DS1375T+T&R

Real Time Clock Overview

The DS1375T+T&R is a low-power digital real-time clock (RTC) manufactured by Analog Devices Inc./Maxim Integrated. It maintains seconds, minutes, hours, day, date, month, and year information with automatic leap-year compensation valid up to the year 2100. The device operates from a digital clock input pin at frequencies of 32.768kHz, 8.192kHz, 60Hz, or 50Hz, eliminating the need for an internal crystal. It features a fast 400kHz I2C interface, two programmable alarms, a programmable square-wave output, and 16 bytes of SRAM. Operating voltage ranges from 1.7V to 5.5V, with a standby current of 150nA to 500nA.

Real Time Clock Feature Summary

• Digital Input RTC: Operates from external CLK pin at 32.768kHz, 8.192kHz, 60Hz, or 50Hz without requiring an onboard crystal.
• Calendar & Alarm: Counts time with leap-year compensation; includes two programmable time-of-day/date alarms and a programmable square-wave output.
• I2C Interface: Supports standard (100kHz) and fast (400kHz) mode bidirectional serial communication via SDA and SCL pins.
• SRAM Storage: Provides 16 bytes of battery-backed SRAM for user data storage.

Real Time Clock Applications

• RTC complement to TCXOs
• Utility meters
• Appliances
• Consumer electronics
• Automotive systems

Real Time Clock Procurement Notes

Verify the package type is TDFN-EP (6-pin) and the temperature range is -40°C to +85°C. Confirm the ordering suffix '+T&R' indicates tape-and-reel packaging. Ensure the source document matches the official Maxim Integrated datasheet Rev 2 (9/08). Check RoHS compliance status as indicated in the manufacturer's documentation.

Real Time Clock Selection Notes

Select this component when a crystal-less RTC solution is required using an existing system clock source. It is suitable for designs needing dual alarms and SRAM within a small 3mm x 3mm footprint. Verify that the system provides a clean square wave signal on the CLK pin within the specified duty cycle requirements.

Real Time Clock Part Context

The DS1375T+T&R belongs to the DS1375 series of digital RTCs. The 'T+' suffix denotes a lead-free/RoHS-compliant package, while '+T&R' specifies the reel packaging format. It is part of the Maxim Integrated product line, now under Analog Devices Inc.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's website for current cross-reference information.