Infineon Technologies CY15B064Q-SXE

Overview

CY15B064Q-SXE from Infineon Technologies (formerly Cypress) is an automotive-grade 64-Kbit serial SPI F-RAM with 8K × 8 organization, AEC-Q100 Grade 1 qualification (–40 °C to +125 °C), 10¹³ write endurance, and NoDelay™ write capability. It replaces serial flash/EEPROM in real-time data logging, engine control unit parameter storage, and ADAS sensor calibration where rapid nonvolatile writes are critical.

For engineers reviewing the CY15B064Q-SXE datasheet, CY15B064Q-SXE pinout, CY15B064Q-SXE application, or CY15B064Q-SXE equivalent, key selection criteria include guaranteed 16 MHz SPI operation, hardware/software write protection, 3.0–3.6 V supply compatibility, and automotive temperature compliance without refresh or polling overhead.

Technical Context

The CY15B064Q-SXE implements a ferroelectric memory array accessed via standard SPI Mode 0 (0,0) and Mode 3 (1,1), with zero-latency writes enabled by intrinsic nonvolatile cell physics - no internal write cycle or erase step required. All operations complete within bus timing, eliminating status polling.

Its on-die control logic integrates a 3-bit "don't care" address mask, 8-bit opcode decoder, and nonvolatile status register with WPEN bit for hardware write protection. The HOLD pin enables deterministic transaction suspension without clock or CS dependency, supporting time-critical host interrupt handling.

Key Specifications

Pinout & Package

8-pin small outline integrated circuit (SOIC) package with gull-wing leads, RoHS-compliant, 150 mil body width, JEDEC MS-012AC compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25DF041A-SSH-T and BR24G64FJ-WE2, CY15B064Q-SXE uniquely delivers automotive-grade temperature operation, 10-million-fold higher endurance, and true zero-latency writes - making it the only viable option for ASIL-B–rated real-time data capture in powertrain and ADAS domains.

Availability

CY15B064Q-SXE is available at Aetrix Electronics and suitable for engine control units, ADAS calibration systems, and telematics event loggers requiring stable component supply across extended automotive production lifecycles.

Supply support for CY15B064Q-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 management, automotive microcontrollers, and memory solutions for industrial and transportation markets.

CY15B064Q-SXE belongs to Infineon's automotive F-RAM product line, engineered specifically to replace legacy serial flash and EEPROM in safety-critical, high-write-frequency automotive subsystems where reliability and timing determinism are mandatory.

FAQ

Is CY15B064Q-SXE pin-compatible with standard 8-pin SOIC SPI flash or EEPROM devices?

Yes - CY15B064Q-SXE uses identical 8-pin SOIC footprint and SPI pin assignments (CS, SCK, SI, SO, WP, HOLD, VDD, VSS) as industry-standard serial flash and EEPROM. No PCB redesign is needed for drop-in replacement, though firmware must disable polling loops due to NoDelay™ writes.

Does CY15B064Q-SXE require special initialization or configuration after power-up?

No - the device operates immediately after VDD stabilizes and CS is asserted. The status register defaults to WPEN = 0 (software write protection disabled) and block protection bits cleared. Hardware write protection via WP pin is active only if externally pulled LOW and WPEN is set in the status register.

Can the HOLD pin be used during a write operation without corrupting data?

Yes - asserting HOLD LOW during any active SPI transaction (read or write) suspends the operation atomically. When HOLD returns HIGH while SCK is LOW, the device resumes exactly where it left off. No data corruption occurs, and no retransmission is required - critical for deterministic interrupt handling in AUTOSAR OS environments.

What is the maximum achievable write throughput for sequential byte writes?

At 16 MHz SPI clock, each byte write requires one opcode (1 byte) + two address bytes + one data byte = 4 bytes × 8 clocks = 32 clock cycles = 2 µs. With no inter-byte delay, sustained throughput reaches 500 KB/s - limited only by host MCU SPI peripheral bandwidth and command overhead, not device internal timing.