Infineon Technologies CY14V101QS-SE108XQ

Overview

CY14V101QS-SE108XQ 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 AutoStore/RECALL via VCAP and HSB, and operates across –40 °C to 105 °C with dual supply rails (VCC: 2.7–3.6 V, VCCQ: 1.71–2.0 V). It is used in industrial PLCs for real-time data logging with power-loss resilience.

For engineers reviewing the CY14V101QS-SE108XQ datasheet, CY14V101QS-SE108XQ pinout, CY14V101QS-SE108XQ application, or CY14V101QS-SE108XQ equivalent, key selection criteria include QPI interface mode support, AutoStore timing under voltage droop, HSB pin behavior during hardware STORE, and SRAM-to-SONOS endurance (1M STORE cycles).

Technical Context

The device implements a hybrid memory architecture where all read/write operations target the SRAM array, while STORE/RECALL transfers data between SRAM and interleaved SONOS Quantum Trap cells. It supports SPI modes 0 and 3, and QPI instruction set with opcodes for Standard/Fast/Dual/Quad I/O reads and writes.

STORE execution occurs via three independent paths: AutoStore (triggered by VCAP discharge at power-down), Software STORE (SPI opcode 0x7E), or Hardware STORE (HSB pin pulled LOW). RECALL is automatic at power-up or initiated via SPI opcode 0x77, restoring full 128KB contents to SRAM within 10 ms.

Key Specifications

Pinout & Package

Available in 16-pin SOIC (standard pinout) and 24-ball FBGA packages. The CY14V101QS-SE108XQ variant uses the 16-pin SOIC package with exposed pad not present; pin 9 is VCAP, pin 10 is VCCQ, and pin 15 is HSB - all electrically validated per Rev. *M datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM25V10-G and MB85RS1MT, CY14V101QS-SE108XQ uniquely combines 105 °C operation, HSB-triggered STORE, and VCAP-based fail-safe AutoStore - making it optimal for industrial control systems requiring deterministic power-loss response and long-term data integrity.

Availability

CY14V101QS-SE108XQ is available at Aetrix Electronics and suitable for industrial data loggers, railway signaling controllers, and programmable logic controllers requiring stable component supply, long-lifecycle assurance, and qualified automotive-grade sourcing.

Supply support for CY14V101QS-SE108XQ 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 infrastructure.

The CY14V series targets applications demanding SRAM speed with nonvolatile persistence - specifically engineered for deterministic power-loss recovery in mission-critical embedded systems.

FAQ

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

The VCAP pin supplies temporary energy to complete the STORE operation during VCC dropout. Cypress specifies a 4.7 µF ±20% tantalum or ceramic capacitor with ≤100 mΩ ESR, placed within 5 mm of the pin. Undersizing causes incomplete STORE; connecting VCAP to ground violates absolute maximum ratings and may damage the device.

How does the HSB pin function during a Hardware STORE operation?

When HSB is driven LOW externally for ≥100 ns, the device initiates STORE immediately and drives HSB LOW until completion (typ. 10 ms). After completion, HSB goes HIGH via internal weak pull-up. During this time, all SPI commands are ignored. HSB must not be pulled LOW during AutoStore or RECALL to avoid conflict.

Can the CY14V101QS-SE108XQ operate in Single SPI mode with full 108-MHz performance?

No. 108-MHz operation is only supported in Dual and Quad I/O modes using Fast Read instructions (e.g., QIOR). In Single SPI mode, maximum clock frequency is 40 MHz with zero-cycle latency for standard READ, and Fast Read is not available. QPI mode is required to achieve rated 54 MBps throughput.

Is the Serial Number register truly one-time programmable, and how is it accessed?

Yes - the 8-byte Serial Number register is OTP and can be written only once after power-up, using WRSN instruction (0x9F) with valid security key. Subsequent attempts return status error. It resides in dedicated memory separate from main array and survives all STORE/RECALL cycles, supporting device-level traceability in regulated industries.