DS1243Y-120

Overview

The DS1243Y-120 is a parallel interface Real-Time Clock (RTC) manufactured by Analog Devices Inc./Maxim Integrated. It functions as a phantom time chip, providing calendar and clock capabilities with a date format of YY-MM-DD-dd and time format of HH:MM:SS:hh in both 12-hour and 24-hour modes. The device supports leap year compensation and operates within a voltage supply range of 4.5V to 5.5V. Timekeeping current is specified at a maximum of 7mA @ 3.3V. It is housed in a 28-EDIP module package with dimensions of 0.600 inches (15.24mm), designed for through-hole mounting and an operating temperature range of 0°C to +70°C.

Feature Summary

• Parallel interface RTC with phantom chip architecture
• Leap year compensation support
• Dual time format capability (12/24 hour)
• Through-hole 28-EDIP module packaging

Applications

• Systems requiring non-volatile timekeeping without battery backup switching complexity
• Industrial equipment needing calendar and clock functions
• Embedded systems utilizing parallel bus architectures

Procurement Notes

Verify the specific suffix Y-120 against official datasheets to confirm speed grade and temperature range compatibility. Confirm package authenticity as the 28-EDIP module form factor may vary between manufacturers. Ensure voltage supply levels match the 4.5V to 5.5V specification during integration.

Selection Notes

Select this component when a parallel interface is required for RTC functionality. The phantom chip design eliminates the need for external battery switching circuitry. Verify that the 28-EDIP through-hole package fits the PCB layout constraints and that the 0°C to +70°C operating range meets environmental requirements.

Part Context

This part belongs to the Maxim Integrated RTC family, specifically designed as a phantom time chip. Unlike standard RTCs, it integrates timekeeping directly into the SRAM or NVRAM structure, simplifying system design by removing dedicated RTC components and associated power management logic.

Replacement Considerations

Direct replacements must maintain parallel interface compatibility and 28-EDIP packaging. Check for equivalent phantom chip functionality to ensure no additional hardware changes are needed. Verify voltage and temperature specifications match the original design parameters.