Infineon Technologies CY15E064J-SXE

Overview

CY15E064J-SXE from Cypress Semiconductor is a 64-Kbit (8K × 8) serial I²C automotive-grade F-RAM nonvolatile memory with NoDelay™ write capability, 100 trillion (10¹⁴) read/write endurance, and guaranteed operation from –40 °C to +85 °C. It serves as a hardware-compatible replacement for I²C EEPROM in data-logging and real-time control systems requiring rapid, frequent writes without polling.

For engineers reviewing the CY15E064J-SXE datasheet, CY15E064J-SXE pinout, CY15E064J-SXE application, or CY15E064J-SXE equivalent, key selection criteria include its 1-MHz I²C interface speed, 4.5–5.5 V supply range, 151-year data retention, WP-controlled write protection, and SOIC-8 automotive-A qualification.

Technical Context

The CY15E064J-SXE implements a ferroelectric memory array organized as 8,192 × 8 bits, accessed via standard two-wire I²C protocol with slave address 1010b plus 3-bit device select (A2–A0). It supports legacy I²C timings (100 kHz/400 kHz) and full-speed 1-MHz operation, with no internal write cycle delay - data commits immediately after byte transfer completion.

Its control logic eliminates EEPROM-style polling: after each byte acknowledge, the internal address latch auto-increments, enabling seamless sequential reads/writes. Write protection is implemented via dedicated WP pin tied to VDD (full protection) or GND (enabled), with internal pull-downs on A2–A0 and WP.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial I²C nonvolatile memory applications.

Compared with AT24C64D-SSHM-T, CY15E064J-SXE delivers 100,000× greater endurance and eliminates write latency, while FM24V06-G offers identical F-RAM benefits but lacks 5 V operation and AEC-Q100 compliance - making CY15E064J-SXE the sole choice for 5 V automotive-A applications demanding zero-write-delay reliability.

Availability

CY15E064J-SXE is available at Aetrix Electronics and suitable for automotive EDR systems, engine control units, and ADAS sensor loggers requiring stable component supply with guaranteed long-term availability and AEC-Q100 compliance.

Supply support for CY15E064J-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

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

The CY15E064J-SXE belongs to Cypress's automotive-qualified F-RAM product line, engineered specifically for mission-critical automotive data logging where EEPROM limitations in endurance, speed, and power create system-level risk.

FAQ

Is CY15E064J-SXE pin-compatible with standard 64-Kbit I²C EEPROMs?

Yes - it uses an identical 8-pin SOIC package and matches the industry-standard I²C slave address format (1010b + A2:A0), with functionally equivalent SDA, SCL, WP, VDD, and VSS pins. No PCB redesign or firmware modification is required for drop-in replacement in existing EEPROM-based designs.

Does CY15E064J-SXE require special I²C timing or initialization sequences?

No - it fully complies with standard I²C protocol specifications, supporting legacy 100 kHz and 400 kHz modes as well as 1-MHz fast-mode plus. No custom initialization, dummy writes, or address preloading is needed; it behaves identically to EEPROM at the bus level except for instantaneous write completion.

How does the WP pin function, and what happens if left floating?

The WP pin is internally pulled down; if left unconnected, it defaults to LOW and enables full memory write access. When tied to VDD, it disables all write operations across the entire 8K address space. This hardware lock operates independently of I²C commands and remains active even during power transitions.

What is the maximum supported I²C bus capacitance for reliable 1-MHz operation?

Per the datasheet AC switching characteristics, reliable 1-MHz operation requires total bus capacitance ≤ 200 pF. This is achieved using 2.2 kΩ pull-up resistors on SDA/SCL with trace lengths < 10 cm and minimal stubs - verified in automotive ECU reference layouts by Cypress.