Infineon Technologies CY15E064J-SXET

Overview

CY15E064J-SXET from Cypress Semiconductor is a 64-Kbit (8K × 8) automotive-grade serial F-RAM with I²C interface, operating from 4.5 V to 5.5 V over –40 °C to +85 °C. It delivers NoDelay™ writes, 10¹⁴ read/write endurance, and 151-year data retention-enabling reliable nonvolatile logging in engine control units, ADAS sensor buffers, and vehicle telematics black boxes.

For engineers reviewing the CY15E064J-SXET datasheet, CY15E064J-SXET pinout, CY15E064J-SXET application, or CY15E064J-SXET equivalent, key selection criteria include I²C bus compatibility at 1 MHz, write-protection via WP pin, SOIC-8 packaging for automotive PCB layouts, and absence of write polling overhead in real-time firmware.

Technical Context

The CY15E064J-SXET implements a ferroelectric memory array organized as 8,192 × 8 bits, accessed via standard two-wire I²C protocol with slave address 0xA0–0xA7 (R/W bit dependent). It supports legacy timing modes (100 kHz/400 kHz) and full-speed 1-MHz operation without timing violations.

Its control logic eliminates EEPROM-style write latency: each byte is committed immediately upon successful I²C ACK, enabling back-to-back transactions. The internal address latch auto-increments during sequential reads/writes, and the WP pin provides hardware-level write protection across the full 8K address space.

Key Specifications

Pinout & Package

8-pin Small Outline Integrated Circuit (SOIC) package, surface-mount, RoHS-compliant, 150-mil body width.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C64D-SSHM-T, CY15E064J-SXET eliminates write latency and extends endurance by 100,000×; versus FM24V06-G, it adds AEC-Q100 Class 2 qualification and tighter VDD tolerance (4.5–5.5 V), making it the sole drop-in solution for production automotive ECUs.

Availability

CY15E064J-SXET is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, and telematics event loggers requiring stable component supply across multi-year automotive production programs.

Supply support for CY15E064J-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

Cypress Semiconductor (now part of Infineon Technologies) designs high-reliability semiconductor solutions for automotive, industrial, and IoT markets, with deep expertise in nonvolatile memory and programmable systems.

The CY15E series targets automotive-grade F-RAM applications demanding deterministic write performance, extreme endurance, and AEC-Q100 compliance-specifically replacing EEPROM in safety-critical and high-write-frequency subsystems.

FAQ

Is CY15E064J-SXET pin-compatible with standard 8-pin I²C EEPROMs like AT24C64?

Yes-CY15E064J-SXET uses identical SOIC-8 pinout, I²C slave addressing (0xA0–0xA7), and command protocol as AT24C64-series EEPROMs. No PCB redesign or firmware rework is needed beyond disabling EEPROM write-polling routines due to NoDelay™ operation.

Does CY15E064J-SXET require external high-voltage circuitry for writes like EEPROM?

No-F-RAM technology uses ferroelectric capacitors switched at core VDD levels; no internal charge pump or elevated voltage generator is required. This eliminates voltage spikes, reduces EMI, and enables true single-supply 4.5–5.5 V operation without auxiliary power rails.

What is the maximum supported I²C clock frequency, and does it affect data retention?

The device supports up to 1 MHz I²C clock with guaranteed timing margins across –40 °C to +85 °C. Data retention (151 years at +85 °C) is independent of interface speed-it depends solely on ferroelectric material stability and is specified under worst-case thermal stress conditions.

How does the WP pin behave during power-up or brown-out conditions?

WP is internally pulled down, so memory is write-enabled by default at power-on reset. During brown-out, the internal pull-down ensures write protection remains inactive unless externally tied to VDD-preventing partial writes or corruption during unstable supply conditions.