Infineon Technologies CY14V101QS-SE108XI

Overview

CY14V101QS-SE108XI 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 operates across –40 °C to 105 °C with AutoStore via VCAP capacitor. Used in industrial PLCs for real-time data logging with power-loss resilience.

For engineers reviewing the CY14V101QS-SE108XI datasheet, CY14V101QS-SE108XI pinout, CY14V108XI application, or CY14V101QS-SE108XI equivalent, key selection criteria include QPI read/write latency at 108 MHz, AutoStore timing under 20 ms, HSB-driven hardware STORE capability, and dual-voltage I/O (VCCQ = 1.71–2.0 V) compatibility with low-power microcontrollers.

Technical Context

The CY14V101QS-SE108XI implements a hybrid memory architecture where all read/write operations target the SRAM array, while STORE/RECALL commands manage data transfer to/from the SONOS-based nonvolatile cells. Its QPI interface uses four I/O lines (I/O0–I/O3) with opcodes enabling burst wrap and XIP-capable continuous reads.

It supports three STORE initiation methods-AutoStore (power-down triggered via VCAP), Software STORE (SPI instruction), and Hardware STORE (HSB pin assertion)-and two RECALL methods-Auto RECALL (power-up) and Software RECALL-with guaranteed 20-year data retention at 85 °C and one million STORE cycles.

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 FM25V10-G and AT25SF128A-MAHB-T, CY14V101QS-SE108XI uniquely balances 108-MHz QPI throughput, infinite SRAM writes, and hardware-triggered STORE-making it optimal for high-frequency industrial data capture where both speed and power-loss resilience are mandatory.

Availability

CY14V101QS-SE108XI 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 ranges and long product lifecycles.

Supply support for CY14V101QS-SE108XI 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 IoT applications.

The CY14V101QS belongs to Cypress's nvSRAM product line, engineered specifically for mission-critical systems needing instant-on nonvolatility, zero-latency SRAM access, and deterministic power-loss data preservation.

FAQ

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

The CY14V101QS-SE108XI requires a minimum 0.47 µF ceramic capacitor on the VCAP pin to guarantee STORE completion within 20 ms during VCC dropout from 3.0 V to 2.0 V. Larger values (e.g., 1.0 µF) extend margin but increase board area and cost; tantalum capacitors are not recommended due to ESR and aging effects.

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

No. HSB operates in open-drain output mode during STORE execution (driven LOW when busy, pulled HIGH afterward) and functions as an input only when externally asserted LOW to initiate hardware STORE. Concurrent input/output use violates timing and may cause bus contention or incomplete STORE sequences.

Does the 108-MHz interface speed apply to both read and write operations in QPI mode?

Yes-108-MHz clock supports 54 MBps throughput for both reads and writes in QPI mode, but only Fast Read instructions (e.g., QIOR) achieve this speed; standard READ is limited to 40 MHz with zero-cycle latency. Write instructions (QIOW) operate at full 108 MHz without dummy cycles.

How is the 8-byte serial number programmed, and is it reprogrammable?

The 8-byte serial number is one-time programmable (OTP) via the WRSN instruction and cannot be altered after initial programming. It resides in dedicated nonvolatile registers separate from main memory and persists across STORE/RECALL cycles, supporting device-level traceability in regulated industries.