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Microchip Technology SST25PF040C-40E/SN
- Part No.:
- SST25PF040C-40E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25PF040C-40E/SN.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,222
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Product details
Overview
SST25PF040C-40E/SN 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, dual I/O interface, and AEC-Q100-qualified industrial temperature range (–40°C to +105°C). It delivers 100,000 program/erase cycles and >20 years data retention for firmware storage in automotive control units and industrial microcontrollers.
For engineers reviewing the SST25PF040C-40E/SN datasheet, SST25PF040C-40E/SN pinout, SST25PF040C-40E/SN application, or SST25PF040C-40E/SN equivalent, key selection considerations include SPI Mode 0/3 compatibility, 256-byte page programming, flexible 4 KB sector / 64 KB block erase, HOLD#/WP# hardware protection, and USON-8 (2×3 mm) package suitability for space-constrained PCB layouts.
Technical Context
This SPI flash uses Microchip's proprietary SuperFlash split-gate cell architecture with thick-oxide tunneling injector, enabling lower program current and faster erase times versus conventional NOR flash. Its dual I/O mode (via SIO0/SIO1 pins) supports Fast-Read Dual Output (3BH) and Fast-Read Dual I/O (BBH) instructions for doubled data throughput at 40 MHz.
The device implements a software status register with BUSY/WEL/BP/BPL bits, hardware HOLD# and WP# pins for real-time command suspension and non-volatile block protection lock-down, and supports full chip-, block-, and sector-erase with verified timing (250 ms / 80 ms / 40 ms typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte), organized as 128 × 4 KB sectors and 8 × 64 KB overlay blocks |
| Interface | SPI-compatible, supports Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) |
| Max Clock Frequency | 40 MHz for High-Speed Read, Fast-Read Dual-Output, and Fast-Read Dual I/O operations |
| Write Endurance | 100,000 program/erase cycles per sector - enables reliable firmware update logging |
| Data Retention | Greater than 20 years at +85°C - validated for long-life automotive and industrial deployments |
| Supply Voltage | 2.3 V to 3.6 V single supply - compatible with 3.3 V logic systems without level shifting |
| Active Read Current | 5 mA typical at 40 MHz - enables low-power boot code fetching in battery-backed systems |
| Standby Current | 3 µA typical in power-down mode - critical for always-on edge sensor nodes |
Pinout & Package
Package: 8-contact USON (2 mm × 3 mm), RoHS-compliant, moisture sensitivity level (MSL) 3.
| 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 Line 1 | Outputs data on falling SCK edge (standard read); carries odd-bit data (D7/D5/D3/D1) in dual I/O modes |
| WP# | Write Protect | Enables/disables 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 input; decoupling capacitor (0.1 µF) required near pin for stable high-speed operation |
| HOLD# | Hold | Suspends ongoing SPI transaction without deselecting device; allows host to service higher-priority interrupts |
| SCK | Serial Clock | Timing reference for all SPI transfers; sampled on rising edge for inputs, drives outputs on falling edge |
| SI/SIO0 | Serial Data Input / Dual I/O Line 0 | Accepts commands/addresses/data on rising SCK edge; carries even-bit data (D6/D4/D2/D0) in dual I/O modes |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide tunneling injector reduces program current and shortens erase time vs. standard NOR flash |
| Dual I/O Interface Support | Enables 40 MHz Fast-Read Dual Output (3BH) and Fast-Read Dual I/O (BBH) for 2× effective bandwidth over standard SPI |
| Hardware Write Protection | WP# pin controls non-volatile lock-down of block protection bits (BPL), preventing accidental firmware corruption |
| HOLD# Functionality | Pauses active SPI sequences without resetting internal address pointer - preserves context during interrupt latency |
| Flexible Erase Granularity | Independent 4 KB sector and 64 KB block erase allows targeted firmware patching without full chip reprogramming |
| End-of-Write Detection | Software polling of BUSY bit in status register eliminates need for fixed delay timers, improving system responsiveness |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Storing calibrated engine maps, diagnostic logs, and bootloader code in AEC-Q100-compliant ECU modules. IC Role / Device Role / Timing Role: Non-volatile firmware storage with fast 40 MHz read access for deterministic boot timing and secure OTA update staging. Use Value: AEC-Q100 qualification ensures reliability across –40°C to +105°C ambient; 100K-cycle endurance supports frequent calibration updates. |
Use Scenario: Holding ladder logic programs, configuration parameters, and firmware images in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Primary SPI flash for persistent program storage interfaced directly to ARM Cortex-M7 MCU via quad-SPI peripheral. Use Value: Dual I/O support accelerates firmware load time; hardware HOLD# enables seamless interrupt handling during runtime code execution. |
| Medical Infusion Pump Bootloader | Smart Energy Meter Secure Boot |
Use Scenario: Hosting certified bootloader and safety-critical application firmware in Class II medical devices requiring traceable firmware integrity. IC Role / Device Role / Timing Role: Trusted boot source with write-protected sectors for immutable bootloader and configurable application partition. Use Value: Software block protection (BP0–BP2 + TB) and WP#-enabled BPL lock-down prevent unauthorized firmware modification. |
Use Scenario: Storing encrypted meter firmware, cryptographic keys, and tariff tables in ANSI C12.22-compliant smart meters operating in outdoor substations. IC Role / Device Role / Timing Role: Secure, low-power flash memory supporting AES-encrypted firmware updates over HAN/LAN interfaces. Use Value: 3 µA power-down current extends battery life in backup-powered meters; >20-year data retention guarantees long-term key validity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q40EW | Same density (4 Mbit), 1.65–1.95 V / 2.7–3.6 V dual voltage; no HOLD# pin; supports Quad SPI but lacks dual I/O instruction set | Targeted at ultra-low-voltage IoT sensors; not AEC-Q100 qualified; limited hardware protection features | Select if dual-voltage operation or Quad SPI is required; avoid for automotive or safety-critical hold functionality. |
| Cypress S25FL004A | 4 Mbit, 2.7–3.6 V, supports 50 MHz reads; includes SFDP register; no dedicated HOLD# pin; different status register layout | Designed for legacy Cypress ecosystem integration; lacks AEC-Q100 qualification; no USON-8 package option | Prefer for designs already using Cypress SPI flash toolchains; verify timing compatibility with HOLD#-dependent firmware. |
Compared with W25Q40EW and S25FL004A, the SST25PF040C-40E/SN uniquely combines AEC-Q100 qualification, dedicated HOLD# and WP# pins for robust real-time control, and dual I/O instruction support - making it optimal for automotive and industrial applications demanding deterministic timing and hardware-enforced security.
Availability
SST25PF040C-40E/SN is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC firmware storage, and medical device bootloader applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SST25PF040C-40E/SN 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 components, and memory solutions, with emphasis on reliability, longevity, and embedded system integration.
The SST25PF040C-40E/SN 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 environments.
FAQ
What is the maximum clock frequency supported by SST25PF040C-40E/SN for high-speed read operations?
The SST25PF040C-40E/SN supports up to 40 MHz for High-Speed Read (0BH), Fast-Read Dual-Output (3BH), and Fast-Read Dual I/O (BBH) instructions. Standard Read (03H) is rated at 25 MHz. This 40 MHz capability enables faster boot code loading and firmware update verification in time-critical applications, and is validated across the full industrial temperature range (–40°C to +105°C) for the SST25PF040C-40E/SN.
Does SST25PF040C-40E/SN support both SPI Mode 0 and Mode 3?
Yes, the SST25PF040C-40E/SN explicitly supports both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), as confirmed in Section 4.0 of the DS20005397E datasheet. This dual-mode compatibility allows seamless integration with diverse host microcontrollers - including those with fixed SPI polarity/phase settings - without requiring external level-shifting or protocol translation for the SST25PF040C-40E/SN.
What package type is used for SST25PF040C-40E/SN, and what are its dimensions?
The SST25PF040C-40E/SN uses an 8-contact USON (Ultra Thin Small Outline No-lead) package measuring 2 mm × 3 mm with 0.5 mm pitch, as specified in Figure 2-1 and Table 2-1 of the official datasheet. This compact, RoHS-compliant package minimizes PCB footprint and thermal resistance, making it ideal for space-constrained automotive and portable industrial modules where the SST25PF040C-40E/SN is deployed.
How does the HOLD# pin function during active SPI communication in SST25PF040C-40E/SN?
The HOLD# pin in the SST25PF040C-40E/SN suspends ongoing SPI transactions without deselecting the device or resetting the internal address pointer. When HOLD# is asserted low while CE# is active and SCK is low, the device enters hold mode: SO goes high-impedance, while SI and SCK may be driven freely. This allows the host MCU to service interrupts or perform other tasks, then resume exactly where it left off - a critical feature for deterministic real-time behavior in the SST25PF040C-40E/SN.
What is the endurance and data retention specification for SST25PF040C-40E/SN?
The SST25PF040C-40E/SN guarantees 100,000 program/erase cycles per sector and greater than 20 years of data retention at +85°C, as stated in the Features section of DS20005397E. These values are measured and validated under specified test conditions and apply to the entire memory array. This endurance and retention profile makes the SST25PF040C-40E/SN suitable for applications requiring frequent firmware updates and multi-decade field deployment, such as automotive ECUs and industrial controllers.
SST25PF040C-40E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SST25PF040C-40E/SN FAQ
1.How can I place an order for SST25PF040C-40E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040C-40E/SN 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 SST25PF040C-40E/SN reliable?
The price and inventory of SST25PF040C-40E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25PF040C-40E/SN is usually 5 days.
3.What payment methods are accepted for SST25PF040C-40E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040C-40E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040C-40E/SN?
SST25PF040C-40E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040C-40E/SN 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 SST25PF040C-40E/SN?
For technical support, including SST25PF040C-40E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040C-40E/SN requirements.
6.How does Aetrix verify that SST25PF040C-40E/SN is sourced from the original manufacturer or authorized distributors?
All SST25PF040C-40E/SN 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 SST25PF040C-40E/SN meets industry standards.
7.What is the process for return or replacement of SST25PF040C-40E/SN?
All SST25PF040C-40E/SN units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040C-40E/SN, 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 SST25PF040C-40E/SN part is unused and in its original packaging.
Return procedure for SST25PF040C-40E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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