Infineon Technologies S29GL256P90TFIR23

Overview

S29GL256P90TFIR23 from Cypress Semiconductor is a 256 Mbit (32 MB), 3.0 V-only Page Flash memory IC fabricated on 90 nm MirrorBit process technology, featuring 25 ns page access time, 90 ns random access time, and uniform 64 Kword (128 KB) sector architecture with 256 sectors. It supports VersatileI/O™ control (VIO = 1.65–VCC), 32-word write buffer programming, and Secured Silicon Sector with 128-word electronic serial number for secure device identification in embedded boot code storage.

For engineers reviewing the S29GL256P90TFIR23 datasheet, S29GL256P90TFIR23 pinout, S29GL256P90TFIR23 application, or S29GL256P90TFIR23 equivalent, key selection considerations include industrial temperature range (–40°C to +85°C), TSOP-56 package compatibility, 2.7–3.6 V operating voltage, CFI compliance, and hardware-based Advanced Sector Protection with WP#/ACC acceleration input.

Technical Context

This device implements a synchronous/asynchronous hybrid interface with dedicated CE#, OE#, and WE# controls, enabling standard NOR Flash read/program/erase operations. Its VersatileI/O architecture decouples I/O voltage (VIO) from core supply (VCC), allowing interoperability with 1.8 V, 2.5 V, or 3.3 V host systems while maintaining full 3.0 V core operation.

The internal state machine executes embedded algorithms for program and sector erase, signaled via RY/BY# output and status bits. Suspend/Resume commands allow interruption of long-duration erase cycles, and Unlock Bypass mode reduces single-word programming latency by eliminating command overhead per write.

Key Specifications

Pinout & Package

Package: 56-pin Thin Small Outline Package (TSOP-II, standard pinout TSO56), 18.4 mm × 10.16 mm body, lead-free (Pb-free) construction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Page Flash memory applications.

Compared with S29GL256S90TFIR20 and MX29GL256FHI-90G, the S29GL256P90TFIR23 uniquely combines TSOP-56 mechanical compatibility, hardware-enforced secure identity, and VersatileI/O flexibility-making it optimal for legacy-compatible industrial designs requiring field-upgradeable trust anchors.

Availability

S29GL256P90TFIR23 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive instrument cluster boot code, and medical imaging system configuration requiring stable component supply across extended product lifecycles.

Supply support for S29GL256P90TFIR23 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

Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in high-performance memory, microcontrollers, and connectivity solutions for industrial, automotive, and IoT markets.

The S29GL-P series was designed specifically for embedded systems requiring robust, high-density NOR Flash with deterministic timing, hardware security, and seamless integration into legacy 16-bit parallel bus architectures.

FAQ

What is the function of the WP#/ACC pin on S29GL256P90TFIR23?

The WP#/ACC pin serves dual roles: at VIL (≤0.8 V), it protects the highest or lowest sector from accidental program/erase; at VHH (11.5–12.5 V), it accelerates programming by enabling Unlock Bypass mode, reducing per-word time to 13.5 µs. Internal pull-up ensures safe default VIH state when unconnected.

Does S29GL256P90TFIR23 support byte-wide data access?

Yes. When BYTE# is driven low, the device operates in byte mode: only DQ0–DQ7 are active, and DQ15/A-1 becomes the LSB address input (A-1). This enables 8-bit microcontroller interfacing without external data bus multiplexing, preserving full 24-bit addressing capability.

How does the Secured Silicon Sector differ from standard flash sectors?

The Secured Silicon Sector is a dedicated 128-word (256-byte) region that can be permanently locked after programming an 8-word electronic serial number. Unlike regular sectors, it cannot be erased once locked-even by chip erase-and is accessible only via specific command sequences, providing hardware-rooted device identity.

Can S29GL256P90TFIR23 operate with VIO = 1.8 V while VCC = 3.3 V?

Yes. The VersatileI/O™ architecture explicitly supports VIO = 1.65–VCC, so VIO = 1.8 V and VCC = 3.3 V is a valid configuration. This allows direct interfacing with 1.8 V FPGAs or ASICs while maintaining full 3.3 V core performance, including 90 ns random access and 25 ns page access times.