DS1673S-5+

Real Time Clock Overview

The DS1673S-5+ is a portable system controller in a 20-pin SO package, operating at +5.0V with a range of 4.5V to 5.5V across 0°C to +70°C. It integrates a real-time clock (RTC) with leap year compensation, a microprocessor monitor, NV SRAM control, and a 3-channel, 8-bit ADC. Communication utilizes a 3-wire serial interface. The device provides automatic battery backup and write protection for external SRAM via VCCO, CEOL, and CEOH pins. It features an alarm interrupt for system wake-up and watchdog timer functionality.

Real Time Clock Feature Summary

• Integrates RTC, NV SRAM controller, microprocessor monitor, and 3-channel 8-bit ADC
• Supports 3-wire serial interface for data communication
• Provides automatic battery backup and write protection for external SRAM
• Includes microprocessor monitor with power-fail detection and watchdog timer

Real Time Clock Applications

• Low-power portable products requiring integrated system control
• Battery-powered instruments needing real-time tracking and monitoring
• Microprocessor-based systems requiring NV RAM management and reset control

Real Time Clock Procurement Notes

Verify the specific suffix 'S-5+' against the official datasheet to confirm the 20-pin SO package and +5.0V operation. Confirm lead-free/RoHS compliance status as indicated by the '+' designation. Check current availability as this component may be subject to discontinuation or limited supply conditions.

Real Time Clock Selection Notes

Select the DS1673S-5+ when a +5.0V supply is required alongside integrated RTC, NV SRAM control, and ADC functions. Ensure the application supports a 3-wire serial interface. Verify that the external SRAM requirements align with the chip-enable outputs (CEOL/CEOH) and voltage levels provided by the VCCO pin.

Real Time Clock Part Context

The DS1673 series serves as a portable system controller combining multiple functions into a single chip. The 'S' indicates the SO package, while '5' denotes +5.0V operation. The '+' suffix signifies lead-free/RoHS compliance. This part is designed for low-power applications, integrating timekeeping, memory control, and analog conversion capabilities.

Real Time Clock Replacement Considerations

Consult the manufacturer's documentation for direct replacements or pin-compatible alternatives. Consider the DS1673E-5+ for TSSOP packaging or DS1673S-3+ for +3.0V operation if voltage or package differences are acceptable. Verify functional equivalence regarding the 3-wire interface and SRAM control logic.