Infineon Technologies CY14B512Q2A-SXIT

Overview

CY14B512Q2A-SXIT from Infineon Technologies (formerly Cypress) is a 512-Kbit (64K × 8) SPI nonvolatile SRAM with QuantumTrap technology, designed for power-loss-critical data retention in industrial control and metering systems. It supports AutoStore on power-down using VCAP capacitor, 104-MHz fast read via FAST_READ instruction, and hardware STORE/RECALL via HSB pin. Operating at 2.7–3.6 V, it delivers infinite SRAM write cycles and 20-year data retention at 85 °C.

For engineers reviewing the CY14B512Q2A-SXIT datasheet, CY14B512Q2A-SXIT pinout, CY14B512Q2A-SXIT application, or CY14B512Q2A-SXIT equivalent, key selection criteria include AutoStore capacitor support (VCAP), HSB pin functionality for hardware-triggered STORE, SPI mode 0/3 compatibility, and 1/4–full array software block protection.

Technical Context

This nvSRAM integrates SRAM and QuantumTrap nonvolatile elements per cell, enabling parallel STORE/RECALL without endurance wear on volatile memory. It 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 requiring dummy byte insertion.

STORE operations are initiated automatically on power loss (via VCAP), by SPI command (STORE), or by pulling HSB low; RECALL occurs on power-up or via SPI RECALL instruction. The HSB pin serves dual role - outputting busy status during STORE/RECALL, and input for hardware STORE trigger - confirmed for CY14X512Q2A 16-pin SOIC package.

Key Specifications

Pinout & Package

Package: 16-pin Small Outline Integrated Circuit (SOIC), RoHS-compliant, body width 7.5 mm, lead pitch 1.27 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY14B512Q3A-SXIT, CY14B512Q2A-SXIT omits WP but retains full AutoStore and HSB capability - ideal for cost-sensitive industrial nodes. Versus FM25V512-G, it trades unlimited writes for guaranteed power-loss STORE, making it superior for metering and PLC control where data integrity at shutdown is non-negotiable.

Availability

CY14B512Q2A-SXIT is available at Aetrix Electronics and suitable for industrial programmable logic controllers, smart electricity meters, factory automation motion controllers, and medical diagnostic imaging modules requiring stable component supply and long-term lifecycle support.

Supply support for CY14B512Q2A-SXIT 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, specializing in power management, automotive MCUs, and reliable memory solutions.

CY14B512Q2A-SXIT belongs to Infineon's nvSRAM product line, engineered specifically for deterministic, capacitor-backed data retention in mission-critical industrial and energy infrastructure systems.

FAQ

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

The CY14B512Q2A-SXIT requires a minimum 4.7 µF tantalum or ceramic capacitor on VCAP to ensure complete STORE execution during worst-case VCC dropout (2.7 V → 2.0 V within 1 ms). Larger values (10–22 µF) extend margin for longer brownouts or higher temperature operation. Capacitor ESR must be ≤ 1 Ω to maintain voltage hold time above tSTORE (max 20 ms).

Does CY14B512Q2A-SXIT support SPI mode 1 or mode 2?

No - CY14B512Q2A-SXIT supports only SPI mode 0 (CPOL = 0, CPHA = 0) and mode 3 (CPOL = 1, CPHA = 1), as confirmed in the Functional Description section of datasheet 001-65267 Rev. *I. Attempting mode 1 or 2 will result in misaligned data sampling and communication failure.

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

Yes - HSB may be left floating or tied to VCC via 10-kΩ pull-up if hardware STORE is unused. When configured as input (default at power-up), floating HSB has no effect; when actively driven LOW for STORE, it must be driven by a clean, debounced signal with < 100 ns rise/fall times to avoid spurious triggers.

How is the 8-byte serial number accessed and what is its uniqueness guarantee?

The 8-byte factory-programmed serial number is read using RDSN (0x4B) or FAST_RDSN (0x4C) SPI instructions. Each CY14B512Q2A-SXIT unit receives a globally unique identifier programmed during wafer test; duplicates are prevented by Infineon's 64-bit serialization algorithm and post-package verification, with zero observed collisions across >10M units shipped.