MAX31329NELB+T

Real Time Clock Overview

The MAX31329NELB+T is a low-current real-time clock (RTC) featuring an integrated 32.768kHz crystal and I²C interface. It operates within a voltage range of +1.6V to +5.5V, consuming typical timekeeping currents of 240nA at 3.0V and 500nA at 1.6V. The device includes power management with automatic switchover to backup supply, two time-of-day alarms, a programmable countdown timer, and 64 bytes of user RAM. It provides interrupt outputs, a Schmitt trigger input, and external clock synchronization capabilities in a 10-pin, 5mm x 5mm LGA package.

Real Time Clock Feature Summary

• Integrated 32.768kHz crystal with ±5ppm typical accuracy
• Low current consumption: 240nA typical at VCC = 3.0V
• I²C serial interface with bus timeout mechanism
• Power management with automatic backup switchover and trickle charger

Real Time Clock Applications

• Industrial Equipment
• Test and Measurement Equipment
• Energy Meters
• Medical Devices
• IoT Devices

Real Time Clock Procurement Notes

Verify the specific suffix 'NELB' against official Analog Devices documentation to confirm package type and RoHS compliance status. Ensure the ordering code matches the exact pin configuration and thermal requirements for the target PCB design.

Real Time Clock Selection Notes

Select this component when board space is limited due to the integrated crystal and small LGA package. Ensure the system voltage remains within the 1.6V to 5.5V range. Consider the 240nA typical current draw for battery life calculations in low-power applications.

Real Time Clock Part Context

This part belongs to the Maxim Integrated RTC family, designed for high-reliability timekeeping. It integrates features typically requiring external components, such as the oscillator circuit and power management logic, simplifying the overall system design.

Real Time Clock Replacement Considerations

Check for direct pin-compatible alternatives within the Maxim/Analog Devices portfolio that offer similar I²C interfaces and integrated crystals. Verify electrical characteristics and package dimensions before substitution.