DS1244YP-70

Overview

The DS1244YP-70 is a nonvolatile SRAM integrated with a phantom real-time clock, manufactured by Analog Devices Inc./Maxim Integrated. It provides 32KB of memory (32K x 8) and tracks time including hundredths of seconds, minutes, hours, days, dates, months, and years. The device operates on a 4.5V to 5.5V supply with a maximum current consumption of 10mA at 5V during timing operations. It features automatic leap year compensation valid up to the year 2100 and supports both 12-hour and 24-hour time formats. The component utilizes a parallel interface and is housed in a 34-PowerCap Module package designed for surface mount applications.

Feature Summary

• Integrates 32K x 8 NV SRAM with a phantom clock for timekeeping
• Includes an embedded lithium energy cell for data retention
• Supports automatic leap year compensation through 2100
• Features a replaceable PowerCap module for battery and crystal

Applications

• Systems requiring persistent timekeeping without external components
• Applications needing direct replacement for volatile static RAM or EEPROM
• Surface mount designs requiring board-level battery integration

Procurement Notes

Verify that the separate DS9034PCX+ or DS9034I-PCX+ PowerCap module is included, as it contains the necessary battery and crystal and must be ordered separately. Confirm the specific suffix indicates the 5V operating voltage range and the PowerCap package type. Ensure the design accommodates the surface mount footprint of the 34-pin module.

Selection Notes

Select this part when a surface mount solution is required instead of the standard DIP module. The PowerCap design allows the battery and crystal assembly to be mounted after soldering to protect them from reflow temperatures. Ensure the system voltage remains within the 4.5V to 5.5V range for proper operation and write protection thresholds.

Part Context

This component belongs to the DS1244 series of nonvolatile SRAMs with phantom clocks. The 'P' suffix denotes the PowerCap module package variant, which differs from the EDIP DIP modules like the DS1244Y-70+. It shares the same internal memory architecture and clock functionality but adapts the physical form factor for surface mount technology.

Replacement Considerations

The PowerCap module version is pin-for-pin compatible with the DS1248P and DS1251P devices.