Infineon Technologies CY14V101Q3-SFXI

Overview

CY14V101Q3-SFXI from Cypress Semiconductor is a 1 Mbit (128 K × 8) serial SPI nonvolatile SRAM with integrated QuantumTrap SONOS nonvolatile storage, AutoStore on power-down via VCAP capacitor, Power-Up RECALL, and support for SPI modes 0 and 3 at up to 30 MHz clock rate - deployed in industrial data logging, real-time metering, and PLC configuration backup.

For engineers reviewing the CY14V101Q3-SFXI datasheet, CY14V101Q3-SFXI pinout, CY14V101Q3-SFXI application, or CY14V101Q3-SFXI equivalent, key selection considerations include VCAP-based AutoStore timing, HSB-busy signaling during STORE/RECALL, software-controlled STORE/RECALL opcodes, and dual-voltage operation (VCC = 3.0–3.6 V, VCCQ = 1.65–1.95 V).

Technical Context

The device integrates SRAM and QuantumTrap nonvolatile elements per cell, enabling infinite SRAM read/write cycles while limiting STORE endurance to 1 million cycles. STORE transfers data in parallel from SRAM to nonvolatile cells; RECALL restores full 128 K × 8 array on power-up or via SPI instruction.

AutoStore is triggered by VCC falling below VSWITCH, using charge from external VCAP capacitor; Hardware STORE is initiated by pulling HSB low (conditional on prior write), and Software STORE uses dedicated SPI opcode - all inhibit memory access until tSTORE completion (~15 ms typical), signaled via HSB pin or RDY bit.

Key Specifications

Pinout & Package

16-pin Small Outline Integrated Circuit (SOIC) package with gull-wing leads, RoHS-compliant, 1.27 mm pitch, body size 10.3 mm × 7.5 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM25V01A-G and AT25SF041-SSHD-B, CY14V101Q3-SFXI uniquely combines deterministic AutoStore timing, HSB-busy signaling, and dual-voltage I/O - making it optimal for systems requiring guaranteed power-loss data capture without F-RAM cost premium or Flash complexity.

Availability

CY14V101Q3-SFXI is available at Aetrix Electronics and suitable for industrial data loggers, smart electricity meters, programmable logic controllers, and medical infusion pumps requiring stable component supply and long-term lifecycle assurance.

Supply support for CY14V101Q3-SFXI 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.

CY14V101Q3 belongs to the nvSRAM product line engineered specifically for deterministic, capacitor-backed nonvolatile storage in systems lacking battery backup - targeting applications where data integrity across uncontrolled power loss is mission-critical.

FAQ

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

The CY14V101Q3-SFXI requires a minimum 12 µF tantalum or ceramic capacitor on the VCAP pin to ensure complete STORE execution during VCC collapse. Capacitance must be placed within 10 mm of the pin with low-ESR (< 1 Ω) and rated for ≥6.3 V. Undersized or degraded capacitors cause partial STOREs and data corruption in both SRAM and status register.

How does Hardware STORE differ from Software STORE in terms of write-condition checking?

Hardware STORE (triggered by HSB low) only executes if at least one SRAM write has occurred since the last STORE or RECALL - preventing unnecessary nonvolatile writes. Software STORE (SPI 0x81) executes unconditionally, regardless of prior SRAM activity, enabling forced backup for critical states even after idle periods.

Can the WP pin override software write protection settings?

Yes - the WP pin provides hardware-level write lock that takes precedence over software protection. When WP is driven low, it disables all write operations including WRITE, STORE, WRSR, and block protection changes, even if the status register indicates write-enable. This ensures fail-safe protection against firmware bugs or memory corruption.

What happens if AutoStore is enabled but VCAP is left unconnected?

If AutoStore is enabled (ASENB issued) and VCAP is unconnected or shorted, the device attempts STORE during power-down without energy reserve - resulting in incomplete programming, corrupted SRAM contents, and invalid status register bits. Recovery requires issuing WRSR to rewrite BP0/BP1/WPEN bits, which itself requires prior WREN and functional VCC.