DS1501YE+

Real Time Clock Overview

The DS1501YE+ is a Y2K-compliant real-time clock/calendar integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It features a parallel interface, 256 bytes of battery-backed NV SRAM, and operates at +5V. The device provides century, year, month, date, day, hours, minutes, and seconds data in BCD format with automatic leap-year compensation valid to the year 2100. Key specifications include a maximum active supply current of 15 mA at 5V, a standby current of 5 mA, and an operating temperature range of -40°C to +85°C.

Real Time Clock Feature Summary

• Y2K-Compliant RTC with Century Register and Automatic Leap-Year Compensation
• 256 Bytes Battery-Backed NV SRAM with Auxiliary Battery Input (VBAUX)
• Programmable Watchdog Timer and Day-of-Week/Date Alarm
• +5V Operation with Precision Power-On Reset and Power-Control Circuitry

Real Time Clock Applications

• Remote Systems
• Battery-Backed Systems
• Telecom Switches
• Office Equipment
• Consumer Electronics

Real Time Clock Procurement Notes

Verify the specific package type for the 'E' suffix against official documentation, as standard listings often show TSOP or SOIC variants. Confirm lead-free/RoHS compliance status associated with the '+' designation. Check for availability of the exact voltage variant, as the datasheet primarily details WE+ (3.3V) and generic Y (5V) options.

Real Time Clock Selection Notes

Select this component for systems requiring a standalone 5V RTC with parallel access and integrated watchdog functionality. Ensure the design accommodates the 256-byte NV SRAM and utilizes the auxiliary battery input (VBAUX) if kickstart or square-wave features are needed during power loss. Verify crystal load capacitance requirements (6pF or 12.5pF) match the selected external oscillator.

Real Time Clock Part Context

The DS1501YE+ belongs to the DS1501/DS1511 family of Y2K-compliant watchdog real-time clocks. While the DS1511 is a standalone module with an embedded battery and crystal, the DS1501 is a chip-only solution requiring external components. The 'Y' suffix denotes the +5V operation variant, distinct from the 'W' series which supports +3.3V.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.