DS1244Y-150

Overview

The DS1244Y-150 is a Phantom Time Chip manufactured by Analog Devices Inc./Maxim Integrated, housed in a 28-EDIP package. It integrates a real-time clock with calendar functionality and 32KB of non-volatile SRAM (NVSRAM). The device supports parallel bus interfaces and operates within a supply voltage range of 4.5V to 5.5V. It maintains time in HH:MM:SS format (12/24 hour) and dates in YY-MM-DD format. Key features include leap year compensation and EEPROM capabilities. The component is designed for through-hole mounting and functions within an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrates 32KB NVSRAM with phantom clock technology for seamless data retention
• Supports parallel interface with 4.5V to 5.5V supply voltage
• Includes hardware leap year compensation and alarm functions
• Housed in 28-DIP Module (0.600") package for through-hole installation

Applications

• Industrial control systems requiring persistent timekeeping
• Data logging equipment needing non-volatile memory backup
• Telecommunications infrastructure maintaining synchronized timestamps

Procurement Notes

Verify the specific suffix '150' against official datasheets to confirm access time specifications, as local sources may not detail performance variations between speed grades. Ensure compatibility with existing parallel bus architectures and validate that the 28-EDIP footprint matches the target PCB design constraints.

Selection Notes

Select this component when a combined RTC and substantial NVSRAM solution is required in a DIP package. Compare current consumption figures (5mA–10mA) against system power budgets. Confirm that the parallel interface protocol aligns with the host microcontroller's capabilities and that the 0°C to +70°C industrial temperature range meets environmental requirements.

Part Context

This part belongs to the Maxim Integrated Phantom Clock family, which combines RTC logic with battery-backed SRAM. Unlike standard RTCs with small registers, this series provides significant on-chip storage. The 'Y' suffix typically denotes the commercial temperature grade, while the package type ensures compatibility with legacy DIP sockets.

Replacement Considerations

Direct replacements must match the 28-EDIP form factor and parallel interface. Verify pinout compatibility with similar Phantom Clock modules. Consider newer serial-interface RTCs if board space allows, though memory density will likely require external NVSRAM solutions.