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Microchip Technology SST25PF040CT-40V/SN18GVAO
- Part No.:
- SST25PF040CT-40V/SN18GVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25PF040CT-40V/SN18GVAO.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,215
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Product details
Overview
SST25PF040CT-40V/SN18GVAO from Microchip Technology is a 4 Mbit SPI serial flash memory IC designed for embedded code storage and data logging in space-constrained systems. It operates from a single 2.3–3.6 V supply, supports 40 MHz high-speed read via Fast-Read Dual I/O (BBH), delivers 100,000 program/erase cycles, and retains data >20 years. It is qualified to AEC-Q100 for automotive applications and offered in an 8-contact USON (2 mm × 3 mm) package.
For engineers reviewing the SST25PF040CT-40V/SN18GVAO datasheet, SST25PF040CT-40V/SN18GVAO pinout, SST25PF040CT-40V/SN18GVAO application, or SST25PF040CT-40V/SN18GVAO equivalent, key selection considerations include its dual-I/O interface timing, sector/block erase granularity (4 KB/64 KB), software/hardware write protection architecture, and industrial-plus temperature range (–40°C to +105°C).
Technical Context
This device implements a four-wire SPI-compatible interface supporting both Mode 0 and Mode 3 clock polarity/phasing, with dedicated SI/SO pins and dual-capable SIO0/SIO1 terminals for accelerated data throughput. Its SuperFlash technology uses a split-gate cell and thick-oxide tunneling injector to achieve superior endurance and lower total energy per erase/program cycle versus conventional flash.
The internal architecture includes a serial interface controller, address latches, X/Y decoders, and I/O buffers managing command decoding, status register access (BUSY, WEL, BPx, BPL bits), and dual-mode data transfer. Erase operations are uniform across 128 × 4 KB sectors or 8 × 64 KB overlay blocks, while programming occurs in 256-byte pages with end-of-write detection via BUSY-bit polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KB), organized as 128 × 4 KB sectors and 8 × 64 KB overlay blocks |
| Supply Voltage | 2.3–3.6 V - enables direct interfacing with 3.3 V logic without level shifting |
| Max Clock Frequency | 40 MHz - supports high-speed instruction execution (e.g., Fast-Read Dual I/O) |
| Endurance | 100,000 program/erase cycles - ensures long-term reliability in firmware update scenarios |
| Data Retention | >20 years at +85°C - validated retention for industrial-plus and automotive deployments |
| Erase Granularity | Uniform 4 KB sectors and 64 KB blocks - enables fine-grained firmware patching and secure region isolation |
| Page Size | 256 bytes - aligns with typical MCU cache line and bootloader write buffer sizes |
Pinout & Package
Package: 8-contact USON (2 mm × 3 mm), RoHS-compliant, moisture-sensitive level 3 (MSL3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequence; drives device into standby when high |
| SO/SIO1 | Serial Data Output / Dual I/O | Outputs MSB-first data during standard read; serves as odd-bit (D7/D5/D3/D1) output in Dual I/O mode |
| WP# | Write Protect | Enables/disables lock-down of Block-Protection bits (BP0–BP2, TB, BPL) 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 core and I/O supply; bypassing with 100 nF ceramic capacitor near pin is mandatory |
| HOLD# | Hold Control | Pauses ongoing SPI transaction without deselecting device; requires synchronization with SCK low state |
| SCK | Serial Clock | Timing reference for all SPI transfers; rising edge samples input, falling edge outputs data |
| SI/SIO0 | Serial Data Input / Dual I/O | Accepts commands, addresses, and data; serves as even-bit (D6/D4/D2/D0) output in Dual I/O mode |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O Interface Support | Enables 40 MHz read throughput using BBH instruction with simultaneous address input and data output on SIO0/SIO1 |
| Flexible Write Protection | Combines hardware WP# pin control with software-configurable BP0–BP2/TB bits for top/bottom block locking and BPL bit lockdown |
| Ultra-Low Power Modes | 3 µA typical power-down current enables battery-backed operation in always-on monitoring systems |
| Fast Erase Times | 40 ms sector-erase and 80 ms block-erase reduce firmware update latency in real-time applications |
| SuperFlash Reliability | Split-gate cell architecture delivers 100K cycles and >20-year retention without requiring wear-leveling firmware |
Applications
| Automotive Instrument Clusters | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Storing calibrated sensor lookup tables and boot firmware in digital dashboard ECUs operating across –40°C to +105°C. IC Role / Device Role / Timing Role: Non-volatile code and configuration storage with AEC-Q100 qualification and fast page-program for over-the-air updates. Use Value: Eliminates need for external voltage translators or backup batteries due to single 3.3 V supply and 3 µA power-down current. |
Use Scenario: Holding ladder logic programs and I/O mapping data in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: High-reliability firmware repository supporting frequent field updates via 4 KB sector erase granularity. Use Value: Enables deterministic 40 ms sector-erase time for rapid firmware rollback during commissioning or fault recovery. |
| Medical Diagnostic Device Boot Memory | Smart Energy Meter Data Logging |
Use Scenario: Securely storing boot images and calibration constants in portable ultrasound or ECG units requiring regulatory compliance. IC Role / Device Role / Timing Role: Code execution directly from flash (XIP-capable) with hardware/software write protection preventing unauthorized firmware modification. Use Value: Achieves >20-year data retention at elevated temperatures, satisfying IEC 62304 long-term reliability requirements. |
Use Scenario: Recording time-stamped consumption metrics and tariff schedules in utility-grade electricity meters operating unattended for 15+ years. IC Role / Device Role / Timing Role: High-endurance data logger with 100,000-cycle endurance supporting daily write cycles over full product lifetime. Use Value: Reduces system-level complexity by integrating robust flash with no external ECC or wear-leveling required. |
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 | Same density (4 Mbit), 1.8 V supply range, 133 MHz Quad SPI support, but lacks HOLD#/WP# dual-pin control | Better suited for ultra-low-voltage IoT sensors; not AEC-Q100 qualified | Select if system uses 1.8 V I/O and requires quad-mode bandwidth; avoid for automotive where HOLD# is critical for interrupt-safe updates |
| Cypress S25FL004A | 4 Mbit, 2.7–3.6 V, 50 MHz max clock, supports SFDP and 4-byte addressing, but only 50K endurance cycles | Targeted at legacy industrial designs with JEDEC-standard command set compatibility | Choose when migrating from older Spansion devices; verify endurance budget given 50% lower cycle count than SST25PF040CT-40V/SN18GVAO |
Compared with Winbond W25Q40EW and Cypress S25FL004A, the SST25PF040CT-40V/SN18GVAO provides superior automotive qualification, higher endurance, and dedicated HOLD#/WP# pins for deterministic firmware update sequencing-making it optimal for safety-critical embedded boot storage where reliability and control precision outweigh raw speed.
Availability
SST25PF040CT-40V/SN18GVAO is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial PLC firmware storage, medical diagnostic device boot memory, and smart energy meter data logging requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SST25PF040CT-40V/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 a focus on embedded control and connectivity.
The SST25PF040CT-40V/SN18GVAO belongs to Microchip's Serial Flash 25 Series, engineered specifically for cost-sensitive, space-constrained embedded systems requiring high reliability, low power, and AEC-Q100 compliance in automotive and industrial applications.
FAQ
What is the operating temperature range for SST25PF040CT-40V/SN18GVAO?
The SST25PF040CT-40V/SN18GVAO is rated for the industrial-plus temperature range of –40°C to +105°C. This specification is validated per AEC-Q100 stress testing and applies to the full functional operation of the device-including read, write, and erase operations-as confirmed in the DS20005397E datasheet revision E. The part number suffix "T" explicitly denotes this extended temperature grade.
Does SST25PF040CT-40V/SN18GVAO support Quad SPI mode?
No, the SST25PF040CT-40V/SN18GVAO does not support Quad SPI mode. It supports standard SPI (Mode 0/Mode 3), Fast-Read Dual-Output (3BH), and Fast-Read Dual I/O (BBH) instructions only. The device has two bidirectional I/O pins (SIO0/SIO1) and lacks dedicated QIO/QUAD pins or command opcodes for four-line data transfer. This is clearly stated in the "Features" and "Instructions" sections of DS20005397E.
How is write protection implemented on SST25PF040CT-40V/SN18GVAO?
SST25PF040CT-40V/SN18GVAO implements dual-layer write protection: hardware-based via the WP# pin (enabling/disabling BPL bit lockdown) and software-based via Block-Protection bits (BP0–BP2, TB) in the status register. When WP# is low and BPL = 1, the BP bits become read-only; when WP# is high, all BP bits are writable. Protection can be applied to top or bottom memory blocks in 1/8, 1/4, or 1/2 increments, as defined in Table 4-3 of DS20005397E.
What is the significance of the "-40V" suffix in SST25PF040CT-40V/SN18GVAO?
The "-40V" suffix in SST25PF040CT-40V/SN18GVAO indicates a maximum clock frequency rating of 40 MHz for high-speed read operations (e.g., Fast-Read Dual I/O). This distinguishes it from lower-speed variants like -20V (20 MHz) and confirms full support for the BBH instruction at its rated timing. The "V" denotes voltage-range compatibility (2.3–3.6 V), and the "T" confirms the industrial-plus temperature grade (–40°C to +105°C).
Can SST25PF040CT-40V/SN18GVAO be used in place of SST25VF040B?
No, SST25PF040CT-40V/SN18GVAO is not a drop-in replacement for SST25VF040B. While both are 4 Mbit SPI flash devices, they differ in voltage range (SST25VF040B: 2.7–3.6 V vs. SST25PF040CT-40V/SN18GVAO: 2.3–3.6 V), endurance (100K vs. 10K cycles), and command set compatibility (e.g., SST25VF040B lacks BBH/Dual I/O support). Pinout is identical, but electrical and functional differences require design validation before substitution.
SST25PF040CT-40V/SN18GVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- 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 ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SST25PF040CT-40V/SN18GVAO FAQ
1.How can I place an order for SST25PF040CT-40V/SN18GVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040CT-40V/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-40V/SN18GVAO reliable?
The price and inventory of SST25PF040CT-40V/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-40V/SN18GVAO is usually 5 days.
3.What payment methods are accepted for SST25PF040CT-40V/SN18GVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040CT-40V/SN18GVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040CT-40V/SN18GVAO?
SST25PF040CT-40V/SN18GVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040CT-40V/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-40V/SN18GVAO?
For technical support, including SST25PF040CT-40V/SN18GVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040CT-40V/SN18GVAO requirements.
6.How does Aetrix verify that SST25PF040CT-40V/SN18GVAO is sourced from the original manufacturer or authorized distributors?
All SST25PF040CT-40V/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-40V/SN18GVAO meets industry standards.
7.What is the process for return or replacement of SST25PF040CT-40V/SN18GVAO?
All SST25PF040CT-40V/SN18GVAO units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040CT-40V/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-40V/SN18GVAO part is unused and in its original packaging.
Return procedure for SST25PF040CT-40V/SN18GVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST25PF040CT-40V/SN18GVAO Tags
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M24C02-WMN6TP
STMicroelectronics
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