Infineon Technologies S29GL256N90FFIR20

Overview

S29GL256N90FFIR20 from Cypress Semiconductor is a 256 Mbit (33,554,432-byte), 3.0 V single-power-supply NOR Flash memory using 110 nm MirrorBit technology, organized in 256 × 128 Kbyte sectors, with 90 ns access time, 25 ns page read time, and 100,000 erase cycles per sector - deployed in boot code storage for industrial control systems requiring deterministic nonvolatile program execution.

For engineers reviewing the S29GL256N90FFIR20 datasheet, S29GL256N90FFIR20 pinout, S29GL256N90FFIR20 application, or S29GL256N90FFIR20 equivalent, key selection criteria include JEDEC-compliant command set compatibility, VIO-controlled I/O voltage flexibility (1.65–3.6 V), Secured Silicon Sector with 128-word serial ID, and hardware reset (RESET#) support for system-level firmware recovery.

Technical Context

This device implements a parallel-interface NOR Flash architecture with separate CE#, WE#, and OE# controls, enabling true random-access reads and sector-erase reprogramming without disturbing adjacent sectors. It supports both 8-bit and 16-bit data bus operation via BYTE# input and integrates CFI (Common Flash Interface) for host auto-configuration.

Its Enhanced VersatileI/O™ (VIO) architecture decouples I/O voltage levels from VCC, allowing interoperability with 1.8 V or 3.0 V host logic while maintaining full 3.0 V core operation. Erase and program operations are initiated by JEDEC-standard command sequences and monitored via DQ7 polling, DQ6 toggling, or RY/BY# output.

Key Specifications

Pinout & Package

Package: 56-pin TSOP (Thin Small Outline Package), standard footprint compatible with legacy flash socket designs and automated PCB assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S29GL256N90FFIR20, the S29GL256S90TFIR20 offers verified lifecycle continuity and lower active power, while MX29GL256FHI-90G provides drop-in mechanical compatibility but demands firmware-level validation of security and identification features.

Availability

S29GL256N90FFIR20 is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device boot loaders, and telecom base station configuration requiring stable component supply despite end-of-life status.

Supply support for S29GL256N90FFIR20 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 global leader in embedded solutions, specializing in high-reliability memory, PSoC programmable systems, and USB connectivity ICs.

The S29GL-N family was designed for mission-critical embedded boot and configuration storage, emphasizing JEDEC compatibility, sector-level security, and robustness across industrial temperature ranges.

FAQ

Is S29GL256N90FFIR20 still recommended for new designs?

No. Cypress explicitly states this part is "Not Recommended for New Design" and designates S29GL256S90TFIR20 as the factory-recommended migration path. While fully functional and supported for existing production, new projects should adopt the S-series successor for guaranteed long-term supply and updated process benefits.

What does the 'F' in the suffix 'FFIR20' indicate?

The first 'F' denotes the 56-pin TSOP package; the second 'F' specifies the industrial temperature range (–40°C to +85°C); 'IR' indicates tape-and-reel packaging; and '20' is the standard ordering option code for this speed/package/temperature combination per Cypress's ordering guide.

Can S29GL256N90FFIR20 operate with a 1.8 V host interface?

Yes. When VIO is supplied at 1.8 V, all address, control, and data inputs interpret logic levels relative to that voltage, and outputs drive to 1.8 V levels - enabling direct connection to 1.8 V FPGAs or microcontrollers without external level shifters, while VCC remains at 3.0–3.6 V for core operation.

How is the Secured Silicon Sector programmed and locked?

It is accessed via a specific command sequence (enter secured silicon sector → program data → exit secured silicon sector). Locking is performed using a separate lock command; once locked, no further writes or erases are possible in that 128-word region - even with power cycling - ensuring permanent device identity or calibration data integrity.