DS1673E-5+T&R

Real Time Clock Overview

The DS1673E-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). It operates on +5.0V with a battery backup input for continuous timekeeping and data retention. The device features a simple 3-wire serial interface for communication. Key functions include leap year compensation up to the year 2100, an alarm interrupt for system wake-up, automatic SRAM write protection during power failures, and watchdog timer capabilities. It is housed in a 20-pin TSSOP package.

Real Time Clock Feature Summary

• Integrates RTC with calendar, alarm, and watchdog timer
• Provides NV SRAM control with automatic backup switching
• Includes 3-channel, 8-bit ADC with internal reference
• Microprocessor monitor with pushbutton reset capability

Real Time Clock Applications

• Portable system controllers requiring low-power operation
• Battery-backed memory systems needing automatic write protection
• Embedded devices utilizing analog sensor inputs via integrated ADC
• Microprocessor-based systems requiring power-fail detection and reset

Real Time Clock Procurement Notes

Verify that the specific ordering suffix 'T&R' corresponds to the tape-and-reel packaging format as indicated in the manufacturer's ordering information table. Confirm compatibility with the +5.0V supply voltage requirement specified for this variant. Ensure the 20-pin TSSOP footprint matches the design layout. Check for lead-free/RoHS compliance status associated with the '+' designation in the part number.

Real Time Clock Selection Notes

Select this component when a combined solution for timekeeping, memory protection, and analog monitoring is required. The +5.0V operating range distinguishes it from the +3.0V variant. Consider the 3-wire interface complexity versus parallel alternatives if pin count is constrained. Evaluate the need for the integrated watchdog and ADC against discrete component solutions to optimize board space and power consumption.

Real Time Clock Part Context

This part belongs to the DS1673 family of portable system controllers. The 'E' suffix denotes the extended temperature range of 0°C to +70°C. The '+5' indicates the +5.0V nominal supply voltage version. The 'T&R' suffix specifies the reel packaging format, differing from the tube packaging of the standard DS1673E-5+. It serves as a comprehensive subsystem controller for embedded applications.

Real Time Clock Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should verify pinout and register compatibility if considering alternative RTC or system controller ICs from other manufacturers.