BQ3285LCS

Overview

The BQ3285LCS is a CMOS real-time clock (RTC) integrated circuit manufactured by Texas Instruments. It functions as a low-power microprocessor peripheral, providing accurate time-of-day tracking and a 100-year calendar with alarm capabilities. The device supports battery operation to maintain data retention during power loss. It interfaces via a parallel bus architecture, utilizing a 24-SSOP package with a width of 3.90mm. The component is designed for volatile memory applications requiring precise temporal data management in embedded systems.

Feature Summary

• Provides continuous time-of-day clock and 100-year calendar functionality
• Supports battery backup operation for data retention
• Features programmable alarm capabilities
• Utilizes parallel interface for microprocessor communication

Applications

• Microprocessor-based embedded systems requiring real-time tracking
• Data logging equipment needing calendar and timestamp accuracy
• Battery-powered portable devices with time-sensitive operations
• Industrial control systems requiring persistent timekeeping

Procurement Notes

Verify the specific suffix 'LCS' corresponds to the 24-SSOP package variant when sourcing. Confirm that the device is classified as volatile RTC, ensuring appropriate battery backup circuits are included in the design to maintain calendar data. Check for active status and RoHS compliance through official Texas Instruments channels or authorized distributors before procurement.

Selection Notes

Select this component when a parallel interface RTC is required for microprocessor integration. Consider the 24-SSOP package constraints for PCB layout. Ensure the application environment supports the voltage levels specified in the datasheet. Evaluate the need for alarm features and 100-year calendar accuracy against alternative serial interface RTCs if space or pin count is limited.

Part Context

The BQ3285 series belongs to Texas Instruments' portfolio of real-time clock peripherals. The BQ3285LCS specifically denotes the lead-free, tape-and-reel version in the SSOP package. It complements other BQ328x variants that may offer different packaging or interface options, serving as a standard solution for non-volatile timekeeping in general-purpose computing applications.

Replacement Considerations

Direct substitutes include other BQ3285 variants such as BQ3285LQN or BQ3285EP, provided the package and interface compatibility are verified. Cross-reference pinouts and electrical specifications to ensure functional equivalence. No generic RTC replacements should be used without confirming parallel bus protocol support.