Infineon Technologies CY14V101QS-BK108XI

Overview

CY14V101QS-BK108XI from Cypress Semiconductor is a 1-Mbit (128K × 8) Quad SPI nvSRAM integrating SRAM and SONOS FLASH Quantum Trap nonvolatile storage in a single die. It delivers 108-MHz interface bandwidth, supports SPI/DPI/QPI modes, and enables infinite SRAM write cycles with 1M STORE endurance to nonvolatile elements. Used in industrial controllers for power-fail-safe data logging.

For engineers reviewing the CY14V101QS-BK108XI datasheet, CY14V101QS-BK108XI pinout, CY14V101QS-BK108XI application, or CY14V101QS-BK108XI equivalent, key selection criteria include AutoStore timing via VCAP, HSB-driven hardware STORE/RECALL control, QPI burst wrap read/write support, and dual-voltage I/O (VCCQ = 1.71–2.0 V) compatibility with low-power microcontrollers.

Technical Context

The CY14V101QS-BK108XI implements a hybrid memory architecture where all read/write operations target the SRAM array, while STORE/RECALL transfers data between SRAM and interleaved SONOS Quantum Trap cells. Its QPI interface supports opcode-based command execution across Single/Dual/Quad I/O modes with configurable clock polarity (CPOL=0/1) and phase (CPHA=0/1).

Power-loss resilience is achieved through three STORE mechanisms: AutoStore (triggered by VCAP discharge at power-down), Software STORE (via SPI STORE instruction), and Hardware STORE (via active-low assertion on HSB pin). RECALL occurs automatically at power-up or via software instruction, restoring full 128KB of data within 15 ms typical.

Key Specifications

Pinout & Package

Package: 16-pin SOIC (Standard Pinout per Figure 1, Document 001-85257 Rev. *M). Pin assignments validated per official Cypress pin definitions and logic block diagram.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nvSRAM applications.

Compared with FM25V01A-G and MB85RS1MT-FPN-GE1, CY14V101QS-BK108XI uniquely combines QPI bandwidth, independent I/O voltage, HSB-triggered STORE, and extended temperature support - making it optimal for deterministic, high-throughput industrial fail-safe memory.

Availability

CY14V101QS-BK108XI is available at Aetrix Electronics and suitable for industrial PLCs, medical infusion pumps, automotive ADAS recorders, and smart grid RTUs requiring stable component supply across extended temperature and long-life programs.

Supply support for CY14V101QS-BK108XI 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 memory and programmable system-on-chip solutions for industrial, automotive, and communications markets.

The CY14V series targets mission-critical data retention applications where power failure resilience, deterministic STORE/RECALL timing, and extended temperature operation are mandatory design requirements.

FAQ

What is the role of the VCAP pin and what capacitor value is recommended?

The VCAP pin supplies hold-up energy to complete AutoStore during power loss. Cypress specifies a 4.7 µF ±20% tantalum or ceramic capacitor rated ≥6.3 V, placed within 5 mm of the pin with low-ESR (<1 Ω) and low-ESL layout. Incorrect sizing or placement causes incomplete STORE and data loss.

How does the HSB pin function in both input and output modes?

HSB operates as an open-drain output indicating STORE/RECALL busy status (LOW = active). When driven LOW externally with ≥2 mA sink capability, it initiates Hardware STORE. The pin must be pulled up to VCCQ via 4.7 kΩ resistor; no external pull-down is permitted during normal operation.

Can CY14V101QS-BK108XI operate in standard SPI mode without enabling QPI or DPI?

Yes - it defaults to standard SPI mode after power-up. QPI and DPI require explicit enable instructions (QPIEN/DPIEN) and are disabled on reset. Standard SPI uses only SI, SO, WP, and SCK pins; I/O3 remains NC until QPI is activated, ensuring backward compatibility with legacy 4-wire SPI controllers.

Is the 8-byte serial number truly one-time-programmable (OTP)?

Yes - the 8-byte serial number register is OTP and permanently locked after first programming via WRSN instruction. Once written, RDSN returns the stored value and further WRSN attempts are ignored. This enables secure unit-level traceability in regulated industries without risk of overwrite in field operation.