Infineon Technologies S29GL256P90TFIR20

Overview

S29GL256P90TFIR20 from Cypress Semiconductor is a 256 Mbit (32 MB) single-voltage 3.0 V page-mode NOR Flash memory 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 factory- or customer-programmable 8-word electronic serial number. Used in industrial embedded boot code storage and firmware update storage.

For engineers reviewing the S29GL256P90TFIR20 datasheet, S29GL256P90TFIR20 pinout, S29GL256P90TFIR20 application, or S29GL256P90TFIR20 equivalent, key selection criteria include 3.0 V-only operation, TSOP-56 package compatibility, 256-sector uniform erase architecture, 100,000 erase cycles per sector, and CFI-compliant interface for system-level flash management.

Technical Context

This device implements a synchronous/asynchronous hybrid command-set architecture with hardware reset (RESET#), Ready/Busy# status signaling, and suspend/resume capability for both program and erase operations. Its VersatileI/O™ interface decouples I/O voltage (VIO) from core supply (VCC), enabling interoperability with 1.8 V, 2.5 V, or 3.3 V logic domains while maintaining 3.0 V core operation.

The 32-word write buffer enables burst programming of up to 64 bytes per command sequence, reducing effective programming time by ~75% versus single-word writes. Sector protection uses dual methods-persistent lock bits and password-based software protection-with WP#/ACC input supporting both hardware write protection and VHH-accelerated programming during production.

Key Specifications

Pinout & Package

Package: 56-pin Thin Small Outline Package (TSOP-II, standard pinout, Pb-free). Dimensions: 18.4 mm × 10.16 mm × 1.2 mm (JEDEC MO-141).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S29GL256S90TFIR20, this TSOP variant offers easier prototyping and legacy board compatibility; versus MX29GL256FHI-90G, it delivers enhanced security and voltage flexibility at modest cost premium-justified in industrial and automotive deployments requiring long-term firmware integrity.

Availability

S29GL256P90TFIR20 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive infotainment boot code, and medical diagnostic equipment BIOS requiring stable component supply across extended product lifecycles.

Supply support for S29GL256P90TFIR20 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-reliability memory, microcontrollers, and connectivity solutions for industrial, automotive, and consumer markets.

The S29GL-P series was designed specifically for embedded systems requiring deterministic boot performance, long-term data retention, and robust firmware protection-targeting applications where NOR Flash's random-access execution-in-place (XIP) capability is essential.

FAQ

What is the function of the WP#/ACC pin on S29GL256P90TFIR20?

The WP#/ACC pin serves dual roles: at VIL (≤0.4 V), it hardware-protects the top or bottom sector from program/erase; at VHH (11.5–12.5 V), it enables Accelerated Programming mode, automatically entering unlock-bypass and reducing single-word programming time from 60 µs to 13.5 µs. Internal pull-up ensures safe default VIH state when unconnected.

Does S29GL256P90TFIR20 support byte-wide data access?

Yes. When BYTE# is driven low, the device operates in byte mode: DQ0–DQ7 become active data lines, and DQ15/A-1 functions as the LSB address input (A-1). This allows 8-bit microcontroller interfacing without external data bus multiplexing, preserving pin count and simplifying PCB layout for legacy 8-bit designs.

How does the Secured Silicon Sector differ from standard sectors?

The Secured Silicon Sector is a dedicated 128-word (256-byte) region physically isolated from main array erase algorithms. It supports one-time programmable (OTP) electronic serial number (8 words) and can be permanently locked at factory or in-field using dedicated command sequences. Unlike standard sectors, it cannot be erased via standard CFI commands once locked, ensuring immutable identity or key storage.

Can S29GL256P90TFIR20 operate with VIO = 1.8 V while VCC = 3.3 V?

Yes. The VersatileI/O™ architecture explicitly supports VIO = 1.65–VCC. With VCC = 3.3 V, VIO may be set to 1.8 V, allowing direct connection to 1.8 V logic families (e.g., FPGA I/O banks or low-voltage microcontrollers) without level shifters. All address, control, and data signals conform to 1.8 V logic thresholds, while internal core remains powered at 3.3 V for optimal performance and endurance.