Infineon Technologies S29WS256P0PBAW000

Overview

S29WS256P0PBAW000 from Cypress Semiconductor is a 256 Mb (16 M x 16-bit) 1.8 V simultaneous read/write NOR Flash memory using 90 nm MirrorBit™ technology, supporting zero-latency concurrent operations across two independent banks, with 104 MHz burst read capability and 80 ns asynchronous access time - deployed in wireless baseband processors for firmware storage and real-time code execution.

For engineers reviewing the S29WS256P0PBAW000 datasheet, S29WS256P0PBAW000 pinout, S29WS256P0PBAW000 application, or S29WS256P0PBAW000 equivalent, key selection criteria include simultaneous bank operation support, 1.7–1.95 V single-supply operation, 84-ball FBGA (11.6 mm × 8 mm) packaging, CFI compliance, and hardware/software sector protection mechanisms.

Technical Context

This device implements a sixteen-bank architecture with separate address/data paths per bank, enabling true concurrent read and write without arbitration delay. It supports both synchronous burst (with CLK-driven addressing) and asynchronous modes, with RDY# handshaking for status monitoring and AVD#-controlled address latching.

The memory includes dual boot sectors (top/bottom), secured silicon sectors (128-word factory + 128-word customer), and persistent/password-based Advanced Sector Protection. Erase and program operations are suspendable/resumable, and ACC input enables accelerated factory programming at V_HH.

Key Specifications

Pinout & Package

Package: 84-ball Fine-Pitch Ball Grid Array (FBGA), 11.6 mm × 8 mm, lead-free (Pb-free) compliant, MCP-compatible footprint (VBH084).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1.8 V simultaneous read/write NOR Flash applications.

Compared with S29WS256P0PBAW000, the S29GL256S lacks secured silicon and suspend/resume, while MX29GL256F offers lower cost but forfeits simultaneous operation - making the S29WS256P optimal for systems demanding concurrent firmware execution and update integrity.

Availability

S29WS256P0PBAW000 is available at Aetrix Electronics and suitable for wireless infrastructure, automotive infotainment, industrial HMI, and medical imaging systems requiring stable component supply, long-life support, and guaranteed Pb-free compliance.

Supply support for S29WS256P0PBAW000 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 nonvolatile memory and programmable solutions for embedded, communications, and industrial markets.

The S29WS-P family targets wireless and automotive applications needing low-voltage, high-speed, secure NOR Flash with simultaneous operation - specifically engineered to replace legacy parallel NOR in bandwidth-constrained, safety-aware systems.

FAQ

What is the function of the ACC pin on S29WS256P0PBAW000?

The ACC (Acceleration) pin accepts V_HH (typically 3.0 V) to enable accelerated programming and automatically enter unlock bypass mode, reducing single-word programming time to 40 µs and write-buffer programming to 6 µs per word. At V_IL, it disables all program/erase functions. It is not used during normal operation or read cycles.

Does S29WS256P0PBAW000 support true simultaneous read and write across the entire memory array?

No - simultaneous read/write is limited to two independent banks only, enabled by the sixteen-bank architecture. Each bank operates with its own address/data path, allowing concurrent access only when operations target different banks. Cross-bank interference is prevented by internal arbitration logic documented in Section 7.8 of the datasheet.

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

WP# provides coarse-grained protection by disabling program/erase in the four outermost 16 Kword sectors (top and bottom) regardless of software protection state. Advanced Sector Protection (persistent/password) operates independently on all other sectors and remains active even when WP# is deasserted - enabling layered security for boot and application regions.

Is the 84-ball FBGA package of S29WS256P0PBAW000 compatible with standard reflow profiles?

Yes - the VBH084 package complies with IPC/JEDEC J-STD-020D moisture sensitivity level 3 and supports standard Pb-free reflow profiles (peak 260°C, 20–40 sec above 217°C). However, ultrasonic cleaning must be avoided, and board-level thermal exposure above 150°C must be strictly limited to prevent data corruption or package delamination.