DS1500YE

Real Time Clock Overview

The DS1500YE is a Y2K-compliant real-time clock (RTC) integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It features a parallel interface and operates within a supply voltage range of 4.5V to 5.5V, with a maximum standby current of 5mA at 5V. The device includes 256 bytes of nonvolatile SRAM, an alarm function, a watchdog timer, and power-on reset capabilities. Timekeeping registers store century, year, month, date, day, hours, minutes, and seconds in BCD format with automatic leap-year compensation valid up to the year 2100. It utilizes a 32.768kHz crystal for timing accuracy better than ±1 minute per month at +25°C.

Real Time Clock Feature Summary

• Y2K-compliant RTC with automatic leap-year compensation valid through 2100
• Integrated 256-byte nonvolatile SRAM with external SRAM backup control
• Programmable watchdog timer and time-of-day/date alarm
• Precision power-on reset and battery voltage-level indicator flags

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 specific unit corresponds to the commercial temperature range (-0°C to +70°C) as indicated by the 'YE' suffix. Confirm lead-free/RoHS compliance status based on the presence of '+' in the ordering designation if applicable. Ensure the parallel interface requirements match the host system's bus architecture before procurement.

Real Time Clock Selection Notes

Select the DS1500YE when a 5V logic interface is required, distinguishing it from the 3.3V DS1500WE variant. Consider the industrial grade DS1500YEN+ if operation below 0°C or above 70°C is necessary. Verify that the 32-pin TSOP package dimensions fit the PCB layout constraints.

Real Time Clock Part Context

The DS1500YE belongs to the Maxim Integrated DS1500 family of real-time clocks. It shares functional similarities with other members like the DS1500WE (3.3V) and DS1500YEN+ (industrial temp). The 'Y' indicates 5V operation, while 'E' denotes the commercial temperature range and TSOP package.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers: DS1500WE+, DS1500WEN+, DS1500YEN+. Note that DS1500WE variants operate at 3.3V and require voltage level verification.