SLR32CN-32.768K

Real Time Clock Overview

The Suntsu Electronics SLR32CN-32.768K is a low-power real-time clock module housed in a 3.2mm x 2.5mm SMD ceramic package. It integrates a 32.768kHz tuning fork crystal, CMOS oscillator, and RTC IC with temperature compensation. The device operates on a single supply voltage of 1.0V to 5.0V, consuming 0.5µA typical current during battery backup. Key electrical parameters include ±5.0ppm frequency stability, an operating temperature range of -40°C to +85°C, and I²C interface support up to 400kHz.

Real Time Clock Feature Summary

• Ultra-low power consumption of 0.5µA during battery backup operation
• High frequency stability of ±5.0ppm with built-in temperature sensor
• Integrated backup battery switchover function for continuous timekeeping
• I²C serial interface supporting standard and fast mode operations

Real Time Clock Applications

• Smart grid metering systems
• Ethernet communication equipment
• Display devices requiring precise timing
• Wireless communication modules

Real Time Clock Procurement Notes

Verify the specific ordering suffix 'N' corresponds to the ±5.0ppm stability grade as defined in the manufacturer's part numbering guide. Confirm that the 3.2mm x 2.5mm package dimensions align with the target PCB footprint. Ensure the I/O input voltage levels are compatible with the host system's logic voltage, noting the 5.5V maximum rating for SDA/SCL inputs.

Real Time Clock Selection Notes

Select this module when applications require minimal current drain during standby or battery-backed modes. The ±5.0ppm stability is suitable for general-purpose timing where high precision is needed without external calibration. Verify that the host microcontroller supports the required I²C protocol and can handle the slave address 0x64/0x65. Consider the -40°C to +85°C range against environmental conditions.

Real Time Clock Part Context

This component belongs to the SLR32C series from Suntsu Electronics, designed specifically for compact, battery-operated timing applications. The series combines a quartz resonator with digital control circuitry to provide accurate timekeeping in a miniature surface-mount form factor. The 'N' designation indicates the specific frequency tolerance variant within this product line.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. When evaluating alternatives, ensure compatibility with the 3.2mm x 2.5mm outline, I²C interface protocol, and backup switchover functionality. Verify that replacement parts meet the same ±5.0ppm stability and 0.5µA current consumption specifications.