Part A
24LC256-I/SN
마이크로칩 기술
- Lifecycle
- Active
- Stock
- 5651 PCS
- Package
- SOIC-8
- Series
- 기억력
Replacement verdict
Compatible functional replacement candidate
The 24LC256T-E/SN is a functionally compatible replacement candidate for the 24LC256-I/SN, sharing identical memory density, interface, and supply voltage characteristics. The primary distinction lies in the temperature grade and packaging format, which may require validation depending on the target application environment.
Memory Density
High match
Interface Type
High match
Operating Temperature
Validation required
Package Type
Validation required
Parts at a glance
Part B
24LC256T-E/SN
마이크로칩 기술
- Lifecycle
- Active
- Stock
- 5813 PCS
- Package
- SOIC-8
- Series
- 기억력
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 24LC256-I/SN | 24LC256T-E/SN | 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 harsher thermal conditions. |
| Packaging / Delivery Form | Tube | Tape & Reel | Affects assembly line handling; tape and reel is required for automated pick-and-place production, while tubes suit manual or low-volume assembly. |
| Memory Size | 256 Kbit (32K x 8) | 256 Kbit (32K x 8) | Defines the total storage capacity available for data logging or configuration storage. |
| Memory Organization | 32K x 8 | 32K x 8 | Determines how bytes are addressed and accessed by the host controller. |
| Interface Type | I²C (2-wire serial) | I²C (2-wire serial) | Must match the host bus protocol for the device to communicate at all. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Defines the compatible system power rails and logic levels for the application. |
| Maximum Clock Frequency | 400 kHz | 400 kHz | Sets the maximum data transfer rate over the I²C bus. |
| Package / Case | 8-SOIC | 8-SOIC | Determines PCB footprint and mechanical compatibility for drop-in replacement. |
| Mounting Type | Surface Mount | Surface Mount | Must match the board assembly process and land pattern. |
| Write Cycle Endurance | 1,000,000 cycles | 1,000,000 cycles | Indicates how many times each memory cell can be rewritten before wear-out, affecting product lifetime. |
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 | 24LC256-I/SN | 24LC256T-E/SN |
|---|---|---|
| Part Status | Active | Active |
| Memory Type | Non-Volatile | Non-Volatile |
| Memory Format | EEPROM | EEPROM |
| Technology | EEPROM | EEPROM |
| Memory Size | 256Kb (32K x 8) | 256Kb (32K 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 ~ 85°C (TA) | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the 24LC256-I/SN and 24LC256T-E/SN?
The primary differences are the temperature range and packaging format. The 24LC256-I/SN is specified for the industrial temperature range of -40°C to +85°C and is supplied in standard tube packaging. The 24LC256T-E/SN is specified for the extended temperature range of -40°C to +125°C and is supplied in tape and reel packaging, as indicated by the "T" suffix. Both are 256 Kbit I²C serial EEPROMs in an 8-lead SOIC package.
Are the 24LC256-I/SN and 24LC256T-E/SN functionally interchangeable?
Yes, both devices are functionally identical 256 Kbit I²C serial EEPROMs with the same memory organization, I²C interface, page size, and operating voltage range of 2.5V to 5.5V. The differences are limited to the specified temperature grade and the shipping packaging. In applications where the operating temperature does not exceed +85°C, either device can be used, provided the packaging format is acceptable for the assembly process.
What is the operating temperature range of each device?
The 24LC256-I/SN is rated for the industrial temperature range of -40°C to +85°C. The 24LC256T-E/SN is rated for the extended temperature range of -40°C to +125°C. The "I" suffix denotes industrial grade, while the "E" suffix denotes extended grade.
What package type do both devices use?
Both the 24LC256-I/SN and 24LC256T-E/SN are offered in the 8-lead SOIC (150 mil) package, denoted by the "SN" suffix in the part number. The package dimensions and pinout are identical between the two variants.
What is the difference between the "T" suffix in 24LC256T-E/SN and the absence of "T" in 24LC256-I/SN?
The "T" suffix indicates tape and reel packaging. The 24LC256T-E/SN is supplied in tape and reel format, which is suitable for automated pick-and-place assembly. The 24LC256-I/SN without the "T" is supplied in standard tube packaging. The electrical and functional characteristics of the two devices are otherwise the same within their respective temperature ratings.
What is the memory density and organization of these devices?
Both devices have a memory density of 256 Kbit, organized as 32,768 words of 8 bits each (32K x 8). They support a page size of 64 bytes for page write operations and use a standard I²C serial interface.
What is the operating voltage range for the 24LC256-I/SN and 24LC256T-E/SN?
Both devices operate over a voltage range of 2.5V to 5.5V. This wide range supports both 3.3V and 5V logic systems.
Can the 24LC256-I/SN be used as a drop-in replacement for the 24LC256T-E/SN?
In terms of electrical function and package footprint, yes, provided the application's operating temperature does not exceed +85°C. However, the 24LC256-I/SN is rated only to +85°C, while the 24LC256T-E/SN is rated to +125°C. If the application requires operation above +85°C, the 24LC256-I/SN is not a valid replacement. Additionally, the packaging format differs (tube vs. tape and reel), which may affect assembly line compatibility.