Part A
25LC128T-E/SN
Tecnologia Microchip
- Lifecycle
- Active
- Stock
- 5635 PCS
- Package
- SOIC-8
- Series
- Memória
Replacement verdict
Compatible functional replacement candidate
The 25LC160D-E/SN16KVAO is a functional replacement candidate for the 25LC128T-E/SN in most SPI EEPROM applications, with matching interface, package, and voltage characteristics; however, validation is required for the extended automotive temperature range and the increased memory density.
Memory Density
High match
Interface Type
High match
Package Type
High match
Operating Temperature
Validation required
Parts at a glance
Part B
25LC160D-E/SN16KVAO
Tecnologia Microchip
- Lifecycle
- Active
- Stock
- 3397 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 | 25LC160D-E/SN16KVAO | Why it matters |
|---|---|---|---|
| Memory Density | 128 Kbit | 16 Kbit | Determines total storage capacity; the two devices are not drop-in replacements because they hold different amounts of data. |
| Memory Organization | 16K x 8 | 2K x 8 | Defines the addressable word count and affects the address width required by the host controller. |
| Page Size | 64 bytes | 16 bytes | Page size limits how many bytes can be written in a single page-write cycle, impacting firmware write routines and throughput. |
| Maximum Clock Frequency | 10 MHz | 3 MHz | Higher clock rates allow faster data transfer; a slower device may bottleneck system performance if the bus is run at higher speed. |
| Supply Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | Both support common 3.3 V and 5 V logic supplies, so voltage compatibility is not a differentiator. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Both are rated for extended automotive/industrial temperature ranges, so thermal environment is not a differentiator. |
| Interface Type | SPI | SPI | Both use the standard SPI bus, so the host communication protocol is compatible. |
| Package / Mounting | 8-SOIC, Surface Mount | 8-SOIC, Surface Mount | Identical package and mounting allow the same PCB footprint, but density and speed differences still prevent direct substitution. |
| Automotive Qualification | AEC-Q100 (Extended) | AEC-Q100 (Automotive) | Both are automotive-qualified, but the specific qualification grade and suffix may affect acceptance in certain automotive designs. |
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 | 25LC160D-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 25LC160D-E/SN16KVAO?
The primary differences are memory density, package, 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 25LC160D-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 qualified for automotive applications (AEC-Q100).
Are the 25LC128T-E/SN and 25LC160D-E/SN16KVAO pin-to-pin compatible?
Yes, both devices are offered in the same 8-lead SOIC package and use the standard SPI pinout (CS, SO, WP, VSS, SI, SCK, HOLD, VCC). However, pin-to-pin compatibility does not guarantee functional equivalence; the memory density and instruction set differences must be considered.
Can the 25LC128T-E/SN be used as a drop-in replacement for the 25LC160D-E/SN16KVAO?
No, they are not direct drop-in replacements. The 25LC128T-E/SN has a larger memory density (128 Kbit vs. 16 Kbit) and a different page size and instruction set. Additionally, the 25LC160D-E/SN16KVAO is automotive-qualified (AEC-Q100) and rated for a higher temperature range, which may be required in the target application.
What are the operating voltage ranges for these two EEPROM devices?
Both the 25LC128T-E/SN and the 25LC160D-E/SN16KVAO operate over a voltage range of 2.5V to 5.5V, as specified in their respective Microchip datasheets.
What is the maximum clock frequency supported by each device?
The 25LC128T-E/SN supports a maximum SPI clock frequency of 10 MHz. The 25LC160D-E/SN16KVAO supports a maximum SPI clock frequency of 10 MHz as well, according to the manufacturer datasheets.
What are the temperature grade differences between the 25LC128T-E/SN and the 25LC160D-E/SN16KVAO?
The 25LC128T-E/SN is rated for the industrial temperature range of -40°C to +85°C. The 25LC160D-E/SN16KVAO is rated for the extended temperature range of -40°C to +125°C and is qualified to AEC-Q100 for automotive use.
What is the page size and write cycle endurance for each device?
The 25LC128T-E/SN has a 64-byte page size and a minimum write endurance of 1,000,000 erase/write cycles. The 25LC160D-E/SN16KVAO has a 16-byte page size and a minimum write endurance of 1,000,000 erase/write cycles, per the respective datasheets.
Are both devices RoHS compliant and what is their moisture sensitivity level (MSL)?
Both the 25LC128T-E/SN and the 25LC160D-E/SN16KVAO are RoHS compliant. Both are rated at MSL 1 according to their package specifications in the manufacturer datasheets.