DS1374C-3#T&R

Real Time Clock Overview

The DS1374C-3#T&R is a real-time clock IC featuring a 32-bit binary counter for continuous timekeeping. It includes an integrated 32.768kHz crystal, eliminating the need for external components. The device supports I²C serial communication and provides a secondary 24-bit counter configurable as an alarm or watchdog timer. It operates within a supply voltage range of 2.7V to 3.3V and features automatic power-fail detection with seamless switching to a backup supply. The component is housed in a 16-pin SO package.

Real Time Clock Feature Summary

• Integrated 32.768kHz crystal for compact design
• I²C serial interface for data access
• Automatic power-fail detection and switch circuitry
• Configurable watchdog/alarm counter or NV RAM

Real Time Clock Applications

• Portable Instruments
• Point-of-Sale Equipment
• Medical Equipment
• Telecommunications

Real Time Clock Procurement Notes

Verify the specific ordering suffix #T&R corresponds to tape-and-reel packaging when sourcing. Confirm that the -3 voltage variant matches the system's 3.0V nominal requirement. Ensure the 16-pin SO footprint aligns with the PCB layout specifications.

Real Time Clock Selection Notes

Select this model over the DS1374U series if a 16-pin SO package is required instead of a 10-pin µSOP. The integrated crystal simplifies board space constraints compared to discrete crystal solutions. Verify compatibility with the target I²C bus speed, supporting both standard (100kHz) and fast mode (400kHz).

Real Time Clock Part Context

This part belongs to the DS1374 family of real-time clocks manufactured by Maxim Integrated, now part of Analog Devices Inc. The 'C' designation indicates the inclusion of an integrated crystal, while the '-3' specifies the 3.0V operating voltage range. The '#T&R' suffix denotes the reel packaging format.

Real Time Clock Replacement Considerations

The DS1374C-33#T&R serves as a direct functional substitute for systems requiring a 3.3V supply voltage instead of 3.0V. Other variants in the DS1374 family share the same pinout and register map but differ in package type or voltage rating.