SST25WF080-75-4I-SAF-T Equivalent & Substitute Parts

Part Overview

The SST25WF080-75-4I-SAF-T is an 8Mbit SPI FLASH memory IC manufactured by Microchip Technology, designed for non-volatile data storage applications requiring SPI interface communication. This part operates at 75 MHz clock frequency with a supply voltage range of 1.65V to 1.95V and is rated for -40°C to 85°C operating temperature. The device is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	SST25WF080-75-4I-SAF-T
Manufacturer	Microchip Technology
Memory Size	8Mbit
Memory Organization	1M x 8
Memory Interface	SPI
Clock Frequency	75 MHz
Voltage Supply	1.65V ~ 1.95V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Write Cycle Time	25µs
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the SST25WF080-75-4I-SAF-T is determined by the following critical parameters:

Memory Size: 8Mbit (mandatory match)
Memory Organization: 1M x 8 (mandatory match)
Memory Interface: SPI (mandatory match)
Voltage Supply: 1.65V ~ 1.95V (mandatory match)
Package / Case: 8-SOIC form factor (mandatory match)
Operating Temperature Range: -40°C minimum and 85°C maximum (mandatory match)
RoHS3 Compliance: Required for regulatory alignment

Clock frequency and write cycle time are secondary parameters. Substitute parts operating at lower clock frequencies (40 MHz) or with different write cycle times remain functionally compatible, as they maintain the same memory capacity, interface protocol, and electrical specifications. The 8-SOIC package constraint allows for minor package variant designations (8-VSOIC, 8-VSOP) provided the physical footprint and pin configuration remain compatible with the original 0.154" width specification.

Parameter Comparison

Parameter	SST25WF080-75-4I-SAF-T	SST25WF080BT-40I/SN	LE25S80FDTWG	LE25S81FDTWG	LE25S81MCTWG	W25Q80EWSNIG TR	W25Q80EWSVIG TR
Manufacturer	Microchip	Microchip	onsemi	onsemi	onsemi	Winbond	Winbond
Memory Size	8Mbit	8Mbit	8Mbit	8Mbit	8Mbit	8Mbit	8Mbit
Memory Organization	1M x 8	1M x 8	1M x 8	1M x 8	1M x 8	1M x 8	1M x 8
Memory Interface	SPI	SPI	SPI	SPI	SPI	SPI - Quad I/O, QPI	SPI - Quad I/O, QPI
Clock Frequency	75 MHz	40 MHz	40 MHz	40 MHz	40 MHz	104 MHz	104 MHz
Voltage Supply	1.65V ~ 1.95V	1.65V ~ 1.95V	1.65V ~ 1.95V	1.65V ~ 1.95V	1.65V ~ 1.95V	1.65V ~ 1.95V	1.65V ~ 1.95V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 90°C	-40°C ~ 90°C	-40°C ~ 90°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Write Cycle Time	25µs	1ms	—	500µs	500µs	800µs	800µs
Product Status	Obsolete	Active	Active	Active	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All identified substitute parts maintain electrical and functional compatibility with the SST25WF080-75-4I-SAF-T through matching memory capacity, SPI interface protocol, supply voltage range, and 8-SOIC package configuration.

SST25WF080BT-40I/SN (Microchip Technology, Active) provides the closest manufacturer continuity as a Microchip product within the SST25 series. This part is actively produced and maintains ROHS3 compliance with improved moisture sensitivity rating (MSL 1 vs. MSL 3).

LE25S80FDTWG and LE25S81FDTWG (onsemi, Active) are actively supported alternatives offering extended operating temperature range to 90°C. LE25S81FDTWG provides documented write cycle time specification (500µs) and active product status.

W25Q80EWSNIG TR (Winbond Electronics, Active) operates at 104 MHz clock frequency, exceeding the original 75 MHz specification, with SPI Quad I/O capability. This part is actively produced with ROHS3 compliance.

LE25S81MCTWG (onsemi, Obsolete) and W25Q80EWSVIG TR (Winbond, 8-VSOP package variant) are available but present secondary considerations due to obsolete status or package variant differences.

Frequently Asked Questions (FAQ)

Q: Can SST25WF080BT-40I/SN replace SST25WF080-75-4I-SAF-T directly?

A: Yes. Both parts share identical memory capacity (8Mbit), organization (1M x 8), SPI interface, supply voltage (1.65V ~ 1.95V), operating temperature range (-40°C ~ 85°C), and 8-SOIC package. The 40 MHz clock frequency of the substitute is lower than the original 75 MHz, but this does not prevent functional substitution in applications where the lower frequency is acceptable.

Q: What is the difference between LE25S80FDTWG and LE25S81FDTWG?

A: Both parts are onsemi 8Mbit SPI FLASH devices in 8-SOIC package with identical memory specifications and voltage supply. LE25S81FDTWG provides documented write cycle time (500µs), while LE25S80FDTWG does not specify this parameter in available data. Both support -40°C to 90°C operating temperature range.

Q: Are Winbond W25Q80 parts compatible with the original SST25WF080-75-4I-SAF-T?

A: Yes. W25Q80EWSNIG TR and W25Q80EWSVIG TR maintain the required 8Mbit capacity, 1M x 8 organization, SPI interface, 1.65V ~ 1.95V supply voltage, and 8-SOIC package footprint. The W25Q80 series operates at 104 MHz with Quad I/O capability, providing performance exceeding the original specification. W25Q80EWSVIG TR uses an 8-VSOP package variant compatible with 8-SOIC footprints.

Q: Why do substitute parts have different write cycle times?

A: Write cycle time is a secondary performance parameter that does not affect functional compatibility. The original SST25WF080-75-4I-SAF-T specifies 25µs write cycle time, while substitutes range from 500µs to 1ms. Applications tolerating longer write cycles can use these alternatives without functional impact.

Q: Should I select an active product status part over an obsolete part?

A: Active product status parts (SST25WF080BT-40I/SN, LE25S80FDTWG, LE25S81FDTWG, W25Q80EWSNIG TR, W25Q80EWSVIG TR) provide ongoing manufacturing support and supply chain availability. Obsolete parts (LE25S81MCTWG) may have limited inventory and no future production commitment.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message