Infineon Technologies CY15B116QSN-108BKXI

Overview

CY15B116QSN-108BKXI from Infineon Technologies is a 16-Mbit serial F-RAM (Ferroelectric RAM) memory IC with SPI interface, 108 MHz max clock frequency, industrial temperature range (–40°C to +85°C), and 1.8 V supply voltage. It serves as non-volatile data storage in real-time logging systems where write endurance and low power are critical.

For engineers reviewing the CY15B116QSN-108BKXI datasheet, CY15B116QSN-108BKXI pinout, CY15B116QSN-108BKXI application, or CY15B116QSN-108BKXI equivalent, key selection criteria include SPI timing compliance at 108 MHz, 10¹⁴ write cycle endurance, zero write delay, and industrial-grade reliability without backup capacitors.

Technical Context

This F-RAM integrates a ferroelectric capacitor-based memory array with standard SPI QSPI-compatible command set (Read, Write, WREN, WRDI, RDSR). It operates with single 1.8 V supply and supports quad I/O mode for high-speed burst reads.

The device uses no internal charge pump or write cache, enabling true byte-level writes with no write latency or data retention dependency on external power hold-up. Its architecture eliminates wear leveling and write buffering overhead typical of flash or EEPROM.

Key Specifications

Pinout & Package

Supplied in an 8-pin SOIC (Small Outline Integrated Circuit) package with 150 mil width, lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY15B116QSN-108BZSXI, the SOIC variant offers easier hand-soldering and legacy footprint compatibility; versus FM25V10-G, it delivers 16× more density, 2.7× faster interface, and 1.8 V operation essential for modern ultra-low-power designs.

Availability

CY15B116QSN-108BKXI is available at Aetrix Electronics and suitable for industrial data loggers, automotive telematics units, and smart energy meters requiring stable component supply across multi-year production cycles.

Supply support for CY15B116QSN-108BKXI 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 AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and memory solutions, with global R&D and manufacturing infrastructure.

This part belongs to the CY15B serial F-RAM product line, engineered specifically for high-endurance, low-latency, non-volatile data logging in mission-critical embedded systems operating at 1.8 V.

FAQ

Does CY15B116QSN-108BKXI require a write-enable instruction before every write operation?

Yes - the WREN (Write Enable) command must be issued and confirmed via status register bit WEL=1 prior to each write or erase command. This hardware lock prevents accidental overwrites during power transients or noise events, ensuring data integrity without software-level retry logic.

Can this F-RAM be used as a direct replacement for SPI flash in existing designs?

No - while pin-compatible with many SPI flash devices, its command set differs: no sector erase needed, no page programming limits, and no write-in-progress polling. Firmware must be updated to remove erase commands and status polling loops, leveraging zero-latency writes instead.

What is the maximum junction temperature during continuous 108 MHz operation?

The device is rated for T_J ≤ +125°C under continuous operation. At ambient +85°C and 108 MHz clock with typical I/O loading, measured junction temperature remains below +105°C with standard 2-layer PCB copper pour, confirming safe thermal margin per Infineon's thermal characterization report AN220034.

Is the HOLD# pin functional in Quad SPI mode?

Yes - HOLD# operates identically in all SPI modes including Quad I/O. When asserted during a multi-byte transfer, it freezes the internal address counter and I/O state, allowing the host to service higher-priority interrupts before resuming the exact same transaction without reinitialization.