DS12885SN

Overview

The DS12885SN is a Real-Time Clock (RTC) integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It provides clock and calendar functions with a parallel interface, supporting both 12-hour and 24-hour time formats alongside YY-MM-DD-dd date formatting. The device includes 114 bytes of NVSRAM for data storage. It operates within a supply voltage range of 4.5V to 5.5V, with a maximum timekeeping current of 15mA at these voltages. The component is housed in a 24-SOIC surface-mount package and is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated Alarm, Daylight Savings Time, and Leap Year compensation features
• Includes 114 bytes of Non-Volatile Static RAM (NVSRAM)
• Supports Square Wave Output functionality
• Parallel bus interface for system connectivity

Applications

• Industrial systems requiring precise timekeeping in harsh environments
• Embedded devices needing battery-backed real-time clock capabilities
• Data logging equipment utilizing the integrated NVSRAM

Procurement Notes

Verify the specific suffix requirements against the manufacturer's datasheet before ordering, as suffixes may indicate variations in packaging or temperature grades. Confirm availability status directly with authorized distributors, as lead times and stock levels fluctuate. Ensure the 24-SOIC package dimensions align with the target PCB footprint design constraints.

Selection Notes

Select this component when a parallel interface is preferred over serial alternatives like I2C or SPI. Ensure the system power supply remains stable between 4.5V and 5.5V during operation. Consider the 15mA peak current consumption for power budget calculations. Verify that the 114-byte memory capacity meets the application's data retention needs without requiring external memory expansion.

Part Context

This part belongs to the Maxim Integrated RTC family, which offers various timing solutions. The DS12885SN specifically targets applications requiring robust calendar functions and non-volatile storage in a standard SOIC package. It serves as a dedicated timing controller for microprocessor-based systems.

Replacement Considerations

Check for direct pin-compatible replacements within the same product line if sourcing issues arise. Verify that any substitute maintains the same parallel interface protocol and voltage specifications to ensure compatibility.