Infineon Technologies CY15B108QN-20LPXC

Overview

CY15B108QN-20LPXC from Infineon is an 8-Mbit serial ferroelectric RAM (F-RAM) organized as 1024K × 8, operating over SPI at up to 50 MHz with 1.8 V–3.6 V supply, industrial temperature range (−40°C to +85°C), and 10¹⁵ read/write endurance - deployed in real-time data logging systems requiring deterministic non-volatile writes without write latency.

For engineers reviewing the CY15B108QN-20LPXC datasheet, CY15B108QN-20LPXC pinout, CY15B108QN-20LPXC application, or CY15B108QN-20LPXC equivalent, this page delivers verified technical context, SPI timing behavior, endurance-backed reliability metrics, and drop-in replacement guidance versus serial EEPROM/flash in high-cycle data capture systems.

Technical Context

The CY15B108QN-20LPXC implements a true SPI slave interface compliant with Modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1), supporting continuous clocking up to 50 MHz with zero write latency - data commits immediately after byte transfer without polling. Its internal architecture includes a 1024K × 8 main F-RAM array plus a dedicated 256-byte special sector that survives three reflow cycles.

It integrates a non-volatile status register with hardware write protection (WP pin), software write disable (WRDI), and configurable block protection (1/4, 1/2, or full array). Device identification includes manufacturer ID, product ID, unique device ID, and user-writable 8-byte serial number registers - all accessible via standardized SPI opcodes.

Key Specifications

Pinout & Package

Package: 24-ball fine-pitch ball grid array (FBGA), 4.0 mm × 4.0 mm × 0.75 mm, RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY15B108QSN-20LPXC, the -20LPXC offers superior MSL1 handling for standard SMT lines; versus AT45DB081E, it delivers 10¹⁰× higher endurance and eliminates write latency - making it essential for deterministic real-time data capture.

Availability

CY15B108QN-20LPXC is available at Aetrix Electronics and suitable for industrial data loggers, smart metering systems, and automotive body control modules requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for CY15B108QN-20LPXC 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, connectivity, and memory solutions for industrial, automotive, and IoT markets.

The EXCELON™ LP F-RAM product line targets applications demanding ultra-high endurance, instant non-volatile writes, and low-power operation - replacing legacy serial EEPROM and flash in mission-critical data logging.

FAQ

Is CY15B108QN-20LPXC pin-compatible with standard SPI serial flash devices?

Yes - it uses the same 24-ball FBGA footprint and 4-wire SPI interface (CS, SCK, SI, SO) as common 8-Mbit serial flash parts, enabling direct PCB-level replacement without layout changes. However, WP and HOLD pins are repurposed: WP enables hardware write protection, and there is no HOLD function - design must omit HOLD pull-up if migrating from flash.

Does CY15B108QN-20LPXC require external high-voltage programming or erase pulses?

No - unlike serial flash or EEPROM, it performs writes at standard VDD levels (1.8–3.6 V) with no erase cycle, no high-voltage pump, and no program/erase latency. Each byte writes instantly upon SPI clock completion, eliminating firmware delays and complexity associated with flash wear leveling or EEPROM page management.

What is the significance of the 256-byte special sector in CY15B108QN-20LPXC?

This dedicated F-RAM region retains data through up to three standard Pb-free reflow soldering cycles (JEDEC J-STD-020), making it ideal for storing factory-calibrated parameters, board-specific identifiers, or cryptographic keys that must survive PCB assembly - unlike main array data, which may be exposed to thermal stress during rework.

How does the 151-year data retention specification apply under real-world conditions?

The 151-year figure is measured at +85°C per JEDEC JESD22-A117; at +25°C, retention exceeds 1000 years. This is enabled by ferroelectric capacitor stability - no charge leakage mechanism exists, so data integrity remains unaffected by temperature cycling, radiation, or power loss, unlike floating-gate memories.