Infineon Technologies S29GL256P11TFIV20

Overview

S29GL256P11TFIV20 from Cypress Semiconductor is a 256 Mbit (32 MB), 3.0 V-only page-mode NOR Flash memory fabricated on 90 nm MirrorBit process technology. It delivers 110 ns random access time and 25 ns page access time, features a 32-word/64-byte write buffer, uniform 64 Kword sectors (256 total), and supports CFI for host compatibility - deployed in industrial embedded controllers requiring reliable nonvolatile storage with fast firmware updates.

For engineers reviewing the S29GL256P11TFIV20 datasheet, S29GL256P11TFIV20 pinout, S29GL256P11TFIV20 application, or S29GL256P11TFIV20 equivalent, key selection criteria include sector erase endurance (100,000 cycles), data retention (20 years), VersatileI/O™ voltage flexibility (VIO = 1.65–VCC), hardware reset (RESET#), and WP#/ACC dual-function pin behavior under VHH acceleration.

Technical Context

This device operates as a parallel-interface NOR Flash with byte/word configuration selectable via BYTE# input, supporting both standard and page read modes. Its architecture includes an integrated command register, state controller, and embedded algorithms for program/erase with suspend/resume capability.

It implements two sector protection methods - persistent lock bits and password-based Advanced Sector Protection - and uses a dedicated Secured Silicon Sector (128-word) with factory- or customer-programmable Electronic Serial Number. The RY/BY# output provides real-time status of ongoing operations.

Key Specifications

Pinout & Package

Package: 56-pin TSOP (Standard Thin Small Outline Package, TSO56), industrial temperature range (–40°C to +85°C), Pb-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S29GL256S11TFIV20, this part offers proven 90 nm reliability over extended temperature, while MX29GL256FHT2I-90G trades feature depth for cost - making S29GL256P11TFIV20 optimal for applications needing secure identification and mixed-voltage interoperability.

Availability

S29GL256P11TFIV20 is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ECU boot code, and medical imaging system BIOS requiring stable component supply across extended product lifecycles.

Supply support for S29GL256P11TFIV20 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) designs high-performance, reliable nonvolatile memory and microcontroller solutions for industrial, automotive, and communications markets.

The S29GL-P series targets embedded systems needing deterministic NOR Flash performance, robust sector protection, and long-term data integrity - optimized for firmware storage in mission-critical control applications.

FAQ

What is the function of the WP#/ACC pin, and how does it behave under different voltage conditions?

The WP#/ACC pin serves dual roles: at VIL (≤0.8 V), it protects the highest or lowest sector from program/erase; at VHH (11.5–12.5 V), it accelerates programming and automatically enters unlock bypass mode. Internal pull-up ensures VIH default, preventing accidental writes when unconnected. This design eliminates need for external switching circuitry in production programming fixtures.

Does S29GL256P11TFIV20 support byte-wide data access, and how is it configured?

Yes - byte-wide access is enabled by driving BYTE# low, which activates DQ0–DQ7 and repurposes DQ15/A-1 as the LSB address input. In this mode, the device presents an 8-bit data bus with 24-bit addressing (16 MB capacity). Word mode (BYTE# = VIH) uses DQ0–DQ15 for 16-bit transfers. Both modes share identical command sequences and timing.

How does the Secured Silicon Sector differ from standard flash sectors, and can it be reprogrammed after locking?

The Secured Silicon Sector is a dedicated 128-word (256-byte) region with factory- or customer-programmable 8-word Electronic Serial Number. Once locked (via specific command sequence), it becomes permanently read-only - no erase or program commands affect it. Unlocking requires hardware reset and cannot be done in-system, ensuring cryptographic key or device ID immutability.

What are the timing implications of using VersatileI/O™ with VIO = 1.8 V while VCC = 3.3 V?

With VIO = 1.8 V and VCC = 3.3 V, input thresholds follow VIO (VIH ≥ 1.2 V, VIL ≤ 0.6 V), allowing direct connection to 1.8 V logic without level shifters. However, AC timing parameters (e.g., tACC, tPACC) degrade slightly - datasheet specifies 130 ns max random access under VersatileIO VIO conditions. System timing margins must account for this 20 ns penalty versus Regulated VCC mode.