Infineon Technologies S29WS128N0PBAW012

Overview

S29WS128N0PBAW012 from Cypress Semiconductor (now Infineon) is a 128 Mbit (8 M x 16-bit) 1.8 V simultaneous read/write burst flash memory with 110 nm MirrorBit™ technology, 80 MHz synchronous operation, 32-word write buffer, and dual boot sector architecture. It supports zero-latency concurrent read/write across two independent banks and is used in wireless baseband processors requiring high-density, low-voltage nonvolatile storage with fast burst access.

For engineers reviewing the S29WS128N0PBAW012 datasheet, S29WS128N0PBAW012 pinout, S29WS128N0PBAW012 application, or S29WS128N0PBAW012 equivalent, key selection criteria include 1.7–1.95 V single-supply operation, 84-ball FBGA (8 mm × 11.6 mm) package compatibility, JEDEC 42.4 command set compliance, CFI support, and Advanced Sector Protection with password and persistent lock methods.

Technical Context

This device implements a sixteen-bank architecture with four 16 Kword top/bottom sectors and 126 × 64 Kword main sectors, enabling true simultaneous read/write via separate address/data paths per bank. Its RDY output signals data readiness during burst reads, and AVD# latches starting addresses on the next active CLK edge in burst mode.

The flash integrates hardware write protection (WP#), acceleration input (ACC) for factory programming, and suspend/resume commands for program/erase operations. It supports both synchronous burst and asynchronous page read modes, with programmable linear burst lengths of 8/16/32 words and wrap-around capability.

Key Specifications

Pinout & Package

84-ball Fine-Pitch Ball Grid Array (FBGA), 8 mm × 11.6 mm, lead-free compliant (VBH084 package). Balls arranged in 12×10 matrix (MD=12, ME=10), with A1 corner marked by chamfer or laser indentation. Depopulated balls include F6 (RFU on 128 Mb variant), and multiple RFU positions across rows B–L.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar burst-mode flash memory applications.

Compared with S29WS128N0PBAW012, the S29WS128P offers higher thermal robustness and guaranteed supply continuity, while the S29GL128S requires system-level voltage redesign and sacrifices concurrent operation-making the P-series the only recommended upgrade path.

Availability

S29WS128N0PBAW012 is available at Aetrix Electronics and suitable for wireless infrastructure, industrial PLC firmware, medical imaging boot memory, and avionics data loggers requiring stable component supply despite end-of-life status.

Supply support for S29WS128N0PBAW012 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-performance memory, microcontrollers, and connectivity ICs for industrial, automotive, and communications markets.

The S29WS-N family was designed specifically for wireless baseband and multimedia SoCs needing high-speed, low-voltage burst flash with simultaneous read/write capability and robust sector protection-targeting 1.8 V mobile and infrastructure platforms.

FAQ

Is S29WS128N0PBAW012 still in production?

No. Cypress discontinued the S29WS128N family in 2016 and explicitly states it is "Not Recommended for New Design." Production ceased after final lot release, and remaining stock is limited to authorized distributor channel inventory. Aetrix maintains traceable legacy supply for existing programs under controlled allocation.

What is the function of the ACC pin on S29WS128N0PBAW012?

The ACC (Acceleration) pin accepts VHH (typically 9–12 V) to enable accelerated programming, automatically placing the device in unlock bypass mode and reducing single-word programming time to 40 µs. At VIL, ACC disables all program/erase functions; it must be held at VIH during normal read operation to avoid unintended behavior.

Can S29WS128N0PBAW012 operate in purely asynchronous mode?

Yes. The device supports full asynchronous operation-including read, write, and erase-without requiring CLK or AVD# signals. In this mode, CE#, OE#, and WE# control timing per JEDEC 42.4, with tACC = 80 ns and tPACC = 20 ns. Burst functionality is disabled unless CLK is actively driven and AVD# asserted.

How does the Secured Silicon Sector work on this device?

The Secured Silicon Sector contains two 128-word regions: one factory-programmed (read-only) and one customer-programmable (one-time programmable). Access requires specific CFI query and unlock sequences. It stores immutable keys, calibration data, or cryptographic seeds, protected by hardware fuse-based write disable after programming-ensuring tamper-resistant storage of sensitive values.