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 24LC044-I/MS is a functional replacement candidate for the 24LC024T-I/MS in most I²C serial EEPROM applications, sharing the same MSOP-8 footprint, 2.5V–5.5V operating range, and 1 MHz fast-mode-plus interface, though designers must account for the larger 4 Kbit memory density and the different device address scheme before committing to a drop-in substitution.
Memory Density
Validation required
Package Type
High match
Supply Voltage Range
High match
Interface Type
High match
Parts at a glance
Part B
24LC044-I/MS
マイクロチップ・テクノロジー
- Lifecycle
- Active
- Stock
- 5072 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 | 24LC044-I/MS | Why it matters |
|---|---|---|---|
| Memory Density | 2 Kbit | 4 Kbit | Determines total storage capacity; the 24LC044 offers twice the memory, so it is not a drop-in replacement when the full 4 Kbit is required. |
| Memory Organization | 256 x 8 | 512 x 8 | Defines how bytes are addressed; different organization affects address byte usage and maximum addressable locations. |
| Number of Words | 256 | 512 | Directly tied to addressable memory space; firmware that assumes 256 words may not access the upper half of the 24LC044. |
| Page Size | 16 bytes | 16 bytes | Page write buffer size affects write throughput and boundary handling; identical page size simplifies write routine reuse. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Operating voltage compatibility ensures the device works in the target system without level shifting. |
| Maximum Clock Frequency | 400 kHz | 400 kHz | Determines I2C bus speed and read/write timing; matching frequency supports identical bus timing configuration. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Industrial temperature range ensures reliable operation in harsh environments; identical range supports same application conditions. |
| Package / Case | 8-TSSOP, 8-MSOP | 8-TSSOP, 8-MSOP | Physical footprint and pinout must match for PCB compatibility; identical package allows same land pattern. |
| Interface Type | I2C (2-wire) | I2C (2-wire) | Protocol compatibility ensures the same host controller can communicate with either device without changes. |
| Write Cycle Time | 5 ms max | 5 ms max | Affects write latency and polling requirements; identical timing allows reuse of existing write routines. |
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-I/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 ~ 85°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-I/MS?
The primary difference is memory density: the 24LC024T-I/MS is a 2 Kbit (256 x 8) I2C serial EEPROM, while the 24LC044-I/MS is a 4 Kbit (512 x 8) I2C serial EEPROM. Both are manufactured by Microchip Technology and are offered in the MSOP-8 package. The 24LC044 provides twice the storage capacity of the 24LC024.
Are the 24LC024T-I/MS and 24LC044-I/MS pin-compatible?
Yes. Both devices are supplied in the 8-lead MSOP (MS) package and use the standard I2C serial EEPROM pinout: A0, A1, A2 (address inputs), VSS, SDA, SCL, WP (write-protect), and VCC. Because the pin functions and package footprint are identical, they are pin-compatible when both are in the MSOP-8 package.
Can the 24LC044-I/MS be used as a drop-in replacement for the 24LC024T-I/MS?
In many designs, yes, provided the system firmware and I2C addressing are reviewed. Both devices share the same I2C interface, voltage range, and MSOP-8 pinout. However, the memory organization differs (2 Kbit vs 4 Kbit), so the address map, page size, and any firmware that assumes a specific density must be validated before substitution.
What is the operating voltage range for the 24LC024T-I/MS and 24LC044-I/MS?
Both devices operate over a supply voltage range of 2.5 V to 5.5 V, making them suitable for mixed 3.3 V and 5 V logic systems. This wide range is specified in the respective Microchip datasheets for the 24LC024 and 24LC044 families.
What I2C clock frequency do the 24LC024T-I/MS and 24LC044-I/MS support?
Both devices support standard-mode I2C at 100 kHz and fast-mode I2C at 400 kHz. The maximum clock frequency is 400 kHz for both the 24LC024 and 24LC044, as specified in their datasheets.
What is the page size and write cycle time for these two EEPROMs?
Both the 24LC024T-I/MS and 24LC044-I/MS use a 16-byte page buffer for page write operations. The typical write cycle time is 5 ms maximum, consistent with Microchip's 24LC02X and 24LC04X series specifications.
What is the difference in memory organization between the 24LC024T-I/MS and 24LC044-I/MS?
The 24LC024T-I/MS is organized as 256 bytes x 8 bits (2 Kbit), while the 24LC044-I/MS is organized as 512 bytes x 8 bits (4 Kbit). This affects the number of addressable memory locations and the word address size used in I2C transactions.
Do both devices support the same I2C device address range?
Both devices use a 7-bit I2C slave address with the upper four bits fixed as 1010 (0xA0 to 0xAE in 8-bit form). The lower three bits are set by the A0, A1, and A2 pins, allowing up to eight devices on the same bus. The address scheme is identical for both the 24LC024 and 24LC044.
Are the 24LC024T-I/MS and 24LC044-I/MS available in the same temperature grade?
Yes. Both the 24LC024T-I/MS and 24LC044-I/MS are specified with the "I" suffix, indicating an industrial temperature range of -40°C to +85°C. This is a standard Microchip industrial grade for these EEPROM families.