The X25642SI-2.7T1 is a 64Kbit SPI Serial EEPROM manufactured by Xicor Inc. (now Intersil/Renesas). This device offers non-volatile storage and utilizes a Serial Peripheral Interface (SPI) for communication. The 64Kbit capacity makes it suitable for applications requiring a moderate amount of persistent data storage, such as configuration settings, user profiles, or calibration data.

Applications

• Smart Sensors: Stores calibration data and sensor parameters in industrial and environmental sensors.
• Printers: Stores printer settings and font data.
• Gaming Consoles: Retains game settings and user profiles.
• Network Routers: Stores network configuration parameters and firmware settings.
• Automotive Diagnostics: Used for storing diagnostic codes and vehicle parameters.

Features

• 64Kbit (8192 x 8) EEPROM: Provides 65536 bits of non-volatile memory.
• SPI Serial Interface: Utilizes a standard SPI interface for serial communication.
• Low-Voltage Operation: Optimized for low-voltage operation (2.7V).
• Self-Timed Write Cycle: Simplifies write operations with automatic timing control.
• Write Protection: Includes hardware and software write protection mechanisms.

Benefits

• Reliable Data Storage: Retains data even when power is removed.
• Simple Interface: SPI interface simplifies integration with microcontrollers.
• Low Power Consumption: Ideal for battery-powered and low-power applications.
• Data Protection: Prevents accidental data corruption through write protection features.
• Compact Size: Available in small packages for space-constrained designs.

The X25642SI-2.7T1 operates at a supply voltage of 2.7V and utilizes a 4-wire SPI interface, comprising Serial Clock (SCK), Master Out Slave In (MOSI), Master In Slave Out (MISO), and Chip Select (CS). The device includes hardware write protection through a WP pin and software write protection via status register bits. The self-timed write cycle feature simplifies programming by automatically managing the write timing. It is commonly available in SOIC and TSSOP packages. The X25642SI-2.7T1 also has a Status Register which is utilized for monitoring the completion of a write cycle. Its typical operating temperature ranges from -40°C to +85°C. It offers endurance of 1,000,000 cycles.