DS1284Q

Product Overview

Category

DS1284Q belongs to the category of integrated circuits (ICs).

Use

The DS1284Q is primarily used as a real-time clock (RTC) and calendar. It provides accurate timekeeping and date tracking functionality.

Characteristics

• High precision timekeeping
• Battery backup for continuous operation
• Non-volatile memory for data storage
• Low power consumption
• Small form factor

Package

The DS1284Q comes in a compact package, suitable for surface mount technology (SMT) applications. It is available in a 16-pin SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of DS1284Q lies in its ability to accurately keep track of time and date, even during power outages or system shutdowns.

Packaging/Quantity

The DS1284Q is typically packaged in reels or tubes, containing a specified quantity of ICs per package. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Supply Voltage: 2.7V to 5.5V
• Timekeeping Accuracy: ±2 minutes per month at 25°C
• Operating Temperature Range: -40°C to +85°C
• Data Retention: Over 10 years
• Clock Output Frequency: 32.768 kHz

Detailed Pin Configuration

The DS1284Q has a total of 16 pins, each serving a specific function. The pin configuration is as follows:

1. VCC - Power supply voltage input
2. GND - Ground reference
3. X1 - Crystal oscillator input
4. X2 - Crystal oscillator output
5. SQW - Square wave output
6. RST - Reset input
7. A0 - Address input bit 0
8. A1 - Address input bit 1
9. A2 - Address input bit 2
10. SDA - Serial data input/output
11. SCL - Serial clock input
12. VBAT - Battery backup voltage input
13. NC - No connection
14. NC - No connection
15. NC - No connection
16. NC - No connection

Functional Features

• Real-time clock with calendar functionality
• Automatic leap year compensation
• Alarm and timer functions
• Programmable square wave output
• Battery backup for continuous operation
• Serial interface for communication with microcontrollers

Advantages and Disadvantages

Advantages

• Accurate timekeeping and date tracking
• Low power consumption
• Small form factor
• Battery backup ensures uninterrupted operation
• Easy integration with microcontroller systems

Disadvantages

• Limited memory capacity for data storage
• Relatively higher cost compared to simpler RTC modules
• Requires external crystal oscillator for accurate timekeeping

Working Principles

The DS1284Q utilizes an internal quartz crystal oscillator to generate a precise time base. It maintains the time and date information using a non-volatile memory, which is powered by an onboard battery when the main power supply is disconnected. The IC communicates with external microcontrollers through a serial interface, allowing for easy integration into various applications.

Detailed Application Field Plans

The DS1284Q finds applications in various fields where accurate timekeeping and date tracking are essential. Some of the potential application areas include:

1. Embedded systems
2. Industrial automation
3. Medical devices
4. Automotive electronics
5. Consumer electronics

Detailed and Complete Alternative Models

1. DS1307 - Similar real-time clock module with I2C interface
2. PCF8563 - RTC module with integrated temperature compensation
3. MCP7940N - Real-time clock/calendar with battery switchover capability

These alternative models offer similar functionality to the DS1284Q and can be considered as alternatives based on specific requirements.

In conclusion, the DS1284Q is a highly reliable real-time clock and calendar IC that provides accurate timekeeping and date tracking functionality. Its small form factor, low power consumption, and battery backup make it suitable for a wide range of applications in various industries.