My Inquiry
My Account
Microchip Technology SST25PF040C-40I/SN
- Part No.:
- SST25PF040C-40I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25PF040C-40I/SN.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,090
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST25PF040C-40I/SN from Microchip Technology is a 4 Mbit SPI serial flash memory IC designed for embedded code storage and data logging in space-constrained industrial and automotive 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 for >20 years at +85°C.
For engineers reviewing the SST25PF040C-40I/SN datasheet, SST25PF040C-40I/SN pinout, SST25PF040C-40I/SN application, or SST25PF040C-40I/SN equivalent, this page provides verified pin functions, sector/block erase timing, dual-I/O interface behavior, AEC-Q100 qualification status, and real-world use cases in boot code storage and firmware update buffers.
Technical Context
The SST25PF040C-40I/SN implements a four-wire SPI interface compliant with Mode 0 and Mode 3 clock polarity/phasing, enabling interoperability with diverse host controllers. Its SuperFlash technology uses a split-gate cell and thick-oxide tunneling injector to achieve lower programming current and faster erase times than conventional NOR flash.
It supports three concurrent read modes - standard Read (03H, 25 MHz), High-Speed Read (0BH, 40 MHz), and dual-line Fast-Read Dual I/O (BBH, 40 MHz) - with configurable software write protection via BP0–BP2, TB, and BPL bits in a non-volatile status register.
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 - enables direct connection to 3.3 V logic rails without level-shifting |
| Max Clock Frequency | 40 MHz - supports high-throughput firmware reads and OTA update streaming |
| Erase Time (Sector) | 40 ms typical - enables rapid field firmware patching within tight system-level timing budgets |
| Page Program Time | 4 ms per 256-byte page - allows efficient small-block configuration writes without long blocking delays |
| Data Retention | >20 years at +85°C - meets long-life requirements for industrial control and automotive ECUs |
| Endurance | 100,000 program/erase cycles - supports frequent firmware updates in remote monitoring devices |
Pinout & Package
Package: 8-contact SOIC (150 mil), 8-lead surface-mount package with 1.27 mm pitch; RoHS-compliant, industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequences to prevent premature termination |
| SO/SIO1 | Serial Data Output / Dual I/O Line 1 | Outputs odd data bits (D7,D5,D3,D1) during Fast-Read Dual I/O; bidirectional in dual-mode operation |
| WP# | Write Protect | Enables lock-down of Block-Protection bits (BP0–BP2, TB, BPL) when driven low; disables status register write if 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 input; decoupling capacitor (0.1 µF) required near pin for stable read/write operation |
| HOLD# | Hold Control | Suspends ongoing SPI transfer without deselecting device; requires synchronization with SCK low state |
| SCK | Serial Clock | Timing reference for all SPI transfers; rising edge latches input (SI/SIO0), falling edge outputs data (SO/SIO1) |
| SI/SIO0 | Serial Data Input / Dual I/O Line 0 | Inputs commands/addresses/data; outputs even data bits (D6,D4,D2,D0) during Fast-Read Dual I/O |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O Read Interface | Supports BBH instruction for simultaneous address input and data output on SIO0/SIO1 - cuts read latency by ~50% vs. standard SPI |
| Flexible Erase Granularity | Independent 4 KByte sector and 64 KByte block erase - enables selective firmware module updates without full chip erase |
| Ultra-Low Standby Current | 3 µA in power-down mode - extends battery life in always-on IoT sensor nodes and telematics modules |
| Hardware Write Protection | WP# pin + BPL bit combination prevents accidental status register corruption during voltage transients or ESD events |
| AEC-Q100 Qualification | Automotive-grade reliability validated per AEC-Q100 Rev G - qualified for engine control, ADAS, and infotainment boot memory |
Applications
| Boot Code Storage | Firmware Update Buffer |
|---|---|
Use Scenario: Storing primary bootloader and secure boot images in microcontroller-based automotive ECUs. IC Role / Device Role / Timing Role: Non-volatile code execution memory mapped via XIP (execute-in-place) interface during cold start. Use Value: 40 MHz dual-I/O read speed reduces boot time by up to 35% versus legacy 25 MHz SPI flash; AEC-Q100 qualification ensures startup reliability across thermal cycles. |
Use Scenario: Holding validated firmware patches prior to atomic swap in industrial PLCs with zero-downtime update capability. IC Role / Device Role / Timing Role: Dedicated update partition with independent 4 KByte sector erase - isolates active runtime code from pending updates. Use Value: 40 ms sector erase enables sub-100 ms patch application; 100,000-cycle endurance supports 5+ years of quarterly field updates. |
| Configuration Data Logging | Secure Key Storage |
Use Scenario: Recording calibration parameters and fault history in medical diagnostic equipment with regulatory audit trails. IC Role / Device Role / Timing Role: Parameter EEPROM replacement using byte-programmable pages and software write protection. Use Value: 256-byte page programming minimizes write overhead; >20-year data retention satisfies FDA 21 CFR Part 11 long-term recordkeeping mandates. |
Use Scenario: Storing cryptographic keys and certificate roots in trusted platform modules for secure boot chain validation. IC Role / Device Role / Timing Role: Tamper-resistant non-volatile storage with hardware-enabled status register lockdown (WP# + BPL). Use Value: BPL bit prevents unauthorized modification of BP bits after key provisioning; 3.3 V single-supply simplifies isolated power domain design. |
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 | 4 Mbit, 1.65–1.95 V or 2.7–3.6 V dual supply; supports Quad SPI (QPI) and DTR modes not available on SST25PF040C-40I/SN | Higher bandwidth in QPI mode (up to 80 MHz); lacks AEC-Q100 qualification and HOLD# pin | Select when system requires quad-line interface or wider voltage tolerance; avoid where automotive qualification or hold functionality is mandatory |
| Cypress S25FL004K | 4 Mbit, 2.7–3.6 V; supports 50 MHz read, 100,000 cycles, but uses different status register layout and no Fast-Read Dual I/O (BBH) | No dual-I/O instruction; relies on standard SPI or Quad SPI; different block protection scheme (SRWD instead of BPL) | Choose for higher clock rate in standard SPI mode; verify compatibility of status register bit definitions and erase command set before migration |
Compared with Winbond W25Q40EW and Cypress S25FL004K, the SST25PF040C-40I/SN uniquely combines AEC-Q100 qualification, dedicated HOLD# functionality, and Fast-Read Dual I/O (BBH) at 40 MHz - making it optimal for automotive boot memory and industrial systems requiring deterministic suspend/resume of SPI transfers.
Availability
SST25PF040C-40I/SN is available at Aetrix Electronics and suitable for automotive ECU boot memory, industrial PLC firmware update buffers, medical device configuration logging, and secure key storage requiring stable component supply across extended product lifecycles.
Supply support for SST25PF040C-40I/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 devices, and memory solutions for industrial, automotive, and communications markets.
The SST25PF040C-40I/SN belongs to Microchip's Serial Flash 25 Series, engineered for high-reliability embedded code storage where low power, fast read access, and long data retention are critical in harsh environments.
FAQ
What is the maximum operating frequency of the SST25PF040C-40I/SN?
The SST25PF040C-40I/SN supports up to 40 MHz clock frequency in High-Speed Read (0BH) and Fast-Read Dual I/O (BBH) modes. Standard Read (03H) is rated at 25 MHz. This 40 MHz capability enables faster firmware loading and real-time data streaming in time-critical applications such as automotive boot sequences and industrial firmware updates.
Does the SST25PF040C-40I/SN support dual-line SPI operation?
Yes, the SST25PF040C-40I/SN supports dual-line operation via Fast-Read Dual-Output (3BH) and Fast-Read Dual I/O (BBH) instructions. BBH allows simultaneous address input and data output on SIO0/SIO1 pins, effectively doubling throughput compared to standard single-line SPI - a key advantage for bandwidth-sensitive embedded systems.
What packages are available for the SST25PF040C-40I/SN?
The SST25PF040C-40I/SN is offered in three RoHS-compliant packages: 8-lead SOIC (150 mil), 8-contact WDFN (5 mm × 6 mm), and 8-contact USON (2 mm × 3 mm). The -40I/SN suffix specifically denotes the 8-lead SOIC package with industrial temperature range (–40°C to +85°C).
Is the SST25PF040C-40I/SN qualified for automotive applications?
Yes, the SST25PF040C-40I/SN is AEC-Q100 qualified for automotive use. This qualification covers stress testing for temperature cycling, humidity, and electrical robustness - confirming its suitability for engine control units, body electronics, and ADAS subsystems where reliability under thermal and vibration stress is mandatory.
How does write protection work on the SST25PF040C-40I/SN?
The SST25PF040C-40I/SN implements layered write protection: hardware via WP# pin (enabling BPL bit lock-down), and software via BP0–BP2 and TB bits in the status register. When WP# is low and BPL=1, the protection bits become read-only - preventing accidental overwrite of critical firmware regions during field updates or power faults.
SST25PF040C-40I/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:
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SST25PF040C-40I/SN FAQ
1.How can I place an order for SST25PF040C-40I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040C-40I/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-40I/SN reliable?
The price and inventory of SST25PF040C-40I/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-40I/SN is usually 5 days.
3.What payment methods are accepted for SST25PF040C-40I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040C-40I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040C-40I/SN?
SST25PF040C-40I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040C-40I/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-40I/SN?
For technical support, including SST25PF040C-40I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040C-40I/SN requirements.
6.How does Aetrix verify that SST25PF040C-40I/SN is sourced from the original manufacturer or authorized distributors?
All SST25PF040C-40I/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-40I/SN meets industry standards.
7.What is the process for return or replacement of SST25PF040C-40I/SN?
All SST25PF040C-40I/SN units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040C-40I/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-40I/SN part is unused and in its original packaging.
Return procedure for SST25PF040C-40I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST25PF040C-40I/SN Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
