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Microchip Technology SST25PF040B-80-4C-QAE-T
- Part No.:
- SST25PF040B-80-4C-QAE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25PF040B-80-4C-QAE-T.pdf
- Description:
- IC FLASH 4MBIT SPI 80MHZ 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,844
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Product details
Overview
SST25PF040B-80-4C-QAE-T from Microchip Technology is a 4 Mbit SPI serial flash memory IC operating at 2.3–3.6V, supporting 80 MHz read speed (2.7–3.6V), uniform 4 KByte sector/32 KByte/64 KByte block erase, and Auto Address Increment (AAI) programming. It delivers 100,000 program/erase cycles and >100 years data retention in industrial-grade 8-lead SOIC (150 mil) packaging, used for firmware storage in microcontroller boot loaders and embedded system configuration.
For engineers reviewing the SST25PF040B-80-4C-QAE-T datasheet, SST25PF040B-80-4C-QAE-T pinout, SST25PF040B-80-4C-QAE-T application, or SST25PF040B-80-4C-QAE-T equivalent, this page provides verified electrical parameters, SPI Mode 0/3 timing behavior, hardware/software end-of-write detection implementation, and direct replacement guidance against current Microchip serial flash alternatives.
Technical Context
The SST25PF040B-80-4C-QAE-T implements a four-wire SPI interface with CE#, SCK, SI, and SO lines, supporting both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1). Its SuperFlash technology uses split-gate cells and thick-oxide tunneling injectors to achieve lower programming current and faster erase times versus conventional NOR flash.
It integrates dedicated control logic for hardware-based RY/BY# status output on SO during AAI programming (enabled via EBSY command 70H), dual write-protection mechanisms (WP# pin + software BP bits), and flexible erase granularity-4 KByte sectors, 32 KByte overlay blocks, and 64 KByte overlay blocks-all requiring prior WREN activation and respecting block-protection lock-down (BPL) state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte) organized as uniform 4 KByte erasable sectors |
| Supply Voltage | 2.3–3.6V - single supply enables direct interfacing with 2.5V/3.3V MCUs without level shifters |
| Max Read Speed | 80 MHz (2.7–3.6V) - supports high-throughput firmware loading in real-time systems |
| Endurance | 100,000 program/erase cycles - sufficient for field-upgradable embedded applications |
| Data Retention | >100 years - validated reliability for long-lifecycle industrial deployments |
| Erase Time | 18 ms typical for sector/block - reduces firmware update latency vs. legacy SPI flash |
| Active Read Current | 10 mA typical - low power draw during boot code execution |
| Standby Current | 5 μA typical - enables ultra-low-power sleep modes in battery-operated devices |
Pinout & Package
Package: 8-lead SOIC (150 mil), RoHS-compliant, commercial temperature range (0°C to +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout full instruction cycle including address/data transfer |
| SCK | Serial Clock | Timing reference for SPI communication; rising edge latches input (SI), falling edge outputs data (SO) |
| SI | Serial Data Input | Receives opcodes, addresses, and data; MSB-first, synchronized to SCK rising edge |
| SO | Serial Data Output / RY/BY# | Outputs read data or hardware busy status (when configured via EBSY command during AAI) |
| WP# | Write Protect | Enables/disables BPL bit lock-down; low = BPL controls BP bit writability, high = BP bits freely writable |
| HOLD# | Hold | Suspends ongoing SPI sequence without deselecting device; requires CE# active low and SCK low alignment |
| VDD | Power Supply | 2.3–3.6V supply input; powers internal logic and SuperFlash array |
| VSS | Ground | Reference return path for all digital and analog circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) Programming | Reduces total programming time by eliminating repeated address transmission for sequential word writes |
| Hardware End-of-Write Detection | SO pin outputs real-time RY/BY# status during AAI mode (via EBSY/DBSY commands), removing polling overhead |
| Dual Write Protection | Combines hardware WP# pin control with software-configurable BP3–BP0 bits for granular, persistent memory lockdown |
| Flexible Erase Architecture | Uniform 4 KByte sectors + 32/64 KByte overlay blocks enable optimized firmware partitioning and partial updates |
| SuperFlash Technology | Split-gate cell design achieves lower program current and shorter erase time than standard NOR flash |
Applications
| Firmware Boot Storage | Configuration Parameter Storage |
|---|---|
|
Use Scenario: Storing bootloader and application firmware images for ARM Cortex-M or PIC32 microcontrollers during cold start. IC Role / Device Role / Timing Role: Non-volatile code storage accessed via SPI during MCU reset sequence; supports high-speed 80 MHz reads for fast boot. Use Value: Enables sub-100ms boot time with reliable execution from external memory, reducing on-chip flash requirements. |
Use Scenario: Retaining user-defined calibration data, network settings, and device identity across power cycles in smart sensors. IC Role / Device Role / Timing Role: Persistent parameter store updated infrequently via SPI write commands; leverages 4 KByte sector erase for atomic updates. Use Value: Guarantees data integrity over 100+ years with 100,000-cycle endurance, eliminating EEPROM wear-out concerns. |
| Industrial HMI Display Firmware | Edge Gateway OTA Update Cache |
|
Use Scenario: Hosting GUI assets, font tables, and localized language strings for touch-panel HMIs in factory automation panels. IC Role / Device Role / Timing Role: High-density serial flash serving as read-only resource archive; accessed via high-speed read (0BH opcode) at up to 80 MHz. Use Value: Delivers rapid asset streaming to display controllers without CPU intervention, improving UI responsiveness. |
Use Scenario: Caching downloaded firmware patches before validation and installation in cellular-connected IoT gateways. IC Role / Device Role / Timing Role: Temporary secure storage for encrypted OTA payloads; uses 64 KByte block erase for efficient payload overwrite. Use Value: Supports robust rollback capability and atomic update staging with minimal flash management overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST25VF040B-70-4C-QAE-T | Successor part; identical 4 Mbit density, 2.3–3.6V operation, but rated for 70 MHz max read (vs. 80 MHz); same SOIC-8 package and pinout | Lower maximum clock frequency limits throughput in bandwidth-critical boot paths | Select when 70 MHz suffices and long-term availability is prioritized over peak speed |
| AT25DF041-SSH-T | 4 Mbit SPI flash from Microchip (formerly Atmel); supports 80 MHz read, but uses different status register layout and lacks AAI programming mode | No Auto Address Increment - requires full address retransmission per byte/word, increasing update time | Choose only if legacy AT25DF toolchain compatibility is required and AAI is unused |
Compared with SST25PF040B-80-4C-QAE-T, SST25VF040B-70-4C-QAE-T trades 10 MHz read speed for extended product lifecycle, while AT25DF041-SSH-T sacrifices AAI efficiency for cross-family tooling alignment - neither offers pin-compatible drop-in replacement without firmware verification.
Availability
SST25PF040B-80-4C-QAE-T is available at Aetrix Electronics and suitable for firmware boot storage, configuration parameter retention, industrial HMI display assets, and edge gateway OTA update caching requiring stable component supply across multi-year production programs.
Supply support for SST25PF040B-80-4C-QAE-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and non-volatile memory solutions, with emphasis on industrial, automotive, and aerospace reliability standards.
The SST25PF series was designed specifically for high-reliability embedded firmware storage, leveraging SuperFlash technology to deliver superior endurance and data retention in space-constrained SPI interfaces.
FAQ
What is the maximum SPI clock frequency supported by SST25PF040B-80-4C-QAE-T?
The SST25PF040B-80-4C-QAE-T supports up to 80 MHz for high-speed read operations when powered at 2.7–3.6V, and 50 MHz when powered at 2.3–2.7V. This is explicitly defined in the datasheet's "High-Speed-Read" section and confirmed by the "80" in the part number suffix. The device maintains full functionality across both voltage ranges without derating other parameters.
Does SST25PF040B-80-4C-QAE-T support SPI Mode 0 and Mode 3 simultaneously?
Yes, SST25PF040B-80-4C-QAE-T natively supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) without hardware reconfiguration. The device detects the idle SCK state and samples SI on the rising edge while driving SO on the falling edge in either mode, enabling interoperability with diverse host controllers.
How does hardware end-of-write detection work on SST25PF040B-80-4C-QAE-T?
Hardware end-of-write detection on SST25PF040B-80-4C-QAE-T reconfigures the SO pin to output real-time RY/BY# status during Auto Address Increment (AAI) programming. This is enabled by issuing the EBSY command (70H) before AAI; SO then drives '0' when busy and '1' when ready, eliminating software polling of the BUSY bit in the status register.
What erase granularities are available on SST25PF040B-80-4C-QAE-T?
SST25PF040B-80-4C-QAE-T supports three uniform erase granularities: 4 KByte sectors (opcode 20H), 32 KByte overlay blocks (opcode 52H), and 64 KByte overlay blocks (opcode D8H). All require prior execution of the WREN command and respect software block protection (BP bits) and hardware WP# state.
Is SST25PF040B-80-4C-QAE-T still recommended for new designs?
No - SST25PF040B-80-4C-QAE-T is marked obsolete in its official datasheet (DS20005134B), with Microchip recommending migration to SST25VF040B-70-4C-QAE-T. While functional and available through authorized channels, new designs should use the successor part to ensure long-term supply and technical support.
SST25PF040B-80-4C-QAE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 80 MHz
- Write Cycle Time - Word, Page:
- 10µs
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (6x5)
SST25PF040B-80-4C-QAE-T FAQ
1.How can I place an order for SST25PF040B-80-4C-QAE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040B-80-4C-QAE-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SST25PF040B-80-4C-QAE-T reliable?
The price and inventory of SST25PF040B-80-4C-QAE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25PF040B-80-4C-QAE-T is usually 5 days.
3.What payment methods are accepted for SST25PF040B-80-4C-QAE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040B-80-4C-QAE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040B-80-4C-QAE-T?
SST25PF040B-80-4C-QAE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040B-80-4C-QAE-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SST25PF040B-80-4C-QAE-T?
For technical support, including SST25PF040B-80-4C-QAE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040B-80-4C-QAE-T requirements.
6.How does Aetrix verify that SST25PF040B-80-4C-QAE-T is sourced from the original manufacturer or authorized distributors?
All SST25PF040B-80-4C-QAE-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SST25PF040B-80-4C-QAE-T meets industry standards.
7.What is the process for return or replacement of SST25PF040B-80-4C-QAE-T?
All SST25PF040B-80-4C-QAE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040B-80-4C-QAE-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SST25PF040B-80-4C-QAE-T part is unused and in its original packaging.
Return procedure for SST25PF040B-80-4C-QAE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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