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Infineon Technologies S25FS256SDSNFI000
- Part No.:
- S25FS256SDSNFI000
- Manufacturer:
- Infineon Technologies
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
S25FS256SDSNFI000.pdf
- Description:
- IC FLASH 256MBIT SPI/QUAD 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:449
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Product details
Overview
S25FS256SDSNFI000 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 read up to 80 MBps, 256-byte/512-byte page programming, and hardware ECC for single-bit error correction. Used in boot code storage for embedded microcontrollers in industrial control systems.
For engineers reviewing the S25FS256SDSNFI000 datasheet, S25FS256SDSNFI000 pinout, S25FS256SDSNFI000 application, or S25FS256SDSNFI000 equivalent, key selection criteria include SPI-MIO timing compliance, hybrid vs. uniform sector erase flexibility, OTP array size, SFDP/CFI configuration support, and AEC-Q100 grade compatibility for automotive-adjacent designs.
Technical Context
This device implements Infineon's Eclipse architecture with 65-nm MIRRORBIT™ technology, enabling high-density NOR flash with deterministic read latency and robust program/erase endurance. It supports both standard SPI (modes 0/3) and enhanced protocols including QPI mode and DDR Quad I/O for bandwidth-critical applications.
The memory array is organized with configurable sector options: hybrid (eight 4-KB + one 32-KB or 224-KB sectors at top/bottom) or uniform (64-KB or 256-KB blocks). Erase suspend/resume and program suspend/resume are supported, along with Serial Flash Discoverable Parameters (SFDP) v1.6 and Common Flash Interface (CFI) for runtime configuration discovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 256 Mbit (32 MB) - sufficient for full firmware images and parameter tables in resource-constrained MCUs |
| Supply Voltage | 1.7 V to 2.0 V - compatible with low-voltage SoC I/O domains and reduces system power consumption |
| Read Bandwidth | 80 MBps (DDR Quad I/O @ 80 MHz) - enables XIP execution of real-time code without external RAM buffering |
| Endurance | 100,000 program-erase cycles - supports field-upgradable firmware with frequent OTA updates |
| Data Retention | 20 years minimum at +85°C - ensures long-term reliability in unattended industrial deployments |
| ECC | On-die single-bit error correction - eliminates need for external ECC logic or software overhead in safety-critical boot paths |
| OTP Array | 1024 bytes - stores immutable keys, calibration data, or device-specific identifiers with permanent write protection |
Pinout & Package
Package: WSON 6 × 8 mm (WNH008), 8-pin, lead-free, moisture-sensitive level 3 (MSL3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS#) | Chip Select | Active-low enable for SPI command decoding; supports daisy-chaining in multi-device buses |
| 2 (DO / IO1) | Serial Output / I/O1 | Primary data output in standard SPI; bidirectional in Dual/Quad I/O modes |
| 3 (WP# / IO2) | Write Protect / I/O2 | Hardware lock for sector protection; repurposed as second I/O line in Quad mode |
| 4 (VSS) | Ground | Signal and power reference plane; requires low-inductance connection to minimize read noise |
| 5 (VCC) | Power Supply | 1.8 V core and I/O supply; decoupling capacitor required within 5 mm of pin |
| 6 (SI / IO0) | Serial Input / I/O0 | Command/data input in standard SPI; bidirectional in Dual/Quad I/O modes |
| 7 (SCK) | Serial Clock | Edge-triggered clock up to 133 MHz SDR or 80 MHz DDR; determines maximum throughput |
| 8 (RESET# / IO3) | Reset / I/O3 | Hardware reset assertion; repurposed as fourth I/O line in Quad mode |
Key Features
| Feature | Design Value |
|---|---|
| Hybrid Sector Architecture | Enables flexible firmware partitioning: small 4-KB sectors for configuration storage + large 224-KB sector for main image, minimizing erase time during partial updates |
| Program/Erase Suspend | Allows background erase to pause while servicing high-priority read requests - critical for real-time interrupt response in motor control firmware |
| Advanced Sector Protection (ASP) | Per-sector password-controlled read/write lock enforced by boot ROM - prevents unauthorized access to secure boot keys or calibration data |
| SFDP v1.6 Support | Enables automatic driver initialization via standardized parameter table - eliminates hard-coded timing constants in bootloader HAL layers |
Applications
| Industrial PLC Firmware Storage | Automotive ADAS Boot Memory |
|---|---|
Use Scenario: Storing firmware, configuration tables, and diagnostic logs in programmable logic controllers operating continuously in factory environments. IC Role / Device Role / Timing Role: Primary nonvolatile boot memory mapped into MCU address space for XIP execution; provides deterministic <100 µs read latency for real-time task scheduling. Use Value: 20-year data retention at +85°C ensures firmware integrity over full equipment lifecycle without refresh cycles. | Use Scenario: Holding boot code and sensor calibration data for radar processing units in Level 2+ ADAS systems. IC Role / Device Role / Timing Role: Secure boot memory with OTP-protected keys and ASP-enabled sector lockdown; supports AEC-Q100 Grade 2 (–40°C to +105°C) operation. Use Value: Hardware ECC and 100K-cycle endurance allow safe over-the-air updates without compromising ASIL-B functional safety requirements. |
| Medical Imaging System Parameter Storage | Smart Energy Meter Firmware Vault |
Use Scenario: Retaining calibration coefficients, user preferences, and regulatory audit logs in portable ultrasound devices with battery-backed operation. IC Role / Device Role / Timing Role: Low-power serial flash interfaced to ARM Cortex-M7 via Quad SPI; deep power-down current of 6 µA extends battery life between sessions. Use Value: 0.006 mA deep power-down mode reduces standby energy consumption by >95% versus legacy parallel NOR solutions. | Use Scenario: Hosting encrypted firmware and tariff tables in DIN-rail mounted smart meters deployed across wide ambient temperature ranges. IC Role / Device Role / Timing Role: Industrial-grade (–40°C to +85°C) SPI flash with block protection bits configured to prevent accidental overwrite of revenue-critical parameters. Use Value: Hardware write protection (WP# pin + status register bits) eliminates risk of field corruption during firmware update interruptions. |
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 S25FL256SAGNFI000 | Same density, 1.8 V, WSON 6×8 mm; lacks DDR Quad I/O mode and SFDP v1.6 support | No native DDR read path; limits XIP performance in bandwidth-bound applications | Select when DDR capability is unnecessary and legacy Cypress toolchain compatibility is required |
| Winbond W25Q256JWSIQ | 3.3 V supply only; 256 Mb, WSON 6×8 mm; supports QPI but no hardware ECC | Requires level-shifting for 1.8 V systems; external ECC handling increases firmware complexity | Select for cost-sensitive 3.3 V designs where ECC is managed in software or external controller |
Compared with S25FS256SDSNFI000, the Cypress alternative trades DDR bandwidth and modern configuration standards for legacy ecosystem alignment, while the Winbond part shifts voltage domain and error-handling responsibility to the host - making Infineon's device optimal for new 1.8 V, safety-aware, high-throughput embedded designs.
Availability
S25FS256SDSNFI000 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ADAS boot memory, and medical imaging system parameter storage requiring stable component supply across extended product lifecycles.
Supply support for S25FS256SDSNFI000 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, sensing, and security solutions for industrial, automotive, and IoT applications.
The FS-S Flash family targets high-reliability embedded systems needing deterministic boot performance, secure firmware storage, and long-term data integrity - with emphasis on AEC-Q100 compliance and industrial temperature resilience.
FAQ
What is the maximum clock frequency for DDR Quad I/O read operations?
The S25FS256SDSNFI000 supports DDR Quad I/O read at up to 80 MHz clock frequency, delivering 80 MBps effective bandwidth. This is specified under electrical conditions of VCC = 1.8 V and TA = –40°C to +85°C, with proper signal integrity design including controlled impedance routing and termination.
Does this device support both hybrid and uniform sector erase configurations?
Yes - the device supports two physical sector architectures: hybrid (eight 4-KB + one 224-KB sector at top/bottom) and uniform (all 256-KB sectors). Configuration is fixed at manufacturing; the WNH008 package variant uses the hybrid option with 224-KB top/bottom sector, as confirmed in Infineon's datasheet revision *O, section 8.1.
How is the 1024-byte OTP array protected from accidental writes?
The OTP array is protected by a dedicated One-Time Program Lock Bit in the Configuration Register. Once set, this bit permanently disables further writes to the OTP region. Programming requires issuing the Write Enable command followed by the Program OTP command (0x42); no hardware WP# pin assertion is needed, but the lock bit must remain unset until final programming.
Can the RESET# pin be used as a general-purpose I/O during normal operation?
No - RESET# is functionally dedicated to hardware reset initiation and cannot be repurposed as a GPIO. While it serves as IO3 in Quad I/O command sequences, this is a protocol-level multiplexing for data transfer only; the pin retains its reset functionality and must not be driven externally during active operation per datasheet section 3.8 and absolute maximum ratings.
S25FS256SDSNFI000 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- FS-S
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tray
- 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)
S25FS256SDSNFI000 FAQ
1.How can I place an order for S25FS256SDSNFI000 through Aetrix?
Please submit a Request for Quotation (RFQ) for S25FS256SDSNFI000 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 S25FS256SDSNFI000 reliable?
The price and inventory of S25FS256SDSNFI000 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S25FS256SDSNFI000 is usually 5 days.
3.What payment methods are accepted for S25FS256SDSNFI000?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S25FS256SDSNFI000 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S25FS256SDSNFI000?
S25FS256SDSNFI000 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S25FS256SDSNFI000 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 S25FS256SDSNFI000?
For technical support, including S25FS256SDSNFI000 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S25FS256SDSNFI000 requirements.
6.How does Aetrix verify that S25FS256SDSNFI000 is sourced from the original manufacturer or authorized distributors?
All S25FS256SDSNFI000 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 S25FS256SDSNFI000 meets industry standards.
7.What is the process for return or replacement of S25FS256SDSNFI000?
All S25FS256SDSNFI000 units undergo pre-shipment inspection (PSI). If there is an issue with S25FS256SDSNFI000, 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 S25FS256SDSNFI000 part is unused and in its original packaging.
Return procedure for S25FS256SDSNFI000:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
S25FS256SDSNFI000 Tags
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