PCF85263ATT1/AJ

Product Overview

• Category: Integrated Circuit
• Use: Real-Time Clock (RTC)
• Characteristics: Low power consumption, high accuracy, small package size
• Package: TSSOP-20
• Essence: The PCF85263ATT1/AJ is a real-time clock integrated circuit designed for various applications that require accurate timekeeping.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Supply Voltage: 1.8V to 5.5V
• Timekeeping Accuracy: ±3 ppm at 25°C
• Operating Temperature Range: -40°C to +85°C
• I2C-bus Interface: Supports standard mode (100 kHz) and fast mode (400 kHz)
• Alarm Function: Programmable alarm with interrupt capability
• Battery Backup: Integrated battery switchover circuitry for backup power supply

Detailed Pin Configuration

The PCF85263ATT1/AJ has a total of 20 pins arranged as follows:

1. VDD - Power supply voltage input
2. GND - Ground
3. SDA - I2C-bus data line
4. SCL - I2C-bus clock line
5. INT - Interrupt output
6. SQW - Square wave output
7. BAT - Battery input for backup power supply
8. X1 - Crystal oscillator input
9. X2 - Crystal oscillator output
10. NC - No connection
11. NC - No connection
12. NC - No connection
13. NC - No connection
14. NC - No connection
15. NC - No connection
16. NC - No connection
17. NC - No connection
18. NC - No connection
19. NC - No connection
20. NC - No connection

Functional Features

• Accurate Timekeeping: The PCF85263ATT1/AJ provides high accuracy timekeeping with a low ppm deviation.
• Battery Backup: Integrated battery switchover circuitry ensures uninterrupted operation during power outages.
• Alarm Function: Programmable alarm with interrupt capability allows for timely notifications.
• I2C-bus Interface: Supports standard and fast modes for easy integration with other devices.

Advantages and Disadvantages

Advantages

• Low power consumption, making it suitable for battery-powered applications.
• High accuracy ensures precise timekeeping.
• Small package size enables space-saving designs.
• Flexible I2C-bus interface simplifies integration.

Disadvantages

• Limited quantity of pins may restrict the number of external components that can be connected directly.

Working Principles

The PCF85263ATT1/AJ utilizes an internal oscillator and a crystal to generate accurate timekeeping signals. It communicates with the host microcontroller through the I2C-bus interface, allowing for easy configuration and data exchange. The integrated battery switchover circuitry ensures continuous operation even during power interruptions.

Detailed Application Field Plans

The PCF85263ATT1/AJ is widely used in various applications that require precise timekeeping, such as:

1. Wearable Devices: Smartwatches, fitness trackers, and other wearable gadgets benefit from accurate timekeeping for tracking activities and providing timely notifications.
2. Industrial Automation: Real-time clocks are essential in industrial automation systems for synchronizing processes and scheduling tasks.
3. Automotive Electronics: The PCF85263ATT1/AJ finds application in automotive electronics for time-sensitive functions like event logging and data synchronization.
4. Home Automation: Clocks integrated into home automation systems ensure accurate timing for scheduled events and energy management.

Detailed and Complete Alternative Models

1. PCF8563TS/1, PCF8563TS/2, PCF8563TS/3
2. DS3231SN+, DS3231M+, DS3231S+
3. MCP7940N-I/SN, MCP7940N-I/ST, MCP7940N-I/SL

These alternative models offer similar functionality and can be considered as alternatives to the PCF85263ATT1/AJ.

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