RX-4575LC:B

Real Time Clock Overview

The RX-4575LC:B is a real-time clock module manufactured by Epson Timing, featuring an integrated frequency-adjusted 32.768 kHz crystal unit and a 3-wire serial interface. It operates within a power voltage range of 1.6 V to 5.5 V and supports a wide timekeeper voltage range of 1.3 V to 5.5 V. The device provides low backup current consumption, typically 0.35 µA at 3 V. Key specifications include a frequency tolerance of ±23 × 10⁻⁶ at +25 °C and operation across a temperature range of -40 °C to +85 °C. It includes full calendar, alarm, timer, and external event detection functions.

Real Time Clock Feature Summary

• Integrated 32.768 kHz crystal unit with built-in frequency adjustment
• 3-wire serial interface for communication
• External event detection with selectable Hi/Lo detection and chattering filter (8 ms, 31 ms, 62 ms, 125 ms)
• Built-in 12-bit counter with selectable timing periods (1 min, 1 s, 64 Hz, 4096 Hz)

Real Time Clock Applications

• Car Multimedia systems
• Body Electronics
• Remote Keyless Entry systems

Real Time Clock Procurement Notes

Verify the specific ordering suffix 'B' against the manufacturer's datasheet to confirm the exact frequency tolerance rating of ±23 ppm. Confirm package type as VSOJ-12pin and ensure compliance with RoHS directives if required for the target market.

Real Time Clock Selection Notes

Select this component when a compact RTC with integrated crystal and external event detection is required. Ensure the host system supports a 3-wire serial interface and can handle the specified operating voltage range of 1.6 V to 5.5 V. Consider the backup current requirements for battery-powered applications.

Real Time Clock Part Context

The RX-4575LC belongs to Epson's RX-4575LC series of real-time clock modules. It shares the VSOJ-12pin package form factor with other models in the LC series, such as the RX-4574LC and RX-4571LC, but distinguishes itself through its specific 3-wire serial interface and external event detection capabilities.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult Epson Timing directly for equivalent or alternative RTC modules with similar interface and performance characteristics.