DS1284Q/T&R

Product Overview

• Category: Integrated Circuit
• Use: Real-Time Clock (RTC)
• Characteristics:
  • Low power consumption
  • High accuracy timekeeping
  • Non-volatile memory for data storage
• Package: QFN-16
• Essence: A real-time clock IC designed for accurate timekeeping in various electronic devices.
• Packaging/Quantity: Tape and Reel, 2500 units per reel.

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
• Battery Backup Voltage: 1.8V to 5.5V
• Memory: 64 bytes of non-volatile RAM
• I/O Interface: SPI (Serial Peripheral Interface)

Detailed Pin Configuration

The DS1284Q/T&R has a total of 16 pins arranged as follows:

1. VCC - Power supply input
2. GND - Ground
3. SCLK - Serial Clock input
4. SI - Serial Data input
5. SO - Serial Data output
6. CS - Chip Select input
7. RST - Reset input
8. SQW/INT - Square Wave/Interrupt output
9. X1 - Crystal oscillator input
10. X2 - Crystal oscillator output
11. VBAT - Battery backup input
12. NC - No Connection
13. NC - No Connection
14. NC - No Connection
15. NC - No Connection
16. NC - No Connection

Functional Features

• Accurate timekeeping with low power consumption.
• Battery backup ensures timekeeping even during power loss.
• Non-volatile memory allows data storage.
• Square wave output for timing applications.
• Interrupt output for triggering events based on time.

Advantages and Disadvantages

Advantages: - High accuracy timekeeping. - Low power consumption. - Non-volatile memory for data storage. - Wide operating temperature range.

Disadvantages: - Limited memory capacity (64 bytes). - Requires an external crystal oscillator for accurate timekeeping.

Working Principles

The DS1284Q/T&R utilizes a crystal oscillator to generate precise clock signals. It uses this clock signal to keep track of time accurately. The IC also includes non-volatile RAM, which allows the storage of important data even when the power is disconnected. The battery backup feature ensures uninterrupted timekeeping during power outages.

Detailed Application Field Plans

The DS1284Q/T&R is widely used in various electronic devices that require accurate timekeeping. Some common application fields include:

1. Consumer Electronics: Used in digital watches, clocks, and timers.
2. Industrial Automation: Integrated into control systems for accurate time synchronization.
3. Automotive: Incorporated into car dashboards for displaying accurate time.
4. Medical Devices: Utilized in medical equipment that requires precise time tracking.
5. Communication Systems: Integrated into network devices for time-sensitive operations.

Detailed and Complete Alternative Models

1. DS3231 - Real-Time Clock with I2C interface.
2. PCF8563 - Real-Time Clock with I2C interface and alarm functionality.
3. MCP7940N - Real-Time Clock with I2C interface and battery switchover.

These alternative models offer similar functionalities and can be considered as alternatives to the DS1284Q/T&R depending on specific requirements.

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