DS1501YEN+T&R

Real Time Clock Overview

The DS1501YEN+T&R is a Y2K-compliant real-time clock/calendar with a parallel interface, packaged in a 28-pin TSOP. It operates at +5V and supports an industrial temperature range of -40°C to +85°C. The device includes a watchdog timer, power-on reset, battery monitors, and 256 bytes of NV SRAM. Time data is stored in BCD format with automatic leap-year compensation valid until 2100. It features programmable alarms, a 32.768kHz output, and auxiliary battery inputs for kickstart functionality.

Real Time Clock Feature Summary

• Year 2000 compliant RTC with automatic leap-year correction
• 256-byte battery-backed NV SRAM
• Programmable watchdog timer and time-of-day alarm
• +5V operation with -40°C to +85°C industrial temperature range

Real Time Clock Applications

• Remote systems
• Battery-backed systems
• Telecom switches
• Office equipment
• Consumer electronics

Real Time Clock Procurement Notes

Verify the specific suffix 'E' against official documentation, as standard listings typically show 'W' (3.3V) or 'Y' (5V). Confirm RoHS compliance status and lead-free markings on the top mark. Check for availability restrictions or end-of-life notices from Analog Devices/Maxim Integrated distributors.

Real Time Clock Selection Notes

Select this part for applications requiring a standalone 5V RTC with parallel access. Ensure the system design accommodates the 28-pin TSOP package. Verify that the external crystal matches the specified load capacitance (6pF or 12.5pF) via the CS bit configuration for optimal accuracy.

Real Time Clock Part Context

This component belongs to the DS1501/DS1511 family of Y2K-compliant watchdog real-time clocks. The DS1501 is the chip version, while the DS1511 is an encapsulated module with an embedded battery. The 'Y' designation indicates 5V operation, distinguishing it from the 3.3V 'W' variant.

Real Time Clock Replacement Considerations

The DS1501WE+T&R serves as a 3.3V alternative within the same package. For DIP packages, consider the DS1501Y+. Verify pin compatibility and voltage levels before substitution.