SST25PF040B-80-4C-S2AE Equivalent & Substitute Parts

Part Overview

The SST25PF040B-80-4C-S2AE is a 4Mbit FLASH memory IC with SPI interface operating at 80 MHz, manufactured by Microchip Technology in 8-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and design continuity. Substitute parts must maintain compatibility across memory capacity, interface protocol, package form factor, and voltage supply specifications to ensure functional equivalence in embedded systems and firmware storage applications.

Substiute Parts

SST25PF040B-80-4C-S2AE

Microchip TechnologyIn Stock: 1091SST25PF040B-80-4C-S2AE Datasheet

Current PartRFQ

SST25VF040B-50-4C-S2AF

Microchip TechnologyIn Stock: 22261SST25VF040B-50-4C-S2AF Datasheet

UpgradeRFQ

IS25LQ040-JBLE-TR

ISSI, Integrated Silicon Solution IncIn Stock: 1111IS25LQ040-JBLE-TR Datasheet

MFR RecommendedRFQ

MX25L4006EM1I-12G

MacronixIn Stock: 97140MX25L4006EM1I-12G Datasheet

MFR RecommendedRFQ

MX25L4006EM2I-12G

MacronixIn Stock: 9818MX25L4006EM2I-12G Datasheet

MFR RecommendedRFQ

W25Q40CLSSIG

Winbond ElectronicsIn Stock: 982W25Q40CLSSIG Datasheet

MFR RecommendedRFQ

W25X40CLSSIG

Winbond ElectronicsIn Stock: 44499W25X40CLSSIG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SST25PF040B-80-4C-S2AE are selected based on the following critical parameters that determine functional equivalence:

Primary Compatibility Criteria:

• Memory Size: 4Mbit (512K x 8 organization)
• Memory Interface: SPI (standard serial peripheral interface)
• Package / Case: 8-SOIC with 0.209" width and 5.30mm physical dimensions
• Voltage Supply: 2.3V ~ 3.6V operating range
• RoHS3 Compliance and MSL 3 rating

Secondary Considerations:

• Clock Frequency: Minimum 80 MHz or higher
• Write Cycle Time: 10µs or faster
• Operating Temperature Range: Must support 0°C ~ 70°C minimum

Substitutes are grouped into two categories: direct replacements from the same manufacturer (Microchip SST25VF040B series) and cross-manufacturer equivalents (ISSI, Macronix, Winbond) that meet all primary compatibility criteria.

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Same Manufacturer): SST25VF040B-50-4C-S2AF is the primary substitute from Microchip Technology. Although clock frequency is reduced to 50 MHz, this part maintains identical package dimensions (8-SOIC 5.30mm), memory organization (512K x 8), and SPI interface. Product status is Active with full RoHS3 compliance and MSL 3 rating. Voltage supply range shifts to 2.7V ~ 3.6V, which is compatible with most 3.3V systems.

Tier 2 - Cross-Manufacturer Active Status: MX25L4006EM2I-12G (Macronix) and W25X40CLSSIG (Winbond Electronics) are both Active products with 8-SOIC packaging matching the original 5.30mm width. Both support 2.3V ~ 3.6V supply voltage and exceed the 80 MHz clock frequency requirement (86 MHz and 104 MHz respectively). Both are RoHS3 compliant with MSL 3 rating. These parts provide extended operating temperature ranges (-40°C ~ 85°C) beyond the original specification.

Tier 3 - Enhanced Interface Options: IS25LQ040-JBLE-TR (ISSI) and W25Q40CLSSIG (Winbond) offer SPI - Quad I/O interface capability, providing backward compatibility with standard SPI while enabling higher-speed quad operations. Both maintain 2.3V ~ 3.6V supply compatibility and 8-SOIC 5.30mm packaging. These parts support extended temperature ranges and are Active products.

Not Recommended for New Designs: MX25L4006EM1I-12G carries "Not For New Designs" status and features 8-SOIC packaging with 3.90mm width, which differs from the original 5.30mm specification. This part should be avoided for new production.

Frequently Asked Questions (FAQ)

Q: Can SST25VF040B-50-4C-S2AF replace SST25PF040B-80-4C-S2AE directly? A: Yes. Both parts share identical memory capacity (4Mbit), organization (512K x 8), SPI interface, 8-SOIC 5.30mm package, and operating temperature range (0°C ~ 70°C). The 50 MHz clock frequency is lower than the original 80 MHz, but this is acceptable for most embedded applications. Voltage supply compatibility is maintained within the 2.7V ~ 3.6V range.

Q: What is the difference between SPI and SPI - Quad I/O interfaces? A: SPI - Quad I/O parts (IS25LQ040-JBLE-TR, W25Q40CLSSIG) support both standard SPI operation and higher-speed quad I/O modes. These parts are backward compatible with standard SPI protocols, making them suitable replacements for SPI-only designs while offering optional performance enhancement.

Q: Why does MX25L4006EM1I-12G have a different package width (3.90mm vs 5.30mm)? A: MX25L4006EM1I-12G uses a narrower 8-SOIC package variant. This physical difference may affect PCB layout compatibility and is not recommended for direct substitution without board redesign.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL 3 (168 Hours) moisture sensitivity rating, matching the original part's environmental certifications.

Q: Which substitute offers the best performance upgrade? A: W25X40CLSSIG and W25Q40CLSSIG both operate at 104 MHz, exceeding the original 80 MHz specification by 30%. Both support extended operating temperature ranges (-40°C ~ 85°C) and maintain full 2.3V ~ 3.6V supply compatibility with 8-SOIC 5.30mm packaging.

Q: Can I use parts with extended temperature ranges (-40°C ~ 85°C) in applications requiring only 0°C ~ 70°C? A: Yes. Extended temperature range parts are fully compatible with narrower temperature specifications. The wider operating range provides additional design margin and reliability headroom.