Infineon Technologies CY14V101QS-SF108XQ

Overview

CY14V101QS-SF108XQ from Cypress Semiconductor is a 1-Mbit (128K × 8) Quad SPI nonvolatile SRAM integrating SRAM and SONOS FLASH Quantum Trap in each cell. It delivers 108-MHz interface bandwidth, 54 MBps read/write throughput, and supports SPI/DPI/QPI modes with hardware STORE/RECALL via HSB pin and VCAP capacitor - deployed in industrial PLCs for real-time data logging during power loss.

For engineers reviewing the CY14V101QS-SF108XQ datasheet, CY14V101QS-SF108XQ pinout, CY14V101QS-SF108XQ application, or CY14V101QS-SF108XQ equivalent, key selection criteria include AutoStore timing under voltage droop, QPI burst wrap latency, SRAM-to-SONOS STORE endurance (1M cycles), and dual-voltage I/O (VCCQ = 1.71–2.0 V) compatibility with low-power microcontrollers.

Technical Context

The CY14V101QS-SF108XQ implements a hybrid memory architecture where all read/write operations target the SRAM array, while STORE/RECALL commands manage data transfer to/from the embedded SONOS nonvolatile cells. Its QPI interface supports opcode-driven burst wrap and XIP-capable continuous read modes.

It uses SPI modes 0 and 3 (CPOL/CPHA = [0,0] and [1,1]), supports three STORE triggers (AutoStore on power-down, Software STORE via SPI instruction, Hardware STORE via HSB pin assertion), and provides two low-power states: Sleep (280 µA @ 85 °C) and Hibernate (8 µA @ 85 °C).

Key Specifications

Pinout & Package

Package: 16-pin SOIC (standard pinout per Figure 1, Document 001-85257 Rev. *M). Pin mapping validated against 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 AT25SF041, CY14V101QS-SF108XQ uniquely combines SRAM-speed access, deterministic hardware STORE, and SONOS-based 20-year retention - making it the sole choice for applications requiring both real-time performance and guaranteed power-loss resilience.

Availability

CY14V101QS-SF108XQ is available at Aetrix Electronics and suitable for industrial data loggers, railway signaling controllers, medical infusion pumps, and smart grid RTUs requiring stable component supply across extended temperature and long product lifecycles.

Supply support for CY14V101QS-SF108XQ 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 solutions for industrial, automotive, and IoT applications, with global manufacturing and quality certifications including ISO/TS 16949 and AEC-Q100.

The CY14V series targets mission-critical data retention in environments where power instability, temperature extremes, and long-term reliability preclude conventional flash or battery-backed SRAM - emphasizing deterministic STORE/RECALL and seamless SPI interoperability.

FAQ

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

The CY14V101QS-SF108XQ requires a minimum 4.7 µF tantalum or ceramic capacitor on VCAP to ensure sufficient energy for completing STORE within the specified tSTORE time (max 20 ms) during VCC dropout. Lower values risk incomplete STORE and data corruption; derating to 10 µF is recommended for designs operating near 105 °C.

Can the HSB pin be used simultaneously as input and output in the same power cycle?

No. HSB operates in open-drain push-pull mode: it outputs LOW during active STORE (hardware or software), then transitions HIGH with weak internal pull-up. Using it as input (to trigger STORE) requires driving it externally LOW while CS is HIGH - this must occur outside any ongoing STORE cycle to avoid conflict with internal driver state.

Does Quad SPI mode require external pull-up resistors on I/O2 and I/O3 pins?

Yes. In QPI mode, WP (I/O2) and NC (I/O3) become active bidirectional I/O lines. Cypress specifies 4.7-kΩ external pull-ups on both pins to ensure proper signal integrity during command/address/data phases, especially at 108-MHz operation where unterminated lines cause reflections and timing violations.

How does the device handle address rollover during burst wrap reads in XIP mode?

In Continuous (XIP) read mode, the CY14V101QS-SF108XQ automatically increments the internal address counter on each byte read and wraps from 0x1FFFF back to 0x00000 without CPU intervention. This enables seamless execution of code from nvSRAM across page boundaries, with no latency penalty or alignment constraints on the 128K-byte boundary.