Professional IC Distribution & Technical Solutions

The DS1558W+TR is a real-time clock (RTC) module manufactured by Maxim Integrated (now part of Analog Devices). Below are its key specifications, descriptions, and features:

Specifications:

• Manufacturer: Maxim Integrated (MAXIM)
• Part Number: DS1558W+TR
• Type: Real-Time Clock (RTC)
• Interface: I²C (2-wire serial)
• Timekeeping Accuracy: ±2ppm (±0.1728 seconds/day) from 0°C to +40°C
• Operating Voltage: 2.97V to 5.5V
• Battery Backup Voltage: 2.0V to 3.7V (supports lithium or supercapacitor)
• Clock Frequency: 32.768kHz
• Timekeeping Current (Typical): 500nA (battery mode)
• Operating Temperature Range: -40°C to +85°C
• Package: 20-pin SOIC (Wide)

Descriptions:

The DS1558W+TR is a low-power RTC module with an integrated crystal oscillator, providing accurate timekeeping with battery backup support. It includes a built-in temperature-compensated crystal oscillator (TCXO) to maintain high accuracy over a wide temperature range. The device features an I²C interface for communication with a host microcontroller.

Features:

• Integrated Crystal Oscillator: Eliminates the need for an external crystal.
• Battery Backup Support: Operates from a primary power source or a backup battery.
• Automatic Switchover: Seamlessly transitions between primary and backup power.
• Temperature Compensation: Ensures high accuracy across varying temperatures.
• Low Power Consumption: Optimized for battery-powered applications.
• Programmable Square-Wave Output: Configurable frequency output (1Hz to 32.768kHz).
• Alarm Functionality: Supports programmable time-of-day alarms.
• Non-Volatile SRAM: Optional 4KB of battery-backed SRAM (varies by variant).
• Industrial Temperature Range: Suitable for harsh environments.

This device is commonly used in applications requiring precise timekeeping, such as industrial systems, medical devices, and embedded computing.