DS12R887-5

Overview

The DS12R887-5 is a real-time clock (RTC) and calendar integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It provides timekeeping functions with a parallel interface, supporting both 12-hour and 24-hour time formats alongside a YY-MM-DD-dd date format. The device includes 114 bytes of non-volatile static RAM (NVSRAM). It operates within a supply voltage range of 4.5V to 5.5V, drawing a maximum current of 2mA during timekeeping. The component is designed for surface-mount installation in a 48-PBGA package (11.8x15.3 mm) and supports an extended industrial operating temperature range from -40°C to +85°C.

Feature Summary

• Integrated 114-byte NVSRAM for data retention
• Parallel bus interface with Alarm, Leap Year, and Square Wave Output capabilities
• Built-in trickle charger for backup power management
• Surface-mount 48-PBGA package (11.8x15.3 mm)

Applications

• Industrial control systems requiring precise timekeeping
• Data logging equipment needing non-volatile memory
• Embedded systems with parallel bus architectures

Procurement Notes

Verify the specific suffix '-5' against official datasheets to confirm voltage or temperature variants. Confirm package authenticity as the local source lists both Tray and PBGA, while standard documentation often cites EDIP packages for this family. Ensure compatibility with 4.5V–5.5V logic levels.

Selection Notes

Select this part when a parallel interface is required instead of serial alternatives like I2C or SPI. The 114-byte NVSRAM capacity suits applications needing moderate data storage alongside timekeeping. Verify that the 48-PBGA footprint fits the PCB design constraints compared to through-hole EDIP options.

Part Context

This component belongs to the DS12R887 series of RTCs, which integrate quartz crystals and battery switching circuits. It is functionally related to the DS12887 and DS12C887 families but offers different packaging and interface configurations suitable for modern surface-mount assembly processes.

Replacement Considerations

Direct pin-to-pin replacements may include other members of the DS12R887 family. Verify electrical parameters such as supply voltage and current consumption before substituting with similar RTCs from Analog Devices or Maxim Integrated.