MAX690AESA+TG002

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: Provides real-time clock functionality with battery backup for various applications.
• Packaging/Quantity: Available in tape and reel packaging, with a quantity of 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: 1.3V to 5.5V
• Battery Backup Current: 500nA (typical)

Detailed Pin Configuration

1. VCC: Power supply input
2. GND: Ground reference
3. X1: Crystal oscillator input
4. X2: Crystal oscillator output
5. RST: Reset input
6. VBAT: Battery backup input
7. SQW/OUT: Square wave output or interrupt output
8. NC: No connection

Functional Features

• Real-time clock with calendar functionality
• Automatic leap year compensation
• Alarm function with programmable time
• Battery backup ensures timekeeping during power loss
• Programmable square wave output frequency
• Power-on reset and watchdog timer

Advantages

• Low power consumption extends battery life
• Small form factor allows for space-constrained designs
• High accuracy timekeeping ensures precise timing requirements
• Battery backup provides uninterrupted operation during power outages
• Versatile square wave output can be used for various purposes

Disadvantages

• Limited number of pins may restrict additional functionalities
• Requires an external crystal oscillator for timekeeping accuracy

Working Principles

The MAX690AESA+TG002 is a real-time clock IC that utilizes an external crystal oscillator to maintain accurate timekeeping. It operates on a supply voltage range of 2.7V to 5.5V and features a battery backup input (VBAT) to ensure uninterrupted operation during power loss. The IC incorporates a calendar function with automatic leap year compensation and an alarm function that can be programmed for specific time intervals. Additionally, it offers a programmable square wave output frequency and includes power-on reset and watchdog timer features.

Detailed Application Field Plans

The MAX690AESA+TG002 is widely used in various applications that require precise timekeeping and battery backup functionality. Some potential application fields include: 1. Embedded systems 2. Industrial automation 3. Medical devices 4. Security systems 5. Data loggers 6. Automotive electronics 7. Consumer electronics

Detailed and Complete Alternative Models

1. DS1307 - Real-Time Clock IC by Maxim Integrated
2. PCF8563 - Real-Time Clock and Calendar IC by NXP Semiconductors
3. MCP7940N - I2C Real-Time Clock/Calendar IC by Microchip Technology
4. DS3231 - Extremely Accurate I2C RTC IC by Maxim Integrated
5. RV-8803-C7 - Ultra-Low Power Real-Time Clock Module by Micro Crystal AG

(Note: This list is not exhaustive and there are several other alternative models available in the market.)

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