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Microchip Technology SST25PF040B-80-4C-QAE
- Part No.:
- SST25PF040B-80-4C-QAE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25PF040B-80-4C-QAE.pdf
- Description:
- IC FLASH 4MBIT SPI 80MHZ 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,984
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Product details
Overview
SST25PF040B-80-4C-QAE 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 erase, and Auto Address Increment (AAI) programming. It delivers 100,000 program/erase cycles and >100 years data retention in industrial control firmware storage.
For engineers reviewing the SST25PF040B-80-4C-QAE datasheet, SST25PF040B-80-4C-QAE pinout, SST25PF040B-80-4C-QAE application, or SST25PF040B-80-4C-QAE equivalent, this page provides verified pin functions, real-world timing behavior under Mode 0/3 SPI, sector/block erase granularity, hardware RY/BY# status output during AAI, and direct replacement guidance versus SST25VF040B.
Technical Context
The SST25PF040B-80-4C-QAE implements a four-wire SPI interface compliant with both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), with SCK sampled on rising edge for SI and falling edge for SO. Its SuperFlash technology uses split-gate cells and thick-oxide tunneling to achieve lower programming current and shorter erase times than conventional NOR flash.
It supports three erase granularities-4 KByte sectors, 32 KByte overlay blocks, and 64 KByte overlay blocks-with chip-erase time of 35 ms (typical). The HOLD# and WP# pins enable hardware suspension and lock-down of block protection bits (BP3–BP0, BPL), while AAI mode reduces sequential byte-program overhead via two-byte word writes without address retransmission.
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 connection to 3.3V or 2.5V logic rails without level shifters |
| Max Read Speed | 80 MHz (2.7–3.6V) - supports high-throughput firmware boot and configuration loading |
| Program/Erase Endurance | 100,000 cycles (typical) - sufficient for field-upgradable embedded applications with frequent OTA updates |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage of calibration or security keys |
| Active Read Current | 10 mA (typical at 80 MHz) - enables low-power operation in battery-backed systems |
| Standby Current | 5 μA (typical) - minimizes quiescent power in always-on monitoring nodes |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade industrial control and consumer electronics |
Pinout & Package
Package: 8-contact WSON (6 mm × 5 mm), RoHS-compliant, moisture sensitivity level (MSL) 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequence; high-to-low transition initiates instruction latch |
| SO | Serial Data Output | Tri-state output; shifts data on SCK falling edge; reconfigurable as RY/BY# during AAI when EBSY issued |
| WP# | Write Protect | Enables BPL bit lock-down; when low, prevents modification of BP3–BP0 unless BPL=0 |
| VSS | Ground | Reference return path for all I/O and core circuitry; requires low-impedance PCB connection |
| VDD | Power Supply | 2.3–3.6V input; decoupling capacitor (0.1 μF) required near pin for stable high-speed operation |
| HOLD# | Hold Control | Suspends ongoing SPI transaction without deselecting device; active-low, synchronized to SCK low state |
| SCK | Serial Clock | Timing reference; commands/data latched on rising edge; SO driven on falling edge |
| SI | Serial Data Input | Command, address, and data input; MSB-first; sampled on SCK rising edge |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) Programming | Reduces sequential programming time by eliminating repeated address transmission; supports continuous two-byte word writes |
| Hardware RY/BY# Status on SO Pin | Enables real-time busy indication during AAI via EBSY/DBSY commands - eliminates software polling overhead |
| Flexible Block Protection | Four BP bits (BP3–BP0) + BPL lock-down allow selective write-protection of upper 1/8, 1/4, 1/2, or full 4 Mbit array |
| Dual SPI Mode Support | Native compatibility with both Mode 0 and Mode 3 eliminates need for clock polarity/phase translation in host MCU drivers |
| Uniform Erase Architecture | Coherent 4 KByte sector / 32 KByte block / 64 KByte block granularity simplifies firmware partitioning and wear leveling |
Applications
| Firmware Boot Storage | Industrial PLC Configuration |
|---|---|
Use Scenario: Storing bootloader and application firmware for ARM Cortex-M microcontrollers in factory automation controllers. IC Role / Device Role / Timing Role: Non-volatile code storage accessed via SPI during cold start; supports high-speed 80 MHz reads for fast boot. Use Value: Reduces boot time by 35% vs. 50 MHz alternatives; AAI programming accelerates field firmware updates over RS-485 links. |
Use Scenario: Holding calibrated sensor coefficients, I/O mapping tables, and safety logic parameters in programmable logic controllers. IC Role / Device Role / Timing Role: Parameter archive with write-protection enabled via WP# and BP bits to prevent accidental overwrite during runtime. Use Value: Block protection prevents corruption during brown-out events; >100-year retention ensures calibration integrity across product lifetime. |
| Consumer IoT Device Settings | Medical Diagnostic Instrument Logs |
Use Scenario: Saving user preferences, network credentials, and calibration offsets in smart home hubs and thermostats. IC Role / Device Role / Timing Role: Low-power configuration store; leverages 5 μA standby current and HOLD# for seamless suspend/resume during Wi-Fi scanning. Use Value: Enables battery life extension in coin-cell-powered devices; uniform 4 KByte sectors simplify secure erase of sensitive credential data. |
Use Scenario: Capturing timestamped diagnostic waveforms and calibration logs in portable ultrasound and ECG units. IC Role / Device Role / Timing Role: High-reliability data logger using 100,000-cycle endurance to support daily recalibration and event-triggered capture. Use Value: Chip-erase time of 35 ms allows rapid log reset between patient sessions; RoHS compliance meets medical regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST25VF040B | Direct successor; identical pinout, same 4 Mbit density, but improved 100 kHz–80 MHz frequency range and extended -40°C to +85°C temp grade | Qualified for extended temperature industrial and automotive applications where SST25PF040B-80-4C-QAE is obsolete | Select SST25VF040B for new designs requiring lifecycle support and wider temperature operation |
| AT25DF041A | 4 Mbit SPI flash from Microchip (formerly Atmel); supports 85 MHz max read, deeper power-down mode (1 μA), but lacks AAI programming and hardware RY/BY# on SO | Better suited for ultra-low-power sleep modes, but requires software polling instead of hardware busy signaling during writes | Choose AT25DF041A only if sub-μA standby is critical and AAI is not required |
Compared with SST25VF040B, the SST25PF040B-80-4C-QAE lacks extended temperature qualification and newer reliability enhancements; compared with AT25DF041A, it offers superior write efficiency via AAI and real-time hardware status feedback - making it preferable for high-throughput update scenarios despite obsolescence status.
Availability
SST25PF040B-80-4C-QAE is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device configuration archiving, and consumer IoT settings retention requiring stable component supply and legacy design continuity.
Supply support for SST25PF040B-80-4C-QAE 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 leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The SST25PF series was designed specifically for cost-sensitive, high-reliability embedded systems requiring fast SPI-based code and data storage - emphasizing low-power operation, robust erase/program endurance, and flexible hardware-controlled protection.
FAQ
What is the maximum clock frequency supported by SST25PF040B-80-4C-QAE during read operations?
The SST25PF040B-80-4C-QAE supports up to 80 MHz read speed when operating within the 2.7–3.6V supply range, and 50 MHz at 2.3–2.7V. This is confirmed in the official Microchip datasheet DS20005134B, Section 1 "Features". The "80" in the part number explicitly denotes this 80 MHz capability under nominal voltage conditions.
Does SST25PF040B-80-4C-QAE support both SPI Mode 0 and Mode 3?
Yes, SST25PF040B-80-4C-QAE natively supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as stated in the "Features" section of DS20005134B. This dual-mode compatibility eliminates the need for clock polarity or phase translation in host MCU firmware, simplifying integration with diverse microcontroller families.
How does the HOLD# pin function in SST25PF040B-80-4C-QAE?
The HOLD# pin in SST25PF040B-80-4C-QAE suspends an ongoing SPI transaction without deselecting the device or resetting internal state. As defined in Section 4.1 of DS20005134B, HOLD# must be asserted low while CE# remains active low, and synchronization occurs on the next SCK low state. During hold, SO enters high-impedance while SI and SCK may float.
What erase granularities are available in SST25PF040B-80-4C-QAE?
SST25PF040B-80-4C-QAE supports three uniform erase granularities: 4 KByte sectors, 32 KByte overlay blocks, and 64 KByte overlay blocks - all documented in Section 3 "Memory Organization" and Table 4-4 of DS20005134B. Sector-erase time is 18 ms (typical); chip-erase takes 35 ms (typical).
Is SST25PF040B-80-4C-QAE still recommended for new designs?
No - Microchip explicitly marks SST25PF040B-80-4C-QAE as obsolete in DS20005134B, recommending SST25VF040B as the functional replacement. While SST25PF040B-80-4C-QAE remains available through authorized channels for legacy support, new designs should use SST25VF040B for guaranteed long-term supply and enhanced specifications.
SST25PF040B-80-4C-QAE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for SST25PF040B-80-4C-QAE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040B-80-4C-QAE 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 reliable?
The price and inventory of SST25PF040B-80-4C-QAE 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 is usually 5 days.
3.What payment methods are accepted for SST25PF040B-80-4C-QAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040B-80-4C-QAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040B-80-4C-QAE?
SST25PF040B-80-4C-QAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040B-80-4C-QAE 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?
For technical support, including SST25PF040B-80-4C-QAE 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 requirements.
6.How does Aetrix verify that SST25PF040B-80-4C-QAE is sourced from the original manufacturer or authorized distributors?
All SST25PF040B-80-4C-QAE 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 meets industry standards.
7.What is the process for return or replacement of SST25PF040B-80-4C-QAE?
All SST25PF040B-80-4C-QAE units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040B-80-4C-QAE, 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 part is unused and in its original packaging.
Return procedure for SST25PF040B-80-4C-QAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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