Infineon Technologies CY14MB064J2-SXIT

Overview

CY14MB064J2-SXIT from Cypress Semiconductor is a 64-Kbit (8 K × 8) serial I²C nonvolatile SRAM with QuantumTrap technology, operating at 2.7–3.6 V. It supports AutoStore on power-down, Software/Hardware STORE/RECALL, and I²C speeds up to 3.4 MHz. Used in industrial controllers for real-time data logging during unexpected power loss.

For engineers reviewing the CY14MB064J2-SXIT datasheet, CY14MB064J2-SXIT pinout, CY14MB064J2-SXIT application, or CY14MB064J2-SXIT equivalent, key selection criteria include I²C speed mode support (100 kHz / 400 kHz / 1 MHz / 3.4 MHz), VCAP capacitor-backed AutoStore timing, WP pin hardware write protection, and 8-pin SOIC package compatibility with legacy board layouts.

Technical Context

This nvSRAM integrates volatile SRAM and nonvolatile QuantumTrap storage in a single die, enabling seamless STORE (SRAM → nonvolatile) and RECALL (nonvolatile → SRAM) operations. STORE triggers automatically on VCC drop below threshold (with external VCAP), or via I²C command or HSB pin assertion; RECALL occurs at power-up or via I²C command.

The device implements full I²C protocol compliance-including START/STOP, ACK/NACK, 7-bit addressing with A2/A1/A0 slave address pins-and supports all four standard I²C speed modes without external configuration. Memory access uses zero-cycle-delay reads/writes, and internal control logic manages block protection (1/4, 1/2, or full array) via software register.

Key Specifications

Pinout & Package

Package: 8-pin Small Outline Integrated Circuit (SOIC), RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM24V06-G and AT24C512N-10PU-2.7, CY14MB064J2-SXIT uniquely delivers deterministic power-loss STORE via VCAP + HSB, making it optimal for systems where uncontrolled brownouts demand guaranteed state capture without MCU intervention.

Availability

CY14MB064J2-SXIT is available at Aetrix Electronics and suitable for industrial PLC data logging, medical device parameter storage, and smart meter firmware state retention requiring stable component supply and long-term lifecycle assurance.

Supply support for CY14MB064J2-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 memory and programmable solutions for industrial, automotive, and IoT applications.

CY14MB series nvSRAMs were engineered to replace battery-backed SRAM and EEPROM in mission-critical systems demanding instant nonvolatility, infinite write endurance, and seamless I²C integration.

FAQ

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

The VCAP pin connects an external capacitor that supplies hold-up energy during VCC collapse to complete the AutoStore operation. Cypress specifies a minimum 4.7 µF tantalum or ceramic capacitor rated ≥6.3 V, placed within 10 mm of the pin. Larger values extend STORE time but increase inrush current; undersized capacitors risk incomplete STORE under fast power decay.

How does Hardware STORE differ from Software STORE in practice?

Hardware STORE is initiated by pulling the HSB pin LOW externally - bypassing I²C arbitration and firmware latency, enabling sub-microsecond trigger response. Software STORE requires issuing an I²C command (0x01) and waits for bus availability, making it suitable for scheduled saves but not for immediate power-loss capture.

Can the CY14MB064J2-SXIT operate at 1 MHz I²C speed without external configuration?

Yes - the device auto-detects I²C speed mode based on SCL timing and supports 1 MHz (Fast-mode Plus) natively. No register setup or pin strapping is needed; however, system-level pull-up resistors must be sized for ≤400 pF bus capacitance to meet tHD:DAT and tSU:STA specifications per I²C specification.

Is the serial number writable, and how is it protected against overwrite?

The 8-byte serial number is factory-programmed and permanently locked after initial write. Writing to the serial number register requires first setting the SNLOCK bit in the Control Register; once set, the serial number becomes read-only until next power cycle. This prevents accidental or malicious reprogramming in field-deployed units.