Infineon Technologies S25FS128SDSMFI1D1

Overview

S25FS128SDSMFI1D1 from Infineon is a 128 Mbit (16 MB) serial NOR flash memory with SPI Multi-I/O interface, 1.8 V supply, industrial temperature grade (–40°C to +85°C), WSON 6 × 8 mm package, and integrated hardware ECC for single-bit error correction. It supports Quad I/O, DDR Quad I/O read up to 80 MBps, 100,000 program-erase cycles, and 20-year data retention - deployed in boot code storage for industrial microcontrollers.

For engineers reviewing the S25FS128SDSMFI1D1 datasheet, S25FS128SDSMFI1D1 pinout, S25FS128SDSMFI1D1 application, or S25FS128SDSMFI1D1 equivalent, key selection criteria include hybrid/uniform sector erase options, SFDP/CFI configuration support, OTP array size (1024 bytes), AEC-Q100 grade compatibility, and SPI clock mode 0/3 compliance.

Technical Context

This device implements Infineon's 65-nm MIRRORBIT™ Eclipse architecture with dual-plane memory organization and embedded algorithms for suspend/resume during program and erase operations. It supports both legacy SPI command subsets (S25FL-A/K/P/S compatible) and extended Multi-I/O protocols including QPI and DDR Quad I/O.

Configuration is managed via Status, Configuration, and Volatile Configuration Registers, with SFDP v1.6 and CFI tables enabling automatic host initialization. Security relies on hardware-controlled block protection, advanced sector protection (ASP) with password-read access, and one-time programmable (OTP) 1024-byte array.

Key Specifications

Pinout & Package

Package: WSON 6 × 8 mm (WNH008), 8-pin, Pb-free, moisture sensitivity level 3 (MSL3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial NOR flash memory applications.

Compared with S25FS128SDSMFI1D1, the Cypress alternative offers identical functionality with branding variance, while Winbond W25Q128JVSIM trades DDR performance and advanced security features for lower unit cost in non-safety-critical applications.

Availability

S25FS128SDSMFI1D1 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ADAS boot memory, and medical imaging system calibration data requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for S25FS128SDSMFI1D1 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, connectivity, and memory solutions for industrial, automotive, and IoT applications.

S25FS128SDSMFI1D1 belongs to the FS-S Flash family, designed specifically for high-reliability embedded boot and firmware storage where ECC, security, and extended temperature operation are mandatory.

FAQ

What is the maximum clock frequency supported in DDR Quad I/O mode?

The S25FS128SDSMFI1D1 supports DDR Quad I/O read operations at up to 80 MHz clock frequency, delivering 80 MBps effective throughput. This is specified under electrical conditions with VCC = 1.8 V and TA = –40°C to +85°C, and requires proper PCB layout with matched trace lengths and controlled impedance for all four I/O lines.

Does this device support software reset without using the RESET# pin?

Yes - the device supports software reset via the 0xFF command, which resets internal state machines and returns the flash to standby mode. This method avoids external pin toggling and is commonly used in systems where RESET# is shared or unavailable, though hardware reset via pin remains the recommended method for full initialization.

How is the 1024-byte OTP array organized and accessed?

The OTP array occupies address range 0x00000000–0x000003FF and is accessed exclusively via dedicated One-Time Program Array commands (0x4B, 0x42). Once programmed, bits cannot be erased or rewritten. Each byte must be written individually, and verification is performed by reading back the addressed location after programming completion.

Can hybrid sector erase be mixed with uniform sector erase in the same device?

No - hybrid and uniform sector options are mutually exclusive configurations determined at factory programming. The S25FS128SDSMFI1D1 is shipped with hybrid sector layout (eight 4-KB + one 32-KB sectors at top/bottom), and this geometry cannot be changed in-system. Uniform 64-KB sectors are available only in other part numbers like S25FS128SAGNFI101 with different ordering codes.