Infineon Technologies CY15B104QSN-108SXI

Overview

CY15B104QSN-108SXI 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 and industrial control systems.

For engineers reviewing the CY15B104QSN-108SXI datasheet, CY15B104QSN-108SXI pinout, CY15B104QSN-108SXI application, or CY15B104QSN-108SXI equivalent, key selection criteria include instant write capability at bus speed, on-die ECC/CRC for data integrity, hardware/software write protection, and compatibility with SPI mode 0/3 across SDR/DDR protocols.

Technical Context

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

It integrates dual status registers (SR1/SR2), four configuration registers (CR1–CR4, CR5), and dedicated logic for CRC generation, ECC correction (1-bit), and error reporting (2-bit detection). The device supports programmable memory latency (MLC), output impedance (OI), and deep power-down activation on power-on reset (DPDPOR).

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY15B104QSN-108SXI, the -108SXIT offers identical functionality in tape format for SMT efficiency, while FM25V04-G trades performance and data integrity for cost and simplicity in non-demanding applications.

Availability

CY15B104QSN-108SXI is available at Aetrix Electronics and suitable for industrial data loggers, smart sensor nodes, PLC configuration storage, and medical diagnostic instruments requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.

Supply support for CY15B104QSN-108SXI 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 management, automotive ICs, and high-reliability memory solutions, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

CY15B104QSN belongs to the EXCELON™ Ultra F-RAM product line, engineered specifically for mission-critical industrial and medical applications demanding instant-write non-volatility, extreme endurance, and embedded data integrity features.

FAQ

Does CY15B104QSN-108SXI require external high-voltage programming or erase cycles?

No. Unlike serial flash or EEPROM, this F-RAM performs true byte-level writes at bus speed with no erase prerequisite, no programming voltage above VDD, and zero write latency. Each byte commits immediately upon successful SPI transfer - eliminating timeout polling, wear leveling, and block management overhead entirely.

Can CY15B104QSN-108SXI operate in quad SPI DDR mode with standard SPI controllers?

Yes, but only with controllers explicitly supporting DDR QPI commands and timing (e.g., Infineon XMC4000, NXP i.MX RT1060, or Microchip SAM E70). Standard single-data-rate SPI peripherals cannot interpret DDR QPI opcodes or manage the required 2x clock-aligned sampling; configuration requires CR2[6] (QPI enable) and CR1[7:4] (MLC) setup per datasheet Section 4.2.1.1.

How is the 256-byte special sector physically isolated from main memory?

The special sector resides in a separate ferroelectric capacitor array with distinct process tuning and layout hardening. It is accessed via dedicated commands (0x77/0x78), survives three JEDEC J-STD-020D reflow profiles (peak 260°C), and retains data independently - even if main array undergoes repeated cycling or power interruption during reflow.

What happens when a 2-bit error occurs in an 8-byte unit under ECC protection?

The on-die ECC logic detects the 2-bit error but does not correct it. Instead, it sets the "2-bit error detected" flag (ECC2) in Status Register 2 (SR2[1]), allowing host firmware to trigger error logging, data recovery from backup, or safe shutdown - preserving system-level fault containment without silent corruption.