Infineon Technologies CY15B104QSN-108SXIT

Overview

CY15B104QSN-108SXIT from Infineon is a 4-Mbit ferroelectric RAM (F-RAM) organized as 512K × 8, supporting quad SPI (QPI) up to 108 MHz SDR and 54 MHz DDR, with 100 trillion (10¹⁴) read/write endurance, 151-year data retention, and industrial temperature range (–40°C to +85°C). It serves as a high-speed non-volatile memory replacement for serial flash or EEPROM in real-time data logging, industrial control registers, and event-triggered storage where instant write and cycle longevity are critical.

For engineers reviewing the CY15B104QSN-108SXIT datasheet, CY15B104QSN-108SXIT pinout, CY15B104QSN-108SXIT application, or CY15B104QSN-108SXIT equivalent, key selection criteria include guaranteed non-volatile write at bus speed (no polling), on-die ECC for 1-bit correction per 8-byte unit, hardware WP pin support, dual/quad SPI protocol flexibility, and 1.8 V to 3.6 V single-supply operation.

Technical Context

The CY15B104QSN-108SXIT implements a true RAM-like interface over quad SPI, enabling execute-in-place (XIP) reads and immediate byte-level writes without erase cycles or latency penalties. Its ferroelectric memory array eliminates wear leveling and page programming overhead inherent in flash-based alternatives.

It integrates configurable status and configuration registers (SR1/SR2, CR1–CR5) to manage protection modes (TBPROT, BP2–BP0), latency tuning (MLC, RLC), QPI/DPI enablement, and deep power-down behavior (DPDPOR). CRC and ECC logic operate transparently during read/write sequences, reporting integrity errors via dedicated status bits.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (Small Outline Integrated Circuit), surface-mount, RoHS-compliant, industrial-grade thermal profile.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar non-volatile serial memory applications.

Compared with CY15B104QSN-108SXIT, the GQFN variant sacrifices manufacturability and thermal reliability for size, while the FM25V20A-G trades density, speed, and voltage flexibility for ultra-low static power - neither matches the original's combination of 4-Mbit capacity, 108 MHz QPI, and industrial SOIC robustness.

Availability

CY15B104QSN-108SXIT is available at Aetrix Electronics and suitable for industrial data loggers, smart meter firmware storage, and PLC configuration backup requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.

Supply support for CY15B104QSN-108SXIT 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 German semiconductor leader specializing in power systems, automotive ICs, and high-reliability memory solutions, with global manufacturing and quality certifications including ISO/TS 16949 and AEC-Q200.

This part belongs to the EXCELON™ Ultra F-RAM product line, engineered specifically for mission-critical industrial and metering applications demanding deterministic non-volatile write performance, extreme endurance, and extended data retention without battery backup.

FAQ

Does CY15B104QSN-108SXIT require external high-voltage programming or erase pulses?

No. Unlike EEPROM or flash, this F-RAM uses standard 1.8–3.6 V supply for all operations. Writes occur at bus speed with no erase cycle, no high-voltage pump, and no write latency - each byte is non-volatile immediately after successful SPI transfer.

Can the dedicated 256-byte special sector survive lead-free reflow soldering?

Yes. The special sector is qualified to retain data through up to three standard JEDEC J-STD-020 lead-free reflow profiles (peak 260°C), making it ideal for storing calibration constants or board-specific identifiers that must persist across manufacturing and repair.

Is quad SPI (QPI) mode enabled by default after power-up?

No. QPI mode must be explicitly enabled via the QPI bit (CR2[6]) in the configuration register. Default power-on state is standard single-I/O SPI mode (mode 0), ensuring backward compatibility with legacy host drivers until QPI is intentionally configured.

How does the on-die ECC interact with read-modify-write sequences?

ECC operates transparently on every 8-byte read; corrected data is delivered to the host without intervention. During write, ECC bits are auto-generated and stored alongside payload. No host-side ECC calculation or management is required - correction and reporting are fully hardware-managed.