Infineon Technologies CY14V101QS-BK108XQ

Overview

CY14V101QS-BK108XQ from Cypress Semiconductor is a 1-Mbit (128K × 8) Quad SPI nonvolatile SRAM integrating SRAM and SONOS FLASH Quantum Trap cells in each memory location. It delivers 108-MHz interface bandwidth, 54 MBps read/write throughput, and supports SPI/DPI/QPI modes with AutoStore/RECALL functionality. It is used in industrial control systems requiring instant power-loss data retention without battery backup.

For engineers reviewing the CY14V101QS-BK108XQ datasheet, CY14V101QS-BK108XQ pinout, CY14V101QS-BK108XQ application, or CY14V101QS-BK108XQ equivalent, key selection criteria include QPI interface speed, VCAP-supported AutoStore timing, HSB pin behavior for hardware-triggered STORE, and dual-voltage I/O (VCCQ = 1.71–2.0 V) compatibility with low-power microcontrollers.

Technical Context

The CY14V101QS-BK108XQ implements a hybrid memory architecture where all read/write operations target the SRAM array, enabling infinite endurance, while STORE/RECALL transfers data to/from the underlying SONOS nonvolatile layer. Its QPI interface supports burst wrap and XIP-capable continuous read modes with configurable clock polarity (CPOL/CPHA = 0/0 or 1/1).

STORE is initiated via three independent paths: AutoStore at power-down (using external VCAP capacitor), Software STORE via SPI instruction, or Hardware STORE by pulling HSB low. RECALL occurs automatically at power-up or via software command, ensuring deterministic data restoration before host initialization completes.

Key Specifications

Pinout & Package

Package: 16-pin SOIC (standard pinout per Figure 1, Document 001-85257 Rev. *M). Pin assignments are 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 AT25SF041B-MAHB-T, CY14V101QS-BK108XQ uniquely combines QPI bandwidth, hardware STORE triggering, and true SRAM write semantics-making it irreplaceable in deterministic, high-throughput industrial data capture.

Availability

CY14V101QS-BK108XQ is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, motor drive controllers, and medical infusion pumps requiring stable component supply with guaranteed 20-year data retention and extended temperature operation.

Supply support for CY14V101QS-BK108XQ 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 memory and programmable solutions for industrial, automotive, and IoT applications, with global R&D and manufacturing infrastructure.

CY14V101QS belongs to Cypress's nvSRAM product line, engineered specifically to replace battery-backed SRAM in mission-critical systems where reliability, speed, and zero-maintenance nonvolatility are mandatory.

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 layout. Connecting VCAP to ground violates absolute maximum ratings and will damage the device.

How does Hardware STORE differ from Software STORE in timing and reliability?

Hardware STORE initiates within 200 ns of HSB pin assertion and proceeds independently of firmware execution-ensuring data save even if the host MCU hangs. Software STORE requires SPI command issuance and is subject to bus arbitration delays, making it less deterministic for safety-critical shutdowns.

Can CY14V101QS-BK108XQ operate in standard SPI mode without enabling QPI?

Yes-it defaults to standard SPI mode on power-up and supports all legacy SPI opcodes (READ, WRITE, WREN, WRDI). QPI mode must be explicitly enabled via QPIEN instruction; no hardware configuration is needed. SPI mode operates up to 40 MHz with zero-cycle latency for both read and write.

Is the 8-byte serial number truly one-time programmable, and how is it written?

Yes-the serial number is stored in OTP memory and can be written only once using the WRSN instruction after issuing WREN. Subsequent attempts return status error. The field is retained across STORE/RECALL cycles and survives full power cycles, providing immutable device identity for traceability and security binding.