DS1501YZ+T&R

Real Time Clock Overview

The DS1501YZ+T&R is a Y2K-compliant real-time clock/calendar IC manufactured by Analog Devices/Maxim Integrated. It features a parallel interface, 256 bytes of NV SRAM, and operates on a +5V supply (4.5V to 5.5V). The device provides century, year, month, date, day, hours, minutes, and seconds data in 24-hour BCD format with automatic leap-year compensation valid until 2100. Key electrical parameters include a maximum active supply current of 15mA at 5V, standby currents up to 5mA, and battery voltage operation between 2.5V and 3.7V. It includes a programmable watchdog timer, RTC alarm, power-on reset, and battery monitors.

Real Time Clock Feature Summary

• Y2K-Compliant RTC with automatic leap-year compensation valid to 2100
• 256 Bytes Battery-Backed NV SRAM
• Parallel Interface with Byte-Wide Access
• Programmable Watchdog Timer and RTC Alarm
• +5V Operation (4.5V to 5.5V)

Real Time Clock Applications

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

Real Time Clock Procurement Notes

Verify the specific suffix 'YZN' against the official datasheet ordering table, as it is not explicitly listed for the DS1501 family in the provided documentation. Confirm RoHS compliance status and lead-free designation (+) requirements. Check for availability restrictions or limited supply conditions associated with this component variant.

Real Time Clock Selection Notes

Select the DS1501YZ+T&R for systems requiring a standalone RTC with integrated SRAM and a parallel interface. Ensure the design supports +5V logic levels and accommodates the 28-pin SOIC package. Verify crystal selection matches the 6pF or 12.5pF load capacitance settings via the CS bit. Consider the auxiliary battery input (VBAUX) if kickstart or square-wave functions are needed during battery backup.

Real Time Clock Part Context

The DS1501 series represents full-function real-time clocks from Maxim Integrated, now part of Analog Devices. The DS1501 is the chip version, while the DS1511 is an encapsulated module with an embedded battery and crystal. This component belongs to the Y2K-compliant watchdog real-time clock family, designed for reliable timekeeping in battery-backed environments.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult the manufacturer's errata page or distributor databases for cross-references.