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Microchip Technology SST25VF040B-80-4I-S2AE-T
- Part No.:
- SST25VF040B-80-4I-S2AE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SST25VF040B-80-4I-S2AE-T.pdf
- Description:
- IC FLASH 4MBIT SPI 80MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,806
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Product details
Overview
SST25VF040B-80-4I-S2AE-T from Microchip Technology is a 4 Mbit (512 K × 8) SPI serial flash memory IC designed for embedded firmware storage and code execution in resource-constrained systems. It operates at 2.7–3.6 V, supports up to 80 MHz high-speed read via 0BH command, features uniform 4 KByte sectors and 64 KByte overlay blocks, and delivers 100,000 program/erase cycles with >100-year data retention - used in industrial microcontroller boot loaders and FPGA configuration storage.
For engineers reviewing the SST25VF040B-80-4I-S2AE-T datasheet, SST25VF040B-80-4I-S2AE-T pinout, SST25VF040B-80-4I-S2AE-T application, or SST25VF040B-80-4I-S2AE-T equivalent, key selection considerations include its industrial temperature range (–40°C to +85°C), SOIC-8 (200 mil) package, hardware RY/BY# status output during AAI programming, and software block-protection granularity down to 4 KByte sectors.
Technical Context
The SST25VF040B-80-4I-S2AE-T implements a four-wire SPI interface compliant with Mode 0 and Mode 3 protocols, using CE#, SCK, SI, and SO signals for command/address/data transfer. Its SuperFlash technology employs a split-gate cell with thick-oxide tunneling injector, enabling lower programming current and shorter erase times versus conventional NOR flash.
It supports three erase granularities - 4 KByte sectors, 32 KByte blocks, and 64 KByte blocks - and includes Auto Address Increment (AAI) word-programming to reduce sequential write overhead. End-of-write detection is available via software polling of the BUSY bit or hardware RY/BY# status on SO during AAI mode after issuing EBSY (70H).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 K × 8 bits); sufficient for full MCU boot code or FPGA configuration bitstream in compact designs. |
| Max Clock Frequency | 80 MHz for High-Speed Read (0BH command); enables <12.5 ns effective access time for real-time code fetch. |
| Supply Voltage | 2.7–3.6 V single supply; compatible with 3.3 V logic domains without level shifting. |
| Endurance | 100,000 program/erase cycles (typical); supports frequent firmware updates in field-deployed devices. |
| Data Retention | >100 years at +25°C; ensures long-term reliability in unattended industrial equipment. |
| Erase Granularity | Uniform 4 KByte sectors, 32 KByte and 64 KByte overlay blocks; allows precise firmware partitioning and OTA update management. |
| Active Read Current | 10 mA (typical at 80 MHz); low dynamic power enables battery-backed or energy-harvesting applications. |
| Standby Current | 5 µA (typical); minimizes quiescent power in always-on monitoring systems. |
Pinout & Package
Package: 8-lead SOIC (200 mils), RoHS-compliant, surface-mountable with standard reflow profile.
| 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 decoding. |
| SCK | Serial Clock | Timing reference for SPI interface; rising edge latches SI input; falling edge outputs SO data; supports Mode 0 (SCK idle low) and Mode 3 (SCK idle high). |
| SI | Serial Data Input | Command, address, and data input path; MSB-first; sampled on SCK rising edge. |
| SO | Serial Data Output | Data and status output; shifts out on SCK falling edge; reconfigurable as RY/BY# during AAI mode when EBSY (70H) issued. |
| WP# | Write Protect | Enables lock-down of Block-Protection Lock (BPL) bit; when low, BPL=1 prevents modification of BP3–BP0 protection bits. |
| HOLD# | Hold | Suspends ongoing SPI transaction without deselecting device; maintains internal state and clock alignment; resumes on rising edge synchronized to SCK low. |
| VDD | Power Supply | 2.7–3.6 V core and I/O supply; decoupling capacitor required per datasheet layout guidelines. |
| VSS | Ground | Reference return path for all digital and analog circuitry; must be low-impedance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) Programming | Reduces sequential byte-program time by eliminating repeated address transmission; supports continuous 2-byte word writes until WRDI issued. |
| Hardware RY/BY# Status on SO | Enables real-time busy indication during AAI mode without software polling; reduces CPU overhead and improves deterministic timing. |
| Flexible Block Protection | Software-configurable BP3–BP0 bits protect memory regions from 0 to full 4 Mbit array; supports secure bootloader and parameter partitioning. |
| SuperFlash Technology | Split-gate cell architecture delivers lower program current and faster erase vs. standard NOR flash, reducing total energy per operation. |
| Industrial Temperature Range | –40°C to +85°C operation; qualified for use in motor drives, PLCs, and outdoor IoT gateways without thermal derating. |
| RoHS-Compliant Packaging | Lead-free 8-lead SOIC (200 mil) meets global environmental compliance requirements for industrial and medical end equipment. |
Applications
| MCU Boot Memory | FPGA Configuration Storage |
|---|---|
Use Scenario: Storing boot firmware for ARM Cortex-M or RISC-V microcontrollers in industrial controllers. IC Role / Device Role / Timing Role: Non-volatile code storage accessed via SPI during cold start; supports XIP (execute-in-place) with 80 MHz high-speed read. Use Value: Enables fast boot (<50 ms) and eliminates external parallel NOR requirement, reducing PCB area and BOM cost. |
Use Scenario: Holding configuration bitstreams for Xilinx Spartan or Intel MAX 10 FPGAs in programmable logic systems. IC Role / Device Role / Timing Role: SPI master-initiated serial configuration loader; supports active-serial (AS) mode with sector-erase granularity for partial reconfiguration. Use Value: Allows field-upgradable logic images with verified 4 KByte sector erase, minimizing downtime during firmware patches. |
| IoT Edge Device Firmware | Medical Instrument Parameter Storage |
Use Scenario: Hosting over-the-air (OTA) firmware updates in battery-powered wireless sensors. IC Role / Device Role / Timing Role: Dual-bank firmware storage with AAI programming; supports atomic update via sector swap and CRC-verified write. Use Value: Achieves sub-second firmware commit with 5 µA standby current, extending battery life in multi-year deployments. |
Use Scenario: Retaining calibrated sensor offsets, user preferences, and audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure non-volatile parameter store with software write protection (BP bits) and >100-year data retention. Use Value: Ensures regulatory compliance (IEC 62304) by preventing accidental overwrite of calibration data during routine operation. |
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 |
|---|---|---|---|
| Winbond W25Q40EW | 4 Mbit density, 104 MHz max read, Quad SPI support, 1.65–1.95 V or 2.7–3.6 V dual supply options. | Supports QPI/DTR modes for higher throughput; lacks HOLD# pin and hardware RY/BY# on SO. | Choose W25Q40EW only if Quad SPI bandwidth or ultra-low voltage operation is required; not drop-in for SST25VF040B-80-4I-S2AE-T's HOLD#/AAI/RY-BY# feature set. |
| Cypress S25FL004A | 4 Mbit density, 50 MHz max read, supports SFDP, no AAI mode, different status register bit mapping (BP2/BP1/BP0 only). | Requires different initialization sequence; no hardware busy indication on SO; limited block protection flexibility. | Select S25FL004A only for legacy Cypress-based designs; requires firmware adaptation for status register reads and erase command timing. |
Compared with Winbond W25Q40EW and Cypress S25FL004A, the SST25VF040B-80-4I-S2AE-T uniquely combines 80 MHz read speed, AAI programming, HOLD# suspend capability, and hardware RY/BY# status - making it optimal for deterministic, low-overhead firmware storage in industrial MCUs where SPI simplicity and timing predictability are critical.
Availability
SST25VF040B-80-4I-S2AE-T is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and IoT edge node firmware storage requiring stable component supply across extended product lifecycles.
Supply support for SST25VF040B-80-4I-S2AE-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 global provider of microcontrollers, analog components, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its serial flash portfolio.
The SST25VF040B-80-4I-S2AE-T belongs to the SST25VF family of SPI serial flash memories, engineered specifically for cost-sensitive, space-constrained embedded applications demanding high reliability, low power, and industrial-grade temperature performance.
FAQ
What is the maximum operating frequency of the SST25VF040B-80-4I-S2AE-T?
The SST25VF040B-80-4I-S2AE-T supports up to 80 MHz for High-Speed Read operations using the 0BH command. This is confirmed in the datasheet (DS25051A, page 11) and distinguishes it from the -50 variant (50 MHz) and -33 variant (33 MHz). The 80 MHz rating applies only to read commands; write/erase operations follow standard SPI timing with no frequency dependency beyond SCK setup/hold requirements. SST25VF040B-80-4I-S2AE-T achieves this speed while maintaining full compatibility with Mode 0 and Mode 3 SPI protocols.
Does the SST25VF040B-80-4I-S2AE-T support hardware busy indication during programming?
Yes, the SST25VF040B-80-4I-S2AE-T supports hardware RY/BY# status output on the SO pin during Auto Address Increment (AAI) programming. This requires issuing the EBSY command (70H) first to reconfigure SO as a ready/busy indicator. While active, SO outputs '0' when busy and '1' when ready - eliminating software polling overhead. This feature is documented on pages 12–14 of DS25051A and is exclusive to AAI mode; it is not available during standard Byte-Program or erase operations. SST25VF040B-80-4I-S2AE-T does not support this function outside AAI context.
What package type is used for the SST25VF040B-80-4I-S2AE-T?
The SST25VF040B-80-4I-S2AE-T uses an 8-lead SOIC package with 200 mil body width (standard JEDEC MS-012AC), as specified in the datasheet (DS25051A, page 4, Figure 2). This is distinct from the 150 mil SOIC and 6 mm × 5 mm WSON variants offered in the same family. The -S2AE-T suffix explicitly denotes the 200 mil SOIC industrial-grade variant with tape-and-reel packaging. SST25VF040B-80-4I-S2AE-T is RoHS-compliant and rated for –40°C to +85°C operation.
How does the SST25VF040B-80-4I-S2AE-T implement write protection?
The SST25VF040B-80-4I-S2AE-T provides dual-layer write protection: hardware via the WP# pin (enabling BPL bit lock-down) and software via BP3–BP0 bits in the status register. When WP# is low, BPL=1 prevents modification of BP bits; when WP# is high, BP bits are writable to define protected memory regions - from none to full 4 Mbit array - in 4 KByte, 32 KByte, or 64 KByte increments. This is detailed in Table 4 (page 8) of DS25051A. SST25VF040B-80-4I-S2AE-T requires both layers to be configured correctly to prevent unintended writes during field operation.
What erase options are available on the SST25VF040B-80-4I-S2AE-T?
The SST25VF040B-80-4I-S2AE-T supports four erase methods: Chip-Erase (60H/C7H), 64 KByte Block-Erase (D8H), 32 KByte Block-Erase (52H), and 4 KByte Sector-Erase (20H). All erase operations require prior Write-Enable (06H) and are self-timed, with typical durations of 35 ms (chip), 18 ms (sector/block). Erase commands ignore protected regions defined by BP bits. The memory array is organized into sixty-four 64 KByte blocks, each divisible into sixteen 4 KByte sectors - enabling fine-grained firmware update management. SST25VF040B-80-4I-S2AE-T does not support partial-sector or byte-level erase.
SST25VF040B-80-4I-S2AE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- 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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SST25VF040B-80-4I-S2AE-T FAQ
1.How can I place an order for SST25VF040B-80-4I-S2AE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF040B-80-4I-S2AE-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 SST25VF040B-80-4I-S2AE-T reliable?
The price and inventory of SST25VF040B-80-4I-S2AE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25VF040B-80-4I-S2AE-T is usually 5 days.
3.What payment methods are accepted for SST25VF040B-80-4I-S2AE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF040B-80-4I-S2AE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF040B-80-4I-S2AE-T?
SST25VF040B-80-4I-S2AE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF040B-80-4I-S2AE-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 SST25VF040B-80-4I-S2AE-T?
For technical support, including SST25VF040B-80-4I-S2AE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25VF040B-80-4I-S2AE-T requirements.
6.How does Aetrix verify that SST25VF040B-80-4I-S2AE-T is sourced from the original manufacturer or authorized distributors?
All SST25VF040B-80-4I-S2AE-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 SST25VF040B-80-4I-S2AE-T meets industry standards.
7.What is the process for return or replacement of SST25VF040B-80-4I-S2AE-T?
All SST25VF040B-80-4I-S2AE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF040B-80-4I-S2AE-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 SST25VF040B-80-4I-S2AE-T part is unused and in its original packaging.
Return procedure for SST25VF040B-80-4I-S2AE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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