Infineon Technologies S25FS128SAGBHB203

Overview

S25FS128SAGBHB203 from Infineon is a 128 Mb (16 MB) serial NOR flash memory IC with SPI Multi-I/O interface, 1.8 V supply, 65-nm MIRRORBIT™ Eclipse architecture, and industrial temperature grade (–40°C to +85°C). It supports Quad I/O read at up to 66 MBps, 256/512-byte page programming, hardware ECC, and hybrid/uniform sector erase options for embedded boot code and firmware storage.

For engineers reviewing the S25FS128SAGBHB203 datasheet, S25FS128SAGBHB203 pinout, S25FS128SAGBHB203 application, or S25FS128SAGBHB203 equivalent, key selection factors include DDR Quad I/O timing compliance, SFDP/CFI configuration support, OTP array size (1024 bytes), AEC-Q100 grade availability, and WSON-8 (6 × 5 mm) package compatibility with space-constrained industrial controllers.

Technical Context

This device implements a high-reliability SPI-MIO interface supporting all four SPI clock modes (0 and 3), extended addressing (24-/32-bit), and command subsets compatible with S25FL-P/S families. Its internal architecture includes dedicated hardware ECC logic, programmable block protection registers, and dual-sector erase suspend/resume capability.

The flash array uses hybrid sector mapping (eight 4-KB + one 32-KB sectors at top/bottom, remainder 64-KB) or uniform 64-KB/256-KB blocks. Read modes include Normal, Fast, Dual I/O, Quad I/O, DDR Quad I/O, Burst Wrap, and XIP-capable Continuous mode - all configurable via SFDP and CFI tables.

Key Specifications

Pinout & Package

Package: WSON-8 (6 × 5 mm, 0.5 mm pitch, Pb-free, moisture sensitivity level 3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FS128SAGBHB203, the Cypress alternative omits DDR capability-reducing peak bandwidth by 21%-while the Winbond part shifts ECC responsibility to firmware, increasing host CPU load and reducing reliability assurance in harsh environments.

Availability

S25FS128SAGBHB203 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ADAS boot memory, and medical imaging device configuration requiring stable component supply across extended product lifecycles.

Supply support for S25FS128SAGBHB203 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 memory solutions for industrial, automotive, and IoT applications.

The FS-S Flash family targets high-reliability embedded systems needing deterministic boot performance, long-term data integrity, and AEC-Q100 qualification - with emphasis on firmware security and seamless migration from legacy S25FL devices.

FAQ

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

The S25FS128SAGBHB203 supports DDR Quad I/O operation at up to 80 MHz clock frequency, delivering 80 MBps effective throughput. This is specified in the AC characteristics section (Table 6.5) of the datasheet and requires proper setup/hold timing for both rising and falling edges of SCK. The device automatically detects DDR mode via configuration register settings.

Does this part include hardware error correction, and how is it implemented?

Yes, the S25FS128SAGBHB203 integrates dedicated hardware ECC logic that performs single-bit error correction on every read operation without CPU intervention. ECC is applied automatically to all array reads and does not require separate enable commands or additional latency. The correction occurs transparently within the read pipeline before data is presented on IO lines.

Can the OTP array be programmed multiple times, or is it truly one-time programmable?

The 1024-byte OTP array is strictly one-time programmable: each bit can be changed from '1' to '0' only once, and no mechanism exists to reset or reprogram bits after initial programming. Programming is performed via standard SPI commands (0x42/0x4B), and verification is done through dedicated read-back commands. Once locked, OTP contents remain immutable across power cycles and temperature extremes.

Is the WSON-8 package of this device compatible with reflow soldering per J-STD-020?

Yes, the WSON-8 (6 × 5 mm) package of S25FS128SAGBHB203 is qualified for standard lead-free reflow per J-STD-020D, with a peak temperature of 260°C and 60-second duration above 220°C. The device's moisture sensitivity level is rated at MSL-3, requiring bake-out if exposed to ambient conditions beyond floor life - details are provided in Section 7.2 of the official Infineon datasheet.