Infineon Technologies CY14ME064J2-SXIT

Overview

CY14ME064J2-SXIT from Cypress Semiconductor is a 64-Kbit (8 K × 8) serial I²C nonvolatile SRAM with QuantumTrap technology, operating at 4.5–5.5 V. It integrates volatile SRAM and nonvolatile storage in one die, supports AutoStore on power-down via VCAP capacitor, Software STORE/RECALL via I²C commands, and Hardware STORE via HSB pin. Used in industrial control systems for real-time data logging during unexpected power loss.

For engineers reviewing the CY14ME064J2-SXIT datasheet, CY14ME064J2-SXIT pinout, CY14ME064J2-SXIT application, or CY14ME064J2-SXIT equivalent, key selection criteria include I²C speed support up to 3.4 MHz, 20-year data retention at 85 °C, 1 million STORE cycles, hardware write protection via WP pin, and 8-pin SOIC package compatibility with legacy 5 V systems.

Technical Context

This nvSRAM implements dual-mode nonvolatile operation: automatic STORE triggered by VCAP discharge during VCC collapse, and user-initiated STORE/RECALL via I²C command or HSB assertion. The memory uses a unified 8 K × 8 SRAM array backed by QuantumTrap nonvolatile elements per cell, enabling infinite SRAM read/write cycles alongside guaranteed 1M STORE endurance.

The I²C interface complies with standard (100 kHz), fast (400 kHz), fast-plus (1 MHz), and high-speed (3.4 MHz) modes - all supported natively without mode configuration. Slave addressing uses A2/A1 pins (A0 omitted in J2 variant), and write protection operates via dedicated WP pin or software-configurable block lock (1/4, 1/2, or full array).

Key Specifications

Pinout & Package

Package: 8-pin Small Outline Integrated Circuit (SOIC), RoHS-compliant, industrial temperature grade (–40 °C to +85 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM24V06-G and AT24C64D-SSHM-T, CY14ME064J2-SXIT uniquely delivers 3.4 MHz I²C throughput, hardware-triggered STORE via HSB, and 20-year retention - making it the only option for high-speed, safety-critical power-loss resilience in 5 V industrial systems.

Availability

CY14ME064J2-SXIT is available at Aetrix Electronics and suitable for industrial data loggers, smart energy meters, and PLC I/O modules requiring stable component supply, long-lifecycle assurance, and RoHS-compliant 5 V nonvolatile memory.

Supply support for CY14ME064J2-SXIT 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 mixed-signal ICs for industrial, automotive, and IoT applications, with emphasis on robustness, longevity, and system-level integration.

CY14ME064J2-SXIT belongs to Cypress's nvSRAM product line, engineered specifically for mission-critical data retention in 5 V systems where battery backup is impractical and EEPROM latency is unacceptable.

FAQ

What is the role of the VCAP pin, and what capacitor value is recommended?

The VCAP pin supplies hold-up energy to complete an AutoStore operation during VCC dropout. Cypress specifies a minimum 4.7 µF tantalum or ceramic capacitor rated ≥10 V, placed within 10 mm of the pin. Larger values extend STORE window but increase power-up RECALL time; 10 µF is commonly used for 20–50 ms dropout tolerance in 5 V systems.

Does CY14ME064J2-SXIT support I²C clock stretching, and how is busy status indicated?

Yes - the device asserts clock stretching during STORE/RECALL execution and internal write cycles. Busy status is signaled via the HSB pin (driven LOW during active STORE/RECALL) and confirmed by monitoring ACK/NACK behavior on SDA. The datasheet defines tHHHD (HSB HIGH hold time) as 100 ns min after operation completion.

Can the serial number be rewritten, and what happens after locking?

The 8-byte serial number can be written once using the Serial Number Write command (0x90), then permanently locked with Serial Number Lock (0x91). After locking, reads return the programmed value but further writes are rejected with NACK - ensuring immutable unit identification for calibration traceability and anti-counterfeiting.

How does write protection interact with STORE operations?

Hardware WP pin disables all STORE, RECALL, and memory write commands when asserted LOW. Software block protection applies only to SRAM writes and does not inhibit STORE/RECALL - allowing protected data regions to be safely preserved while still enabling full nonvolatile backup of the entire array on power loss.