Infineon Technologies CY14B512PA-SFXI

Overview

CY14B512PA from Infineon Technologies (formerly Cypress) is a 512-Kbit (64 K × 8) SPI nonvolatile SRAM with integrated real-time clock, designed for data-critical industrial logging and time-stamped event storage. It features AutoStore using VCAP capacitor backup, 104 MHz fast-read SPI support, RTC with alarm/watchdog/square-wave output, and 20-year data retention at 85 °C.

For engineers reviewing the CY14B512PA datasheet, CY14B512PA pinout, CY14B512PA application, or CY14B512PA equivalent, key selection criteria include SPI mode 0/3 compatibility, hardware STORE/RECALL via HSB pin, RTC backup power options (VCAP vs VRTCbat), and QuantumTrap endurance (1M STORE cycles, infinite SRAM reads/writes).

Technical Context

This nvSRAM integrates SRAM and QuantumTrap nonvolatile memory on a single die, enabling seamless STORE (SRAM → nonvolatile) on power loss and RECALL (nonvolatile → SRAM) at power-up. The RTC subsystem includes independent counters, programmable interrupts, and dual backup sources - capacitor (VCAP) or battery (VRTCbat) - with 0.45 µA typical backup current.

SPI interface supports two speed tiers: 40 MHz zero-cycle-delay read/write and 104 MHz fast-read using dedicated opcodes. Clock generation uses external 32.768 kHz crystal (Xin/Xout), and square-wave output (INT/SQW) is configurable at 1 Hz, 512 Hz, 4.096 kHz, or 32.768 kHz.

Key Specifications

Pinout & Package

16-pin SOIC (Small Outline Integrated Circuit) package, RoHS-compliant, with exposed pad not present. Pin functions validated per Infineon Document 001-65268 Rev. *I.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STK15C88-3J and FM31L52-G, CY14B512PA uniquely combines SPI speed (104 MHz fast-read), capacitor-backed AutoStore, and 20-year RTC-retained data - making it optimal for new 3.3 V industrial systems requiring time-aware nonvolatile logging.

Availability

CY14B512PA is available at Aetrix Electronics and suitable for industrial data loggers, smart energy meters, programmable logic controllers, and medical diagnostic devices requiring stable component supply across extended product lifecycles.

Supply support for CY14B512PA 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, industrial, and security solutions.

CY14B512PA belongs to Infineon's nvSRAM product line, engineered specifically for mission-critical applications where data integrity, time stamping, and power-loss resilience cannot be compromised - such as utility metering, factory automation, and medical instrumentation.

FAQ

What is the minimum VCAP capacitance required for reliable AutoStore?

A minimum of 4.7 µF tantalum or ceramic capacitor is required on VCAP to ensure full 512-Kbit STORE completion during VCC collapse. Larger values (up to 100 µF) extend hold-up time but increase board area and cost. Layout must minimize ESL and avoid grounding VCAP, as specified in Section 25 of the datasheet.

Can the RTC operate without an external crystal?

No. The RTC requires a 32.768 kHz crystal connected between Xin and Xout for accurate timekeeping. Internal oscillators are not provided. If crystal layout is impractical, use VRTCbat with a 32.768 kHz oscillator module - but note that this increases BOM count and reduces integration benefit.

How does Hardware STORE differ from Software STORE in terms of timing and reliability?

Hardware STORE (triggered by pulling HSB LOW) initiates immediately with no SPI overhead, completing in ≤20 ms. Software STORE requires valid SPI framing and instruction execution, adding ~1–3 µs latency. Hardware STORE is preferred for deterministic fail-safe logging; Software STORE suits scheduled backups during idle periods.

Is the CY14B512PA pin-compatible with CY14C512PA or CY14E512PA?

Yes - all three variants share identical 16-pin SOIC footprint and pinout. However, they differ in supply voltage ranges: CY14C512PA (2.4–2.6 V), CY14B512PA (2.7–3.6 V), and CY14E512PA (4.5–5.5 V). Swapping requires verifying VCC rail compatibility and adjusting decoupling.