X1228S14

Product Overview

• Category: Integrated Circuit (IC)
• Use: Non-volatile Static RAM with Real Time Clock (RTC)
• Characteristics: Low power consumption, high reliability, small form factor
• Package: SOP-8 (Small Outline Package)
• Essence: Combines non-volatile static RAM and real-time clock functionality in a single chip
• Packaging/Quantity: Available in tape and reel packaging, 2500 units per reel

Specifications

• Memory Size: 2Kb (256 x 8 bits)
• Supply Voltage: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Clock Accuracy: ±2 minutes per month at 25°C
• Data Retention: Over 10 years
• Write Cycles: Up to 1 million cycles

Detailed Pin Configuration

The X1228S14 IC has the following pin configuration:

1. VCC: Power supply voltage
2. GND: Ground reference
3. SDA: Serial Data Input/Output
4. SCL: Serial Clock Input
5. WP: Write Protect
6. VBAT: Battery input for RTC backup
7. NC: No Connection
8. NC: No Connection

Functional Features

• Non-volatile storage of data during power loss or system shutdown
• Real-time clock with calendar and alarm functions
• Automatic switchover between battery and main power supply
• I2C interface for easy integration with microcontrollers
• Low power consumption in both active and standby modes

Advantages and Disadvantages

Advantages: - Eliminates the need for external components for non-volatile memory and real-time clock functions - Small form factor saves board space - High reliability and long data retention period - Low power consumption extends battery life

Disadvantages: - Limited memory size (2Kb) - Clock accuracy may vary with temperature and supply voltage fluctuations

Working Principles

The X1228S14 combines non-volatile static RAM and real-time clock functionality by utilizing a small amount of non-volatile memory to store critical data, such as system configuration settings or user preferences. The real-time clock keeps track of time and date, providing accurate timing information even during power loss.

During normal operation, the IC is powered by the main power supply (VCC) and the non-volatile memory is accessible for read and write operations. In case of power loss, the IC automatically switches to the backup battery (VBAT) and continues to provide real-time clock functionality while preserving the stored data.

The I2C interface allows easy communication with microcontrollers, enabling seamless integration into various electronic systems.

Detailed Application Field Plans

The X1228S14 is suitable for a wide range of applications, including:

1. Embedded systems requiring non-volatile memory storage and real-time clock functionality, such as industrial control systems, medical devices, and automotive electronics.
2. Battery-powered devices that need to retain critical data during power loss, such as portable data loggers, handheld instruments, and IoT devices.
3. Consumer electronics, including digital cameras, set-top boxes, and home automation systems, where reliable timekeeping and data storage are essential.

Detailed and Complete Alternative Models

1. X1226S14: Similar to X1228S14 but with 1Kb memory size instead of 2Kb.
2. X1229S14: Enhanced version with additional features like tamper detection and extended memory capacity (4Kb).

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