Cypress Semiconductor Corp S26KL256SDABHB020

Overview

S26KL256SDABHB020 from Infineon Technologies is a 256 Mb (32 MB) HYPERFLASH™ synchronous NOR flash memory with HYPERBUS™ DDR interface, 1.8 V I/O, differential clock (CK/CK#), 8-bit data bus (DQ[7:0]), and RWDS read strobe. It delivers 333 MBps sustained read throughput at 166 MHz, supports 256-KB uniform sector erase, and operates across –40°C to +105°C (Industrial Plus grade) for embedded control firmware storage in automotive ADAS ECUs.

For engineers reviewing the S26KL256SDABHB020 datasheet, S26KL256SDABHB020 pinout, S26KL256SDABHB020 application, or S26KL256SDABHB020 equivalent, key selection criteria include HYPERBUS™ timing compliance (96 ns random access, 118 ns CS# to first word), ECC 1-bit correction/2-bit detection, configurable burst length (16/32/64 bytes), deep power-down current (4 µA), and AEC-Q100 Grade 2 qualification.

Technical Context

This device implements a DDR center-aligned read strobe (DCARS) architecture where command/address and data are transferred over the same 8-bit DQ bus using double-data-rate signaling referenced to CK/CK#. Read operations require initial latency of 5–16 clock cycles followed by wrapped or linear burst output aligned to RWDS transitions.

The internal control logic separates host interface management (HIC) from embedded algorithm execution (EAC), enabling autonomous program/erase sequences without host intervention. Sector protection includes volatile and non-volatile locking per 256-KB sector plus eight 4-KB parameter sectors, and a dedicated 1024-byte one-time-programmable array supports secure boot configuration.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY15B104QN-PSOC, S26KL256SDABHB020 provides 64× more density and HYPERBUS™-enabled XIP execution but requires erase-before-write; versus S26KL512SDABHB020, it offers identical performance in half the capacity-ideal for cost-sensitive designs with fixed firmware size.

Availability

S26KL256SDABHB020 is available at Aetrix Electronics and suitable for automotive ADAS ECUs, industrial PLCs, medical imaging controllers, and avionics data loggers requiring stable component supply, long-term lifecycle support, and AEC-Q100 qualified flash memory.

Supply support for S26KL256SDABHB020 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 certification to ISO/TS 16949.

This part belongs to the HYPERFLASH™ family-designed specifically for high-bandwidth, low-pin-count code storage in automotive and industrial real-time systems requiring deterministic read performance and functional safety compliance.

FAQ

What voltage levels does S26KL256SDABHB020 support for core and I/O operation?

The device operates with 1.8 V VCC/VCCQ for both core and I/O, confirmed in Table 1 of the datasheet (Rev. *Q). It is not rated for 3.0 V operation-only the S26KL256Sxxx-300 variants support 3.0 V I/O. This 1.8 V version uses differential CK/CK# and achieves 166 MHz maximum clock rate with 333 MBps throughput.

Does S26KL256SDABHB020 support execute-in-place (XIP) functionality?

Yes, it supports XIP via HYPERBUS™ DDR interface with deterministic read latency (96 ns tACC, 118 ns CS# to first word). The DCARS timing architecture and burst-oriented read protocol enable continuous instruction streaming without wait states when interfaced with compatible microcontrollers such as Infineon's AURIX™ TC3xx series.

How is ECC implemented and what error conditions does it detect?

ECC provides 1-bit correction and 2-bit detection per 512-byte sector, implemented in hardware with no host software overhead. It triggers INT# on uncorrectable errors and reports status via ID-CFI registers. ECC coverage includes main array, parameter sectors, and OTP area-verified in Section 9.1 of the datasheet.

What is the purpose of the RSTO# pin and how is its pulse width configured?

RSTO# outputs a programmable LOW pulse during power-on reset to synchronize external logic. Pulse width is set via non-volatile configuration register bits (RSTO_WIDTH[1:0]) and can be 1 ms, 10 ms, 100 ms, or 1 s. Default is 100 ms, and the setting persists across power cycles-detailed in Section 6.3 and Register Map Table 7-1.