Infineon Technologies CY14V101QS-BK108XQT

Overview

CY14V101QS-BK108XQT 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 or HSB pin, and 20-year data retention at 85 °C. It serves as a drop-in replacement for battery-backed SRAM in industrial control logging and power-loss-critical firmware storage.

For engineers reviewing the CY14V101QS-BK108XQT datasheet, CY14V101QS-BK108XQT pinout, CY14V101QS-BK108XQT application, or CY14V101QS-BK108XQT equivalent, key selection factors include QPI/SPI/DPI mode flexibility, hardware STORE/RECALL timing behavior, VCAP-supported AutoStore latency, and dual-voltage I/O (VCCQ = 1.71–2.0 V) compatibility with low-power microcontrollers.

Technical Context

The CY14V101QS-BK108XQT implements a hybrid memory architecture where all read/write operations occur on the SRAM array, while STORE/RECALL transfers data to/from a parallel SONOS nonvolatile array using quantum-trap charge storage. Its SPI controller supports modes 0 and 3 (CPOL/CPHA = [0,0] and [1,1]) and dynamically reconfigures I/O pins (I/O0–I/O3) based on instruction opcode-enabling seamless transition between Single, Dual, and Quad I/O protocols without external logic.

Power management is tightly coupled to nonvolatile operation: AutoStore triggers on VCC dropout with energy supplied by the external VCAP capacitor, while Hardware STORE initiates on falling edge of HSB pin with defined tHHHD timing. RECALL occurs automatically at power-up, and both STORE and RECALL support software initiation via dedicated SPI opcodes (0x81 and 0x82), enabling deterministic data persistence control in real-time systems.

Key Specifications

Pinout & Package

Available in 16-pin SOIC (standard pinout) and 24-ball FBGA packages. The CY14V101QS-BK108XQT variant uses the 16-pin SOIC package with exposed pad not present; pin assignments are electrically validated per Document Number 001-85257 Rev. *M.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM25V10-G and MB85RS1MT, the CY14V101QS-BK108XQT uniquely delivers 108-MHz QPI bandwidth, hardware-triggered STORE via HSB, and 20-year retention at 105 °C-making it optimal for high-reliability industrial and automotive recorders where timing determinism and thermal resilience are mandatory.

Availability

CY14V101QS-BK108XQT is available at Aetrix Electronics and suitable for industrial data loggers, medical device parameter storage, and automotive ADAS event recorders requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CY14V101QS-BK108XQT 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, mixed-signal ICs for embedded systems, with expertise in nonvolatile memory, PSoC programmable SoCs, and USB connectivity solutions.

The CY14V101QS belongs to Cypress's nvSRAM product line, engineered specifically to replace battery-backed SRAM in mission-critical applications where data integrity during power loss is non-negotiable-targeting industrial automation, medical instrumentation, and transportation electronics.

FAQ

What is the minimum VCAP capacitance required for reliable AutoStore operation?

The CY14V101QS-BK108XQT requires a minimum 4.7 µF tantalum or ceramic capacitor on the VCAP pin to guarantee successful STORE during VCC dropout down to 2.7 V. Larger values (up to 10 µF) extend hold-up time but increase board area and cost; derating for temperature and aging is recommended per manufacturer guidelines.

Can the HSB pin be used simultaneously as input and output?

Yes-the HSB pin is bidirectional: it outputs an open-drain BUSY signal (LOW during STORE/RECALL) and accepts a falling-edge trigger for Hardware STORE. An external pull-up resistor (typically 4.7 kΩ) is mandatory to ensure proper HIGH-level detection and avoid floating states during CS deassertion.

Does the CY14V101QS-BK108XQT support Execute-in-Place (XIP) from QPI mode?

Yes-it supports Continuous Read (XIP) mode in Quad I/O, enabling direct code execution from the nvSRAM array without local RAM copy. This requires Fast Read opcodes (QIOR) and proper dummy cycle configuration; address wrap behavior is enabled by default for seamless sequential access.

How is write protection enforced across SPI, DPI, and QPI modes?

Hardware write protection via the WP pin is active in SPI and DPI modes only; in QPI mode, WP becomes I/O2 and write protection is enforced exclusively through Status Register BP bits. Software write disable (WRDI) applies universally, but block protection settings persist across all interface modes and power cycles.