DS1251YP-70IND+ Encyclopedia Entry

Product Overview

Category: Integrated Circuits (ICs)

Use: The DS1251YP-70IND+ is a high-performance integrated circuit primarily used for real-time clock (RTC) applications. It provides accurate timekeeping and calendar functions in various electronic devices.

Characteristics: - High precision timekeeping - Low power consumption - Wide operating temperature range - Small form factor - Easy integration into electronic systems

Package: The DS1251YP-70IND+ is available in a compact 8-pin DIP (Dual Inline Package) format, which ensures compatibility with standard IC sockets.

Essence: This integrated circuit serves as a reliable and efficient solution for maintaining accurate time and date information in electronic devices.

Packaging/Quantity: The DS1251YP-70IND+ is typically packaged in reels or tubes, containing a quantity of 1000 units per package.

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
• Clock Frequency: 32.768 kHz
• Battery Backup Voltage: 2.0V to 5.5V
• Standby Current: 600nA (typical)
• Data Retention: Over 10 years

Detailed Pin Configuration

The DS1251YP-70IND+ features the following pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | VCC | Power supply voltage input | | 2 | GND | Ground reference | | 3 | X1 | Crystal oscillator input | | 4 | X2 | Crystal oscillator output | | 5 | VBAT | Battery backup voltage input | | 6 | RST | Reset input | | 7 | SDA | Serial data input/output | | 8 | SCL | Serial clock input |

Functional Features

1. Real-Time Clock: The DS1251YP-70IND+ provides accurate timekeeping with a built-in oscillator and calendar functions.
2. Battery Backup: It includes a battery backup feature to ensure continuous operation during power outages.
3. Low Power Consumption: The integrated circuit operates with minimal power consumption, extending the battery life in portable devices.
4. I2C Interface: The DS1251YP-70IND+ utilizes the I2C (Inter-Integrated Circuit) protocol for easy communication with microcontrollers or other devices.
5. Alarm Function: It supports programmable alarms for triggering specific events at predefined times.

Advantages and Disadvantages

Advantages: - High precision timekeeping - Wide operating temperature range - Low power consumption - Compact form factor - Easy integration into electronic systems

Disadvantages: - Limited availability of alternative models - Relatively higher cost compared to some alternatives

Working Principles

The DS1251YP-70IND+ utilizes an internal oscillator to generate a precise clock signal. It maintains accurate timekeeping by counting the oscillations and updating the time registers accordingly. The integrated circuit also incorporates a calendar function that tracks the date and day of the week.

During normal operation, the DS1251YP-70IND+ is powered by the main supply voltage (VCC). In case of a power failure, it seamlessly switches to the backup battery (VBAT) to ensure uninterrupted timekeeping.

Detailed Application Field Plans

The DS1251YP-70IND+ finds applications in various electronic devices requiring real-time clock functionality, including:

1. Consumer Electronics: Used in digital cameras, portable media players, and gaming consoles to provide accurate time and date information.
2. Industrial Automation: Integrated into programmable logic controllers (PLCs) and industrial control systems for precise time synchronization and event scheduling.
3. Automotive Systems: Employed in car infotainment systems, dashboard displays, and navigation units to maintain accurate timekeeping and calendar functions.
4. Medical Devices: Utilized in medical equipment such as patient monitors and infusion pumps to ensure accurate time tracking for critical operations.

Detailed and Complete Alternative Models

While the DS1251YP-70IND+ is a reliable choice for real-time clock applications, alternative models with similar functionality include:

1. Maxim DS1307
2. Texas Instruments DS3231
3. NXP PCF8563
4. Microchip MCP7940N

These alternatives offer comparable features and can be considered based on specific requirements and availability.

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