PCA85262ATT/AJ

Product Overview

• Category: Integrated Circuit
• Use: Real-Time Clock (RTC) and Calendar
• Characteristics: Low power consumption, high accuracy, small package size
• Package: TSSOP-20
• Essence: The PCA85262ATT/AJ is a real-time clock and calendar integrated circuit designed for low power applications. It provides accurate timekeeping and calendar functions with minimal power consumption.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Supply Voltage: 1.8V to 5.5V
• Timekeeping Accuracy: ±3 minutes per year at 25°C
• Operating Temperature Range: -40°C to +85°C
• I2C Bus Interface: Supports standard and fast mode (up to 400 kHz)
• Alarm Function: Programmable alarm with interrupt capability
• Power Management: Ultra-low power consumption in standby mode

Pin Configuration

The PCA85262ATT/AJ features a TSSOP-20 package with the following pin configuration:

1. VDD - Supply voltage
2. GND - Ground
3. SDA - I2C data line
4. SCL - I2C clock line
5. INT - Interrupt output
6. SQW - Square wave output
7. X1 - Crystal oscillator input
8. X2 - Crystal oscillator output
9. NC - No connection
10. A2 - Address bit 2
11. A1 - Address bit 1
12. A0 - Address bit 0
13. VBAT - Backup battery input
14. VBATGND - Backup battery ground
15. RESET - Reset input
16. AGND - Analog ground
17. XTALCAP - Crystal oscillator load capacitor
18. NC - No connection
19. VDDIO - I/O supply voltage
20. IO1 - General-purpose I/O pin

Functional Features

• Real-time clock and calendar functions
• Alarm with interrupt capability
• Square wave output for timing applications
• Ultra-low power consumption in standby mode
• Backup battery support for timekeeping during power loss
• I2C bus interface for easy integration with microcontrollers

Advantages and Disadvantages

Advantages: - High accuracy timekeeping - Low power consumption - Small package size - Easy integration with microcontrollers

Disadvantages: - Limited number of general-purpose I/O pins - Requires an external crystal oscillator for accurate timekeeping

Working Principles

The PCA85262ATT/AJ utilizes an internal oscillator and an external crystal to provide accurate timekeeping and calendar functions. It communicates with a microcontroller through the I2C bus interface, allowing for easy integration into various applications. The device operates in low power modes when not actively used, minimizing power consumption.

Application Field Plans

The PCA85262ATT/AJ is suitable for a wide range of applications, including:

1. Wearable devices
2. Internet of Things (IoT) devices
3. Home automation systems
4. Industrial control systems
5. Automotive electronics
6. Medical equipment

Alternative Models

• DS3231 - Real-Time Clock Module
• PCF8563 - Real-Time Clock and Calendar IC
• MCP7940N - I2C Real-Time Clock/Calendar with SRAM

These alternative models offer similar functionality and can be considered as alternatives to the PCA85262ATT/AJ.

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