Infineon Technologies CY14V101QS-BK108XIT

Overview

CY14V101QS-BK108XIT from Cypress Semiconductor is a 1-Mbit (128K × 8) Quad SPI nonvolatile SRAM integrating SRAM and SONOS FLASH Quantum Trap in each cell, supporting 108-MHz interface, AutoStore/RECALL via VCAP and HSB, and extended industrial temperature range (–40 °C to 105 °C). It delivers 54 MBps read/write bandwidth and infinite SRAM endurance for mission-critical data logging in power-loss-prone systems.

For engineers reviewing the CY14V101QS-BK108XIT datasheet, CY14V101QS-BK108XIT pinout, CY14V101QS-BK108XIT application, or CY14V101QS-BK108XIT equivalent, key selection factors include QPI/SPI/DPI mode flexibility, hardware STORE/RECALL timing control, VCAP-assisted data retention during brownout, and dual-voltage I/O (VCCQ = 1.71–2.0 V) compatibility with low-power microcontrollers.

Technical Context

The CY14V101QS-BK108XIT implements a hybrid memory architecture where all user accesses target the SRAM array, while background STORE/RECALL operations transfer data to/from SONOS-based nonvolatile cells. Its QPI interface supports single/dual/quad I/O modes using dedicated opcodes, with full support for SPI modes 0 and 3 (CPOL/CPHA = [0,0] and [1,1]).

STORE is triggered by three independent mechanisms: AutoStore (power-down with VCAP), Software STORE (SPI instruction), or Hardware STORE (HSB pin assertion); RECALL occurs automatically at power-up or via software command. The device uses separate core (VCC = 2.7–3.6 V) and I/O (VCCQ = 1.71–2.0 V) supplies to decouple logic voltage scaling from memory operation.

Key Specifications

Pinout & Package

Package: 16-pin SOIC (standard pinout per Figure 1, Document 001-85257 Rev. *M, Page 4).

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM25V01-G and AT25SF041, CY14V101QS-BK108XIT uniquely combines infinite SRAM write endurance, deterministic hardware STORE/RECALL, and VCAP-assisted zero-intervention data preservation-making it optimal for safety-critical, power-unstable environments where data integrity cannot be compromised.

Availability

CY14V101QS-BK108XIT is available at Aetrix Electronics and suitable for industrial data loggers, automotive telematics units, medical infusion pumps, and smart grid metering terminals requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CY14V108XIT 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.

The CY14V101QS belongs to Cypress's nvSRAM product line, engineered specifically for systems demanding both SRAM-speed access and nonvolatile data retention without battery backup-targeting power-loss-resilient control, instrumentation, and safety-critical edge nodes.

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 VCC dropout. A 4.7 µF ±20% tantalum or ceramic capacitor rated ≥6.3 V must be placed within 10 mm of the pin with low-ESR (<1 Ω) and low-ESL 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 100 ns of HSB pin assertion and completes in ≤20 ms, independent of SPI clock or host firmware state. Software STORE requires valid SPI communication, instruction execution, and CS timing-introducing up to 50 µs latency and dependency on host readiness. Hardware STORE is preferred for fail-safe power-loss response.

Can the CY14V101QS-BK108XIT operate in standard SPI mode only, without QPI or DPI features enabled?

Yes. The device defaults to standard SPI mode after power-up. QPI and DPI modes must be explicitly enabled using QPIEN and DPIEN instructions. All pins retain their SPI functions (e.g., WP remains Write Protect, NC remains no-connect) unless QPI is activated, ensuring backward compatibility with legacy SPI controllers.

Is the 108-MHz interface speed supported in all operating modes and temperature ranges?

108-MHz operation is specified only for Fast Read instructions (FAST_READ, QIOR, etc.) across –40 °C to 105 °C. Standard READ and WRITE instructions are limited to 40 MHz with zero-cycle latency. AC switching characteristics at 108 MHz require controlled impedance PCB routing and proper termination to meet tSU/tH timing margins.