Infineon Technologies CY15B102Q-SXA

Overview

CY15B102Q-SXA from Infineon Technologies (formerly Cypress) is a 2-Mbit (256K × 8) serial SPI F-RAM nonvolatile memory IC designed for automotive-A systems requiring frequent, low-latency writes. It delivers NoDelay™ writes at up to 40 MHz, 10¹⁴ read/write endurance, and 151-year data retention over –40 °C to +85 °C, serving as a hardware drop-in replacement for serial flash/EEPROM in real-time data logging.

For engineers reviewing the CY15B102Q-SXA datasheet, CY15B102Q-SXA pinout, CY15B102Q-SXA application, or CY15B102Q-SXA equivalent, key selection criteria include write latency independence from bus speed, absence of write polling, SPI mode 0/3 compatibility, and automotive-grade reliability without wear leveling overhead.

Technical Context

The CY15B102Q-SXA implements ferroelectric memory array architecture with synchronous SPI slave interface, eliminating erase-before-write cycles and enabling byte-level random access at full bus speed. Its internal logic includes dedicated instruction decoder, clock generator, and nonvolatile status register with WPEN-controlled hardware write protection.

It supports dual SPI modes (0 and 3), uses rising-edge input sampling and falling-edge output timing, and integrates HOLD functionality for transaction suspension without clock or CS dependency - all while maintaining tristate SO during inactive states and enforcing VDD-supplied default for unused WP/HOLD pins.

Key Specifications

Pinout & Package

8-pin Small Outline Integrated Circuit (SOIC) package with standard gull-wing leads, RoHS-compliant, 150 mil body width, and JEDEC MS-012AC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25DF021A-SSH-T and BR25H020FJ-WE2, the CY15B102Q-SXA uniquely eliminates write latency and endurance bottlenecks-making it the sole option for automotive subsystems demanding sub-microsecond write determinism and multi-decade data integrity without firmware overhead.

Availability

CY15B102Q-SXA is available at Aetrix Electronics and suitable for telematics event logging, ADAS sensor calibration storage, and ECU runtime variable capture requiring stable component supply across automotive production lifecycles.

Supply support for CY15B102Q-SXA 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 global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive MCUs, sensors, and memory solutions for industrial and transportation markets.

The CY15B102Q-SXA belongs to Infineon's F-RAM product line, engineered specifically for automotive and industrial applications where deterministic nonvolatile writes, extreme endurance, and zero-latency operation replace legacy flash/EEPROM limitations.

FAQ

Is CY15B102Q-SXA pin-compatible with standard 8-pin SOIC SPI flash devices?

Yes - CY15B102Q-SXA uses identical 8-pin SOIC (150 mil) mechanical dimensions and matches the industry-standard SPI pinout: CS, SCK, SI, SO, WP, HOLD, VSS, VDD. No PCB redesign is needed for drop-in replacement of serial flash or EEPROM in existing layouts, provided WP and HOLD are tied to VDD if unused.

Does CY15B102Q-SXA require external high-voltage programming or special write sequences?

No - CY15B102Q-SXA performs writes at standard VDD levels (2.0–3.6 V) with no charge pumps or high-voltage generators. After issuing WREN, any byte write proceeds immediately at bus speed; no erase, verify, or delay cycles are required. This eliminates complex driver code and timing margins associated with flash/EEPROM.

How does the HOLD pin behave during an active write operation?

When HOLD is pulled LOW during any memory operation (read, write, or status access), the device suspends the current transaction, ignores further SCK and CS edges, and holds SO in its last valid state. The operation resumes from the exact bit position upon HOLD returning HIGH while SCK remains LOW - preserving data integrity without restart overhead.

What SPI modes does CY15B102Q-SXA support, and how are they selected?

CY15B102Q-SXA natively supports SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1). Mode selection is automatic and determined solely by the master's clock polarity and phase configuration - no internal register setting or command is required. Both modes use rising-edge input sampling and falling-edge output driving.