Infineon Technologies CY14B512Q2A-SXI

Overview

CY14B512Q2A-SXI from Infineon Technologies (formerly Cypress) is a 512-Kbit (64K × 8) SPI nonvolatile SRAM with QuantumTrap technology, designed for mission-critical data retention in power-loss scenarios. It supports AutoStore on power-down using an external VCAP capacitor, 104-MHz fast-read SPI access via FAST_READ instruction, and hardware STORE/RECALL control via HSB pin - deployed in industrial PLCs, medical data loggers, and telecom base station configuration storage.

For engineers reviewing the CY14B512Q2A-SXI datasheet, CY14B512Q2A-SXI pinout, CY14B512Q2A-SXI application, or CY14B512Q2A-SXI equivalent, key selection criteria include AutoStore enablement via VCAP, HSB-driven hardware STORE timing, SPI mode 0/3 compatibility, and 2.7–3.6 V operating range with 8 µA sleep current.

Technical Context

This nvSRAM integrates SRAM and QuantumTrap nonvolatile elements per cell, enabling infinite SRAM read/write cycles while guaranteeing 1 million STORE cycles and 20-year data retention at 85 °C. The device operates as an SPI slave supporting modes 0 and 3, with dual-speed interface: 40 MHz zero-cycle-delay READ/WRITE and 104 MHz FAST_READ using a dummy byte.

STORE operations occur automatically on power-down (AutoStore), via SPI STORE instruction (Software STORE), or by asserting HSB low (Hardware STORE); RECALL restores data on power-up or via SPI RECALL. Status is reported via RDY bit and active-low HSB pin - which transitions HIGH after STORE completion and can be externally pulled LOW to trigger hardware STORE.

Key Specifications

Pinout & Package

Package: 16-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, industrial temperature grade (–40 °C to +85 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY14B512Q2A-ZS25XIT and FM25V20A-G, the CY14B512Q2A-SXI uniquely delivers synchronized hardware STORE initiation, VCAP-based AutoStore, and 104 MHz FAST_READ - making it the only option for applications requiring guaranteed, low-latency, power-fail-safe data capture without external supervision.

Availability

CY14B512Q2A-SXI is available at Aetrix Electronics and suitable for industrial data loggers, medical diagnostic equipment, telecom base station controllers, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for CY14B512Q2A-SXI 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

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, delivering power management, sensing, connectivity, and security solutions for automotive, industrial, and IoT markets.

This device belongs to Infineon's nvSRAM product line - engineered specifically for deterministic, battery-free nonvolatile data retention in systems subject to unpredictable power interruptions.

FAQ

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

The datasheet specifies a minimum 4.7 µF tantalum capacitor on VCAP for guaranteed AutoStore functionality across the full industrial temperature range and voltage drop profile. Lower values may cause incomplete STORE under worst-case conditions (e.g., rapid VCC collapse at 85 °C). Ceramic capacitors are not recommended due to DC bias and aging effects that reduce effective capacitance.

Can the HSB pin be left unconnected if Hardware STORE is not used?

Yes - HSB is internally weak-pulled HIGH when unused. Leaving it floating is acceptable, but tying it to VCC via a 10 kΩ resistor improves noise immunity in electrically noisy industrial environments. Do not connect HSB to ground or VSS, as this will permanently disable Hardware STORE and may interfere with status reporting.

Does Software STORE block SPI communication during execution?

Yes - issuing the STORE instruction halts all SPI activity until completion. During this time, the RDY bit in the Status Register reads '1', and HSB goes LOW. Typical STORE duration is 10–15 ms; the host must poll RDSR or monitor HSB before issuing subsequent commands. No partial writes or interrupts are supported mid-STORE.

Is the 104 MHz FAST_READ mode compatible with standard SPI controllers?

Yes - FAST_READ uses standard SPI signaling but requires the host to send a dummy byte after the address. Most modern microcontrollers (e.g., STM32H7, NXP i.MX RT, Renesas RA6M5) support this via configurable SPI DMA or custom opcode handling. Legacy controllers limited to fixed 8-bit transfers may require firmware modification to insert the dummy cycle.