Infineon Technologies CY15B064J-SXET

Overview

CY15B064J-SXET from Infineon Technologies (formerly Cypress) is a 64-Kbit (8K × 8) serial I²C automotive F-RAM nonvolatile memory IC. It operates from 3.0 V to 3.6 V, supports up to 1 MHz I²C interface speed, delivers 10¹³ read/write endurance, and guarantees data retention for 121 years at –40 °C to +125 °C. It serves as a hardware drop-in replacement for I²C EEPROM in automotive data logging and control systems.

For engineers reviewing the CY15B064J-SXET datasheet, CY15B064J-SXET pinout, CY15B064J-SXET application, or CY15B064J-SXET equivalent, key selection criteria include NoDelay™ write performance, AEC-Q100 Grade 1 compliance, I²C timing compatibility (100 kHz/400 kHz/1 MHz), WP-controlled write protection, and SOIC-8 package integration in space-constrained automotive ECUs.

Technical Context

The CY15B064J-SXET implements a ferroelectric memory array with zero write latency-data commits immediately after each byte transfer without polling. Its I²C slave interface uses a fixed 7-bit device ID (1010b) plus 3-bit hardware address (A2–A0) and R/W bit, enabling up to eight devices on one bus.

It features Schmitt-triggered SDA/SCL inputs for noise immunity, open-drain SDA with external pull-up requirement, and internal pull-down on WP and address pins. Write protection is active-high on WP, and all operations terminate with standard I²C START/STOP conditions.

Key Specifications

Pinout & Package

Package: 8-pin Small Outline Integrated Circuit (SOIC), 150 mil width, RoHS-compliant, moisture sensitivity level (MSL) 3.

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 FM24V06-G, the CY15B064J-SXET uniquely combines AEC-Q100 Grade 1 qualification, 1 MHz I²C speed, and 10¹³ endurance-making it the sole option for safety-relevant automotive data logging where deterministic writes and lifetime reliability are mandatory.

Availability

CY15B064J-SXET is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, electric power steering systems, and body control modules requiring stable component supply across extended automotive production lifecycles.

Supply support for CY15B064J-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.

The CY15B064J-SXET belongs to Infineon's automotive F-RAM product line, engineered specifically for zero-latency, high-endurance nonvolatile storage in safety-critical vehicle subsystems operating under extreme thermal and electrical stress.

FAQ

Is CY15B064J-SXET pin-compatible with standard I²C EEPROMs in SOIC-8 packages?

Yes, CY15B064J-SXET uses identical SOIC-8 pinout and I²C protocol timing as industry-standard 64-Kbit EEPROMs like AT24C64. Address pins A0–A2, SDA, SCL, WP, VDD, and VSS map directly-enabling drop-in replacement without PCB redesign. Hardware write protection and slave addressing behavior are functionally identical.

Does CY15B064J-SXET require special I²C initialization or driver modifications?

No. The device responds to standard I²C START/STOP conditions, 7-bit slave address (0xA0–0xA7), and byte-addressed read/write sequences. Microcontroller drivers written for EEPROM will operate unchanged-only write timing assumptions need updating since no polling or delay loops are required for completion.

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

Per the datasheet, total bus capacitance must not exceed 200 pF for 1 MHz operation. This includes PCB trace capacitance, MCU GPIO input capacitance, and parallel device inputs. Use series resistors ≤1 kΩ on SDA/SCL if ringing occurs, and limit stub length to <10 mm to maintain signal integrity.

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

The WP pin has an internal pull-down resistor (~100 kΩ), ensuring write-enable state (WP = LOW) at power-on reset. During brown-out, as VDD drops below 1.5 V, internal circuitry forces WP to logic LOW, preventing partial writes. This guarantees memory integrity even during uncontrolled power transitions.