Infineon Technologies S29GL256S90DHI023

Overview

S29GL256S90DHI023 from Infineon is a 256 Mb (32 MB) parallel NOR flash memory IC with MIRRORBIT™ Eclipse 65 nm technology, 3.0 V core supply (2.7–3.6 V), 16-bit data bus, and industrial temperature grade (–40°C to +85°C). It delivers 90 ns random access time, 15 ns page access time, and integrated hardware ECC for single-bit error correction - deployed in boot code storage for industrial PLCs and automotive ECUs requiring deterministic XIP execution.

For engineers reviewing the S29GL256S90DHI023 datasheet, S29GL256S90DHI023 pinout, S29GL256S90DHI023 application, or S29GL256S90DHI023 equivalent, key selection criteria include asynchronous 16-bit parallel interface timing, sector-level erase granularity (128 kB), OTP array support, Versatile I/O voltage range (1.65 V to VCC), and AEC-Q100 Grade 3 qualification.

Technical Context

This device implements an embedded algorithm controller (EAC) that executes autonomous program/erase operations without external microcontroller intervention. Its architecture supports page-mode reads (32-byte aligned, 15 ns subsequent access) and buffer programming of up to 512 bytes per command, reducing effective write latency versus byte-by-byte methods.

The flash uses uniform 128-kbyte sectors with Advanced Sector Protection (ASP), supporting both volatile and non-volatile lock bits per sector. Internal hardware ECC operates transparently during read cycles, correcting single-bit errors and flagging uncorrectable multi-bit failures via status register bits.

Key Specifications

Pinout & Package

Package: 56-pin TSOP (Type I, 14 mm × 20 mm, 0.55 mm pitch), compliant with JEDEC MO-141AC. Pinout validated per Infineon datasheet Rev. *U (2024-06-25), Section 12.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S29GL256P90DHI023 and MX29GL256FHT2I-90G, the S29GL256S90DHI023 uniquely combines hardware ECC, OTP security, and suspend/resume functionality - making it the only choice for ISO 26262 ASIL-B boot memory where data integrity and update robustness are mandatory.

Availability

S29GL256S90DHI023 is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, and medical imaging systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant flash memory.

Supply support for S29GL256S90DHI023 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, industrial, and security solutions, with global R&D and manufacturing infrastructure.

The GL-S family targets high-reliability embedded systems needing deterministic XIP performance, sector-level firmware update flexibility, and automotive-grade reliability - bridging the gap between traditional NOR and NAND-based code storage.

FAQ

What is the maximum operating temperature range for S29GL256S90DHI023?

The S29GL256S90DHI023 is rated for industrial temperature range: –40°C to +85°C. This grade is explicitly defined in the datasheet Rev. *U (Section "Temperature range / grade") and applies to the DHI023 suffix variant. It does not support the +105°C industrial-plus or AEC-Q100 Grade 2 variants.

Does this device support synchronous burst reads or only asynchronous operation?

S29GL256S90DHI023 supports only asynchronous read operations. The datasheet confirms all read accesses are asynchronous (page 5, "Product overview"), with no clock input or burst mode timing specifications. Page-mode reads rely on address changes-not clock edges-to trigger subsequent 15 ns accesses within the same 32-byte page.

Can the 1024-byte OTP array be used for storing cryptographic keys?

Yes - the OTP array consists of two independently lockable 512-byte regions, intended for permanent storage of security-critical data such as encryption keys, calibration constants, or device identifiers. Once locked (via dedicated unlock/lock commands), regions become permanently read-only and immune to erase or program commands.

Is hardware reset (RESET#) required before issuing commands after power-up?

Yes - the datasheet specifies a Power-On Reset (POR) sequence requiring RESET# assertion for ≥100 µs after VCC reaches 2.7 V (Section 11.3). Skipping this may result in undefined command interpretation or failed status register initialization, especially in systems lacking controlled power-rail sequencing.