Infineon Technologies CY15B102QN-50SXE

Overview

CY15B102QN-50SXE from Infineon is an automotive-grade 2 Mb serial ferroelectric RAM (F-RAM) organized as 256K × 8, operating over SPI at up to 50 MHz, with 10¹³ write endurance, 121-year data retention, and −40°C to +125°C operation. It serves as a nonvolatile memory replacement for EEPROM/flash in real-time data logging and control systems where rapid, reliable byte-level writes are critical.

For engineers reviewing the CY15B102QN-50SXE datasheet, CY15B102QN-50SXE pinout, CY15B102QN-50SXE application, or CY15B102QN-50SXE equivalent, key selection criteria include SPI mode 0/3 compatibility, hardware/software write protection, dedicated 256-byte special sector, low-power Deep Power Down (1.1 µA), and AEC-Q100 Grade 1 qualification for automotive ECUs.

Technical Context

The CY15B102QN-50SXE implements a true RAM-like interface over SPI: writes complete at bus speed with zero latency-no polling or erase cycles required. Its ferroelectric memory array eliminates wear leveling and page programming overhead inherent in flash and EEPROM.

It integrates a nonvolatile status register, Device ID (manufacturer + product ID), unique ID, and writable 8-byte serial number. The dedicated 256-byte special sector survives up to three standard reflow soldering cycles, enabling board-level traceability without post-manufacture programming.

Key Specifications

Pinout & Package

8-pin Small Outline Integrated Circuit (SOIC) package, RoHS-compliant, surface-mountable with standard reflow profile.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nonvolatile serial memory applications.

Compared with CY15B102QN-50SXE, the CY15B102QSN-50SXE is functionally identical, while the AT25DF041A-SSH-T trades write speed and endurance for higher density and lower cost-making it viable only for infrequently updated firmware, not real-time logging.

Availability

CY15B102QN-50SXE is available at Aetrix Electronics and suitable for automotive engine control units, ADAS sensor modules, electric vehicle battery management systems, and telematics control units requiring stable component supply across extended product lifecycles.

Supply support for CY15B102QN-50SXE 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 manufacturer specializing in power management, automotive ICs, and security solutions, with global manufacturing and automotive qualification expertise.

The EXCELON™ Auto F-RAM product line targets mission-critical automotive memory applications demanding zero-latency nonvolatility, extreme endurance, and AEC-Q100 Grade 1 reliability-specifically replacing EEPROM and flash in ECU, BMS, and ADAS subsystems.

FAQ

Is CY15B102QN-50SXE pin-compatible with standard SPI EEPROMs like the 25AA040A?

Yes-it uses the industry-standard 8-pin SOIC footprint and SPI command set (Read, Write, WREN, WRDI, RDSR), enabling drop-in replacement without PCB redesign. However, unlike EEPROM, it requires no write-enable polling and supports faster clock rates up to 50 MHz.

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

No-this sector is pre-mapped and accessible using standard READ and WRITE opcodes (0x03/0x02) with address range 0x3F000–0x3F0FF. It operates identically to main array but retains data through reflow; no enable sequence or status bit is needed.

How does the WP pin interact with software write protection settings?

When WPEN = 1 in the status register, the WP pin becomes active: pulling WP LOW disables all status register writes-including changes to BP bits. This hardware lock ensures configuration integrity even if firmware is compromised or incorrectly initialized.

Can CY15B102QN-50SXE operate reliably at 1.8 V while running at 50 MHz SPI speed?

Yes-the datasheet specifies full 50 MHz operation down to VDD = 1.8 V. At this voltage, active current is 3.7 mA (typ), and timing parameters including t_SHSL (CS hold after SCK) and t_DISO (SO disable delay) remain within spec, ensuring robust communication with 1.8 V microcontrollers.