DS1673S-5+T&R

Real Time Clock Overview

The DS1673S-5+T&R is a portable system controller integrating a real-time clock (RTC), nonvolatile RAM controller, microprocessor monitor, and a 3-channel, 8-bit analog-to-digital converter (ADC). Operating at +5.0V with a range of 4.5V to 5.5V, it communicates via a 3-wire serial interface. The RTC provides timekeeping with leap year compensation up to the year 2100 and supports system power-on alarms. It manages external SRAM backup through VCCO, CEOL, and CEOH pins, ensuring data retention during power failures. The device includes watchdog timer functionality and pushbutton reset control.

Real Time Clock Feature Summary

• Integrates RTC with alarm interrupt, NV SRAM controller, microprocessor monitor, and 3-channel 8-bit ADC
• Supports automatic battery backup and write protection for external SRAM via VCCO, CEOL, and CEOH pins
• Features microprocessor monitoring including power-fail detection, pushbutton reset, and configurable watchdog timer
• Operates on a simple 3-wire serial interface (CS, SCLK, I/O) with LSB-first data transfer

Real Time Clock Applications

• Low-power portable products requiring integrated system control
• Microprocessor-based systems needing reliable real-time clocking and memory backup
• Applications requiring analog signal monitoring via built-in ADC channels

Real Time Clock Procurement Notes

Verify component authenticity and lead-free status (+ suffix indicates RoHS compliance). Confirm package type is SOIC-Wide-20 and voltage grade is 5.0V. Check for discontinuation notices as this series may be end-of-life. Ensure ordering suffix matches required tape-and-reel packaging specifications.

Real Time Clock Selection Notes

Select the DS1673S-5 variant specifically for +5.0V operation within the 4.5V to 5.5V range. Choose the 'S' suffix for SOIC-20 packaging instead of TSSOP. Verify that the application requires the integrated NV SRAM controller and 3-channel ADC features before choosing this over simpler RTC-only devices.

Real Time Clock Part Context

This part belongs to the DS1673 family of portable system controllers from Analog Devices/Maxim Integrated. The 'S' denotes the SOIC-20 package, while 'E' denotes TSSOP-20. The '-5' specifies the +5.0V operating voltage version. The '+T&R' suffix indicates lead-free/RoHS compliance and tape-and-reel packaging format.

Real Time Clock Replacement Considerations

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