DS1500Y

Real Time Clock Overview

The DS1500Y is a Y2K-compliant real-time clock (RTC) and calendar IC manufactured by Analog Devices Inc./Maxim Integrated. It features a byte-wide parallel interface, 256 bytes of nonvolatile SRAM, and automatic leap-year compensation valid through the year 2100. The device operates on a +5V supply with a range of 4.5V to 5.5V, drawing a maximum standby current of 5mA. It includes programmable watchdog timers, alarms, power-on reset, and battery monitoring capabilities.

Real Time Clock Feature Summary

• BCD-coded timekeeping with automatic leap-year correction up to 2100
• Integrated 256-byte nonvolatile SRAM for data retention
• Programmable watchdog timer and time-of-day alarm functions
• Automatic battery backup switching and write protection for external SRAM

Real Time Clock Applications

• Remote systems requiring precise timekeeping
• Battery-backed embedded systems
• Telecom switches
• Office equipment
• Consumer electronics

Real Time Clock Procurement Notes

Verify the specific package variant when ordering, as suffixes indicate different form factors. The 'Y' designation confirms a 5.0V operating voltage. Confirm RoHS compliance status based on the '+' suffix if required by manufacturing standards. Check for industrial temperature range availability if operation outside commercial limits is needed.

Real Time Clock Selection Notes

Select this component for applications requiring a parallel interface RTC with integrated memory. Ensure the system design supports the 32-pin package type associated with the base model. Verify that the +5V logic levels are compatible with the host microcontroller or bus architecture. Consider the auxiliary battery input if kickstart or square-wave output functionality during power loss is required.

Real Time Clock Part Context

The DS1500 belongs to the Maxim Integrated/Analog Devices RTC family, which also includes variants like the DS1501 and DS1511. These devices share similar core functionalities but differ in pin counts and package types. The DS1500 specifically utilizes a 32-pin configuration to accommodate its extensive feature set and onboard memory.

Real Time Clock Replacement Considerations

Direct replacements include other members of the DS1500 series such as the DS1500YE+ or DS1500YEN+. Cross-model substitutes like the DS1501 require verification of pin compatibility due to differing package sizes.