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Microchip Technology SST25VF040B-80-4I-QAE
- Part No.:
- SST25VF040B-80-4I-QAE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25VF040B-80-4I-QAE.pdf
- Description:
- IC FLASH 4MBIT SPI 80MHZ 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,276
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Product details
Overview
SST25VF040B-80-4I-QAE from Microchip Technology is a 4 Mbit (512 K × 8) SPI serial flash memory IC designed for embedded firmware storage, boot code retention, and configuration data in space-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 blocks, and delivers 100,000 program/erase cycles with >100-year data retention - deployed in industrial controllers and IoT edge nodes.
For engineers reviewing the SST25VF040B-80-4I-QAE datasheet, SST25VF040B-80-4I-QAE pinout, SST25VF040B-80-4I-QAE application, or SST25VF040B-80-4I-QAE equivalent, key selection considerations include its 80 MHz high-speed read capability, industrial temperature range (–40°C to +85°C), WSON-8 (6 mm × 5 mm) package, hardware RY/BY# status output during AAI programming, and software/hardware end-of-write detection support.
Technical Context
The SST25VF040B-80-4I-QAE 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 flash.
It supports three erase granularities - 4 KByte sectors, 32 KByte blocks, and 64 KByte blocks - and offers Auto Address Increment (AAI) word-programming to reduce sequential write overhead. End-of-write detection is implemented via software polling of the BUSY bit or hardware RY/BY# status on SO during AAI mode, enabled by EBSY (70H) and disabled by DBSY (80H) commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 K × 8 bits); sufficient for bootloader + FPGA configuration + parameter storage in compact MCU systems |
| Max Read Speed | 80 MHz (High-Speed Read, 0BH command with dummy byte); enables sub-μs access latency for real-time firmware fetch |
| Erase Endurance | 100,000 cycles (typical); supports frequent field-upgrade scenarios without premature wear-out |
| Data Retention | >100 years at +25°C; ensures long-term reliability in unattended industrial deployments |
| Supply Voltage | 2.7–3.6 V; compatible with 3.3 V logic rails and brown-out tolerant power domains |
| Operating Temp | –40°C to +85°C (Industrial grade); validated for use in motor drives, PLCs, and outdoor gateways |
| Active Read Current | 10 mA (typical at 80 MHz); enables low-power operation during burst reads in battery-backed systems |
| Standby Current | 5 µA (typical); minimizes quiescent draw during sleep modes in always-on edge devices |
Pinout & Package
Package: 8-contact WSON (6 mm × 5 mm, QAE suffix), RoHS-compliant, moisture-sensitive level 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 execution |
| SCK | Serial Clock | Timing reference for SPI; 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 output path; also reconfigurable as RY/BY# (ready/busy) during AAI programming when EBSY (70H) is issued |
| WP# | Write Protect | Enables lock-down of Block-Protection bits (BP3–BP0) via BPL bit; low = BPL active, preventing status register modification |
| HOLD# | Hold | Suspends ongoing SPI transaction without deselecting device; allows host to service higher-priority interrupts mid-sequence |
| VDD | Power Supply | 2.7–3.6 V supply; powers core logic and memory array; decoupling capacitor required per layout guidelines |
| VSS | Ground | Reference return path; requires low-impedance connection to system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell architecture reduces program current and erase time vs. standard NOR flash, lowering total energy per operation |
| Hardware RY/BY# on SO | Enables real-time busy status reporting during AAI programming without software polling overhead - improves host CPU efficiency |
| Flexible Erase Granularity | Independent 4 KByte sector, 32 KByte block, and 64 KByte block erase options allow precise wear leveling and partial firmware updates |
| Auto Address Increment (AAI) | Two-byte word programming without reissuing address saves ~40% SPI bus cycles vs. Byte-Program for contiguous writes |
| Software Write Protection | Configurable BP3–BP0 bits protect memory regions from accidental overwrite; BPL bit locks protection settings permanently when WP# is low |
| Industrial Temperature Range | Validated operation from –40°C to +85°C ensures reliability in harsh environments without derating or thermal management |
Applications
| Firmware Boot Storage | IoT Edge Device Configuration |
|---|---|
Use Scenario: Storing boot code for ARM Cortex-M microcontrollers in factory automation gateways. IC Role / Device Role / Timing Role: Non-volatile boot memory mapped via SPI XIP or copied to RAM at power-up; provides deterministic startup timing. Use Value: 80 MHz high-speed read reduces boot time by ~3× vs. 33 MHz alternatives; 4 KByte sector erase enables safe dual-bank OTA updates. |
Use Scenario: Holding calibrated sensor offsets, network credentials, and device-specific parameters in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Configuration data store accessed infrequently but requiring guaranteed retention over 10+ years. Use Value: >100-year data retention and 100,000-cycle endurance ensure field-deployed units retain settings across multiple firmware revisions and battery replacements. |
| Industrial PLC Program Storage | FPGA Bitstream Storage |
Use Scenario: Hosting ladder logic programs and I/O mapping tables in programmable logic controllers operating in factory floors. IC Role / Device Role / Timing Role: Field-upgradable program memory supporting hot-swappable modules and version-controlled firmware rollouts. Use Value: 64 KByte block erase allows atomic replacement of full control programs; HOLD# pin enables seamless interrupt handling during long write operations. |
Use Scenario: Storing compressed FPGA configuration bitstreams for Xilinx Spartan or Lattice iCE40 devices in compact vision systems. IC Role / Device Role / Timing Role: SPI-configured non-volatile memory providing reliable bitstream loading at power-on reset. Use Value: WSON-8 package fits tight PCB footprints; 80 MHz read speed meets FPGA configuration timing budgets for sub-100 ms startup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI serial flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q40EW | 4 Mbit density, 104 MHz max read, DTR support, 1.65–1.95 V or 2.7–3.6 V dual voltage; no AAI mode | Higher speed and dual-voltage flexibility, but lacks AAI programming and hardware RY/BY# on SO | Select for systems needing faster read throughput or ultra-low-voltage operation; verify compatibility with existing AAI-based firmware writers |
| Cypress S25FL004A | 4 Mbit density, 50 MHz max read, supports SFDP, no HOLD# pin, different status register layout | Lower max clock rate and missing HOLD# limits use in interrupt-sensitive real-time hosts | Choose when SFDP compliance or Cypress ecosystem tooling is required; avoid if HOLD# or 80 MHz read is mandatory |
Compared with SST25VF040B-80-4I-QAE, W25Q40EW offers higher bandwidth but removes AAI and hardware busy signaling, while S25FL004A sacrifices speed and suspend capability - making SST25VF040B-80-4I-QAE optimal for cost-sensitive industrial designs requiring robust, low-overhead SPI flash with proven field reliability.
Availability
SST25VF040B-80-4I-QAE is available at Aetrix Electronics and suitable for industrial PLCs, IoT edge gateways, and FPGA-based vision systems requiring stable component supply, long-lifecycle assurance, and RoHS-compliant WSON packaging.
Supply support for SST25VF040B-80-4I-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 global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with deep expertise in embedded control and secure connectivity.
The SST25VF040B-80-4I-QAE belongs to Microchip's legacy SST25 serial flash product line, engineered for cost-effective, high-reliability non-volatile storage in resource-constrained industrial and automotive-adjacent applications.
FAQ
What is the maximum clock frequency supported by SST25VF040B-80-4I-QAE for high-speed read operations?
The SST25VF040B-80-4I-QAE supports up to 80 MHz for High-Speed Read operations using the 0BH command with a dummy byte. This is confirmed in the DS25051A datasheet section "High-Speed-Read (50/80 MHz)" and distinguishes it from the -50 variant (50 MHz) and -33 variant (33 MHz). The 80 MHz rating applies specifically to the SST25VF040B-80-4I-QAE part number under industrial temperature conditions.
Does SST25VF040B-80-4I-QAE support both SPI Mode 0 and Mode 3?
Yes, SST25VF040B-80-4I-QAE explicitly supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as stated in the "Features" section and detailed in Figure 3 of the DS25051A datasheet. The device samples SI on the rising edge of SCK and drives SO on the falling edge in both modes, ensuring interoperability with diverse host controllers.
What package type does SST25VF040B-80-4I-QAE use, and what does the 'QAE' suffix indicate?
The SST25VF040B-80-4I-QAE uses an 8-contact WSON package measuring 6 mm × 5 mm, as confirmed in the "Packages Available" section and Figure 2 of the DS25051A datasheet. The 'QAE' suffix denotes this specific WSON-8 variant with industrial temperature range (–40°C to +85°C) and RoHS compliance - distinct from SOIC variants (e.g., '-4C' or '-4I' with SOIC-8).
How does the HOLD# pin function during active SPI communication in SST25VF040B-80-4I-QAE?
The HOLD# pin in SST25VF040B-80-4I-QAE suspends ongoing SPI transactions without resetting internal state or requiring CE# deassertion. As defined in the "Hold Operation" section, HOLD# must be asserted low while CE# is active low; SCK must be in its inactive state (low for Mode 0, high for Mode 3) at the time of assertion. During hold, SO enters high-impedance, allowing the host to service interrupts before resuming.
Can SST25VF040B-80-4I-QAE perform chip-erase when block protection bits are set?
No, SST25VF040B-80-4I-QAE cannot execute Chip-Erase (60H/C7H) if any block protection bits (BP3–BP0) are set to a non-zero value. Per Table 4 and the "Block Protection" section of DS25051A, Chip-Erase is only permitted when all BP bits are 0. This safeguard prevents accidental erasure of protected firmware or configuration data, enforcing design-level security through hardware-enforced write locking.
SST25VF040B-80-4I-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:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (6x5)
SST25VF040B-80-4I-QAE FAQ
1.How can I place an order for SST25VF040B-80-4I-QAE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF040B-80-4I-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 SST25VF040B-80-4I-QAE reliable?
The price and inventory of SST25VF040B-80-4I-QAE 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-QAE is usually 5 days.
3.What payment methods are accepted for SST25VF040B-80-4I-QAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF040B-80-4I-QAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF040B-80-4I-QAE?
SST25VF040B-80-4I-QAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF040B-80-4I-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 SST25VF040B-80-4I-QAE?
For technical support, including SST25VF040B-80-4I-QAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25VF040B-80-4I-QAE requirements.
6.How does Aetrix verify that SST25VF040B-80-4I-QAE is sourced from the original manufacturer or authorized distributors?
All SST25VF040B-80-4I-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 SST25VF040B-80-4I-QAE meets industry standards.
7.What is the process for return or replacement of SST25VF040B-80-4I-QAE?
All SST25VF040B-80-4I-QAE units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF040B-80-4I-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 SST25VF040B-80-4I-QAE part is unused and in its original packaging.
Return procedure for SST25VF040B-80-4I-QAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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