Infineon Technologies S25FS128SAGMFI101

Overview

S25FS128SAGMFI101 from Infineon is a 128 Mb (16 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 65-nm MIRRORBIT™ Eclipse architecture. It supports Quad I/O, DDR Quad I/O read up to 80 MBps, 256/512-byte page programming, and hardware ECC for single-bit error correction.

For engineers reviewing the S25FS128SAGMFI101 datasheet, S25FS128SAGMFI101 pinout, S25FS128SAGMFI101 application, or S25FS128SAGMFI101 equivalent, key selection factors include hybrid/uniform sector erase options (4 KB/64 KB/256 KB), OTP array (1024 bytes), AEC-Q100 Grade 3 qualification, SOIC-8 package, and SFDP/CFI configuration support.

Technical Context

This device implements SPI-MIO (Multi-I/O) with configurable command subsets supporting Normal, Fast, Dual I/O, Quad I/O, and DDR Quad I/O read modes - all compliant with JEDEC JESD216 SFDP and Common Flash Interface standards. It uses a dual-plane architecture enabling concurrent program/erase suspend-resume operations.

The embedded algorithm handles automatic ECC generation and correction, hybrid sector mapping (eight 4-KB + one 32-KB sectors at top/bottom), and uniform block options (64 KB or 256 KB). Block protection is managed via status register bits and advanced sector protection (ASP) with password-controlled read access.

Key Specifications

Pinout & Package

8-lead SOIC 208 mil (SOC008) package with gull-wing leads, Pb-free finish, and standard JEDEC MS-012AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S25FS128SAGMFI101, the Cypress alternative offers footprint compatibility but sacrifices DDR performance and modern configuration flexibility, while the Winbond part trades security and standardized parameter discovery for lower unit cost and simpler initialization.

Availability

S25FS128SAGMFI101 is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial PLCs, medical diagnostic imaging systems, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for S25FS128SAGMFI101 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 microcontrollers, and secure memory solutions.

The FS-S Flash family targets high-reliability embedded systems needing fast, secure, and AEC-Q100-qualified serial NOR flash for boot code, firmware, and configuration storage.

FAQ

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

The S25FS128SAGMFI101 supports DDR Quad I/O read operations at up to 80 MHz clock frequency, delivering 80 MBps effective throughput. This is specified under AC characteristics section 6.5 of the datasheet and requires proper setup of configuration registers for DDR enable and latency tuning.

Does this device support both 24-bit and 32-bit addressing?

Yes - the device supports extended addressing modes including both 24-bit (for ≤16 MB) and 32-bit (for full 128 Mb space) addressing. The addressing mode is selected via configuration register bit CR3[1], and SFDP table provides auto-detection capability for host initialization.

How is the OTP array protected after programming?

The 1024-byte OTP array is permanently locked after first write to any byte within it; subsequent writes return status errors. Protection is enforced by on-die logic - no software lock bits or fuse blowing required. Once programmed, OTP contents remain readable but not modifiable.

Can the device operate in standard SPI mode without enabling Multi-I/O features?

Yes - the device defaults to standard SPI mode (SO/SI only) on power-up. Multi-I/O functionality (Dual/Quad/DDR) must be explicitly enabled via Write Enable and Write Status Register commands. All command subsets remain backward-compatible with legacy S25FL-A/K/P/S families in standard mode.