DS1344D-18+T&R

Product Overview

Category

The DS1344D-18+T&R belongs to the category of integrated circuits (ICs).

Use

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

Characteristics

• The DS1344D-18+T&R is a low-power, serial-interface, real-time clock chip.
• It operates at a voltage range of 2.97V to 5.5V.
• This IC offers accurate timekeeping and calendar functions.
• It has a built-in power sense circuitry that detects power failures and automatically switches to backup power.
• The DS1344D-18+T&R features a programmable square-wave output signal.

Package

The DS1344D-18+T&R comes in a small 8-pin TDFN package.

Essence

The essence of this product lies in its ability to provide precise timekeeping and calendar functions with low power consumption.

Packaging/Quantity

The DS1344D-18+T&R is typically packaged in tape and reel format, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 2.97V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Clock Accuracy: ±2ppm from -40°C to +85°C
• Timekeeping Current: 1.3μA (typical)
• Backup Supply Current: 600nA (typical)

Detailed Pin Configuration

The DS1344D-18+T&R has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. SDA: Serial data input/output
4. SCL: Serial clock input
5. SQW/INTB: Square wave output or interrupt output
6. VBAT: Backup power supply input
7. NC: No connection
8. NC: No connection

Functional Features

1. Real-Time Clock: The DS1344D-18+T&R provides accurate timekeeping with a built-in oscillator and counter.
2. Calendar Functions: It includes date, month, year, and day-of-the-week functions.
3. Power Sense Circuitry: This feature detects power failures and automatically switches to backup power, ensuring uninterrupted operation.
4. Programmable Square-Wave Output: The IC can generate a square-wave signal with programmable frequency and duty cycle.

Advantages and Disadvantages

Advantages

• Low power consumption
• Accurate timekeeping
• Automatic power failure detection
• Small package size

Disadvantages

• Limited number of pins for additional functionalities
• Requires an external backup power source

Working Principles

The DS1344D-18+T&R operates by utilizing an internal oscillator to keep track of time. It counts the oscillations to maintain an accurate time base. The chip also incorporates power sense circuitry that monitors the main power supply and switches to the backup power source in case of power failure.

Detailed Application Field Plans

The DS1344D-18+T&R is commonly used in various applications, including:

1. Consumer Electronics: Used in digital cameras, portable media players, and handheld gaming devices to provide accurate timekeeping functionality.
2. Industrial Automation: Integrated into industrial control systems to synchronize time-sensitive operations and log events accurately.
3. Automotive: Employed in automotive electronics for applications such as dashboard clocks and event logging.
4. Medical Devices: Utilized in medical equipment to ensure precise timekeeping for scheduling and data recording purposes.

Detailed and Complete Alternative Models

1. DS3231: A highly accurate RTC module with temperature compensation and alarm functions.
2. PCF8563: An RTC chip with integrated temperature sensor and programmable alarms.
3. MCP7940N: A low-power RTC IC with battery backup and I2C interface.

These alternative models offer similar functionalities to the DS1344D-18+T&R and can be considered as alternatives based on specific requirements.

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