Part A
24LC512-E/SN
Mikrochip-Technologie
- Lifecycle
- Active
- Stock
- 5534 Stückzahl
- Series
- Arbeitsspeicher
Replacement verdict
Compatible functional replacement candidate
The 24LC512T-I/SM and 24LC512-E/SN are functionally compatible 512 Kbit I²C serial EEPROM devices sharing identical memory density, interface protocol, and supply voltage range. The primary distinction lies in their operating temperature grades and package footprints, making the 24LC512-E/SN a viable replacement candidate for the 24LC512T-I/SM in applications where the extended temperature range and SOIC-8 package are acceptable.
Operating Temperature Range
Validation required
Memory Density
High match
Interface Protocol
High match
Package Type
Validation required
Parts at a glance
Part B
24LC512T-I/SM
Mikrochip-Technologie
- Lifecycle
- Active
- Stock
- 1409 Stückzahl
- Package
- SOIC-8
- Series
- Speicher
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 24LC512T-I/SM | 24LC512-E/SN | Why it matters |
|---|---|---|---|
| Manufacturer Part Number | 24LC512T-I/SM | 24LC512-E/SN | Identifies the exact orderable part; the suffix encodes temperature range, package, and packing, which affect fit and application suitability. |
| 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; extended range parts are required for automotive and high-temperature applications. |
| Package / Case | 8-SOIC (SOIJ), 5.28mm width | 8-SOIC (SOIC), 3.90mm width | Footprint and land pattern must match the PCB; different body widths are not drop-in compatible without layout changes. |
| Mounting Type | Surface Mount | Surface Mount | Both are surface mount, but the differing package widths still require verification against the board footprint. |
| Packaging / Reel Option | Tape & Reel | Tube | Affects assembly line feed method and minimum order quantities; tube vs. reel is not interchangeable on automated pick-and-place equipment. |
| Memory Size | 512 Kbit | 512 Kbit | Storage capacity must match the firmware or data logging requirement; identical here, so no functional difference. |
| Memory Organization | 64K x 8 | 64K x 8 | Defines byte addressing and page structure; identical organization ensures software compatibility. |
| Interface Type | I²C (2-wire) | I²C (2-wire) | Protocol must match the host controller; both use I²C, so bus timing and addressing remain compatible. |
| Supply Voltage Range | 2.5V to 5.5V | 2.5V to 5.5V | Must align with the system rail; identical range allows use in the same 3.3V or 5V designs. |
| Maximum Clock Frequency | 400 kHz | 400 kHz | Sets the maximum I²C bus speed; identical value means no timing or throughput change. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 24LC512-E/SN | 24LC512T-I/SM |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | 24LC512 | - |
| Digi Key Programmable | Verified | - |
| Memory Type | Non-Volatile | Non-Volatile |
| Memory Format | EEPROM | EEPROM |
| Technology | EEPROM | EEPROM |
| Memory Size | 512Kbit | 512Kb (64K x 8) |
| Memory Organization | 64K x 8 | - |
| Memory Interface | I2C | I²C |
| Clock Frequency | 400 kHz | 400 kHz |
| Write Cycle Time - Word, Page | 5ms | - |
| 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 |
| Packaging | Tube | - |
| Access Time | 900 ns | 900 ns |
| Write Cycle Time - Word Page | - | 5ms |
Frequently asked questions
What are the key differences between the 24LC512T-I/SM and 24LC512-E/SN?
The primary differences are the operating temperature range and the package type. The 24LC512T-I/SM is specified for the industrial temperature range of -40°C to +85°C and comes in an 8-lead SOIJ (SM) package. The 24LC512-E/SN is specified for the extended temperature range of -40°C to +125°C and comes in an 8-lead SOIC (SN) package. Both are 512 Kbit I2C serial EEPROM devices from Microchip Technology.
Are the 24LC512T-I/SM and 24LC512-E/SN functionally interchangeable?
Functionally, both devices provide 512 Kbit of I2C serial EEPROM with the same memory organization, page size, and command set. However, they are not drop-in replacements for each other because they differ in package footprint and temperature grade. The 24LC512T-I/SM uses an SOIJ package, while the 24LC512-E/SN uses an SOIC package, and their PCB land patterns may differ.
What is the operating temperature range of each device?
The 24LC512T-I/SM is rated for the industrial temperature range of -40°C to +85°C. The 24LC512-E/SN is rated for the extended temperature range of -40°C to +125°C. The extended range device is suitable for applications requiring higher ambient temperature operation.
What package types are used for the 24LC512T-I/SM and 24LC512-E/SN?
The 24LC512T-I/SM is supplied in an 8-lead SOIJ (Small Outline J-Lead) package, denoted by the "SM" suffix. The 24LC512-E/SN is supplied in an 8-lead SOIC (Small Outline Integrated Circuit) package, denoted by the "SN" suffix. These packages have different physical dimensions and lead configurations, so PCB layout must be designed accordingly.
What is the memory density and interface of these devices?
Both the 24LC512T-I/SM and 24LC512-E/SN are 512 Kbit (64 Kbyte) serial EEPROM devices that use the I2C (Inter-Integrated Circuit) two-wire serial interface. They support standard I2C protocol with device addressing and are organized as 65,536 words of 8 bits each.
What supply voltage range do the 24LC512T-I/SM and 24LC512-E/SN support?
Both devices operate from a supply voltage range of 2.5V to 5.5V, as specified in the Microchip 24LC512 datasheet. This allows operation in both 3.3V and 5V systems.
Can the 24LC512-E/SN be used as a substitute for the 24LC512T-I/SM in an existing design?
Substitution requires careful evaluation. The 24LC512-E/SN offers a wider temperature range (-40°C to +125°C) but uses a different package (SOIC vs SOIJ). If the PCB footprint supports the SOIC package and the application does not require the specific SOIJ footprint, the extended temperature device may be used. However, the designer must verify package compatibility, thermal requirements, and any other system-level differences before substituting.
What is the significance of the "T" in the 24LC512T-I/SM part number?
The "T" in the 24LC512T-I/SM indicates that the device is supplied in tape and reel packaging, which is suitable for automated assembly processes. The 24LC512-E/SN part number does not include a "T" prefix in the same position, but packaging options should be confirmed with the manufacturer or distributor for the specific orderable part number.