Infineon Technologies CY14ME064J1-SXI

Overview

CY14ME064J1-SXI 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 supports AutoStore on power-down, Software/Hardware STORE/RECALL, and delivers 3.4 MHz I²C interface speed with zero-cycle-delay reads/writes for real-time data retention in industrial control systems.

For engineers reviewing the CY14ME064J1-SXI datasheet, CY14ME064J1-SXI pinout, CY14ME064J1-SXI application, or CY14ME064J1-SXI equivalent, key selection criteria include V_CC range (4.5–5.5 V), 8-pin SOIC package, I²C slave address configuration (A2/A1/A0), hardware STORE/RECALL via HSB, and VCAP capacitor support for autonomous nonvolatile backup.

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. It supports four I²C speed modes - Standard (100 kHz), Fast (400 kHz), Fast-Plus (1 MHz), and High-Speed (3.4 MHz) - with shared timing parameters optimized across all modes.

The device implements three STORE initiation methods: automatic power-loss detection (with external VCAP capacitor), I²C command (Software STORE), and active-low HSB pin assertion (Hardware STORE). RECALL occurs automatically at power-up or via I²C command, ensuring deterministic data restoration without host intervention.

Key Specifications

Pinout & Package

Package: 8-pin Small Outline Integrated Circuit (SOIC), RoHS-compliant, surface-mount, 150 mil width.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FM24V06-G and AT24C512C-SSHL-T, CY14ME064J1-SXI uniquely combines 5 V compatibility, hardware-triggered STORE/RECALL, and 3.4 MHz I²C - making it the only option for deterministic, high-throughput nonvolatile logging in legacy industrial 5 V ecosystems.

Availability

CY14ME064J1-SXI is available at Aetrix Electronics and suitable for industrial programmable logic controllers, smart electricity meters, and railway signaling controllers requiring stable component supply, long-term data retention, and deterministic power-loss recovery.

Supply support for CY14ME064J1-SXI 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, with focus on integration, security, and longevity.

CY14ME064J1-SXI belongs to the I²C nvSRAM product line, engineered specifically for systems needing instant-on nonvolatile memory with zero software overhead and guaranteed data persistence across uncontrolled power events.

FAQ

What is the minimum VCAP capacitor value required for reliable AutoStore operation?

The datasheet specifies a minimum 4.7 µF tantalum or ceramic capacitor on the VCAP pin for reliable AutoStore during VCC dropout. This value ensures sufficient energy to complete STORE within the specified t_STORE (max 20 ms) under worst-case 5.5 V → 2.7 V droop conditions. Larger values extend hold-up time but do not improve reliability beyond specification limits.

Can CY14ME064J1-SXI operate on a 3.3 V I²C bus?

No. CY14ME064J1-SXI requires VCC = 4.5–5.5 V 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 bus risks undervoltage operation, communication failure, or damage due to I²C pull-up conflicts. Use CY14MB064J for 2.7–3.6 V systems.

How does Hardware STORE differ from Software STORE in terms of timing and latency?

Hardware STORE initiated via HSB pin asserts within 100 ns of pin transition and completes in ≤20 ms (t_STORE). Software STORE requires I²C transaction overhead (address + command byte + ACK), adding ~5–10 µs latency before STORE begins. Both use identical QuantumTrap programming, so final data retention and endurance are identical.

Is the 8-byte serial number user-programmable?

No. The 8-byte serial number is factory-programmed and permanently locked. It is readable via I²C command (0x0F) but cannot be modified, erased, or reprogrammed in-system. This ensures permanent traceability and prevents counterfeit substitution in certified industrial deployments.