The BR93L46 is a 1Kbit EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by Rohm Semiconductor. It is a serial EEPROM, meaning it uses a serial interface for communication, specifically the Microwire interface. This device is non-volatile, meaning it retains its data even when power is removed.

Applications

• Consumer electronics (TVs, remote controls)
• Industrial equipment
• Automotive systems
• Security devices
• Configuration storage

Features

• 1Kbit (128 x 8 or 64 x 16) EEPROM
• Microwire serial interface
• Low voltage operation
• Self-timed write cycle
• Write protect feature
• High reliability

Benefits

• Non-Volatile Memory: Retains data even when power is off, ensuring data integrity for critical settings and configurations.
• Microwire Interface: Simple serial interface ideal for microcontrollers, minimizing pin count and simplifying board layout.
• Low Voltage Operation: Conserves power, suitable for battery-powered applications.
• Write Protection: Prevents accidental overwriting of memory, safeguarding stored information.
• Compact Size: Small package allows for use in space-constrained applications.

Specifications

The BR93L46 EEPROM typically includes the following specifications:

• Memory size: 1Kbit (128 x 8 or 64 x 16, configurable)
• Supply voltage: Typically 1.8V to 5.5V (depending on the specific variant)
• Operating temperature range: -40°C to +85°C
• Microwire clock frequency: Varies, consult datasheet
• Write cycle time: Typically 5 ms
• Endurance: 1 million write cycles per byte
• Data retention: 100 years
• Package: Available in various packages, including SOP and TSSOP

The Microwire interface consists of three primary pins: Chip Select (CS), Serial Clock (SK), and Serial Data Input/Output (DI/DO). Data is serially shifted in and out of the device using these pins. The BR93L46 provides a cost-effective solution for storing small amounts of non-volatile data in a wide range of applications where a simple serial interface is preferred.