MAX31343ETAY+

Real Time Clock Overview

The MAX31343ETAY+ is a low-cost, high-accuracy I2C real-time clock (RTC) featuring an integrated MEMS resonator. It eliminates the need for external crystals while maintaining timekeeping accuracy of ±5ppm (±0.432 seconds/day) across the -40°C to +85°C temperature range. The device supports supply voltages from +1.6V to +5.5V and includes a battery backup input with automatic switchover upon power failure. Key specifications include two programmable alarms, a digital temperature sensor with ±3°C accuracy, 64 bytes of user RAM, and open-drain interrupt/square-wave outputs.

Real Time Clock Feature Summary

• Integrated MEMS resonator providing ±5ppm timekeeping accuracy without external crystals
• Dual alarm system with programmable time-of-day triggers and interrupt output
• Built-in digital temperature sensor accurate to ±3°C
• Automatic power-fail detection with seamless switch to VBAT backup supply
• 64-byte non-volatile SRAM for user data storage

Real Time Clock Applications

• Industrial equipment requiring precise timing
• Action cameras and wearable devices
• Handheld instrumentation
• Power meters and communication systems

Real Time Clock Procurement Notes

Verify the specific suffix ETAY against the manufacturer's current ordering guide to confirm package type and RoHS compliance status. Confirm availability through authorized distributors as stock levels fluctuate. Ensure the selected variant matches the required thermal performance and pinout configuration for the target PCB layout.

Real Time Clock Selection Notes

Select this component when crystal-free operation and high long-term stability are required. The integrated MEMS oscillator simplifies BOM management and reduces board space compared to traditional quartz RTCs. Ensure the application voltage remains within the 1.6V to 5.5V range and that the I2C bus pull-up resistors are compatible with the system logic levels.

Real Time Clock Part Context

This part belongs to the MAX31343 family of real-time clocks manufactured by Analog Devices/Maxim Integrated. It is designed as a drop-in replacement for discrete RTC solutions, offering enhanced accuracy through factory-trimmed MEMS technology. The device integrates power management features typically found in separate PMICs or complex RTC circuits.

Real Time Clock Replacement Considerations

Direct replacements may include other MEMS-based RTCs from Analog Devices such as the MAX31342 or MAX31334. Verify interface compatibility (I2C) and pinout alignment before substitution. Note that packages differ; the ETAY suffix indicates a TDFN package, whereas other variants may use WLP.