Infineon Technologies CY15V104QN-50LPXI

Overview

CY15V104QN-50LPXI from Infineon is a 4-Mb serial ferroelectric RAM (F-RAM) organized as 512K × 8, operating on SPI interface at up to 50 MHz, with 1.71–1.89 V supply, 10¹⁵ write endurance, and 151-year data retention. It serves as nonvolatile memory in industrial data loggers where rapid, frequent writes and zero write latency are critical.

For engineers reviewing the CY15V104QN-50LPXI datasheet, CY15V104QN-50LPXI pinout, CY15V104QN-50LPXI application, or CY15V104QN-50LPXI equivalent, key selection criteria include guaranteed 50 MHz SPI timing, ultra-low deep power-down current (0.70 µA), hardware/software write protection, dedicated 256-byte reflow-survivable sector, and industrial –40°C to +85°C operation.

Technical Context

The CY15V104QN-50LPXI implements an SPI slave interface compliant with modes 0 and 3, supporting full-duplex read/write at bus speed without polling or write delay. Its F-RAM core eliminates erase cycles and enables byte-level writes with zero latency after each transferred byte.

It integrates a nonvolatile status register, Device ID (manufacturer + product ID), unique ID, 8-byte writable serial number, and a dedicated 256-byte special sector certified to survive three standard reflow soldering cycles - a feature absent in flash/EEPROM alternatives.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, surface-mount, standard footprint compatible with automated assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nonvolatile serial memory applications.

Compared with CY15B104QN-50LPXI and FM25V04-G, the CY15V104QN-50LPXI uniquely delivers 1.71–1.89 V operation, industrial temperature rating, and factory-programmable traceability - making it the sole choice for battery-powered, field-deployed industrial edge devices requiring guaranteed 151-year data retention.

Availability

CY15V104QN-50LPXI is available at Aetrix Electronics and suitable for industrial data loggers, smart energy meters, PLC I/O modules, and medical diagnostic sensor hubs requiring stable component supply across extended product lifecycles.

Supply support for CY15V104QN-50LPXI 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, sensing, security, and memory solutions for industrial, automotive, and IoT markets.

The EXCELON™ LP F-RAM product line targets high-reliability, low-power nonvolatile memory applications demanding extreme endurance and instant write capability - especially where flash/EEPROM limitations cause system-level bottlenecks.

FAQ

Is CY15V104QN-50LPXI pin-compatible with standard SPI EEPROMs or flash devices?

Yes - it uses the industry-standard 8-pin SOIC package and SPI command set (Read, Write, WREN, WRDI, RDSR, WRSR) with identical pin functions (CS, SCK, SI, SO, WP, VDD, VSS). No PCB redesign is needed when replacing legacy serial nonvolatile memory, though firmware may require minor updates to leverage zero-latency writes.

Does the 256-byte special sector require special initialization or access commands?

No - it is accessed using standard Read and Write opcodes (0x03 and 0x02) with addresses 0x7F000–0x7F0FF. Unlike main array writes, special sector writes retain data through three Pb-free reflow cycles without additional programming steps or voltage conditioning.

Can the unique ID and serial number be read and written during normal operation?

The unique ID is factory-programmed, read-only, and accessible via opcode 0xAB. The 8-byte serial number is user-writable using opcode 0x1B and readable via 0x1C - both operate independently of main array access and require no write-enable sequence.

What is the impact of using WP pin tied to VDD versus grounded?

When WP is tied to VDD, hardware write protection is disabled - all software-based protections (status register bits, block locks) remain functional. When WP is pulled LOW and WPEN=1 in status register, writes to status register are blocked regardless of software commands, adding fail-safe protection against firmware corruption.