Infineon Technologies CY15E064Q-SXET

Overview

CY15E064Q-SXET from Infineon Technologies (formerly Cypress) is a 64-Kbit (8K × 8) serial SPI F-RAM nonvolatile memory IC with automotive-grade qualification, operating from –40 °C to +125 °C, supporting up to 16 MHz SPI clock, 10¹³ read/write endurance, and NoDelay™ write capability. It serves as a hardware-compatible replacement for serial EEPROM/flash in real-time data logging and control systems requiring rapid, reliable nonvolatile storage.

For engineers reviewing the CY15E064Q-SXET datasheet, CY15E064Q-SXET pinout, CY15E064Q-SXET application, or CY15E064Q-SXET equivalent, key selection criteria include AEC-Q100 Grade 1 compliance, zero-write-latency operation, 121-year data retention at +85 °C, SPI Mode 0/3 support, and SOIC-8 packaging with WP/HOLD pins for robust system-level write protection.

Technical Context

The CY15E064Q-SXET implements a ferroelectric memory array with direct byte-addressable SPI interface, eliminating internal write cycles and polling requirements. Its architecture delivers immediate data commit upon byte transfer completion, enabling deterministic timing for time-critical writes.

It integrates on-die status register with software-configurable block protection (1/4, 1/2, or full array), hardware write protection via active-low WP pin, and HOLD pin for transaction suspension without clock or CS dependency - all guaranteed across the automotive-e temperature range.

Key Specifications

Pinout & Package

8-pin Small Outline Integrated Circuit (SOIC) package with standard 150-mil body width and 1.27-mm pitch - compatible with automated PCB assembly and legacy footprint designs.

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 MB85RS64VPF-G-JNERE1, CY15E064Q-SXET uniquely combines 5V operation, AEC-Q100 Grade 1 rating, and true zero-latency writes - making it the only option for safety-critical, high-write-frequency automotive control nodes.

Availability

CY15E064Q-SXET is available at Aetrix Electronics and suitable for engine control units, ADAS event recorders, and electric power steering fault history loggers requiring stable component supply across extended automotive product lifecycles.

Supply support for CY15E064Q-SXET 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 electronics, and security solutions - with annual revenue exceeding €14 billion and presence in 35+ countries.

CY15E064Q-SXET belongs to Infineon's automotive F-RAM product line, engineered specifically for mission-critical nonvolatile data storage in harsh-temperature environments where flash and EEPROM reliability limits constrain system design.

FAQ

Is CY15E064Q-SXET pin-compatible with standard 8-pin SOIC serial EEPROMs?

Yes - CY15E064Q-SXET uses identical SOIC-8 pinout (CS, SCK, SI, SO, WP, HOLD, VSS, VDD) and supports SPI Mode 0/3, enabling drop-in replacement for devices like AT25040B or M95040 without PCB redesign. However, WP and HOLD functions differ in behavior and must be verified against target EEPROM's datasheet.

Does CY15E064Q-SXET require external high-voltage programming circuitry?

No - unlike EEPROM or flash, CY15E064Q-SXET performs writes at standard VDD (4.5–5.5 V) with no charge pump or high-voltage generator. All operations execute at bus speed using standard SPI signaling, eliminating need for external voltage boosters or complex timing control.

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

When HOLD is pulled LOW during any SPI transaction (read, write, or status access), the CY15E064Q-SXET immediately suspends the operation, ignores further SCK edges and CS transitions, and holds SO in high-impedance state. The transaction resumes from the exact bit position when HOLD returns HIGH while SCK is LOW - preserving data integrity without restart overhead.

What is the maximum sustained write throughput achievable with CY15E064Q-SXET?

At 16 MHz SPI clock with optimal command sequencing (no inter-byte delays), CY15E064Q-SXET achieves 2 MB/s effective write throughput - limited only by master controller's SPI peripheral speed and software overhead. Each byte writes deterministically in ≤62.5 ns, enabling continuous streaming into sequential addresses without gaps or retries.