Part A
25LC1024T-E/SM
マイクロチップ・テクノロジー
- Lifecycle
- Active
- Stock
- 6964 個数
- Package
- SOIC-8
- Series
- メモリ
Replacement verdict
Compatible functional replacement candidate
The 25LC1024T-E/SM is a functionally compatible replacement candidate for the 25LC1024-I/SM, sharing identical memory density, interface, and package footprint, with the primary distinction being the extended temperature range rating of the E-grade variant.
Memory Density
High match
Interface Type
High match
Package Type
High match
Operating Temperature
Validation required
Parts at a glance
Part B
25LC1024-I/SM
マイクロチップ・テクノロジー
- Lifecycle
- Active
- Stock
- 6667 個数
- Package
- SOIC-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 | 25LC1024-I/SM | 25LC1024T-E/SM | Why it matters |
|---|---|---|---|
| Memory Type | EEPROM | EEPROM | Both are serial EEPROM devices, so the fundamental storage technology is the same. |
| Memory Organization | 128K x 8 | 128K x 8 | Identical organization means the same address space and byte-wide access behavior. |
| Memory Interface | SPI | SPI | Both use the SPI bus, allowing drop-in compatibility in SPI-based designs. |
| Clock Frequency | 10 MHz | 10 MHz | Same maximum clock rate means equivalent read/write throughput capability. |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Identical operating voltage range supports the same system power rails. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +125°C | The extended temperature range of the E-grade part allows use in harsher environments. |
| Package / Case | 8-SOIC | 8-SOIC | Same package footprint ensures physical board-level interchangeability. |
| Mounting Type | Surface Mount | Surface Mount | Both are surface-mount, but the tape-and-reel option of the T-grade part affects assembly handling. |
| Packaging | Tube | Tape & Reel | Different packaging affects automated pick-and-place assembly and inventory handling. |
| Write Cycle Time | 5 ms | 5 ms | Same write cycle time means equivalent programming latency in the application. |
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 | 25LC1024T-E/SM | 25LC1024-I/SM |
|---|---|---|
| Part Status | Active | Active |
| Memory Type | Non-Volatile | Non-Volatile |
| Memory Format | EEPROM | EEPROM |
| Technology | EEPROM | EEPROM |
| Memory Size | 1Mb (128K x 8) | 1Mb (128K x 8) |
| Memory Interface | SPI | SPI |
| Clock Frequency | 20 MHz | 20 MHz |
| Write Cycle Time - Word Page | 6ms | 6ms |
| 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 are the key differences between the 25LC1024-I/SM and 25LC1024T-E/SM?
The primary differences are the temperature range and packaging option. The 25LC1024-I/SM is specified for the industrial temperature range of -40°C to +85°C and is supplied in a tube. The 25LC1024T-E/SM is specified for the extended temperature range of -40°C to +125°C and is supplied in tape and reel. Both devices are identical 1 Mbit SPI serial EEPROMs in an 8-lead SOIC package.
Are the 25LC1024-I/SM and 25LC1024T-E/SM functionally interchangeable?
Yes, both devices are functionally identical 1 Mbit SPI serial EEPROMs with the same memory organization, command set, and electrical characteristics, except for the operating temperature range. They can be interchanged if the application's temperature requirements are satisfied by the selected version.
What is the memory organization of the 25LC1024-I/SM and 25LC1024T-E/SM?
Both devices are 1 Mbit serial EEPROMs organized as 131,072 words × 8 bits (128 Kbytes). They support byte-level and page-level writes with a 256-byte page size.
What SPI modes do the 25LC1024-I/SM and 25LC1024T-E/SM support?
Both devices support SPI modes 0 (0,0) and 3 (1,1), as defined by the clock polarity (CPOL) and clock phase (CPHA) settings. This allows compatibility with most standard SPI hosts.
What is the maximum clock frequency for the 25LC1024-I/SM and 25LC1024T-E/SM?
Both devices support a maximum SPI clock frequency of 20 MHz for read operations and 10 MHz for write operations, as specified in the manufacturer datasheet.
What are the operating voltage ranges for the 25LC1024-I/SM and 25LC1024T-E/SM?
Both devices operate over a supply voltage range of 2.5 V to 5.5 V, making them suitable for 3.3 V and 5 V systems.
What package type do the 25LC1024-I/SM and 25LC1024T-E/SM use?
Both devices are offered in an 8-lead SOIC (Small Outline Integrated Circuit) package, designated by the "SM" suffix in the part number. The package is Pb-free and RoHS compliant.
What is the difference in temperature range between the 25LC1024-I/SM and 25LC1024T-E/SM?
The 25LC1024-I/SM is rated for the industrial temperature range of -40°C to +85°C. The 25LC1024T-E/SM is rated for the extended temperature range of -40°C to +125°C. The "I" suffix denotes industrial, and the "E" suffix denotes extended temperature range.
What does the "T" suffix indicate in the 25LC1024T-E/SM part number?
The "T" suffix indicates that the device is supplied in tape and reel packaging, which is suitable for automated pick-and-place assembly. The 25LC1024-I/SM without the "T" is supplied in tubes.