory array when tied to VCC, while allowing normal read and write operations when tied to VSS.
What is the page size for write operations on these EEPROMs?
Both the 24LC024T-I/MS and the 24LC044T-E/MS support page write operations with a 16-byte page buffer. Exceeding the page boundary during a write cycle causes the address to wrap around within the same page.