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Microchip Technology SST26VF040A-80E/SN
- Part No.:
- SST26VF040A-80E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST26VF040A-80E/SN.pdf
- Description:
- IC FLASH 4MBIT SPI/QUAD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:580
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Product details
Overview
SST26VF040A-80E/SN from Microchip Technology is a 4-Mbit Serial Quad I/O™ (SQI™) Flash memory IC supporting dual-voltage operation (2.3V–3.6V), 80 MHz max clock frequency (Extended temperature), uniform 4-Kbyte sectors, and hardware/software write protection. It serves as nonvolatile program/data storage in microcontroller boot loaders and firmware update modules.
For engineers reviewing the SST26VF040A-80E/SN datasheet, SST26VF040A-80E/SN pinout, SST26VF040A-80E/SN application, or SST26VF040A-80E/SN equivalent, key selection criteria include SQI/x4 SPI protocol support, 100,000 erase/write cycles, OTP Security ID, write-suspend capability, and AEC-Q100 qualification for automotive use.
Technical Context
The SST26VF040A-80E/SN implements a six-wire, 4-bit multiplexed I/O interface with full backward compatibility to standard SPI (x1/x2/x4 modes), supporting both Mode 0 and Mode 3 clock polarity. Its SuperFlash® split-gate cell architecture enables fast erase (20 ms sector, 40 ms chip) and low active current (15 mA @ 104 MHz).
It features configurable I/O mapping via the IOC bit: WP#/SIO2 and RESET#/HOLD#/SIO3 pins serve dual roles depending on protocol mode, and the Configuration register controls volatile lock protection (VLP), security ID status (SEC), and RST#/HOLD# function selection (RSTHLD bit).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 Kbytes), organized in uniform 4-Kbyte sectors |
| Interface Protocol | Serial Quad I/O™ (SQI™) with full x1/x2/x4 SPI command-set compatibility |
| Max Clock Frequency | 80 MHz (2.3V–3.6V, Extended temp range –40°C to +125°C) |
| Erase Endurance | 100,000 cycles minimum per sector |
| Data Retention | Greater than 100 years at +85°C |
| Write Protection | Software block protection (BP0–BP3), hardware WP# pin, and OTP Security ID lockout |
| Power Supply | Single 2.3V–3.6V supply; no VCC/VPP separation required |
Pinout & Package
Package: 8-lead SOIC (3.90 mm) - RoHS-compliant, industrial-grade footprint compatible with legacy SPI flash layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequence |
| SO/SIO1 | Serial Output / Quad I/O 1 | Default SPI output pin; reconfigured as SIO1 in SQI mode after EQIO command |
| WP#/SIO2 | Write-Protect Input / Quad I/O 2 | Hardware write-protection control in SPI mode; becomes SIO2 in SQI mode when IOC=1 |
| VSS | Ground | Reference return path for all internal circuitry and I/O buffers |
| VDD | Power Supply | 2.3V–3.6V single supply; powers core logic, memory array, and I/O drivers |
| RESET#/HOLD#/SIO3 | Reset/Hold Select / Quad I/O 3 | Configurable via RSTHLD bit: functions as RESET# (IOC=0) or HOLD# (IOC=0) or SIO3 (IOC=1) |
| SCK | Serial Clock | Timing reference for all serial transfers; rising edge latches input, falling edge shifts out data |
| SI/SIO0 | Serial Input / Quad I/O 0 | Default SPI input pin; reconfigured as SIO0 in SQI mode after EQIO command |
Key Features
| Feature | Design Value |
|---|---|
| Quad I/O Interface | Enables 4× data throughput vs. standard SPI at same clock frequency using SIO[3:0] multiplexing |
| Write-Suspend Capability | Allows temporary interruption of erase/program operations to service higher-priority reads or writes |
| OTP Security ID | 2-Kbyte area with factory-programmed 128-bit unique ID + user-programmable segment, lockable via LSID command |
| Flexible Erase Granularity | Supports 4-Kbyte sector, 32-Kbyte block, 64-Kbyte block, and full-chip erase with consistent timing |
| AEC-Q100 Qualified | Validated for automotive applications across –40°C to +125°C extended temperature range |
Applications
| Automotive Infotainment Boot Storage | Industrial PLC Firmware Update Module |
|---|---|
Use Scenario: Stores boot code and firmware images for head unit MCUs requiring secure, field-upgradable storage. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast read access (80 MHz SQI), write-suspend for concurrent diagnostics, and OTP ID for anti-cloning. Use Value: Enables authenticated firmware updates without interrupting real-time CAN bus operation due to write-suspend and AEC-Q100 reliability. | Use Scenario: Holds configuration parameters and safety-critical firmware patches in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: High-reliability data retention (>100 years) and 100K-cycle endurance ensure long-term integrity of calibration data across thermal cycling. Use Value: Eliminates need for external EEPROM backup by providing guaranteed data retention under 85°C ambient and vibration stress. |
| Medical Device Calibration Data Vault | Smart Energy Meter Secure Parameter Storage |
Use Scenario: Stores factory-calibrated sensor coefficients and regulatory audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Security ID lockout (LSID) prevents tampering; hardware WP# + software BP bits enforce multi-layer write protection. Use Value: Meets IEC 62304 traceability requirements via immutable 128-bit factory ID and user-programmable secure log space. | Use Scenario: Retains tariff tables, cryptographic keys, and metering history in ANSI C12.22-compliant smart meters operating at –40°C to +85°C. IC Role / Device Role / Timing Role: Extended temperature rating and 4-Kbyte uniform sectors enable precise, sector-level key revocation and firmware rollback. Use Value: Supports FIPS 140-2 Level 2 compliance through isolated, lockable Security ID space and hardware-enforced write protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q40EW | 4-Mbit SPI-only (no SQI), 104 MHz max, 1.65V–1.95V/2.7V–3.6V dual supply | Lacks SQI interface and OTP Security ID; supports lower voltage but no AEC-Q100 grade | Select when cost-sensitive SPI-only designs require lowest standby current (1 µA) and do not need automotive qualification or secure ID. |
| Cypress S25FL004K | 4-Mbit HyperBus™ interface (not SPI/SQI compatible), 133 MHz, 2.7V–3.6V only | Requires HyperBus controller; no software reset, no write-suspend, no Security ID | Choose only for existing HyperBus-based SoC platforms where pin count and bandwidth outweigh protocol flexibility and security needs. |
Compared with W25Q40EW and S25FL004K, SST26VF040A-80E/SN uniquely combines SQI/x4 SPI interoperability, AEC-Q100 qualification, OTP Security ID, and write-suspend-making it the only option among the three suitable for secure, automotive-grade firmware storage with concurrent access capability.
Availability
SST26VF040A-80E/SN is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLCs, and medical diagnostic devices requiring stable component supply, long-life data retention, and certified functional safety support.
Supply support for SST26VF040A-80E/SN 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 semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with emphasis on embedded control and reliability-critical applications.
The SST26VF040A-80E/SN belongs to Microchip's Serial Quad I/O™ Flash family, designed specifically for high-performance, low-pin-count nonvolatile storage in automotive, industrial, and medical systems demanding secure, field-upgradable firmware.
FAQ
What voltage range does the SST26VF040A-80E/SN support for reliable operation?
The SST26VF040A-80E/SN operates reliably across a single 2.3V–3.6V supply range. This dual-voltage capability allows direct integration into both 2.5V and 3.0V system rails without level-shifting. The 80 MHz maximum clock frequency is specified under 2.3V–3.6V conditions at extended temperature (–40°C to +125°C), and the device maintains full functionality-including SQI mode, write-suspend, and Security ID programming-across this entire voltage window. No separate VPP or auxiliary supplies are required.
Does the SST26VF040A-80E/SN support true pin-compatible replacement for legacy SPI flash devices?
Yes-the SST26VF040A-80E/SN uses an 8-lead SOIC package with identical pinout and mechanical dimensions to industry-standard SPI flash devices such as the AT25DF041 and W25X40. Its default power-on state is SPI x1 mode, and all standard SPI commands (03H read, 02H page program, 20H sector erase) are fully supported. Hardware connections for CE#, SCK, SI, SO, WP#, and HOLD# match legacy layouts, enabling drop-in replacement without PCB revision-provided the host controller supports the extended instruction set for SQI and enhanced protection features.
How is the Security ID implemented in the SST26VF040A-80E/SN, and can it be reprogrammed?
The SST26VF040A-80E/SN includes a 2-Kbyte Security ID (Sec ID) space divided into two segments: a factory-programmed 128-bit unique identifier (immutable, unerasable) and a user-programmable area (2048 bytes minus 16 bytes). Programming is performed via the PSID command; once locked with the LSID command, the entire Sec ID space becomes permanently read-only-the SEC bit in the Configuration register then reads '1' and cannot be cleared. Neither segment supports erasure, ensuring cryptographic binding between hardware identity and firmware.
What is the purpose of the IOC bit in the Configuration register of the SST26VF040A-80E/SN?
The IOC (I/O Configuration) bit (bit 1 of the Configuration register) determines whether the SST26VF040A-80E/SN operates in legacy SPI mode (IOC = 0) or SQI mode (IOC = 1). When IOC = 0, pins WP# and RESET#/HOLD# retain their dedicated hardware functions; when IOC = 1, those pins become SIO2 and SIO3, enabling full 4-bit multiplexed I/O. The IOC bit must be set before issuing SQI-specific commands (e.g., 6BH, EBH, 32H), and it has no effect in SQI protocol mode-only in SPI command interpretation.
Can the SST26VF040A-80E/SN perform simultaneous read and write operations?
No-the SST26VF040A-80E/SN does not support true concurrent read-while-write (RWW). However, it provides write-suspend functionality: during an active program or erase operation, the WRSU command pauses execution, allowing immediate read access to any unprotected memory region. After servicing the read, WRRE resumes the suspended operation. This enables deterministic latency control in real-time systems-e.g., reading sensor logs while updating firmware-without data corruption or bus arbitration overhead.
SST26VF040A-80E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST26 SQI®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- SPI - Quad I/O
- Clock Frequency:
- 80 MHz
- Write Cycle Time - Word, Page:
- 1.5ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SST26VF040A-80E/SN FAQ
1.How can I place an order for SST26VF040A-80E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for SST26VF040A-80E/SN 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 SST26VF040A-80E/SN reliable?
The price and inventory of SST26VF040A-80E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST26VF040A-80E/SN is usually 5 days.
3.What payment methods are accepted for SST26VF040A-80E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST26VF040A-80E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST26VF040A-80E/SN?
SST26VF040A-80E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST26VF040A-80E/SN 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 SST26VF040A-80E/SN?
For technical support, including SST26VF040A-80E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST26VF040A-80E/SN requirements.
6.How does Aetrix verify that SST26VF040A-80E/SN is sourced from the original manufacturer or authorized distributors?
All SST26VF040A-80E/SN 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 SST26VF040A-80E/SN meets industry standards.
7.What is the process for return or replacement of SST26VF040A-80E/SN?
All SST26VF040A-80E/SN units undergo pre-shipment inspection (PSI). If there is an issue with SST26VF040A-80E/SN, 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 SST26VF040A-80E/SN part is unused and in its original packaging.
Return procedure for SST26VF040A-80E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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