Infineon Technologies S26KL256SDABHI020

Overview

S26KL256SDABHI020 from Infineon is a 256 Mb (32 MB) HYPERFLASH™ NOR flash memory with HYPERBUS™ DDR interface, operating at 1.8 V I/O and supporting differential clock (CK/CK#), 8-bit DQ bus, and RWDS read strobe. It delivers 333 MBps sustained read throughput at 166 MHz, features 256-KB uniform sectors, ECC 1-bit correction/2-bit detection, and supports industrial-plus temperature range (–40°C to +105°C). It is used in high-performance boot code storage for automotive ADAS controllers.

For engineers reviewing the S26KL256SDABHI020 datasheet, S26KL256SDABHI020 pinout, S26KL256SDABHI020 application, or S26KL256SDABHI020 equivalent, key selection considerations include HYPERBUS™ timing compliance, RWDS-synchronized DDR read alignment, sector protection granularity, ECC implementation mode, and FBGA-24 thermal/power behavior under burst read and deep power-down conditions.

Technical Context

The device implements a dual-controller architecture: Host Interface Controller (HIC) manages real-time DDR signal capture and RWDS-aligned data transfer, while Embedded Algorithm Controller (EAC) executes autonomous program/erase sequences without host intervention. It uses MIRRORBIT™ floating-gate technology enabling true word-wide (16-bit) addressing on an 8-bit DDR bus.

HYPERBUS™ protocol enforces strict timing for center-aligned command/address and edge-aligned read data relative to RWDS transitions. Burst operations support configurable wrapped (16/32/64-byte) or linear modes, with automatic page prefetch during linear bursts to sustain 333 MBps throughput - requiring precise CK/CK# skew control and CS# setup/hold timing per AC spec.

Key Specifications

Pinout & Package

Package: 24-ball FBGA (VAA024), 5 mm × 5 mm × 1.0 mm, 0.8 mm ball pitch, RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed NOR flash applications.

Compared with CY15B104QN-SXIT and S26KL512SDABHI020, the S26KL256SDABHI020 balances density, bandwidth, and automotive qualification - offering optimal cost-per-MB for ADAS boot storage where 333 MBps and ECC are essential but 512 Mb is over-provisioned.

Availability

S26KL256SDABHI020 is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, industrial PLCs, 5G radio units, and medical imaging systems requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for S26KL256SDABHI020 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 ICs, and memory solutions, with global manufacturing and quality certifications including ISO/TS 16949.

This part belongs to the HYPERFLASH™ family - designed specifically for high-bandwidth, low-pin-count boot and firmware storage in safety-critical automotive and industrial systems using the standardized HYPERBUS™ interface.

FAQ

What is the purpose of the RWDS signal in S26KL256SDABHI020?

RWDS (Read Data Strobe) is a source-synchronous output that indicates valid data windows on the DQ[7:0] bus during read operations. Unlike clock signals, RWDS transitions align precisely with read data edges - enabling reliable DDR sampling even under board-level skew or jitter. It is not used during write operations and must be terminated with a 50 Ω resistor to VSS for signal integrity.

Does S26KL256SDABHI020 support both 1.8 V and 3.0 V I/O operation?

No - S26KL256SDABHI020 is a 1.8 V I/O variant only, indicated by the "D" in the suffix (per Infineon ordering guide). It requires 1.8 V VCCQ and uses differential CK/CK# signaling. The 3.0 V I/O variants (e.g., S26KL256SAxxxx) use single-ended CK and different timing specs; mixing voltage grades risks timing violation or damage.

How does the embedded algorithm controller (EAC) affect firmware update design?

The EAC autonomously executes erase and program algorithms upon command receipt - eliminating host CPU involvement during flash modification. This means firmware update routines need only issue standard commands (e.g., 0x20 for sector erase, 0x10 for buffer write), then poll INT# or status registers. No custom timing loops or voltage ramping sequences are required, simplifying bootloader development and improving update reliability.

Can S26KL256SDABHI020 be used in linear burst mode without performance penalty?

Yes - linear burst mode sustains 333 MBps throughput because the device pre-fetches the next sequential page during current-page burst output. This pipelining requires no additional host overhead and works across page boundaries. However, it increases current consumption to 80 mA during continuous burst, so thermal design must account for this versus wrapped-burst operation at lower average power.