DS12885S+T&R

Product Overview

Category: Integrated Circuit (IC)

Use: Real-Time Clock (RTC) Module

Characteristics: - Small form factor - Low power consumption - High accuracy timekeeping - Non-volatile memory for data storage - I2C interface for communication

Package: Surface Mount Technology (SMT)

Essence: The DS12885S+T&R is a real-time clock module that provides accurate timekeeping and non-volatile memory for data storage in various electronic devices.

Packaging/Quantity: The DS12885S+T&R is available in tape and reel packaging, with a quantity of 250 units per reel.

Specifications

• Supply Voltage: 2.97V to 5.5V
• Timekeeping Accuracy: ±2 minutes per month at 25°C
• Operating Temperature Range: -40°C to +85°C
• Memory Size: 114 bytes
• I2C Bus Frequency: Up to 400kHz

Detailed Pin Configuration

The DS12885S+T&R has a total of 16 pins, which are as follows:

1. VCC: Power supply voltage input
2. GND: Ground reference
3. SDA: Serial Data Line for I2C communication
4. SCL: Serial Clock Line for I2C communication
5. SQW/INT: Square Wave Output / Interrupt output
6. RST: Reset input
7. X1: Crystal oscillator input
8. X2: Crystal oscillator output
9. NC: No connection
10. VBAT: Battery backup input
11. VBATGND: Ground reference for battery backup
12. VCC2: Power supply voltage input for battery backup
13. NC: No connection
14. NC: No connection
15. NC: No connection
16. NC: No connection

Functional Features

• Real-time clock with calendar functionality
• Battery backup for timekeeping during power loss
• Alarm and interrupt capabilities
• Programmable square wave output
• Non-volatile memory for data storage
• I2C interface for easy integration with microcontrollers

Advantages and Disadvantages

Advantages: - Accurate timekeeping - Low power consumption - Small form factor - Easy integration with microcontrollers - Battery backup for uninterrupted operation

Disadvantages: - Limited memory size (114 bytes) - Relatively higher cost compared to basic RTC modules

Working Principles

The DS12885S+T&R utilizes a crystal oscillator to generate accurate clock signals. It uses an internal counter to keep track of time, which is updated by the crystal oscillator pulses. The module also includes non-volatile memory to store important data, such as time, date, and alarm settings. During power loss, a battery backup ensures that the clock continues to run and the data remains intact.

Detailed Application Field Plans

The DS12885S+T&R is widely used in various electronic devices that require accurate timekeeping and data storage capabilities. Some common application fields include:

1. Consumer Electronics: Used in digital cameras, portable media players, and smartwatches to provide accurate time and date information.
2. Industrial Automation: Integrated into industrial control systems and programmable logic controllers (PLCs) for precise timing and scheduling operations.
3. Automotive: Incorporated into automotive dashboard displays and infotainment systems to display accurate time and date information.
4. Medical Devices: Utilized in medical equipment, such as patient monitors and infusion pumps, to record timestamps and ensure accurate synchronization.
5. Security Systems: Integrated into access control systems and surveillance devices to maintain accurate event logs and timestamps.

Detailed and Complete Alternative Models

1. DS3231: A highly accurate RTC module with an integrated temperature-compensated crystal oscillator (TCXO) for improved timekeeping.
2. PCF8563: A low-power RTC module with a built-in timer, alarm, and battery backup capabilities.
3. MCP7940N: An I2C-based RTC module with additional features like tamper detection and timestamping.

These alternative models offer similar functionality to the DS12885S+T&R and can be considered as alternatives based on specific requirements and preferences.

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