MAX690ACSA+T

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Real-Time Clock (RTC) with Battery Backup
• Characteristics:
  • Low-power consumption
  • Small form factor
  • High accuracy timekeeping
  • Battery backup for uninterrupted operation
• Package: 8-pin Small Outline Integrated Circuit (SOIC)
• Essence: Real-time clock and calendar function with battery backup
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Timekeeping Accuracy: ±2 minutes per month at 25°C
• Battery Backup Voltage Range: 2.0V to 5.5V
• Battery Backup Current: 1µA (typical)

Detailed Pin Configuration

1. VCC: Power supply input
2. GND: Ground reference
3. X1: Crystal oscillator input
4. X2: Crystal oscillator output
5. VBAT: Battery backup input
6. RST: Reset output
7. SDA: Serial Data I/O
8. SCL: Serial Clock Input

Functional Features

• Real-time clock with calendar function
• Battery backup ensures uninterrupted operation during power loss
• Automatic leap year compensation
• Alarm and timer functions
• Programmable square wave output
• I2C interface for easy integration with microcontrollers

Advantages

• Low power consumption extends battery life
• Compact package allows for space-saving designs
• High accuracy timekeeping ensures precise timing applications
• Wide supply voltage range enables flexibility in power source selection

Disadvantages

• Limited memory capacity for storing additional data
• Lack of built-in temperature compensation for improved accuracy

Working Principles

The MAX690ACSA+T is a real-time clock IC that utilizes an external crystal oscillator to maintain accurate timekeeping. It operates on a low power supply voltage and incorporates a battery backup feature, allowing it to continue functioning even during power interruptions. The IC communicates with external devices through the I2C interface, enabling easy integration into various applications.

Detailed Application Field Plans

• Embedded systems requiring precise timekeeping, such as industrial automation and control systems
• Battery-powered devices that need to maintain accurate time during power loss, such as portable medical equipment
• Consumer electronics, including digital cameras, audio/video recorders, and home appliances

Detailed and Complete Alternative Models

1. DS1307: Real-Time Clock IC with 56 bytes of non-volatile RAM
2. PCF8563: Low-power Real-Time Clock IC with alarm and timer functions
3. MCP7940N: I2C Real-Time Clock Calendar with SRAM and EEPROM

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