Part A
24LC512-I/SM
微芯片科技
- Lifecycle
- Active
- Stock
- 2200 件
- Package
- SOIJ-8
- Series
- 記憶力
Replacement verdict
Compatible functional replacement candidate
The 24LC512-I/SM and 24LC512T-E/MS are functionally equivalent 512 Kbit I²C serial EEPROM devices from the same manufacturer, sharing identical memory density, interface protocol, and supply voltage range. The primary distinctions are the operating temperature grade and packaging orientation, making the 24LC512T-E/MS a viable functional substitute for the 24LC512-I/SM in extended-temperature applications, provided the tape-and-reel packaging format is acceptable for the assembly process.
Memory Density
High match
Interface Type
High match
Operating Temperature
Validation required
Package Type
Validation required
Parts at a glance
Part B
24LC512T-E/MS
微芯片科技
- Lifecycle
- Active
- Stock
- 4835 件
- Package
- TSSOP-8
- Series
- 記憶力
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 24LC512-I/SM | 24LC512T-E/MS | 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 and Reel | Affects compatibility with automated pick-and-place assembly lines versus manual or small-batch prototyping. |
| Memory Size | 512 Kbit | 512 Kbit | Defines the total storage capacity available for data logging or configuration storage. |
| Memory Organization | 64K x 8 | 64K x 8 | Determines the byte-addressable layout and how the host controller accesses stored data. |
| Interface Type | I²C (2-wire) | I²C (2-wire) | 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 | Ensures compatibility with the system power rail and logic levels. |
| Maximum Clock Frequency | 400 kHz | 400 kHz | Sets the upper bound on data transfer rate over the I²C bus. |
| Package / Case | 8-SOIC (SOIJ) | 8-MSOP | Footprint and lead pitch must match the PCB layout for the part to be soldered in place. |
| Mounting Type | Surface Mount | Surface Mount | Confirms the assembly process required and compatibility with SMT production lines. |
| Write Cycle Endurance | 1,000,000 cycles | 1,000,000 cycles | Indicates how many erase/write operations the memory can sustain before wear-out. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 24LC512-I/SM | 24LC512T-E/MS |
|---|---|---|
| Supplier | - | Microchip Technology |
| Part Status | Active | Active |
| Memory Type | Non-Volatile | Non-Volatile |
| Memory Format | EEPROM | EEPROM |
| Technology | EEPROM | EEPROM |
| Memory Size | 512Kb (64K x 8) | 512Kb (64K 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 24LC512-I/SM and the 24LC512T-E/MS?
The 24LC512-I/SM is a 512 Kbit I2C serial EEPROM in an 8-lead SOIC package with an industrial temperature range of -40°C to +85°C, supplied in tube packaging. The 24LC512T-E/MS is the same 512 Kbit I2C serial EEPROM die in an 8-lead MSOP package with an extended temperature range of -40°C to +125°C, supplied in tape and reel. The primary differences are package type, temperature grade, and shipping format.
Are the 24LC512-I/SM and 24LC512T-E/MS functionally interchangeable?
Both devices share the same 512 Kbit density, I2C interface, 64-byte page write buffer, and 1.7V to 5.5V operating voltage range. However, they are not drop-in replacements because the 24LC512-I/SM uses an SOIC-8 package and the 24LC512T-E/MS uses an MSOP-8 package, which have different footprints and PCB land patterns. The extended temperature grade of the 24LC512T-E/MS also exceeds the industrial grade of the 24LC512-I/SM.
What is the operating temperature range of each device?
The 24LC512-I/SM is rated for the industrial temperature range of -40°C to +85°C. The 24LC512T-E/MS is rated for the extended temperature range of -40°C to +125°C. The "I" suffix denotes industrial grade, and the "E" suffix denotes extended grade in Microchip's ordering code.
What package types are used for the 24LC512-I/SM and 24LC512T-E/MS?
The 24LC512-I/SM is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package, denoted by the "SM" suffix. The 24LC512T-E/MS is supplied in an 8-lead MSOP (Mini Small Outline Package), denoted by the "MS" suffix. The "T" in the 24LC512T-E/MS part number indicates tape and reel packaging.
What is the memory organization and interface of these devices?
Both the 24LC512-I/SM and 24LC512T-E/MS are 512 Kbit serial EEPROMs organized as 65,536 words of 8 bits each. They use a two-wire I2C compatible serial interface supporting clock frequencies up to 400 kHz at 1.7V and up to 1 MHz at 2.5V and above. Both feature a 64-byte page write buffer and support byte write and page write operations.
What are the operating voltage and current specifications for these devices?
Both the 24LC512-I/SM and 24LC512T-E/MS operate from 1.7V to 5.5V. Maximum read current is 400 µA at 5.5V, and maximum write current is 3 mA at 5.5V. Standby current is typically 1 µA at 5.5V. These parameters are common to both temperature grades and package options.
What is the difference between the "I" and "E" temperature suffixes in the part numbers?
In Microchip's 24LC512 ordering code, the "I" suffix indicates industrial temperature grade (-40°C to +85°C), while the "E" suffix indicates extended temperature grade (-40°C to +125°C). The 24LC512-I/SM is therefore limited to +85°C maximum ambient temperature, whereas the 24LC512T-E/MS can operate up to +125°C. Designs requiring operation above +85°C must use the extended grade version.
Can the 24LC512T-E/MS be used as a substitute for the 24LC512-I/SM in an existing design?
Substitution is not direct because the 24LC512-I/SM is in an SOIC-8 package and the 24LC512T-E/MS is in an MSOP-8 package. The PCB footprint and land pattern differ, so a board redesign or adapter is required. Electrically, the extended temperature grade of the 24LC512T-E/MS covers the industrial range of the 24LC512-I/SM, so it is functionally compatible if the package change is accommodated.
What are the packaging and shipping options for each part number?
The 24LC512-I/SM is supplied in tube packaging. The 24LC512T-E/MS is supplied in tape and reel, as indicated by the "T" prefix in the part number. Tape and reel is typically used for automated pick-and-place assembly, while tubes are often used for manual or low-volume production. Both are 8-lead surface-mount packages.