DS1685QN-5/T&R

Product Overview

Category

The DS1685QN-5/T&R belongs to the category of integrated circuits (ICs).

Use

This product is primarily used for real-time clock (RTC) applications.

Characteristics

• The DS1685QN-5/T&R is a low-power, serial alarm RTC with a built-in power sense circuit.
• It operates in a wide voltage range and has a low standby current consumption.
• The device offers accurate timekeeping and alarm functions.
• It is designed to be easily integrated into various electronic systems.

Package

The DS1685QN-5/T&R is available in a small outline package (SOIC) format.

Essence

The essence of this product lies in its ability to provide reliable real-time clock functionality with low power consumption.

Packaging/Quantity

The DS1685QN-5/T&R is typically packaged in reels and comes in quantities of 2500 units per reel.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Clock Accuracy: ±2 minutes per month at 25°C
• Alarm Output: Open-drain, active-low
• Serial Interface: I²C-compatible

Detailed Pin Configuration

1. VCC - Power supply input
2. GND - Ground
3. SDA - Serial data line
4. SCL - Serial clock line
5. INT - Interrupt output
6. SQW/OUT - Square wave output
7. RST - Reset input
8. X1 - Crystal oscillator input
9. X2 - Crystal oscillator output
10. NC - No connection

Functional Features

• Real-time clock with calendar functionality
• Programmable alarm with interrupt output
• Power sense circuit for detecting power failures
• Battery backup for timekeeping during power loss
• Square wave output for system timing purposes

Advantages and Disadvantages

Advantages

• Low power consumption
• Accurate timekeeping
• Wide operating voltage range
• Compact package size
• Easy integration into electronic systems

Disadvantages

• Clock accuracy may be affected by temperature variations
• Limited quantity per reel (2500 units)

Working Principles

The DS1685QN-5/T&R operates based on an internal oscillator that keeps track of time. It utilizes a crystal oscillator for accurate timekeeping. The device can be programmed to trigger alarms at specific times, generating an interrupt output signal. In the event of a power failure, the power sense circuit detects it and switches to battery backup mode, ensuring uninterrupted timekeeping.

Detailed Application Field Plans

The DS1685QN-5/T&R is commonly used in various applications, including:

1. Consumer electronics: Used in digital clocks, home appliances, and personal electronic devices.
2. Industrial automation: Integrated into control systems, data loggers, and industrial timers.
3. Automotive: Employed in car audio systems, dashboard displays, and vehicle tracking devices.
4. Medical equipment: Utilized in patient monitoring systems, medical timers, and diagnostic devices.

Detailed and Complete Alternative Models

1. DS3231 - A highly accurate RTC with temperature compensation.
2. PCF8563 - An I²C-bus RTC with alarm and timer functionality.
3. MCP7940N - A low-power RTC with battery backup and SRAM.
4. DS1307 - A popular RTC with simple interface and low cost.

These alternative models offer similar functionalities to the DS1685QN-5/T&R and can be considered as alternatives depending on specific requirements.

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