Infineon Technologies CY15V108QN-40LPXI

Overview

CY15V108QN-40LPXI from Infineon is an 8-Mbit serial ferroelectric RAM (F-RAM) organized as 1024K × 8, operating at up to 50 MHz SPI clock, with 1.71–1.89 V supply, -40°C to +85°C industrial temperature range, and 10¹⁵ read/write endurance. It serves as a non-volatile memory replacement for serial EEPROM/flash in data logging, industrial control, and metering systems requiring instant write, zero latency, and high reliability.

For engineers reviewing the CY15V108QN-40LPXI datasheet, CY15V108QN-40LPXI pinout, CY15V108QN-40LPXI application, or CY15V108QN-40LPXI equivalent, this device delivers bus-speed writes without polling, 151-year data retention, hardware/software write protection, dedicated 256-byte reflow-survivable sector, and SPI Mode 0/3 compatibility - critical for deterministic real-time storage in embedded systems.

Technical Context

The CY15V108QN-40LPXI implements a true SPI slave interface with zero-write-latency F-RAM core, eliminating erase cycles and polling overhead. Its internal architecture includes a 1024K × 8 main array, 256-byte special sector, non-volatile status register, Device ID/Serial Number registers, and instruction decoder supporting Write Enable, Read, Write, and Low Power Mode commands.

It supports dual SPI modes (0 and 3), uses rising-edge sampling on SI and falling-edge output on SO, and features hardware write protection via active-low WP pin plus software-controlled block protection (1/4, 1/2, or full array). The device enters tristate output and low-power standby when CS is HIGH.

Key Specifications

Pinout & Package

Package: 24-ball fine-pitch ball grid array (24-ball FBGA), 6 mm × 8 mm, 0.8 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY15B108QN-40LPXI, the CY15V108QN-40LPXI trades voltage flexibility for tighter 1.71–1.89 V optimization - ideal for next-gen ultra-low-power SoCs. Versus FM25V05-G, it doubles density, adds 256-byte special sector, and improves speed/endurance - justifying FBGA adoption in new industrial platforms.

Availability

CY15V108QN-40LPXI is available at Aetrix Electronics and suitable for industrial data logging, smart metering, factory automation controllers, and medical diagnostic devices requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for CY15V108QN-40LPXI 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, security solutions, and high-reliability memory technologies.

This device belongs to the EXCELON™ LP F-RAM product line, engineered specifically for deterministic, high-endurance non-volatile storage in industrial and metering applications where flash/EEPROM limitations cause system-level reliability risks.

FAQ

Is CY15V108QN-40LPXI a direct hardware replacement for serial EEPROM or flash?

Yes - it uses standard SPI pins (CS, SCK, SI, SO, WP) and supports identical command sets for read/write/status operations. No PCB redesign is needed beyond verifying 1.71–1.89 V supply compatibility and updating firmware to remove polling loops, as writes complete instantly at bus speed.

What is the purpose of the 256-byte special sector?

This dedicated F-RAM sector retains data through up to three standard lead-free reflow soldering cycles (260°C peak). It is used to store factory-programmed calibration data, board serial numbers, or security keys that must survive PCBA manufacturing - unlike main array data which may be erased during rework.

How does write protection work on CY15V108QN-40LPXI?

It combines hardware and software methods: the WP pin disables Status Register writes when WPEN=1, while software block protection (via BP0/BP1 bits) locks 1/4, 1/2, or full memory. Both mechanisms must be configured correctly - WP must be tied to VDD if unused, and WRDI instruction must precede any Status Register change.

Does CY15V108QN-40LPXI require external high-voltage programming?

No - unlike EEPROM or flash, it performs all writes at standard VDD (1.71–1.89 V) with no charge pumps or elevated voltages. This eliminates EMI noise, reduces power supply complexity, and avoids voltage-related timing constraints, enabling simpler, more robust system design.