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Microchip Technology SST25PF040CT-40E/SN18GVAO
- Part No.:
- SST25PF040CT-40E/SN18GVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25PF040CT-40E/SN18GVAO.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,297
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Product details
Overview
SST25PF040CT-40E/SN18GVAO from Microchip Technology is a 4 Mbit SPI serial flash memory IC with SuperFlash technology, supporting 2.3–3.6 V single-supply operation, 40 MHz high-speed read (via Fast-Read Dual I/O), and uniform 4 KByte sector/64 KByte block erase architecture. It serves as nonvolatile program/data storage in microcontroller boot loaders, firmware update buffers, and industrial HMI configuration storage.
For engineers reviewing the SST25PF040CT-40E/SN18GVAO datasheet, SST25PF040CT-40E/SN18GVAO pinout, SST25PF040CT-40E/SN18GVAO application, or SST25PF040CT-40E/SN18GVAO equivalent, key selection considerations include its AEC-Q100 qualified automotive temperature range (−40°C to +125°C), dual I/O interface timing compliance, 256-byte page programming granularity, and hardware write protection via HOLD# and WP# pins.
Technical Context
This device implements a four-wire SPI-compatible serial interface (Mode 0 and Mode 3) with dedicated SI/SIO0 and SO/SIO1 bidirectional pins enabling Fast-Read Dual Output (3BH) and Fast-Read Dual I/O (BBH) commands. Its SuperFlash split-gate cell architecture delivers 100,000 program/erase cycles and >20 years data retention without requiring high-voltage assist circuits.
Internal control logic supports end-of-write detection via BUSY bit polling, software-configurable block protection (BP0–BP2, TB, BPL), and suspend/resume capability through HOLD# pin assertion during active CE#-all while maintaining full compatibility with standard SPI host controllers and legacy SST25 series command sets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte), organized as 128 × 4 KByte sectors and 8 × 64 KByte overlay blocks |
| Operating Voltage | 2.3–3.6 V single supply - enables direct interfacing with 3.3 V logic without level shifters |
| Max Clock Frequency | 40 MHz - achievable only with High-Speed Read (0BH), Fast-Read Dual Output (3BH), or Fast-Read Dual I/O (BBH) instructions |
| Page Size | 256 bytes - defines minimum programmable unit; partial-page writes are ignored |
| Erase Performance | Sector-Erase: 40 ms typical; Block-Erase: 80 ms typical; Chip-Erase: 250 ms typical - enables rapid field firmware updates |
| Endurance & Retention | 100,000 program/erase cycles; >20 years data retention at +85°C - validated for automotive and industrial lifecycle requirements |
| Temperature Range | −40°C to +125°C (Extended grade) - AEC-Q100 qualified for under-hood and powertrain applications |
Pinout & Package
Package: 8-contact USON (2 mm × 3 mm), RoHS-compliant, moisture-sensitive level 3 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout instruction execution; high state places device in standby (5 µA) |
| SO/SIO1 | Serial Data Output / Dual I/O Line 1 | Outputs MSB-first data during read; functions as input for odd address bits (A23, A21, …) in Dual I/O mode |
| WP# | Write Protect | Enables BPL bit lock-down; when low, prevents modification of BP0–BP2, TB, and BPL bits in status register |
| VSS | Ground | Reference return path for all digital and analog circuitry; requires low-impedance PCB connection |
| VDD | Power Supply | 2.3–3.6 V supply input; decoupling capacitor (≥100 nF) required within 5 mm of pin |
| HOLD# | Hold Control | Suspends ongoing SPI transaction without deselecting device; requires synchronous falling edge relative to SCK low |
| SCK | Serial Clock | Provides timing reference; rising edge latches input (SI/SIO0), falling edge drives output (SO/SIO1) |
| SI/SIO0 | Serial Data Input / Dual I/O Line 0 | Accepts command/address/data; functions as input for even address bits (A22, A20, …) in Dual I/O mode |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O Interface Support | Reduces instruction latency by 50% vs. standard SPI: BBH command inputs address bits at 2 bits/clock cycle and outputs data on both SIO0/SIO1 simultaneously |
| Flexible Erase Architecture | Independent 4 KByte sector and 64 KByte block erase allows selective firmware partitioning - e.g., keep bootloader intact while updating application image |
| Hardware Write Protection | HOLD# and WP# pins provide deterministic, glitch-immune suspension and lockdown - critical for fail-safe over-the-air (OTA) update sequences |
| Ultra-Low Power Modes | 3 µA power-down current enables battery-backed operation in always-on systems; 5 mA active read current supports real-time logging |
| SuperFlash Reliability | Split-gate cell design eliminates electron trapping degradation mechanisms - achieves 100K cycles without wear leveling firmware overhead |
Applications
| Automotive Instrument Cluster | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Storing calibrated gauge graphics, vehicle-specific configuration profiles, and diagnostic event logs in a CAN-connected dashboard MCU. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding startup code and runtime parameter tables; accessed via SPI at ≤25 MHz during initialization, then at 40 MHz during dynamic UI rendering. Use Value: AEC-Q100 qualification ensures operation across −40°C to +125°C ambient; 4 KByte sector erase enables independent calibration data updates without disturbing core firmware. |
Use Scenario: Holding ladder logic programs, I/O mapping definitions, and safety-critical firmware images in modular automation controllers. IC Role / Device Role / Timing Role: Primary program memory for ARM Cortex-M7-based controller; interfaces with DMA-capable SPI peripheral for zero-CPU-overhead firmware loading. Use Value: 256-byte page programming aligns with Ethernet frame payload boundaries; dual I/O mode reduces firmware download time by 42% versus standard SPI. |
| Medical Infusion Pump UI | Smart Energy Meter Bootloader |
Use Scenario: Storing human-readable drug library metadata, clinician-set alarm thresholds, and audit trail records in Class II medical devices. IC Role / Device Role / Timing Role: Secure configuration store accessed only during setup mode; WP# pin hardwired to prevent accidental overwrite during therapy delivery. Use Value: >20-year data retention guarantees integrity of regulatory-mandated logs; HOLD# pin enables safe interruption of UI refresh during emergency stop events. |
Use Scenario: Hosting encrypted bootloader code and public key certificates for secure firmware authentication in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Root-of-trust storage element verified at power-on reset; accessed via isolated SPI bus with hardware CRC checking. Use Value: Block-protection bits (BP0–BP2) permanently lock bootloader region; chip-erase is disabled unless all BP bits = 0 - preventing malicious corruption. |
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 W25Q40EWUXIE | 4 Mbit, 1.65–1.95 V core + 3.3 V I/O; Quad SPI support (QPI); no HOLD# pin | Requires dual-supply design; lacks hardware hold functionality needed for deterministic interrupt handling | Select only if system already uses 1.8 V logic and requires QPI bandwidth; not drop-in compatible due to voltage and pinout mismatch |
| Cypress S25FL004K0XMFI011 | 4 Mbit, 2.7–3.6 V; supports SFDP; includes 4-byte addressing mode; different status register layout | Higher minimum VDD excludes use in 2.3 V brownout scenarios; SFDP adds configuration flexibility but increases driver complexity | Prefer for new designs needing JEDEC-standardized configuration; verify bootloader compatibility with extended address mode before migration |
Compared with W25Q40EWUXIE and S25FL004K0XMFI011, the SST25PF040CT-40E/SN18GVAO provides guaranteed 2.3 V operation, integrated HOLD# for atomic transaction suspension, and identical pinout to legacy SST25 devices - simplifying migration from older Microchip flash families without PCB revision.
Availability
SST25PF040CT-40E/SN18GVAO is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial PLC firmware storage, medical infusion pump UIs, and smart energy meter bootloaders requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SST25PF040CT-40E/SN18GVAO 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 reliability, longevity, and automotive-grade qualification.
The SST25PF040CT-40E/SN18GVAO belongs to Microchip's Serial Flash 25 Series, designed specifically for cost-sensitive, space-constrained embedded systems requiring robust nonvolatile storage with deterministic timing and AEC-Q100 compliance.
FAQ
What is the maximum clock frequency supported by SST25PF040CT-40E/SN18GVAO during normal read operations?
The SST25PF040CT-40E/SN18GVAO supports up to 40 MHz clock frequency-but only when using High-Speed Read (0BH), Fast-Read Dual Output (3BH), or Fast-Read Dual I/O (BBH) instructions. Standard Read (03H) is limited to 25 MHz. This distinction is enforced by internal timing logic and must be observed in firmware to avoid data corruption or timeout errors during high-speed access.
Does SST25PF040CT-40E/SN18GVAO support quad SPI (QSPI) interface mode?
No, the SST25PF040CT-40E/SN18GVAO does not support quad SPI. It implements a four-wire SPI interface with dual I/O capability (SIO0/SIO1), enabling two-bit-per-clock data transfer in Fast-Read Dual Output and Fast-Read Dual I/O modes. True quad SPI requires four bidirectional I/O lines and is not implemented in this device's pinout or command set.
How is write protection implemented on SST25PF040CT-40E/SN18GVAO?
SST25PF040CT-40E/SN18GVAO implements three-tier write protection: (1) hardware via WP# pin to lock status register bits, (2) software via Block-Protection bits (BP0–BP2, TB) in the status register, and (3) instruction-level control requiring WREN before any erase/program command. All layers must be configured correctly to prevent unintended memory modification.
What package type is used for SST25PF040CT-40E/SN18GVAO?
The SST25PF040CT-40E/SN18GVAO uses an 8-contact USON (Ultra Thin Small Outline No-lead) package measuring 2 mm × 3 mm with 0.5 mm pitch. This compact, leadless package supports automated optical inspection and offers superior thermal performance compared to SOIC variants, making it ideal for space-constrained automotive and portable industrial modules.
Is SST25PF040CT-40E/SN18GVAO qualified for automotive applications?
Yes, the SST25PF040CT-40E/SN18GVAO is AEC-Q100 qualified for automotive use and rated for the Extended temperature range of −40°C to +125°C. This qualification covers stress testing for temperature cycling, humidity bias, and ESD robustness-ensuring reliable operation in engine control units, ADAS sensors, and infotainment head units.
SST25PF040CT-40E/SN18GVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
- Clock Frequency:
- 40 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SST25PF040CT-40E/SN18GVAO FAQ
1.How can I place an order for SST25PF040CT-40E/SN18GVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040CT-40E/SN18GVAO 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 SST25PF040CT-40E/SN18GVAO reliable?
The price and inventory of SST25PF040CT-40E/SN18GVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25PF040CT-40E/SN18GVAO is usually 5 days.
3.What payment methods are accepted for SST25PF040CT-40E/SN18GVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040CT-40E/SN18GVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040CT-40E/SN18GVAO?
SST25PF040CT-40E/SN18GVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040CT-40E/SN18GVAO 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 SST25PF040CT-40E/SN18GVAO?
For technical support, including SST25PF040CT-40E/SN18GVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040CT-40E/SN18GVAO requirements.
6.How does Aetrix verify that SST25PF040CT-40E/SN18GVAO is sourced from the original manufacturer or authorized distributors?
All SST25PF040CT-40E/SN18GVAO 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 SST25PF040CT-40E/SN18GVAO meets industry standards.
7.What is the process for return or replacement of SST25PF040CT-40E/SN18GVAO?
All SST25PF040CT-40E/SN18GVAO units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040CT-40E/SN18GVAO, 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 SST25PF040CT-40E/SN18GVAO part is unused and in its original packaging.
Return procedure for SST25PF040CT-40E/SN18GVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST25PF040CT-40E/SN18GVAO Tags
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