Infineon Technologies CY15B064J-SXAT

Overview

CY15B064J-SXAT from Cypress Semiconductor is a 64-Kbit (8K × 8) automotive-grade serial F-RAM with I²C interface, operating from 2.7 V to 3.65 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 automotive control units, battery management systems, and ADAS event recorders.

For engineers reviewing the CY15B064J-SXAT datasheet, CY15B064J-SXAT pinout, CY15B064J-SXAT application, or CY15B064J-SXAT equivalent, key selection criteria include I²C bus-speed write capability, zero-write-polling latency, automotive-A temperature compliance, and hardware-compatible replacement for legacy serial EEPROMs in safety-critical embedded storage.

Technical Context

The CY15B064J-SXAT 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 sequential reads/writes across the full 13-bit address space (0x0000–0x1FFF) without re-addressing. Write protection is controlled by the dedicated WP pin, and device selection uses A0–A2 pins for up to eight devices on one I²C bus.

Key Specifications

Pinout & Package

Package: 8-pin SOIC (Small Outline Integrated Circuit), RoHS-compliant, body width 3.9 mm, lead pitch 1.27 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, CY15B064J-SXAT offers 100 million× higher endurance and eliminates write delays; versus FM24V06-G, it adds AEC-Q100 Grade 2 qualification, extended voltage tolerance, and production traceability for automotive OEMs.

Availability

CY15B064J-SXAT is available at Aetrix Electronics and suitable for automotive event logging, EV battery management systems, and ADAS camera module configuration requiring stable component supply across long production lifecycles.

Supply support for CY15B064J-SXAT 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 expertise in nonvolatile memory and programmable systems.

The CY15B064J belongs to Cypress's automotive-qualified F-RAM product line, engineered specifically to replace serial EEPROM in safety-critical, high-write-frequency automotive subsystems where data integrity and longevity are paramount.

FAQ

Is CY15B064J-SXAT pin-compatible with standard 8-pin I²C EEPROMs like AT24C64?

Yes-CY15B064J-SXAT uses identical 8-pin SOIC packaging and I²C pin assignments (A0–A2, SDA, SCL, WP, VDD, VSS). Its slave address range (0xA0–0xA7) and command protocol match industry-standard EEPROMs, enabling direct hardware replacement without PCB redesign.

Does CY15B064J-SXAT require external circuitry for I²C pull-up resistors?

Yes-SDA and SCL lines require external pull-up resistors to VDD. Recommended values are 2.2 kΩ for 100 kHz, 1 kΩ for 400 kHz, and 4.7 kΩ for 1 MHz operation. The device includes internal Schmitt triggers and slew-rate control but no internal pull-ups.

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

The WP pin is internally pulled down, so memory is write-enabled by default at power-on. If external WP control is used, designers must ensure WP remains stable during VDD ramp-up; Cypress recommends tying WP to VDD through a resistor divider or using a supervisor IC to assert WP only after VDD stabilizes above 2.5 V.

Can CY15B064J-SXAT be used in systems requiring data security or cryptographic key storage?

No-it provides no built-in encryption, secure boot, or tamper detection. While its high endurance and retention support secure element companion devices, CY15B064J-SXAT itself stores plaintext data and relies on external MCU-level security for key management and access control.