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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Infineon Technologies S25FL129P0XNFI003

Name: S25FL129P0XNFI003
Brand: Infineon Technologies
SKU: S25FL129P0XNFI003
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S25FL129P0XNFI003

Manufacturer:: Infineon Technologies

Category:: Memory

Package:: 8-WDFN Exposed Pad

Datasheet:: S25FL129P0XNFI003.pdf

Description:: IC FLASH 128MBIT SPI/QUAD 8WSON

Quantity:: RFQ Add To RFQ list

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Inventory:3,680

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Product details

Overview

S25FL129P0XNFI003 from Cypress Semiconductor is a 128-Mbit (16 MB), 2.7–3.6 V serial NOR Flash memory with uniform 64 KB sectors and dual/quad I/O support, designed for embedded boot code storage and firmware update in industrial controllers and network edge devices. It delivers 104 MHz FAST_READ, 40 MB/s quad I/O effective data rate, 100,000 program/erase cycles per sector, and 20-year data retention.

For engineers reviewing the S25FL129P0XNFI003 datasheet, S25FL129P0XNFI003 pinout, S25FL129P0XNFI003 application, or S25FL129P0XNFI003 equivalent, key selection criteria include SPI interface timing compliance, OTP security area usage, sector protection granularity, and migration path to S25FL128S.

Technical Context

The S25FL129P0XNFI003 implements a SPI-compatible serial interface with five extended commands enabling Dual Output Read (DOR), Quad Output Read (QOR), Dual I/O Read (DIOR), Quad I/O Read (QIOR), and Quad Page Program (QPP). It supports both uniform 64 KB sectors (with 4 KB sub-sectors) and uniform 256 KB sectors, configurable via factory option.

It integrates JEDEC-standard two-byte device ID, CFI compliance for host auto-configuration, and a 128-bit + 490-byte One-Time Programmable (OTP) area for secure identification and customer-defined data. Accelerated programming requires 9 V applied to W#/ACC pin.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Density	128 Mbit (16 MB) - sufficient for full bootloader + application firmware in resource-constrained microcontrollers
Supply Voltage	2.7–3.6 V - compatible with standard 3.0 V system rails without level-shifting
Read Speed	104 MHz FAST_READ - enables sub-10 µs instruction fetch latency for real-time boot
Erase Endurance	100,000 cycles/sector - supports frequent field firmware updates over product lifetime
Data Retention	20 years - ensures long-term reliability in unattended industrial deployments
Page Size	256 bytes - aligns with typical MCU cache line and DMA buffer sizes for efficient writes
OTP Capacity	128-bit + 490-byte - provides space for unique device ID, calibration data, and secure keys

Pinout & Package

Package: 8-contact WSON (6 × 8 mm), RoHS-compliant, with exposed thermal pad (not electrically connected).

Pin/Terminal	Circuit Role	Design Meaning
CS#	Chip Select	Active-low enable; required falling edge after power-up before command acceptance
SCK	Serial Clock	Drives all timing; rising edge latches input (SI/IO0), falling edge triggers output (SO/IO1)
SI/IO0	Serial Input / I/O0	Primary data input; functions as bidirectional I/O0 in dual/quad modes
SO/IO1	Serial Output / I/O1	Primary data output; functions as bidirectional I/O1 in dual/quad modes
W#/ACC/IO2	Write Protect / Acceleration / I/O2	Enables hardware write protection or 9 V accelerated programming; acts as I/O2 in quad mode
HOLD#/IO3	Hold / I/O3	Pauses ongoing transfers without deselecting chip; acts as I/O3 in quad mode
VCC	Power Supply	2.7–3.6 V single supply; internally regulates high-voltage programming
GND	Ground	Reference for all signals and internal charge pumps

Key Features

Feature	Design Value
Dual/Quad I/O High-Performance Read	Enables 20 MB/s (dual) or 40 MB/s (quad) effective throughput-reduces boot time by >60% vs. standard SPI
Configurable Sector Architecture	Supports either 256 × 64 KB sectors (with 4 KB sub-sectors) or 64 × 256 KB sectors-flexible for legacy compatibility or large-firmware partitioning
Factory- or Customer-Programmable OTP	128-bit secure ID + 490-byte user space-enables device authentication and calibration storage without external EEPROM
Hardware Block Protection	Status register BP2–BP0 bits + W#/ACC pin-prevents accidental overwrite of boot code during field updates
Deep Power-Down Mode	3 µA typical current draw-extends battery life in always-on IoT gateways during idle periods

Applications

Industrial PLC Firmware Storage

Network Router Boot Image

Use Scenario: Storing firmware and configuration data in programmable logic controllers operating in harsh temperature environments (-40°C to +85°C).

IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic read latency under real-time OS constraints.

Use Value: 104 MHz FAST_READ and 20-year retention ensure reliable cold-start performance across 15+ year product lifecycles.

Use Scenario: Hosting primary boot image and failover firmware in enterprise-grade Layer 3 routers requiring rapid recovery after power loss.

IC Role / Device Role / Timing Role: SPI-connected NOR Flash serving as XIP-capable execution source for ARM Cortex-A series processors.

Use Value: Quad I/O mode delivers 40 MB/s effective bandwidth-cutting boot time from 800 ms to <300 ms versus legacy parallel NOR.

Medical Diagnostic Device Calibration

Smart Energy Meter Secure Identity

Use Scenario: Storing sensor calibration coefficients and regulatory audit logs in FDA-cleared portable ultrasound systems.

IC Role / Device Role / Timing Role: Trusted nonvolatile storage with OTP-based cryptographic key binding for HIPAA-compliant data integrity.

Use Value: 128-bit factory-programmable OTP + lockable 490-byte region prevents tampering while supporting field recalibration.

Use Scenario: Embedding unique device identity and tariff tables in ANSI C12.19-compliant smart electricity meters deployed in utility grids.

IC Role / Device Role / Timing Role: Secure, low-power firmware and credential store interfaced via isolated SPI bus to metrology SoC.

Use Value: Deep Power-Down (3 µA) extends battery backup life to >10 years; hardware write protection prevents unauthorized firmware modification.

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
S25FL128SAGMFI000	Successor device with same density, enhanced 133 MHz QPI mode, improved 256 KB sector erase time (100 ms vs. 150 ms), and extended -40°C to +105°C temp range	Required for new designs per Cypress migration notice; supports higher clock stability in automotive junction-box controllers	Select when designing new products or upgrading existing platforms needing extended temperature operation and faster erase
MX25L12833FZNI-10G	Macronix part with identical 128 Mbit density, 104 MHz max clock, but no OTP area and only 10,000 erase cycles	Suitable for cost-sensitive consumer electronics where firmware update frequency is low and security features are not required	Choose for price-driven applications lacking need for secure ID or high endurance; verify pinout compatibility (8-pin WSON same footprint)

Compared with S25FL129P0XNFI003, the S25FL128S offers higher performance and broader temperature support for future-proofing, while the MX25L12833F provides lower-cost operation where OTP and endurance are noncritical.

Availability

S25FL129P0XNFI003 is available at Aetrix Electronics and suitable for industrial PLCs, network edge routers, medical diagnostic instruments, and smart energy meters requiring stable component supply and long-term obsolescence management.

Supply support for S25FL129P0XNFI003 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

Cypress Semiconductor, founded in 1982 and now part of Infineon Technologies, delivers high-performance embedded solutions including PSoC, microcontrollers, analog ICs, and nonvolatile memories for automotive, industrial, and consumer applications.

The S25FL129P belongs to Cypress's Spansion-branded serial NOR Flash product line, engineered specifically for deterministic boot code execution, secure firmware storage, and robust field-upgrade capability in mission-critical systems.

FAQ

Is S25FL129P0XNFI003 still recommended for new designs?

No. Cypress explicitly states this part is "not recommended for new and current designs." The factory-recommended migration path is S25FL128S, which offers improved speed, temperature range, and erase performance. S25FL129P0XNFI003 remains supported for legacy production and repair, with full datasheet and lifecycle documentation maintained.

What is the function of the W#/ACC pin beyond write protection?

The W#/ACC pin serves three roles: hardware write protection when pulled low, acceleration input for faster programming when 9 V is applied, and I/O2 signal in Quad I/O and Quad Page Program modes. Its multi-function design eliminates need for external voltage boost circuitry while enabling flexible interface configurations.

How does the OTP area differ between factory and customer programming?

The 128-bit primary OTP region can be programmed and permanently locked either at the factory (for unique IDs) or by the customer using the OTPP command. An additional 490-byte OTP space is fully customer-programmable and lockable in separate blocks, supporting calibration data, encryption keys, or custom firmware signatures without affecting the primary ID.

Can S25FL129P0XNFI003 operate in standard SPI mode without quad/dual extensions?

Yes. It fully supports legacy SPI Mode 0 (CPOL=0, CPHA=0) with standard READ (03h) and FAST_READ (0Bh) commands. All extended instructions (DOR, QOR, DIOR, QIOR, QPP) are optional and disabled by default; no configuration change is needed to use basic SPI functionality with existing drivers.

S25FL129P0XNFI003 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: FL-P

Package/Case:: 8-WDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: FLASH

Technology:: FLASH - NOR

Memory Size:: 128Mbit

Memory Organization:: 16M x 8

Memory Interface:: SPI - Quad I/O

Clock Frequency:: 104 MHz

Write Cycle Time - Word, Page:: 5µs, 3ms

Access Time:: -

Voltage - Supply:: 2.7V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-WSON (6x8)

S25FL129P0XNFI003 FAQ

1.How can I place an order for S25FL129P0XNFI003 through Aetrix?

Please submit a Request for Quotation (RFQ) for S25FL129P0XNFI003 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 S25FL129P0XNFI003 reliable?

The price and inventory of S25FL129P0XNFI003 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S25FL129P0XNFI003 is usually 5 days.

3.What payment methods are accepted for S25FL129P0XNFI003?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S25FL129P0XNFI003 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S25FL129P0XNFI003?

S25FL129P0XNFI003 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S25FL129P0XNFI003 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 S25FL129P0XNFI003?

For technical support, including S25FL129P0XNFI003 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S25FL129P0XNFI003 requirements.

6.How does Aetrix verify that S25FL129P0XNFI003 is sourced from the original manufacturer or authorized distributors?

All S25FL129P0XNFI003 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 S25FL129P0XNFI003 meets industry standards.

7.What is the process for return or replacement of S25FL129P0XNFI003?

All S25FL129P0XNFI003 units undergo pre-shipment inspection (PSI). If there is an issue with S25FL129P0XNFI003, 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 S25FL129P0XNFI003 part is unused and in its original packaging.

Return procedure for S25FL129P0XNFI003:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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