Infineon Technologies CY15B016Q-SXE

Overview

CY15B016Q-SXE from Infineon Technologies (formerly Cypress) is a 16-Kbit (2K × 8) serial SPI F-RAM nonvolatile memory IC designed for automotive embedded systems requiring rapid, high-endurance writes. It operates at up to 16 MHz SPI clock speed, supports AEC-Q100 Grade 1 (–40 °C to +125 °C), and delivers NoDelay™ writes with 10¹³ read/write cycles and 121-year data retention.

For engineers reviewing the CY15B016Q-SXE datasheet, CY15B016Q-SXE pinout, CY15B016Q-SXE application, or CY15B016Q-SXE equivalent, key selection criteria include SPI mode 0/3 compatibility, hardware/software write protection, low active current (300 µA @ 1 MHz), SOIC-8 packaging, and drop-in replacement capability for serial EEPROM/flash in automotive control units, battery management, and ADAS sensor logging.

Technical Context

The CY15B016Q-SXE implements a ferroelectric memory array with zero write latency-data commits immediately after each byte transfer without polling or erase cycles. Its internal architecture includes a dedicated instruction decoder, address counter, and nonvolatile status register managing block protection and WP/SO/SI timing synchronization.

It functions as an SPI slave device with strict mode 0 (CPOL = 0, CPHA = 0) and mode 3 (CPOL = 1, CPHA = 1) compliance, supporting full-duplex communication via separate SI and SO pins, and features HOLD pin suspension for bus arbitration during critical host operations.

Key Specifications

Pinout & Package

Package: 8-pin Small Outline Integrated Circuit (SOIC), 150 mil width, 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 FM25V01A-G and AT25DF041A-MAU-T, CY15B016Q-SXE uniquely balances automotive qualification, ultra-high endurance, and true zero-latency writes in a compact 16-Kbit footprint-making it optimal for safety-critical, high-write-rate automotive data buffers where reliability and timing determinism are non-negotiable.

Availability

CY15B016Q-SXE is available at Aetrix Electronics and suitable for engine control units, battery management systems, ADAS sensor modules, and electric power steering controllers requiring stable component supply across extended automotive product lifecycles.

Supply support for CY15B016Q-SXE 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 systems, automotive MCUs, and reliable memory solutions for mission-critical applications.

CY15B016Q-SXE belongs to Infineon's F-RAM product line, engineered specifically for automotive subsystems demanding deterministic nonvolatile storage-replacing legacy EEPROM/flash where write speed, endurance, and temperature resilience are design constraints.

FAQ

Is CY15B016Q-SXE pin-compatible with standard SPI EEPROMs like the AT25040?

Yes-CY15B016Q-SXE uses an industry-standard 8-pin SOIC package with identical CS, SCK, SI, SO, WP, HOLD, VDD, and VSS pin assignments. Its SPI command set is backward-compatible with common EEPROM opcodes (e.g., WREN, READ, WRITE), enabling direct hardware replacement without PCB redesign.

Does CY15B016Q-SXE require external high-voltage programming circuitry?

No-unlike EEPROM or flash, CY15B016Q-SXE performs writes at standard VDD (3.0–3.6 V) with no charge pump or high-voltage generator. All write operations execute at bus speed using standard SPI signaling, eliminating complex power sequencing and reducing system BOM cost.

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

When HOLD is asserted low during a write, the CY15B016Q-SXE completes the current byte transfer, then suspends further activity. SCK and CS are ignored until HOLD returns high while SCK is low; the device resumes exactly where it left off, ensuring atomicity and data integrity across host interruptions.

Can CY15B016Q-SXE be used in SPI multi-slave configurations with shared SI/SO lines?

Yes-the device supports standard SPI multi-slave topology with individual CS lines. SI and SO are fully separated, allowing simultaneous connection to a single master's MOSI/MISO bus. No tri-state conflicts occur because SO is automatically high-impedance when CS is high or during writes.