DS1500YEN+

Real Time Clock Overview

The DS1500YEN+ is a Y2K-compliant real-time clock (RTC) and calendar integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It features an 8-bit parallel interface, 256 bytes of nonvolatile SRAM, and operates within a voltage range of 4.5V to 5.5V on the main supply and 2.5V to 3.7V on battery inputs. The device provides timekeeping accuracy better than ±1 minute per month at +25°C and supports an industrial operating temperature range from -40°C to +85°C. Key electrical parameters include a maximum standby current of 5mA at 5V and a typical active supply current of 15mA.

Real Time Clock Feature Summary

• Year 2000 compliant with automatic leap-year compensation valid through 2100
• Integrated 256-byte nonvolatile SRAM with external SRAM backup control
• Programmable watchdog timer and multiple alarm modes
• Precision power-on reset and automatic battery switchover

Real Time Clock Applications

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

Real Time Clock Procurement Notes

Verify that the component matches the specific industrial temperature grade (-40°C to +85°C) and 5V logic requirements. Confirm the presence of the '+' suffix indicates lead-free/RoHS compliance and the 'N' suffix confirms the extended temperature range as specified in the ordering information table.

Real Time Clock Selection Notes

Select this part for applications requiring a parallel interface RTC with integrated nonvolatile memory. Ensure the system design accommodates the 32-pin TSOP package and provides separate VBAT and VBAUX connections if auxiliary battery functions like kickstart or square-wave output during battery backup are required.

Real Time Clock Part Context

This component belongs to the DS1500 family of Y2K Watchdog RTCs with Nonvolatile Control. The 'Y' designation indicates 5V operation, while 'E' denotes the industrial temperature range. The 'N' suffix specifies the extended temperature variant, and the '+' suffix indicates RoHS compliance.

Real Time Clock Replacement Considerations

Datasheet references errata documentation at www.maxim-ic.com/errata for potential deviations in specific revisions. Verify compatibility with existing parallel bus timing constraints when substituting.