Part A
25LC128T-E/SN
Tecnologia Microchip
- Lifecycle
- Active
- Stock
- 5635 PCS
- Package
- SOIC-8
- Series
- Memória
Replacement verdict
Compatible functional replacement candidate
The 25LC160DT-E/SN16KVAO is a functional replacement candidate for the 25LC128T-E/SN in SPI EEPROM applications, with matching interface, supply voltage, and package footprint, but the higher 16 Kbit density and automotive qualification of the 25LC160DT-E/SN16KVAO require firmware and application validation before direct substitution.
Memory Density
Validation required
Interface Type
High match
Supply Voltage
High match
Package Type
High match
Parts at a glance
Part B
25LC160DT-E/SN16KVAO
Tecnologia Microchip
- Lifecycle
- Active
- Stock
- 3137 PCS
- Package
- SOIC-8
- Series
- Memória
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 25LC128T-E/SN | 25LC160DT-E/SN16KVAO | Why it matters |
|---|---|---|---|
| Memory Density | 128 Kbit | 16 Kbit | Density determines total storage capacity; a 128 Kbit device stores eight times more data than a 16 Kbit device, so they are not drop-in substitutes for firmware or data-logging needs. |
| Organization | 16,384 x 8 | 2,048 x 8 | Byte organization affects address range and software addressing; different page/array sizes require firmware changes when swapping parts. |
| Page Size | 64 bytes | 16 bytes | Page size limits how many bytes can be written in a single write cycle; mismatched page sizes can slow writes or require different buffering logic. |
| Maximum Clock Frequency | 10 MHz | 3 MHz | Clock frequency sets the SPI data rate; a slower maximum clock reduces throughput and may violate timing assumptions in existing designs. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Operating voltage range must match the host system rails; identical ranges allow use in the same 3.3 V or 5 V designs. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Temperature grade determines suitability for automotive and industrial environments; matching ranges support the same application conditions. |
| Interface Type | SPI | SPI | Both use the SPI bus, so the same host controller pins and protocol framework can be reused, though command sets and timing may differ. |
| Package / Mounting | 8-SOIC, Surface Mount | 8-SOIC, Surface Mount | Package and mounting style must match the PCB footprint; identical 8-SOIC packages allow the same board layout. |
| Automotive Qualification | AEC-Q100 Grade 1 (E temp) | AEC-Q100 Grade 1 (VAO suffix) | Automotive qualification indicates reliability screening for harsh environments; both are automotive-grade, but the VAO variant carries specific OEM qualification documentation. |
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 | 25LC128T-E/SN | 25LC160DT-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 | 128Kb (16K x 8) | 16Kb (2K 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 key differences between the 25LC128T-E/SN and the 25LC160DT-E/SN16KVAO?
The primary differences are memory density, package type, temperature grade, and qualification status. The 25LC128T-E/SN is a 128 Kbit SPI serial EEPROM in an 8-lead SOIC package with an industrial temperature range of -40°C to +85°C. The 25LC160DT-E/SN16KVAO is a 16 Kbit SPI serial EEPROM in an 8-lead SOIC package with an extended temperature range of -40°C to +125°C and is automotive AEC-Q100 qualified.
Are the 25LC128T-E/SN and 25LC160DT-E/SN16KVAO pin-to-pin compatible?
Yes, both devices are offered in the same 8-lead SOIC package and use the standard SPI serial EEPROM pinout: CS, SO, WP, VSS, SI, SCK, HOLD, and VCC. This allows for a common PCB footprint, but firmware and density-dependent addressing must be updated accordingly.
Can the 25LC128T-E/SN be used as a drop-in replacement for the 25LC160DT-E/SN16KVAO?
No, a direct drop-in replacement is not possible without design validation. The 25LC128T-E/SN has a different memory density (128 Kbit vs. 16 Kbit), a different temperature grade (industrial vs. extended/automotive), and lacks the AEC-Q100 qualification of the 25LC160DT-E/SN16KVAO. Firmware addressing, command sequences, and application requirements must be reviewed before substitution.
What is the operating voltage range for both devices?
Both the 25LC128T-E/SN and the 25LC160DT-E/SN16KVAO operate over a supply voltage range of 2.5V to 5.5V, supporting both 3.3V and 5V system designs.
What SPI modes are supported by these EEPROM devices?
Both devices support SPI modes 0 (0,0) and 3 (1,1), which are the standard modes for Microchip 25LC series serial EEPROMs. Mode selection is determined by the clock polarity and phase settings of the host SPI controller.
What is the maximum clock frequency for the 25LC128T-E/SN and 25LC160DT-E/SN16KVAO?
Both devices support a maximum SPI clock frequency of 10 MHz at 4.5V to 5.5V and 5 MHz at 2.5V to 4.5V, allowing for high-speed read and write operations in embedded systems.
What are the endurance and data retention specifications for these EEPROMs?
Both the 25LC128T-E/SN and the 25LC160DT-E/SN16KVAO are rated for a minimum of 1,000,000 erase/write cycles and a data retention of greater than 200 years, making them suitable for high-reliability data logging and parameter storage applications.
Which device is better suited for automotive applications?
The 25LC160DT-E/SN16KVAO is better suited for automotive applications because it is AEC-Q100 qualified and rated for an extended temperature range of -40°C to +125°C. The 25LC128T-E/SN is rated only for the industrial temperature range of -40°C to +85°C and does not carry automotive qualification.