Part A
24LC024T-I/MS
Tecnologia Microchip
- Lifecycle
- Active
- Stock
- 3230 PCS
- Package
- MSOP-8
- Series
- Memória
Replacement verdict
Compatible functional replacement candidate
The 24LC044-E/MS is a viable functional replacement candidate for the 24LC024T-I/MS in many designs, sharing the same I²C serial EEPROM interface, 8-pin MSOP footprint, and 2.5V–5.5V supply range. However, the 24LC044 offers twice the memory density (4 Kbit vs 2 Kbit) and a wider automotive-grade temperature range, so firmware memory mapping and operating environment requirements must be validated before substitution.
Memory Density
Validation required
Interface Type
High match
Package Type
High match
Operating Temperature
Validation required
Parts at a glance
Part B
24LC044-E/MS
Tecnologia Microchip
- Lifecycle
- Active
- Stock
- 5288 PCS
- Package
- TSSOP-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 | 24LC024T-I/MS | 24LC044-E/MS | Why it matters |
|---|---|---|---|
| Memory Density | 2 Kbit | 4 Kbit | 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 data storage needs. |
| Memory Organization | 256 x 8 | 512 x 8 | Defines how bytes are addressed; different word counts affect address byte requirements and software addressing logic. |
| Operating Temperature Range | -40°C to +85°C (Industrial) | -40°C to +125°C (Extended) | The extended temperature version supports harsher environments such as automotive or industrial applications, while the industrial version is limited to +85°C. |
| Interface Type | I²C (2-wire) | I²C (2-wire) | Both use the same I²C serial bus protocol, allowing similar host controller connections and firmware drivers. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Identical voltage ranges mean both can operate from common 3.3 V and 5 V rails without level shifting. |
| Maximum Clock Frequency | 400 kHz | 400 kHz | Same maximum I²C clock speed means comparable read/write throughput and timing compatibility. |
| Package / Mounting | 8-MSOP (Tape & Reel) | 8-MSOP | Both use the same 8-MSOP footprint, but the tape-and-reel packaging of the first part suits automated assembly lines differently than tube or tray options. |
| Page Size (Write) | 16 bytes | 16 bytes | Page size affects how many bytes can be written in a single I²C transaction; identical page sizes simplify firmware write routines. |
| Product Status | Active | Active | Both are currently active and available, so neither is at risk of obsolescence for new designs. |
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 | 24LC044-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 24LC044-E/MS?
The 24LC024T-I/MS is a 2 Kbit I2C serial EEPROM organized as 256 x 8 bits, while the 24LC044-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 24LC044-E/MS is specified for the extended temperature range (-40°C to +125°C). Both are offered in the MSOP-8 package.
Are the 24LC024T-I/MS and 24LC044-E/MS pin-to-pin compatible?
Yes. Both devices use the standard 8-lead MSOP package with the same I2C pinout: A0, A1, A2, VSS, SDA, SCL, WP, and VCC. This allows a common PCB footprint, but the designer must account for the different memory density and temperature grade.
Can the 24LC044-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 24LC044-E/MS has twice the memory density and a different I2C device address scheme. The 24LC024 uses a 7-bit address with the block-select bit fixed, while the 24LC044 uses a different address map. Firmware and address decoding must be validated before substitution.
What is the operating voltage range for these two EEPROM devices?
Both the 24LC024T-I/MS and the 24LC044-E/MS operate from 2.5V to 5.5V, supporting standard I2C bus voltages and low-voltage system designs.
What is the maximum clock frequency supported by the 24LC024T-I/MS and 24LC044-E/MS?
Both devices support I2C clock frequencies up to 400 kHz in standard and fast modes, and up to 1 MHz in fast-mode plus for the 24LC044-E/MS. The 24LC024T-I/MS is specified for 400 kHz maximum. Always confirm the exact speed grade from the manufacturer datasheet for the specific orderable part number.
How do the temperature grades differ between the 24LC024T-I/MS and 24LC044-E/MS?
The 24LC024T-I/MS is rated for the industrial temperature range of -40°C to +85°C. The 24LC044-E/MS is rated for the extended temperature range of -40°C to +125°C. The extended grade makes the 24LC044-E/MS suitable for harsher environments such as automotive or industrial control applications.
What are the package and mounting options for these devices?
Both the 24LC024T-I/MS and 24LC044-E/MS are available in the 8-lead MSOP (Micro Small Outline Package) and are surface-mount devices. The "T" in 24LC024T-I/MS indicates tape and reel packaging, while the 24LC044-E/MS is also supplied in tape and reel for automated assembly.
Do these EEPROMs support page write and sequential read operations?
Yes. Both devices support byte write, page write, current address read, random read, and sequential read operations. The 24LC024T-I/MS has a 16-byte page write buffer, while the 24LC044-E/MS has a 16-byte page write buffer as well. Write cycle time is typically 5 ms maximum for both devices.
What is the write protect (WP) pin function on the 24LC024T-I/MS and 24LC044-E/MS?
Both devices include a WP pin that provides hardware write protection for the entire memory array when tied to VCC. When WP is tied to VSS, normal read and write operations are enabled. This feature prevents accidental writes during power-up or in noisy environments.