Infineon Technologies CY15B108QN-50BKXQ

Overview

CY15B108QN-50BKXQ from Infineon is an 8-Mbit serial ferroelectric RAM (F-RAM) organized as 1024K × 8, operating at up to 50 MHz SPI clock rate with 1.8 V–3.6 V supply voltage and extended industrial temperature range (−40°C to +105°C). It delivers instant non-volatile writes, 10¹⁴ read/write endurance, and 151-year data retention-enabling reliable logging in battery-constrained industrial controllers.

For engineers reviewing the CY15B108QN-50BKXQ datasheet, CY15B108QN-50BKXQ pinout, CY15B108QN-50BKXQ application, or CY15B108QN-50BKXQ equivalent, key selection criteria include SPI Mode 0/3 compatibility, hardware/software write protection, dedicated 256-byte reflow-survivable sector, low 1.10 µA deep power-down current, and FBGA-24 package integration for high-density PCBs.

Technical Context

The CY15B108QN implements a true byte-addressable, bus-speed non-volatile memory architecture using ferroelectric capacitor cells-eliminating write latency and polling overhead inherent in flash/EEPROM. Its SPI interface operates synchronously with zero wait states, supporting full-duplex transfers at up to 50 MHz across Modes 0 and 3.

Internal logic includes a non-volatile status register with WPEN control, device ID and serial number registers, and a dedicated 256-byte special sector validated for survival through three standard reflow cycles. Write protection is enforced via both hardware (WP pin) and software (WRDI instruction, block-level bits), ensuring robust data integrity in mission-critical logging.

Key Specifications

Pinout & Package

Package: 24-ball fine-pitch ball grid array (FBGA), 6 mm × 8 mm, 0.8 mm pitch, RoHS-compliant, designed for automated SMT assembly and thermal reliability in high-vibration environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY15B108QN-50BKXQ, the CY15B108QN-40ZSXI trades speed and package for through-hole compatibility, while the AT25SF041B-MAHB-T sacrifices endurance and latency for lower unit cost-making the BKXQ variant optimal for high-integrity, high-frequency write applications where reliability outweighs BOM cost.

Availability

CY15B108QN-50BKXQ is available at Aetrix Electronics and suitable for industrial data loggers, automotive telematics units, and medical infusion pumps requiring stable component supply, long-term lifecycle support, and guaranteed FBGA-24 sourcing.

Supply support for CY15B108QN-50BKXQ 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 non-volatile memory solutions for industrial, automotive, and IoT markets.

The EXCELON™ LP F-RAM product line targets high-reliability, low-power, frequent-write applications-replacing legacy EEPROM and flash where write latency, endurance, or data retention are system-critical constraints.

FAQ

Is CY15B108QN-50BKXQ pin-compatible with standard SPI flash or EEPROM devices?

No-it shares the same 4-wire SPI interface (CS, SCK, SI, SO) and command set structure, but uses a 24-ball FBGA package incompatible with common 8-pin SOIC or WSON footprints. Board redesign is required for migration, though firmware changes are minimal due to identical opcode mapping for read/write/status commands.

Does the dedicated 256-byte special sector require separate addressing or initialization?

No-the special sector resides at fixed address 0xFF0000–0xFF00FF and is accessed using standard READ/WRITE opcodes. It requires no initialization or configuration; its reflow survivability is inherent to the ferroelectric cell design and wafer-level process, not firmware-controlled.

How does write protection behave when both WP pin and Status Register bits are active?

Hardware WP takes precedence: when WP is pulled low and WPEN = 1 in the Status Register, all Status Register writes-including block protection bits-are blocked regardless of software commands. This hierarchical enforcement ensures failsafe protection against firmware bugs or memory corruption.

Can CY15B108QN-50BKXQ operate reliably at 1.8 V while running at 50 MHz?

Yes-datasheet Section 6 specifies full 50 MHz operation down to 1.8 V (VDD min), with timing parameters fully characterized. At 1.8 V, active current is 4.8 mA (typ), meeting all AC and DC specifications without derating, enabling single-supply 1.8 V SoC integration.