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Microchip Technology SST25PF040CT-40I/SN18GVAO
- Part No.:
- SST25PF040CT-40I/SN18GVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25PF040CT-40I/SN18GVAO.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,207
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Product details
Overview
SST25PF040CT-40I/SN18GVAO from Microchip Technology is a 4 Mbit SPI serial flash memory IC with SuperFlash technology, supporting single-supply operation (2.3–3.6 V), 40 MHz high-speed read, and dual I/O interface modes. It delivers 100,000 program/erase cycles and >20 years data retention, deployed in automotive and industrial embedded systems for firmware storage and boot code execution.
For engineers reviewing the SST25PF040CT-40I/SN18GVAO datasheet, SST25PF040CT-40I/SN18GVAO pinout, SST25PF040CT-40I/SN18GVAO application, or SST25PF040CT-40I/SN18GVAO equivalent, key selection considerations include its AEC-Q100-qualified industrial-plus temperature range (–40°C to +105°C), 256-byte page programming, uniform 4 KByte sector erase, and hardware HOLD#/WP# control for robust system-level flash management.
Technical Context
This device implements a four-wire SPI-compatible interface (Mode 0 and Mode 3) with dedicated SI/SIO0 and SO/SIO1 pins enabling Fast-Read Dual-Output (3BH) and Fast-Read Dual I/O (BBH) instructions. Its SuperFlash split-gate cell architecture enables lower programming current and shorter erase times versus conventional NOR flash.
Internal operations are managed via a software status register with BUSY bit polling, Write-Enable Latch (WEL), and configurable block protection (BP0–BP2, TB, BPL) controlled by WP# and software commands. The HOLD# pin suspends active serial sequences without deselecting the device, preserving clock phase alignment during host interrupt handling.
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 |
| Supply Voltage | 2.3–3.6 V - enables direct interfacing with 3.3 V logic domains without level shifting |
| Max Clock Frequency | 40 MHz - supports high-throughput boot code loading and firmware updates |
| Page Program Time | 4 ms per 256 bytes - defines minimum latency for incremental firmware patching |
| Sector Erase Time | 40 ms per 4 KByte - determines granularity and speed of configuration data updates |
| Data Retention | >20 years at +85°C - ensures long-term reliability in unattended industrial deployments |
| Endurance | 100,000 program/erase cycles - supports frequent field-upgrade scenarios in edge devices |
Pinout & Package
Package: 8-contact USON (2 mm × 3 mm), RoHS-compliant, optimized for space-constrained PCB layouts in automotive and portable industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low selection signal; must remain low throughout command sequence to prevent premature standby entry |
| SO/SIO1 | Serial Data Output / Dual I/O | Outputs odd data bits (D7,D5,D3,D1) in Dual I/O mode; functions as standard SO in single I/O mode |
| WP# | Write Protect | Enables lock-down of Block-Protection bits (BPL); low state restricts WRSR execution when BPL = 1 |
| 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 (0.1 µF) required within 5 mm of pin |
| HOLD# | Hold Control | Pauses ongoing SPI transaction without resetting SCK phase; valid only when CE# is low |
| SCK | Serial Clock | Timing reference for all SPI transfers; rising edge latches input, falling edge drives output |
| SI/SIO0 | Serial Data Input / Dual I/O | Inputs even address/data bits in Dual I/O mode; functions as standard SI in single I/O mode |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O Interface Support | Enables BBH instruction for 2-bit-per-clock address input and simultaneous D[odd]/D[even] output, doubling effective throughput vs. standard SPI |
| Hardware Hold Function | HOLD# pin allows deterministic suspension/resumption of SPI sequences during host CPU interrupts-no clock re-synchronization needed |
| Configurable Block Protection | BP0–BP2/TB bits support eight protection levels (e.g., top/bottom 1/8, 1/4, 1/2, full array), enforced via status register and WP#-controlled lock-down |
| Ultra-Low Standby Current | 3 µA in power-down mode reduces quiescent power in battery-backed or energy-harvesting systems |
| AEC-Q100 Qualification | Automotive-grade qualification confirms reliability under thermal cycling, vibration, and extended temperature stress (–40°C to +105°C) |
Applications
| Automotive Instrument Clusters | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Storing calibrated display assets, gauge graphics, and safety-critical boot firmware in digital instrument clusters. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic <100 ms firmware load time at power-on reset. Use Value: AEC-Q100 qualification and >20-year data retention ensure compliance with ASIL-B functional safety requirements across vehicle lifetime. |
Use Scenario: Holding programmable logic controller (PLC) runtime firmware, configuration tables, and real-time I/O mapping data. IC Role / Device Role / Timing Role: Field-upgradable code storage with 4 KByte sector erase enabling modular firmware patching without full reflash. Use Value: 100,000 endurance cycles support weekly firmware updates over 19+ years of continuous operation. |
| Medical Diagnostic Device Boot Memory | Smart Energy Meter Code Storage |
Use Scenario: Securing boot loader and regulatory-certified application code in portable ultrasound and ECG analyzers. IC Role / Device Role / Timing Role: Trusted code repository with hardware write protection (WP# + BPL) preventing unauthorized firmware modification. Use Value: Dual I/O read capability (BBH) accelerates secure boot verification, reducing startup latency below 250 ms. |
Use Scenario: Storing metrology firmware, tariff tables, and communication stack binaries in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: High-reliability data archive supporting 10+ year field deployment with zero annual data loss tolerance. Use Value: 3 µA power-down current extends battery life in tamper-detection circuits during mains failure events. |
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 density, 1.8 V supply, 104 MHz Quad SPI, no HOLD# pin | Lacks hardware hold function and automotive temperature grade; suited for cost-sensitive consumer IoT | Select when ultra-low voltage operation and quad I/O bandwidth outweigh need for interrupt-safe hold capability |
| Cypress S25FL004K | 4 Mbit density, 2.7–3.6 V supply, 85 MHz Quad SPI, integrated ECC | Includes on-die error correction but no dual I/O mode; requires different command set and timing margins | Prefer for mission-critical applications requiring bit-error resilience where firmware integrity validation is mandatory |
Compared with W25Q40EW and S25FL004K, the SST25PF040CT-40I/SN18GVAO uniquely balances AEC-Q100 qualification, hardware HOLD# support for deterministic interrupt handling, and dual I/O throughput-making it optimal for automotive and industrial controllers requiring both reliability and real-time responsiveness.
Availability
SST25PF040CT-40I/SN18GVAO is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial PLCs, and medical diagnostic devices requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SST25PF040CT-40I/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 embedded control and reliability-critical applications.
The SST25PF040CT-40I/SN18GVAO belongs to Microchip's Serial Flash 25 Series, designed specifically for automotive and industrial systems demanding AEC-Q100 qualification, low-power operation, and robust SPI-based firmware storage.
FAQ
What is the operating temperature range for SST25PF040CT-40I/SN18GVAO?
The SST25PF040CT-40I/SN18GVAO is rated for the Industrial Plus temperature range of –40°C to +105°C and is AEC-Q100 qualified, making it suitable for under-hood automotive applications and high-ambient industrial environments. This specification is confirmed in the official Microchip DS20005397E datasheet, Section 1.0 Product Description.
Does SST25PF040CT-40I/SN18GVAO support Quad SPI mode?
No, the SST25PF040CT-40I/SN18GVAO does not support Quad SPI. It supports standard SPI (Mode 0/3), Fast-Read Dual-Output (3BH), and Fast-Read Dual I/O (BBH) modes only. Quad SPI functionality is absent from its instruction set and pinout-SIO0 and SIO1 are used exclusively for dual-data-path operations, not quad signaling.
How is write protection implemented on SST25PF040CT-40I/SN18GVAO?
SST25PF040CT-40I/SN18GVAO implements dual-layer write protection: hardware-based via the WP# pin (enabling BPL bit lock-down), and software-configurable via Block-Protection bits (BP0–BP2, TB) in the status register. When WP# is low and BPL = 1, the BP bits become read-only-preventing accidental or malicious reconfiguration of protected memory regions.
What package type is used for SST25PF040CT-40I/SN18GVAO?
The SST25PF040CT-40I/SN18GVAO uses an 8-contact USON package measuring 2 mm × 3 mm, as specified in Microchip's DS20005397E datasheet Figure 2-1 and Table 2-1. This ultra-compact, leadless package supports high-density PCB layouts while maintaining thermal performance for industrial and automotive use cases.
Can SST25PF040CT-40I/SN18GVAO be used in place of SST25VF040B?
No-SST25PF040CT-40I/SN18GVAO is not a drop-in replacement for SST25VF040B. While both are 4 Mbit SPI flash devices, they differ in voltage range (2.3–3.6 V vs. 2.7–3.6 V), endurance (100K vs. 10K cycles), data retention (>20 years vs. 20 years), and command set compatibility. Migration requires validation of timing, protection behavior, and erase/program algorithms.
SST25PF040CT-40I/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 ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SST25PF040CT-40I/SN18GVAO FAQ
1.How can I place an order for SST25PF040CT-40I/SN18GVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040CT-40I/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-40I/SN18GVAO reliable?
The price and inventory of SST25PF040CT-40I/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-40I/SN18GVAO is usually 5 days.
3.What payment methods are accepted for SST25PF040CT-40I/SN18GVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040CT-40I/SN18GVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040CT-40I/SN18GVAO?
SST25PF040CT-40I/SN18GVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040CT-40I/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-40I/SN18GVAO?
For technical support, including SST25PF040CT-40I/SN18GVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040CT-40I/SN18GVAO requirements.
6.How does Aetrix verify that SST25PF040CT-40I/SN18GVAO is sourced from the original manufacturer or authorized distributors?
All SST25PF040CT-40I/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-40I/SN18GVAO meets industry standards.
7.What is the process for return or replacement of SST25PF040CT-40I/SN18GVAO?
All SST25PF040CT-40I/SN18GVAO units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040CT-40I/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-40I/SN18GVAO part is unused and in its original packaging.
Return procedure for SST25PF040CT-40I/SN18GVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST25PF040CT-40I/SN18GVAO Tags
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