Infineon Technologies CY14V101QS-SF108XI

Overview

CY14V101QS-SF108XI 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 20-year data retention at 85 °C. It serves as a drop-in replacement for battery-backed SRAM in industrial control logging and power-fail-safe firmware storage.

For engineers reviewing the CY14V101QS-SF108XI datasheet, CY14V101QS-SF108XI pinout, CY14V101QS-SF108XI application, or CY14V101QS-SF108XI equivalent, key selection criteria include QPI bandwidth (108 MHz), STORE/RECALL latency, VCAP-assisted power-loss recovery, and quad/dual/single SPI mode flexibility under extended temperature (–40 °C to 105 °C).

Technical Context

The CY14V101QS-SF108XI implements a hybrid memory architecture where all read/write operations target the SRAM array, while STORE/RECALL transfers data to/from the embedded SONOS nonvolatile element. Its QPI interface supports opcode-driven burst wrap and XIP-capable continuous read modes across SPI, DPI, and QPI protocols.

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, ensuring deterministic SRAM initialization without host intervention.

Key Specifications

Pinout & Package

Package: 16-pin SOIC (Standard Pinout per Figure 1, Document 001-85257 Rev. *M). Pin assignments validated against official Cypress pin definition table 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 MB85RS1MT, CY14V101QS-SF108XI uniquely delivers QPI bandwidth, integrated AutoStore with VCAP, and SONOS-based 20-year retention-making it optimal for high-speed, self-contained, power-fail-resilient systems.

Availability

CY14V101QS-SF108XI is available at Aetrix Electronics and suitable for industrial data loggers, medical event recorders, and automotive ADAS modules requiring stable component supply, long-term lifecycle assurance, and qualified extended-temperature performance.

Supply support for CY14V101QS-SF108XI 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 communications systems.

The CY14V series targets mission-critical applications needing battery-free nonvolatility, combining SRAM speed with FLASH-like persistence-specifically engineered for power-fail-safe data capture in harsh environments.

FAQ

What is the role of the VCAP pin, and what capacitor value is recommended?

The VCAP pin supplies hold-up energy during VCC collapse to complete the AutoStore operation. Cypress specifies a 4.7-µF tantalum or ceramic capacitor with ≤100-mΩ ESR, rated ≥6.3 V. The capacitor must be placed within 5 mm of VCAP/VSS pins and never connected to ground. Insufficient capacitance causes STORE failure and data loss.

How does the HSB pin function during Hardware STORE, and what timing constraints apply?

HSB acts as both an open-drain status indicator (driven LOW during STORE) and a level-sensitive trigger input. To initiate Hardware STORE, HSB must be pulled LOW for ≥100 ns while CS is HIGH and VCC is stable. After triggering, HSB remains LOW for tHHHD (max 20 µs), then transitions HIGH. External pull-up is optional due to internal weak pull-up.

Can the CY14V101QS-SF108XI operate in Single SPI mode only, and what pins are unused?

Yes-it supports SPI Mode 0 and 3 at up to 40 MHz with zero-cycle latency. In Single SPI mode, WP (I/O2) and NC (I/O3) are unused and must be left floating. SO and SI retain dedicated input/output roles; SCK and CS remain active. No configuration register changes are needed-mode selection is opcode-driven, not pin-strapped.

What is the purpose of the Serial Number OTP feature, and how is it programmed?

The 8-byte Serial Number is one-time programmable via WRSN instruction and locked permanently after first write. It supports device-level traceability in regulated industries and anti-cloning measures. Programming requires WREN, then WRSN with address 0x00 followed by 8 data bytes. Once written, RDSN returns the stored value; reprogramming is electrically prohibited.