The CY15B104Q-LHXIES is a 4-Mbit (512 K x 8) Nonvolatile Static RAM (nvSRAM) manufactured by Cypress Semiconductor (now Infineon Technologies). nvSRAM combines the fast access speeds of SRAM with the non-volatility of EEPROM, providing data retention even when power is lost. This specific part number is likely a specific grade, temperature range, and packaging option within the CY15B104Q family.

Applications:

• Data Logging: Used in applications that require continuous data recording with no data loss during power outages (e.g., industrial monitoring, automotive data recorders).
• Meter Reading: Stores meter readings (e.g., water, gas, electricity) securely, ensuring data integrity in case of power failures.
• Industrial Automation: Provides reliable memory for programmable logic controllers (PLCs) and other industrial control systems.
• Medical Devices: Used in medical equipment for storing critical patient data and configuration settings.
• Gaming Machines: Employs secure and non-volatile storage of game states and audit logs.

Features

• 4-Mbit Nonvolatile SRAM: Offers 4 megabits of non-volatile memory with SRAM read/write speeds.
• Fast Read/Write Access: Provides SRAM-like access times, typically in the nanosecond range.
• Automatic STORE on Power Down: Automatically backs up SRAM data to non-volatile memory upon power loss.
• RECALL to SRAM on Power Up: Automatically restores data from non-volatile memory to SRAM when power is restored.
• Unlimited Endurance: Offers virtually unlimited read/write cycles to the SRAM portion of the memory.
• Data Retention: Retains data for many years (typically 20 years or more) in the absence of power.
• RoHS Compliant: Complies with Restriction of Hazardous Substances (RoHS) directive.

Benefits

• Data Security: Ensures no data loss during power outages, protecting critical information.
• High Performance: Provides fast read/write speeds, enabling real-time data processing.
• Ease of Use: Can be used like standard SRAM, simplifying system design.
• Reliability: Offers robust data retention and endurance.
• Reduced System Complexity: Eliminates the need for external battery backup or complex power management circuitry.

Additional Details

The CY15B104Q-LHXIES typically operates from a 3.3V power supply. It usually comes in a SOIC or QFN package. The specific temperature range depends on the suffix code in the part number (e.g., Industrial: -40°C to +85°C). Data is typically backed up using an internal capacitor that provides power for the STORE operation. It's a direct replacement for battery-backed SRAM (BBSRAM) in many applications.