Infineon Technologies CY14ME064J2-SXQ

Overview

CY14ME064J2-SXQ from Infineon Technologies (formerly Cypress) is a 64-Kbit serial I²C nonvolatile SRAM with QuantumTrap technology, organized as 8 K × 8, operating from 4.5 V to 5.5 V over –40 °C to +105 °C, featuring AutoStore on power-down, Power-Up RECALL, and 3.4 MHz Fast-mode Plus I²C interface - deployed in industrial control data logging where deterministic nonvolatile write-back during brownout is critical.

For engineers reviewing the CY14ME064J2-SXQ datasheet, CY14ME064J2-SXQ pinout, CY14ME064J2-SXQ application, or CY14ME064J2-SXQ equivalent, key selection considerations include I²C speed support (up to 3.4 MHz), VCAP capacitor-assisted STORE timing, hardware write protection via WP pin, and extended temperature operation without derating.

Technical Context

This nvSRAM integrates SRAM and QuantumTrap nonvolatile storage per cell, enabling zero-cycle-delay reads/writes and atomic STORE/RECALL operations. It supports full I²C protocol compliance including START/STOP, ACK/NACK, 7-bit addressing, and multi-master bus sharing.

The device implements dual STORE initiation: automatic on VCC drop below threshold (using external VCAP capacitor), or software-triggered via I²C command. RECALL occurs automatically at power-up or on-demand, ensuring deterministic memory state restoration independent of system boot sequence.

Key Specifications

Pinout & Package

8-pin SOIC (Small Outline Integrated Circuit) package with standard 1.27 mm pitch and gull-wing leads - compatible with automated SMT assembly and IPC-7351B footprint standards.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nvSRAM applications.

Compared with FM24V06-G and AT24MAC402-MAHM-T, CY14ME064J2-SXQ uniquely delivers simultaneous high-speed SRAM access and capacitor-backed nonvolatile STORE - essential for real-time systems requiring sub-millisecond data persistence without firmware intervention.

Availability

CY14ME064J2-SXQ is available at Aetrix Electronics and suitable for industrial data loggers, automotive ECUs, and smart energy meters requiring stable component supply across extended temperature and long product lifecycles.

Supply support for CY14ME064J2-SXQ 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 management, sensing, connectivity, and security solutions for industrial, automotive, and IoT applications.

CY14ME064J2-SXQ belongs to Infineon's nvSRAM product line, engineered to replace battery-backed SRAM and EEPROM in mission-critical systems where data integrity during power interruption is non-negotiable.

FAQ

What is the minimum VCAP capacitance required for reliable AutoStore operation?

The datasheet specifies a typical 4.7 µF tantalum or ceramic capacitor on VCAP to ensure STORE completion during VCC dropout exceeding 100 µs. With a 5.5 V supply and 2 mA peak STORE current, this value sustains voltage above the 2.0 V threshold for ≥200 µs - sufficient for most industrial brownout profiles. Lower values may work but require empirical validation per system power decay characteristics.

Can the CY14ME064J2-SXQ operate on a 3.3 V I²C bus?

No - CY14ME064J2-SXQ requires 4.5 V to 5.5 V on VCC and is not 3.3 V tolerant. Its I²C pins are designed for 5 V logic levels and lack level-shifting circuitry. Connecting to a 3.3 V master without external level translation will cause communication failure and potential damage due to VIH/VIL mismatch and excessive current through clamp diodes.

How does Software RECALL differ from Power-Up RECALL in terms of timing and system impact?

Power-Up RECALL initiates automatically when VCC rises above 2.0 V and completes within 15 ms, blocking I²C access until finished. Software RECALL executes in <5 ms after command issuance and can be triggered at any time - enabling selective restore of configuration blocks without halting ongoing data acquisition, unlike the unconditional power-cycle behavior.

Is the 8-byte serial number field one-time programmable or field-updatable?

The 8-byte serial number is user-writable and nonvolatile - it can be programmed multiple times via I²C command (0x0E) and retains value across STORE/RECALL cycles and power cycles. However, it resides in the same QuantumTrap cells as main memory, so each write consumes one STORE cycle; endurance limits apply identically to main array writes.