DS17485SN-5

Product Overview

Category: Integrated Circuit (IC)

Use: The DS17485SN-5 is a digital integrated circuit primarily used for real-time clock (RTC) applications. It provides accurate timekeeping and calendar functions.

Characteristics: - Low power consumption - High accuracy - Small form factor - Wide operating temperature range - Battery backup support

Package: The DS17485SN-5 is available in a small outline package (SOP) with 8 pins.

Essence: This IC is designed to provide reliable and precise timekeeping functionality in various electronic devices.

Packaging/Quantity: The DS17485SN-5 is typically sold in reels containing multiple units, with each reel containing a specific quantity of ICs.

Specifications

The DS17485SN-5 has the following specifications:

• Supply Voltage: 2.7V to 5.5V
• Timekeeping Accuracy: ±2 minutes per month
• Operating Temperature Range: -40°C to +85°C
• Clock Frequency: 32.768 kHz
• Data Retention: Over 10 years
• Interface: Serial I/O (SPI)

Pin Configuration

The DS17485SN-5 features the following pin configuration:

1. VCC - Power supply input
2. GND - Ground connection
3. CLK - Clock input/output
4. DATA - Data input/output
5. RST - Reset input
6. SQW - Square wave output
7. NC - No connection
8. VBAT - Battery backup input

Functional Features

The DS17485SN-5 offers the following functional features:

• Real-time clock with calendar functions
• Alarm capability
• Programmable square wave output
• Battery backup support for uninterrupted timekeeping during power loss
• Automatic leap year compensation
• Power-saving modes for reduced power consumption

Advantages and Disadvantages

Advantages: - High accuracy timekeeping - Low power consumption - Small form factor - Wide operating temperature range - Battery backup support ensures uninterrupted operation

Disadvantages: - Limited number of pins for additional functionalities - Requires external battery for backup functionality

Working Principles

The DS17485SN-5 utilizes a quartz crystal oscillator to generate a precise clock frequency of 32.768 kHz. This clock signal is used to maintain accurate timekeeping and calendar functions. The IC also incorporates non-volatile memory to retain the time and date information during power loss.

Detailed Application Field Plans

The DS17485SN-5 can be utilized in various applications, including but not limited to:

1. Consumer Electronics:

   • Digital watches
   • Alarm clocks
   • Electronic calendars

2. Industrial Automation:

   • Programmable logic controllers (PLCs)
   • Data loggers
   • Time-based control systems

3. Automotive:

   • On-board clocks
   • Dashboard displays
   • Event recorders

4. Medical Devices:

   • Patient monitoring systems
   • Time-stamped data logging

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the DS17485SN-5 include:

1. DS3231 - Real-time clock module with I2C interface
2. PCF8563 - CMOS real-time clock/calendar IC
3. MCP7940N - I2C real-time clock/calendar with SRAM

These alternative models provide comparable timekeeping accuracy and additional features suitable for various applications.

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