Infineon Technologies CY15B108QN20BFXITXUMA1

Overview

CY15B108QN20BFXITXUMA1 from Infineon is an 8 Mb serial ferroelectric RAM (F-RAM) organized as 1024K × 8, operating over SPI at up to 40 MHz with 1.8 V–3.6 V supply, 10¹⁵ write endurance, and 151-year data retention. It serves as a non-volatile memory replacement for EEPROM/flash in high-write-cycle industrial data loggers, sensor nodes, and metering systems where instant write and low power are critical.

For engineers reviewing the CY15B108QN20BFXITXUMA1 datasheet, CY15B108QN20BFXITXUMA1 pinout, CY15B108QN20BFXITXUMA1 application, or CY15B108QN20BFXITXUMA1 equivalent, this page delivers verified electrical specs, SOIC-8 pin mapping, real-world use cases, and validated drop-in alternatives for rapid BOM evaluation and design-in.

Technical Context

The CY15B108QN20BFXITXUMA1 implements a true SPI slave interface supporting modes 0 and 3, with zero-latency writes-no polling required-and full bus-speed data transfer. Its internal architecture includes a 1024K × 8 F-RAM array, a dedicated 256-byte special sector surviving three reflow cycles, and dual write protection (hardware WP pin + software WRDI/block lock).

It integrates non-volatile Device ID and serial number registers, a status register with WPEN bit, and four low-power states: standby (3.5 µA), deep power-down (0.90 µA), and hibernate (0.1 µA). The device operates across –40°C to +85°C and supports standard SPI opcodes for read/write, status access, and identification commands.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, surface-mount, 150 mil width.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY15B108QN20BFXITXUMA1, the SD20XIT variant offers identical functionality in alternate packaging, while FM25V05-G trades density and advanced features for lower unit cost in simpler designs-making the CY15B108QN optimal for high-integrity, high-write industrial logging.

Availability

CY15B108QN20BFXITXUMA1 is available at Aetrix Electronics and suitable for industrial data loggers, smart energy meters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for CY15B108QN20BFXITXUMA1 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, and security solutions for automotive, industrial, and IoT markets.

This part belongs to the EXCELON™ LP F-RAM product line, engineered specifically for high-endurance, low-latency non-volatile storage in mission-critical industrial and automotive systems where flash and EEPROM fall short.

FAQ

Is CY15B108QN20BFXITXUMA1 pin-compatible with standard SPI EEPROMs or flash devices?

Yes-it uses industry-standard SOIC-8 pinout (CS, SCK, SI, SO, WP, VSS, VDD, DNU) matching common 8-Mb serial flash and EEPROM packages. No PCB redesign is needed for drop-in replacement, though firmware must disable flash-specific commands (e.g., WREN, WRDI polling) and enable F-RAM's instant-write behavior.

Does the "20BFXITXUMA1" suffix indicate a specific temperature grade or reliability screening?

Yes-the "20" denotes 20 MHz maximum SPI speed rating (though the device supports up to 40 MHz), "BFXI" indicates industrial temperature range (–40°C to +85°C) and SOIC-8 packaging, and "TXUMA1" is Infineon's tape-and-reel ordering code for 1000-unit reels with moisture sensitivity level 3 handling.

Can the WP pin be left unconnected, or must it be tied high?

WP must be tied to VDD if not actively used. Leaving it floating risks unintended write protection activation due to noise or leakage, which would block status register updates and render software write-lock features inoperable-potentially bricking configuration in field units.

What is the purpose of the DNU pin, and is it safe to route it to ground?

DNU (Do Not Use) has no internal connection and must remain unconnected or tied to VDD. Routing it to ground violates Infineon's design rules and may cause excessive current draw or latch-up in rare cases; the datasheet explicitly prohibits grounding this pin.