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Infineon Technologies S25FS256SDSNFI001
- Part No.:
- S25FS256SDSNFI001
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
S25FS256SDSNFI001.pdf
- Description:
- IC FLASH 256MBIT SPI/QUAD 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:239
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Product details
Overview
S25FS256SDSNFI001 from Infineon is a 256 Mb (32 MB) serial NOR flash memory IC with SPI Multi-I/O interface, 1.8 V supply, industrial temperature grade (–40°C to +85°C), and WSON 6 × 8 mm package. It supports Quad I/O, DDR Quad I/O, SFDP/CFI configuration, hardware ECC, and hybrid/uniform sector erase options for embedded boot code and firmware storage in space-constrained industrial controllers.
For engineers reviewing the S25FS256SDSNFI001 datasheet, S25FS256SDSNFI001 pinout, S25FS256SDSNFI001 application, or S25FS256SDSNFI001 equivalent, key selection criteria include 133 MHz fast read rate, 80 MBps DDR Quad I/O throughput, 100,000 program-erase cycles, OTP security array, and AEC-Q100 Grade 3 qualification for automotive infotainment boot storage.
Technical Context
This device implements SPI-MIO (Multi-Input/Output) architecture supporting standard SPI modes 0/3, dual/quad I/O, and DDR Quad I/O command sets. Its Eclipse-based MIRRORBIT™ 65-nm process enables simultaneous read-while-write via program/erase suspend-resume and internal single-bit ECC correction.
The memory map includes configurable 24-/32-bit addressing, hybrid sector layout (eight 4-KB + one 32-KB sectors plus 64-KB blocks), uniform 256-KB erase blocks, and dedicated 1024-byte OTP array with password-controlled advanced sector protection (ASP).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 256 Mbit (32 MB) - sufficient for full firmware images and secure boot code in resource-limited microcontrollers. |
| Interface | SPI Multi-I/O with DDR Quad I/O - delivers 80 MBps read bandwidth for XIP execution without external cache. |
| Erase endurance | 100,000 program-erase cycles - supports field firmware updates over 10+ years in industrial gateways. |
| Data retention | 20 years minimum at +85°C - ensures long-term reliability in unattended edge devices. |
| Supply voltage | 1.7 V to 2.0 V - compatible with low-power 1.8 V system rails and reduces active current vs. 3.3 V flash. |
| Temperature grade | Industrial (–40°C to +85°C) - validated for operation in factory automation PLCs and motor drives. |
| Package | WSON 6 × 8 mm (WNH008) - 8-pin surface-mount footprint with exposed thermal pad for thermal management in dense PCB layouts. |
Pinout & Package
Package: WSON 6 × 8 mm (WNH008), 8-pin, Pb-free, moisture-sensitive level 3, with exposed thermal pad (pin 8 connected to VSS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS#) | Chip Select | Active-low enable for SPI command latching; must be held low during multi-byte transfers. |
| 2 (DO/IO1) | Serial Output / I/O1 | Default output for standard SPI reads; bidirectional in Dual/Quad I/O modes for data multiplexing. |
| 3 (WP#/IO2) | Write Protect / I/O2 | Hardware lock for status register writes; functions as second I/O line in Quad mode. |
| 4 (VSS) | Ground | Signal and power return path; connects to exposed thermal pad for thermal dissipation. |
| 5 (VCC) | Power Supply | 1.7–2.0 V core supply; requires local 1 µF ceramic decoupling adjacent to pin. |
| 6 (SI/IO0) | Serial Input / I/O0 | Command/address/data input in standard mode; primary I/O line in all Multi-I/O configurations. |
| 7 (SCK) | Serial Clock | Edge-triggered clock up to 133 MHz SDR or 80 MHz DDR; determines maximum sustained read throughput. |
| 8 (RESET#/IO3) | Reset / I/O3 | Hardware reset input; serves as fourth I/O line in Quad mode and enables deep power-down exit. |
Key Features
| Feature | Design Value |
|---|---|
| DDR Quad I/O interface | Enables 80 MBps read bandwidth using double-data-rate on four I/O lines, eliminating need for parallel NOR in high-speed boot applications. |
| Internal hardware ECC | Single-bit error correction applied automatically during read, reducing host CPU overhead and eliminating external error-handling logic. |
| Hybrid sector architecture | Combines eight 4-KB and one 32-KB sectors at address boundaries for flexible firmware partitioning (e.g., bootloader + parameter storage + app image). |
| OTP array with ASP | 1024-byte one-time programmable region with password-protected read access and per-sector lock control for secure key storage and anti-tamper enforcement. |
| Program/erase suspend-resume | Allows background firmware update while maintaining real-time response to host interrupts, critical for deterministic industrial control loops. |
Applications
| Industrial PLC Firmware Storage | Automotive ADAS Boot Memory |
|---|---|
Use Scenario: Storing boot loader, real-time OS kernel, and safety-critical control algorithms in programmable logic controllers deployed in factory environments. IC Role / Device Role / Timing Role: Primary non-volatile firmware repository with XIP-capable Quad I/O interface enabling direct code execution from flash. Use Value: 20-year data retention and 100K erase cycles ensure reliable operation across 15+ year product lifecycles without field reprogramming failure. | Use Scenario: Hosting boot code and sensor calibration data for radar processing units operating in engine compartments with ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: AEC-Q100 Grade 3 qualified boot memory providing deterministic startup timing and ECC-protected instruction fetch. Use Value: Hardware write protection and OTP-based key storage prevent unauthorized firmware modification during vehicle service or OTA updates. |
| Medical Imaging System Configuration | Smart Energy Meter Firmware |
Use Scenario: Retaining calibration tables, user interface assets, and regulatory compliance logs in portable ultrasound devices requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Secure configuration store with SFDP-defined parameter tables enabling automatic host driver initialization. Use Value: Advanced sector protection allows independent locking of calibration data sectors while permitting field-upgradable UI assets. | Use Scenario: Storing metrology firmware, tariff schedules, and cryptographic keys in ANSI C12.22-compliant smart meters installed in outdoor utility cabinets. IC Role / Device Role / Timing Role: Low-power flash memory with 6 µA deep power-down current minimizing battery drain during grid outage monitoring. Use Value: 1.8 V operation and 0.006 mA deep power-down current extend lithium-thionyl chloride battery life beyond 15 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial NOR flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Cypress S25FS256SAGNFI010 | Same die, identical pinout and timing, but shipped in SOIC-16 package instead of WSON-8. | Requires PCB redesign for larger footprint and lacks thermal pad; unsuitable for thermally constrained modules. | Select when board layout accommodates SOIC-16 and thermal management is less critical than assembly cost. |
| Winbond W25Q256JWSIQ | 256 Mb Quad SPI flash with 3.3 V supply, no DDR mode, and no built-in ECC; requires external error handling. | Lacks AEC-Q100 qualification and industrial temperature support; not suitable for automotive or extended-life deployments. | Choose only for cost-sensitive consumer applications where 1.8 V operation and ECC are non-essential. |
Compared with S25FS256SDSNFI001, the Cypress alternative offers identical functionality in a different package, while the Winbond part trades ECC, DDR performance, and industrial qualification for lower unit cost-making it viable only in non-critical, 3.3 V systems.
Availability
S25FS256SDSNFI001 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ADAS boot memory, and medical imaging system configuration requiring stable component supply across extended product lifecycles.
Supply support for S25FS256SDSNFI001 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive MCUs, and secure memory solutions, with global R&D centers and ISO/TS 16949-certified wafer fabs.
This device belongs to the FS-S family of high-reliability SPI NOR flash memories designed specifically for mission-critical firmware storage in automotive, industrial, and medical systems demanding AEC-Q100 qualification and 20-year data retention.
FAQ
What is the maximum clock frequency supported in DDR Quad I/O mode?
The S25FS256SDSNFI001 supports DDR Quad I/O operation at up to 80 MHz clock frequency, delivering 80 MBps effective read bandwidth. This is specified in the AC characteristics section (Table 6.5) of the official Infineon datasheet Rev. *O, and requires proper impedance-controlled PCB routing and matched trace lengths for all four I/O lines.
Does this part include hardware error correction, and how is it implemented?
Yes, the device integrates hardware-based single-bit error correction code (ECC) that operates transparently during every read operation. ECC is generated and checked internally using dedicated logic; no host software intervention or additional latency is required. The feature is enabled by default and cannot be disabled, ensuring consistent data integrity across all read accesses.
Can the OTP array be used for storing cryptographic keys, and what protection mechanisms apply?
The 1024-byte OTP array supports permanent storage of cryptographic keys and is protected by Advanced Sector Protection (ASP) with optional password control for read access. Once programmed, OTP bits cannot be erased or rewritten. Password enforcement requires successful authentication before reading OTP contents, preventing unauthorized extraction during debug or field servicing.
Is the WSON 6 × 8 mm package RoHS-compliant and lead-free?
Yes, the WSON 6 × 8 mm (WNH008) package for S25FS256SDSNFI001 is fully RoHS-compliant and Pb-free, as confirmed in Section 7.2 of the Infineon datasheet. It meets JEDEC J-STD-020 moisture sensitivity level 3 requirements and is qualified for reflow soldering per IPC/JEDEC J-STD-020D.2 standards.
S25FS256SDSNFI001 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- FS-S
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 256Mbit
- Memory Organization:
- 32M x 8
- Memory Interface:
- SPI - Quad I/O, QPI
- Clock Frequency:
- 80 MHz
- Write Cycle Time - Word, Page:
- -
- Access Time:
- -
- Voltage - Supply:
- 1.7V ~ 2V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (6x8)
S25FS256SDSNFI001 FAQ
1.How can I place an order for S25FS256SDSNFI001 through Aetrix?
Please submit a Request for Quotation (RFQ) for S25FS256SDSNFI001 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 S25FS256SDSNFI001 reliable?
The price and inventory of S25FS256SDSNFI001 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S25FS256SDSNFI001 is usually 5 days.
3.What payment methods are accepted for S25FS256SDSNFI001?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S25FS256SDSNFI001 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S25FS256SDSNFI001?
S25FS256SDSNFI001 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S25FS256SDSNFI001 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 S25FS256SDSNFI001?
For technical support, including S25FS256SDSNFI001 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S25FS256SDSNFI001 requirements.
6.How does Aetrix verify that S25FS256SDSNFI001 is sourced from the original manufacturer or authorized distributors?
All S25FS256SDSNFI001 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 S25FS256SDSNFI001 meets industry standards.
7.What is the process for return or replacement of S25FS256SDSNFI001?
All S25FS256SDSNFI001 units undergo pre-shipment inspection (PSI). If there is an issue with S25FS256SDSNFI001, 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 S25FS256SDSNFI001 part is unused and in its original packaging.
Return procedure for S25FS256SDSNFI001:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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