Infineon Technologies CY15E064J-SXA

Overview

CY15E064J-SXA 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, battery management systems, and ADAS event recorders.

For engineers reviewing the CY15E064J-SXA datasheet, CY15E064J-SXA pinout, CY15E064J-SXA application, or CY15E064J-SXA equivalent, key selection criteria include I²C bus-speed write capability, automotive-A temperature compliance, WP-controlled hardware write protection, and drop-in replacement feasibility versus legacy serial EEPROMs in safety-critical embedded storage.

Technical Context

The CY15E064J-SXA 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 100 kHz, 400 kHz, and 1 MHz clock frequencies while maintaining full compatibility with legacy EEPROM timing constraints.

Its internal address latch auto-increments after each byte transfer, enabling continuous sequential reads/writes across the full 13-bit address space (0x0000–0x1FFF). Write operations complete within one I²C byte cycle-no polling, no internal write cycles, and no elevated voltage generation required-distinguishing it fundamentally from EEPROM-based architectures.

Key Specifications

Pinout & Package

Package: 8-pin Small Outline Integrated Circuit (SOIC), RoHS-compliant, body width 3.9 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C64D-SSHM-T and FM24V05-G, the CY15E064J-SXA uniquely combines 5 V compatibility, AEC-Q100 Grade 2 qualification, and true bus-speed writes-making it the only option qualified for safety-critical automotive logging where voltage margin and deterministic latency are non-negotiable.

Availability

CY15E064J-SXA is available at Aetrix Electronics and suitable for engine control units, battery management systems, and ADAS event recorders requiring stable component supply across extended production lifecycles.

Supply support for CY15E064J-SXA 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 emphasis on embedded memory and programmable systems.

The CY15E064J-SXA belongs to Cypress's automotive F-RAM product line, engineered specifically to replace EEPROM in mission-critical automotive subsystems where write speed, endurance, and temperature resilience are essential.

FAQ

Is CY15E064J-SXA pin-compatible with standard 8-pin SOIC EEPROMs?

Yes-CY15E064J-SXA uses identical 8-pin SOIC footprint and I²C pin assignments (VDD, VSS, SDA, SCL, WP, A0–A2) as industry-standard serial EEPROMs like the AT24C64. No PCB redesign is needed for drop-in replacement, though WP logic polarity and absence of write-cycle timing constraints must be verified in firmware.

Does CY15E064J-SXA require external circuitry beyond standard I²C pull-ups?

No-beyond standard 1–10 kΩ pull-up resistors on SDA and SCL lines, no additional components are required. Internal pull-downs on A0–A2 and WP eliminate need for external biasing; Schmitt-trigger inputs and slope-controlled outputs ensure robust signal integrity without external filtering or termination.

How does the 151-year data retention specification apply in automotive environments?

The 151-year retention is specified at +85 °C ambient and represents worst-case extrapolation per JEDEC JESD22-A117. In actual automotive use (e.g., under-hood at 70 °C max), projected retention exceeds 500 years-ensuring data integrity over full vehicle lifetime without refresh or backup power.

Can CY15E064J-SXA operate reliably during cold-cranking voltage dips?

Yes-its 4.5 V minimum VDD allows uninterrupted operation during ISO 16750-2 cold-crank pulses (down to 4.5 V for 10 ms). Unlike EEPROMs requiring ≥4.75 V for write completion, CY15E064J-SXA commits writes at bus speed and retains data even if VDD collapses mid-transaction-no data corruption occurs.