25LC256-E/SN vs 25LC256-E/SN16KVAO

Cette comparaison détaillée des composants 25LC256-E/SN et 25LC256-E/SN16KVAO vous offre un aperçu précieux de leurs spécifications et caractéristiques clés. Nous abordons en détail les facteurs importants, notamment la conformité RoHS, le statut REACH, la série, le mode de montage, le type de boîtier et d'autres caractéristiques pertinentes. La présentation côte à côte des différences simplifie la sélection des composants et vous permet de choisir plus facilement la meilleure option pour votre application spécifique.

Technical review by ETEI Component Engineering Source: manufacturer documentation

Replacement verdict

Compatible functional replacement candidate

The 25LC256-E/SN16KVAO is a functionally compatible replacement candidate for the 25LC256-E/SN, as both devices share the same 256 Kbit SPI serial EEPROM architecture, 32 K x 8 organization, SOIC-8 package, and 2.5 V to 5.5 V operating range. Designers should validate the automotive-grade qualification status and temperature range of the VAO variant against their specific application requirements before committing to a drop-in substitution.

Memory Density and Organization High match
Package Type High match
Supply Voltage Range High match
Operating Temperature Range Validation required

Review the critical differences →

Parts at a glance

Key differences

Rows are prioritized by design impact. Highlighted values require attention during substitution.

Key electrical and mechanical differences between the two devices

Parameter 25LC256-E/SN 25LC256-E/SN16KVAO Why it matters
Memory Type EEPROM EEPROM Both devices must use the same non-volatile memory technology to be functionally interchangeable.
Memory Organization 32K x 8 32K x 8 Identical organization ensures the same address mapping and byte-level access behavior.
Memory Size 256 Kbit 256 Kbit Matching density guarantees the same storage capacity for firmware or data logging.
Interface SPI SPI The same serial interface allows drop-in compatibility with existing SPI buses.
Clock Frequency (Max) 10 MHz 10 MHz Equal maximum clock speed ensures comparable read/write throughput in the target system.
Supply Voltage Range 2.5 V to 5.5 V 2.5 V to 5.5 V Same operating voltage window allows use in identical power supply designs.
Operating Temperature Range -40°C to +125°C -40°C to +125°C Matching temperature grades ensure both parts meet the same environmental requirements.
Package / Case 8-SOIC 8-SOIC Identical package footprint enables direct PCB replacement without layout changes.
Mounting Type Surface Mount Surface Mount Same mounting style ensures compatibility with the same assembly process.
Automotive Qualification Not AEC-Q100 Qualified AEC-Q100 Qualified The VAO variant is automotive-qualified, which is critical for automotive applications requiring AEC-Q100 compliance.

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Full specification comparison

Use manufacturer datasheets as the final authority.

Specification 25LC256-E/SN 25LC256-E/SN16KVAO
Supplier - Microchip Technology
Series - Automotive, AEC-Q100
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 SPI SPI
Clock Frequency 10 MHz 5 MHz
Write Cycle Time - Word Page 5ms 5ms
Voltage - Supply 2.5V ~ 5.5V 2.5V ~ 5.5V
Operating Temperature -40°C ~ 125°C (TA) -40°C ~ 125°C (TA)
Mounting Type Surface Mount Surface Mount

Frequently asked questions

What are the 25LC256-E/SN and 25LC256-E/SN16KVAO?

Both are 256 Kbit SPI serial EEPROM devices from Microchip Technology. The 25LC256-E/SN is the standard ordering part number in an 8-lead SOIC package, while 25LC256-E/SN16KVAO is an automotive-qualified variant of the same device, also in an 8-lead SOIC package.

What is the difference between the 25LC256-E/SN and 25LC256-E/SN16KVAO?

The primary difference is qualification and screening. The 25LC256-E/SN16KVAO is an automotive-grade device that meets AEC-Q100 requirements and is produced under Microchip's automotive quality flow, while the 25LC256-E/SN is the standard industrial-grade version. Both share the same 256 Kbit density, SPI interface, and 8-lead SOIC package.

Are the 25LC256-E/SN and 25LC256-E/SN16KVAO pin-compatible?

Yes. Both devices use the same 8-lead SOIC package with identical pinout: CS, SO, WP, VSS, SI, SCK, HOLD, and VCC. This allows the same PCB footprint to accommodate either part.

What is the memory organization of these devices?

Both devices provide 256 Kbit of EEPROM organized as 32,768 bytes (32 K x 8). They support byte-level and page-level writes with a 64-byte page size, and are accessed via a standard SPI bus supporting modes 0 and 3.

What supply voltage range do these devices support?

Both the 25LC256-E/SN and 25LC256-E/SN16KVAO 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 system designs.

What is the maximum clock frequency of these EEPROMs?

Both devices support SPI clock frequencies up to 10 MHz at 4.5 V to 5.5 V, and up to 5 MHz at 2.5 V to 4.5 V, allowing fast read and write access in embedded systems.

What is the operating temperature range for each variant?

The 25LC256-E/SN is specified for the extended industrial temperature range of -40 °C to +125 °C. The 25LC256-E/SN16KVAO is also specified for -40 °C to +125 °C but is additionally qualified to automotive AEC-Q100 standards for use in automotive applications.

Can the 25LC256-E/SN16KVAO be used as a drop-in replacement for the 25LC256-E/SN?

Yes, in most cases. Because both devices share the same die, package, pinout, supply range, and SPI protocol, the automotive-qualified 25LC256-E/SN16KVAO can directly replace the standard 25LC256-E/SN. The reverse substitution may not be acceptable in automotive or high-reliability designs that require AEC-Q100 qualification.

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