Infineon Technologies S29WS256P0SBFW000

Overview

S29WS256P0SBFW000 from Cypress Semiconductor is a 256 Mb (16 M × 16-bit) 1.8 V simultaneous read/write burst-mode NOR Flash memory using 90 nm MirrorBit™ technology, supporting zero-latency concurrent operations across two independent banks, with 104 MHz synchronous burst access and hardware write protection for top/bottom sectors - deployed in wireless baseband processors and LTE/5G modem firmware storage.

For engineers reviewing the S29WS256P0SBFW000 datasheet, S29WS256P0SBFW000 pinout, S29WS256P0SBFW000 application, or S29WS256P0SBFW000 equivalent, key selection criteria include simultaneous bank operation capability, 84-ball FBGA (11.6 mm × 8 mm) package compatibility, CFI compliance, persistent/password sector protection, and 100,000-cycle endurance per sector.

Technical Context

This device implements a sixteen-bank architecture with dual boot sector configuration (four 16 Kword sectors at top and bottom), enabling independent program/erase in one bank while reading from another. It supports both asynchronous and synchronous (burst) read modes, with programmable linear burst lengths (8/16/32 words) and handshaking via RDY output.

Internal command execution follows JEDEC 42.4 standard sequences, with dedicated ACC pin for factory programming acceleration and WP# for hardware-level sector lock. The device integrates Secured Silicon Sector (128-word factory + 128-word customer region) and supports suspend/resume for program/erase operations.

Key Specifications

Pinout & Package

Package: 84-ball Fine-Pitch BGA (VBH084), 11.6 mm × 8 mm, lead-free (Pb-free), MCP-compatible footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar burst-mode NOR Flash applications.

Compared with S29WS256P0SBFW000, the S29GL256S11TFI010 trades simultaneous operation and 1.8 V simplicity for higher speed at 3 V, while MX29GL256FHT2I-90G sacrifices CFI and secure silicon for lower unit cost - making the S29WS256P0SBFW000 optimal for secure, concurrent, low-voltage wireless firmware storage.

Availability

S29WS256P0SBFW000 is available at Aetrix Electronics and suitable for wireless baseband firmware storage, LTE/5G modem code execution, and industrial edge gateway boot memory requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for S29WS256P0SBFW000 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-reliability non-volatile memory and microcontroller solutions for automotive, industrial, and communications markets.

The S29WS-P series targets wireless infrastructure and mobile SoC applications demanding low-voltage, high-concurrency flash with robust firmware protection - directly addressing LTE/5G modem and baseband processor requirements.

FAQ

What is the function of the ACC pin on S29WS256P0SBFW000?

The ACC (Acceleration) pin accepts VHH (~3.0 V) to enable accelerated factory programming mode, automatically placing the device in unlock bypass and reducing single-word programming time to 40 µs. At VIL, it disables all program/erase functions; at VIH, it operates normally. This pin is not used during standard system operation but is essential for high-throughput pre-programming in manufacturing.

Does S29WS256P0SBFW000 support true simultaneous read and write across different memory banks?

Yes - the device implements a sixteen-bank architecture with two independently accessible banks. While one bank executes program or erase, the other can perform synchronous or asynchronous reads with zero latency, verified by the "Simultaneous Read/Program or Erase" section (page 48) of the datasheet and confirmed by RDY-driven handshaking behavior.

How does hardware write protection (WP#) interact with Advanced Sector Protection?

WP# provides coarse-grained protection by disabling program/erase in the four outermost sectors (top and bottom 16 Kword regions) when pulled low. Advanced Sector Protection (persistent/password) operates independently and can protect any sector, including those outside WP# scope. Both mechanisms coexist: WP# is pin-level and always active; ASP requires software commands and offers fine-grained, reprogrammable control.

Is the 84-ball FBGA package of S29WS256P0SBFW000 compatible with standard PCB assembly processes?

Yes - the VBH084 package complies with JEDEC MO-276 standards and supports standard reflow profiles. However, Cypress specifies that ultrasonic cleaning must be avoided, and peak temperatures must not exceed 150°C for prolonged periods to prevent data corruption or solder joint damage. Reflow profile adherence and moisture sensitivity level (MSL) 3 handling are mandatory per the FBGA special handling instructions (page 6).