DS1244YP-70+

Overview

The DS1244YP-70+ is a 32K x 8 nonvolatile SRAM with an integrated phantom real-time clock, manufactured by Analog Devices Inc./Maxim Integrated. It operates within a 4.5V to 5.5V supply range and features a 70ns access time. The component utilizes a 34-PowerCap Module package for surface mount installation. It includes an embedded lithium energy source that maintains calendar operation and retains RAM data during power failures. The device supports automatic leap year compensation up to the year 2100 and provides over 10 years of data retention in the absence of power.

Feature Summary

• Integrates 32K x 8 NV SRAM with a phantom real-time clock tracking hundredths of seconds through years.
• Features a replaceable external PowerCap (DS9034PCX+) containing the battery and crystal, enabling surface mount processing without thermal damage.
• Provides automatic leap year compensation valid up to 2100 and over 10 years of data retention.
• Supports 12-hour or 24-hour time formats with AM/PM indicators.

Applications

• Systems requiring nonvolatile memory with precise timekeeping capabilities.
• Applications needing surface-mountable RTC solutions with replaceable battery modules.
• Industrial or commercial equipment operating between 0°C and +70°C.

Procurement Notes

Verify the inclusion of the required PowerCap module (DS9034PCX+ or DS9034I-PCX+) as it is ordered separately. Confirm the specific voltage variant matches the system requirements, as this model specifies a 5.0V supply range. Ensure the 34-pin PowerCap footprint aligns with the PCB design constraints.

Selection Notes

Select the DS1244YP-70+ when a surface-mount package is preferred over the traditional EDIP DIP module. This version requires the separate mounting of the PowerCap after soldering to protect the internal components from reflow temperatures. Compare against the DS1244Y-70+ if a fully integrated single-package solution is acceptable and wave soldering is used instead of reflow.

Part Context

This component belongs to the DS1244 series of 256K NV SRAMs with phantom clocks. The 'P' suffix denotes the PowerCap module package, distinguishing it from the standard EDIP DIP packages like the DS1244Y-70+. It is pin-for-pin compatible with other PowerCap variants such as the DS1248P and DS1251P.

Replacement Considerations

The DS1244YP-70+ is pin-for-pin compatible with the DS1248P and DS1251P PowerCap modules. When replacing, ensure the substitute part supports the same 34-pin PowerCap interface and 5V operating voltage.