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Microchip Technology SST25PF040CT-40E/NP18GVAO
- Part No.:
- SST25PF040CT-40E/NP18GVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
SST25PF040CT-40E/NP18GVAO.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8USON
- Quantity:
- Payment:
- Shipping:
Inventory:4,331
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Product details
Overview
SST25PF040CT-40E/NP18GVAO from Microchip Technology is a 4 Mbit SPI serial flash memory IC designed for embedded firmware storage and code execution 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 256-byte page programming, and features AEC-Q100-qualified industrial-plus temperature range (–40°C to +105°C).
For engineers reviewing the SST25PF040CT-40E/NP18GVAO datasheet, SST25PF040CT-40E/NP18GVAO pinout, SST25PF040CT-40E/NP18GVAO application, or SST25PF040CT-40E/NP18GVAO equivalent, this page provides verified pin functions, dual-I/O timing behavior, sector/block erase granularity, SuperFlash reliability metrics, and automotive-grade thermal validation - all confirmed against DS20005397E.
Technical Context
This device implements a four-wire SPI interface compliant with Mode 0 and Mode 3 clock polarity/phase configurations. Its SuperFlash technology uses split-gate cells and thick-oxide tunneling injectors to achieve 100,000 program/erase cycles and >20-year data retention without requiring high-voltage assist circuits.
It supports three concurrent read modes: standard Read (03H, up to 25 MHz), High-Speed Read (0BH, up to 40 MHz with dummy byte), and dual-line Fast-Read variants (3BH and BBH) that double throughput by using SIO0/SIO1 for simultaneous data/address transfer - all while maintaining full software write protection via BP0–BP2, TB, and BPL bits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte), organized as 128 × 4 KByte uniform sectors and 8 × 64 KByte overlay blocks |
| Supply Voltage | 2.3–3.6 V single supply - enables direct interfacing with 3.3 V logic without level shifters |
| Max Clock Frequency | 40 MHz - achieved only with High-Speed Read (0BH) or Fast-Read Dual I/O (BBH) instructions |
| Page Size | 256 bytes - defines minimum programmable unit; partial-page writes are ignored |
| Erase Granularity | 4 KByte sector or 64 KByte block - allows selective firmware updates without full chip erase |
| Endurance & Retention | 100,000 program/erase cycles; >20 years data retention at +85°C - validated for automotive ECU logging |
| Standby Current | 3 µA in power-down mode - critical for battery-backed IoT sensor nodes |
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 selection signal; must remain low throughout command sequence; drives device into standby when high |
| SO/SIO1 | Serial Data Output / Dual I/O Line 1 | Outputs MSB-first data during standard reads; carries odd-address bits (A23,A21,...) and odd-data bits (D7,D5,...) in Dual I/O mode |
| WP# | Write Protect | Enables BPL bit lock-down; when low, prevents modification of BP0–BP2, TB, and BPL unless BPL = 0 |
| VSS | Ground | Reference return path for all I/O and core circuitry; requires low-impedance PCB connection |
| VDD | Power Supply | 2.3–3.6 V input; decoupling capacitor (≥100 nF) required within 5 mm of pin per layout guidelines |
| HOLD# | Hold Control | Pauses ongoing SPI transaction without deselecting device; valid only when CE# is low and SCK is low |
| SCK | Serial Clock | Timing reference for all transfers; rising edge latches SI/SIO0 input; falling edge outputs SO/SIO1 data |
| SI/SIO0 | Serial Data Input / Dual I/O Line 0 | Accepts commands/addresses/data in standard mode; carries even-address bits (A22,A20,...) and even-data bits (D6,D4,...) in Dual I/O mode |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O Interface Support | Enables 40 MHz read throughput using SIO0/SIO1 bidirectional lines - reduces instruction latency by 50% vs. standard SPI |
| Flexible Block Protection | Configurable top/bottom memory locking via BP0–BP2 and TB bits - prevents accidental overwrite of bootloader or calibration data |
| Ultra-Low Power Modes | 3 µA power-down current and 5 µA standby - extends battery life in always-on edge devices |
| SuperFlash Reliability | Split-gate cell architecture eliminates charge-trapping degradation - ensures stable operation after 100k cycles in automotive environments |
| End-of-Write Detection | BUSY bit polling in status register replaces fixed-timing delays - simplifies firmware integration and improves system responsiveness |
Applications
| Automotive Instrument Clusters | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Storing calibrated display assets and real-time gauge firmware in digital dashboards subject to –40°C to +105°C thermal cycling. IC Role / Device Role / Timing Role: Nonvolatile code storage with AEC-Q100 qualification; executes XIP (execute-in-place) from high-speed dual-I/O reads. Use Value: Eliminates external SRAM buffering; 40 MHz dual-I/O read sustains 10 MB/s effective bandwidth for seamless UI rendering. |
Use Scenario: Holding field-upgradable ladder logic and I/O configuration tables in DIN-rail mounted controllers deployed in factory automation. IC Role / Device Role / Timing Role: Secure firmware repository with hardware/software write protection; supports over-the-air updates via sector-erase isolation. Use Value: 4 KByte sector erase enables patch-level updates without disrupting active control loops or losing process history. |
| Medical Diagnostic Imaging Bootloader | Smart Energy Meter Calibration Data |
Use Scenario: Hosting certified bootloader and cryptographic keys in portable ultrasound units requiring long-term data integrity under intermittent power. IC Role / Device Role / Timing Role: Trusted boot source with >20-year data retention; leverages WP#/HOLD# for secure update sequencing. Use Value: BPL-enabled lockdown prevents tampering with security-critical registers during field service operations. |
Use Scenario: Storing metrology calibration coefficients and tariff tables in ANSI C12.22-compliant electricity meters operating continuously for 15+ years. IC Role / Device Role / Timing Role: High-reliability parameter store; uses 64 KByte block erase to refresh time-of-use schedules without affecting metering accuracy. Use Value: 100,000-cycle endurance exceeds IEC 62056-21 lifetime requirements for utility-grade metering. |
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 min supply, 133 MHz Quad SPI support, no HOLD# pin | Lacks HOLD# and WP# hardware controls; relies on software protection only | Select when quad-I/O bandwidth >40 MHz is required and hold functionality is managed externally |
| Cypress S25FL004A | 4 Mbit, 2.7–3.6 V, 50 MHz max clock, supports SFDP but no dual-I/O mode | No Fast-Read Dual I/O (BBH) instruction; slower effective read throughput than SST25PF040C | Choose for legacy designs already using Cypress SPI flash toolchains and where 40 MHz dual-I/O is not needed |
Compared with W25Q40EW and S25FL004A, SST25PF040CT-40E/NP18GVAO uniquely combines AEC-Q100 qualification, hardware HOLD#/WP# pins, and 40 MHz dual-I/O throughput - making it optimal for automotive and industrial systems requiring deterministic timing and robust physical write control.
Availability
SST25PF040CT-40E/NP18GVAO is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial PLC firmware storage, medical diagnostic imaging bootloaders, and smart energy meter calibration data requiring stable component supply across extended temperature ranges.
Supply support for SST25PF040CT-40E/NP18GVAO 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 U.S.-based semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions for industrial, automotive, and communications markets.
The SST25PF040CT-40E/NP18GVAO belongs to Microchip's Serial Flash 25 Series, engineered specifically for cost-sensitive, space-constrained embedded systems needing reliable code storage with AEC-Q100 compliance and low-power operation.
FAQ
What is the maximum clock frequency supported by SST25PF040CT-40E/NP18GVAO during read operations?
The SST25PF040CT-40E/NP18GVAO supports up to 40 MHz during High-Speed Read (0BH) and Fast-Read Dual I/O (BBH) operations. Standard Read (03H) is limited to 25 MHz. This 40 MHz capability is enabled by the dual-line interface and verified in DS20005397E, Figure 5-2 and Figure 5-4 waveforms. The SST25PF040CT-40E/NP18GVAO achieves this speed without requiring external voltage boosters or timing margin adjustments.
Does SST25PF040CT-40E/NP18GVAO support hardware write protection via pins?
Yes, SST25PF040CT-40E/NP18GVAO provides two dedicated hardware write-protection pins: WP# enables lock-down of the Block-Protection-Lock (BPL) bit in the status register, and HOLD# suspends ongoing SPI transactions without deselecting the device. Both functions are electrically defined in Table 2-1 and validated in Figures 4-1 and 4-2 of DS20005397E. The SST25PF040CT-40E/NP18GVAO requires no firmware intervention to activate these protections.
What erase granularities does SST25PF040CT-40E/NP18GVAO offer, and how are they implemented?
The SST25PF040CT-40E/NP18GVAO supports three erase types: Chip-Erase (60H/C7H), 64 KByte Block-Erase (D8H), and 4 KByte Sector-Erase (20H/D7H). Each is executed via discrete SPI opcodes with specific address-bit requirements - e.g., Sector-Erase uses AMS-A12 bits to select sector address. All erase times are specified in DS20005397E: typical values are 250 ms (chip), 80 ms (block), and 40 ms (sector). The SST25PF040CT-40E/NP18GVAO implements these in hardware without host CPU overhead.
Is SST25PF040CT-40E/NP18GVAO qualified for automotive applications?
Yes, SST25PF040CT-40E/NP18GVAO is explicitly AEC-Q100 qualified for automotive use, with an industrial-plus temperature range of –40°C to +105°C. This qualification is stated in the "Features" section of DS20005397E and confirmed in the "Temperature Range" bullet. The SST25PF040CT-40E/NP18GVAO meets stress-test requirements for humidity, thermal cycling, and ESD immunity defined in AEC-Q100 Rev G, making it suitable for instrument clusters and body control modules.
How does SST25PF040CT-40E/NP18GVAO handle end-of-write detection?
The SST25PF040CT-40E/NP18GVAO uses BUSY bit (bit 0) polling in its software status register to signal ongoing Program or Erase operations. When BUSY = 1, the device is busy; when BUSY = 0, it is ready for the next command. This mechanism replaces fixed delay loops and is documented in Section 4.2.1 and Table 4-2 of DS20005397E. The SST25PF040CT-40E/NP18GVAO supports continuous status reads even during active writes, enabling deterministic firmware flow control.
SST25PF040CT-40E/NP18GVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- 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-USON (2x3)
SST25PF040CT-40E/NP18GVAO FAQ
1.How can I place an order for SST25PF040CT-40E/NP18GVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040CT-40E/NP18GVAO 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/NP18GVAO reliable?
The price and inventory of SST25PF040CT-40E/NP18GVAO 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/NP18GVAO is usually 5 days.
3.What payment methods are accepted for SST25PF040CT-40E/NP18GVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040CT-40E/NP18GVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040CT-40E/NP18GVAO?
SST25PF040CT-40E/NP18GVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040CT-40E/NP18GVAO 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/NP18GVAO?
For technical support, including SST25PF040CT-40E/NP18GVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040CT-40E/NP18GVAO requirements.
6.How does Aetrix verify that SST25PF040CT-40E/NP18GVAO is sourced from the original manufacturer or authorized distributors?
All SST25PF040CT-40E/NP18GVAO 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/NP18GVAO meets industry standards.
7.What is the process for return or replacement of SST25PF040CT-40E/NP18GVAO?
All SST25PF040CT-40E/NP18GVAO units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040CT-40E/NP18GVAO, 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/NP18GVAO part is unused and in its original packaging.
Return procedure for SST25PF040CT-40E/NP18GVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST25PF040CT-40E/NP18GVAO Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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Microchip Technology
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