DS9034PCX+

Overview

The DS9034PCX+ is a Y2K-compliant real-time clock/calendar and nonvolatile static RAM integrated into a PowerCap module. It combines an RTC, lithium energy source, crystal oscillator, and power-fail control circuit in a single surface-mount package. The device provides 8k x 8 bits of nonvolatile memory with bytewide access. RTC registers are mapped to the uppermost RAM locations, supporting BCD-coded timekeeping through 2099 with automatic leap year compensation. It features low-battery indicators and power-on reset output.

Feature Summary

• Integrates nonvolatile SRAM, real-time clock, crystal, and lithium battery in one module
• Y2K-compliant timekeeping with automatic leap year correction valid through 2099
• Bytewide interface allows identical access to RTC registers and static RAM
• Includes power-fail write protection and low-battery-voltage level indicator

Applications

• Industrial systems requiring precise timekeeping without external components
• Embedded controllers needing nonvolatile data retention during power loss
• Battery-powered devices requiring compact RTC solutions
• Medical equipment with strict compliance requirements for date/time accuracy

Procurement Notes

Verify component authenticity through authorized Analog Devices or Maxim Integrated distributors. Confirm the suffix indicates lead-free status if required by project specifications. Check current availability as this component may be discontinued or subject to long-lead times. Ensure the PowerCap module packaging matches your PCB layout requirements. Validate that the integrated lithium battery meets safety regulations for your target market.

Selection Notes

Select this component when space constraints prevent discrete RTC and battery implementations. The integrated design eliminates external crystal and backup battery requirements. Consider the bytewide interface compatibility with existing microcontroller architectures. Evaluate the 10-year nonvolatile retention period against system maintenance schedules. Verify that the PowerCap module dimensions fit within the designated enclosure area.

Part Context

This part belongs to the DS174x family of Y2K-compliant real-time clocks from Maxim Integrated. The PCX suffix denotes the PowerCap surface-mount module configuration containing the integrated lithium battery and crystal. This family replaces earlier discrete RTC designs by consolidating timing, memory, and power management functions into a single compact package suitable for modern embedded applications.

Replacement Considerations

Pin-for-pin compatible alternatives exist within the DS174x series offering different memory densities. Verify functional equivalence regarding register mapping and interface protocols before substitution. Cross-reference specifications for operating temperature ranges and voltage tolerances. Confirm that replacement modules maintain the same PowerCap form factor for direct board integration.