DS1374U-18

Real Time Clock Overview

The DS1374U-18 is a Real-Time Clock (RTC) IC manufactured by Analog Devices Inc./Maxim Integrated. It features an I2C serial interface and utilizes a 32-bit binary counter for timekeeping. The device includes a watchdog timer, a trickle charger for battery backup, and a reset input/output pin. It operates within a supply voltage range of 1.71 V to 5.5 V and supports a working temperature range from -40°C to +85°C. The component is housed in a 10-TFSOP or 10-MSOP package with a width of 3.00 mm.

Real Time Clock Feature Summary

• Integrates a 32-bit binary counter for precise real-time tracking
• Includes a watchdog timer for system reliability monitoring
• Features a trickle charger to maintain backup power sources
• Provides a dedicated reset input/output pin for system control

Real Time Clock Applications

• Industrial systems requiring robust timekeeping
• Consumer electronics with low-voltage operation needs
• Embedded devices utilizing I2C communication buses
• Applications necessitating watchdog timer functionality

Real Time Clock Procurement Notes

Verify the specific suffix and manufacturer designation carefully, as availability varies significantly across distributors. Some listings indicate limited supply or end-of-life status. Confirm RoHS compliance and package type (10-TFSOP/10-MSOP) against your bill of materials. Cross-reference part numbers such as DS1374U-18+ to ensure exact functional equivalence before procurement.

Real Time Clock Selection Notes

Select this component when an I2C interface is required alongside a binary counter format rather than BCD. It is suitable for designs needing integrated reset control and watchdog capabilities without external components. Ensure the operating voltage aligns with the 1.71 V to 5.5 V range. Consider the 10-pin surface-mount package constraints during PCB layout planning.

Real Time Clock Part Context

This part belongs to the Maxim Integrated RTC family, designed for low-power timekeeping applications. It complements other series like the DS1391 and DS1392 but distinguishes itself through its specific binary counter architecture and integrated reset/wdog features. It serves as a compact solution for maintaining accurate time in battery-backed systems.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing firmware due to potential differences in register maps between similar RTC families.