X1226V8I

Real Time Clocks and The X1226V8I

Real time clocks are an essential part of many electronic applications, providing them with an accurate measure of time during operation. In general, real time clocks are used to measure the passage of time, typically specified in seconds, minutes, hours, and days. One such real time clock is the X1226V8I, produced by Exar Corporation, which is a monolithic CMOS device used to provide timekeeping and calendar functions.

The X1226V8I - Overview

The X1226V8I is a highly integrated, low-power CMOS chip that is essentially a complete timekeeping and calendar circuit. It comes in an 18-pin package, and features an integrated oscillator for keeping accurate time, as well as an array of registers for storing data related to time, such as the day and month. The real time clock has been designed to have a minimum power consumption thanks to its low power CMOS technology, and it also supports a battery backup feature. This allows the device to maintain its accuracy even in instances when its main power supply is cut off.

X1226V8I- Features

The X1226V8I uses a 32.768kHz crystal to provide accuracy, which ensures its data remains reliable. It also has power-on reset and bat-low detectors that provide indication when the battery power is low. The device is capable of automatically detecting daylight savings time/standard time changes, and its built-in voltage regulator allows it to operate from 2.0V to 5.5V. Moreover, the X1226V8I also has an onboard backup battery option that can be used when the main power interruption occurs. This enables the device to retain its data, such as the time and date.

X1226V8I - Applications

Due to its design, the X1226V8I is ideal for a variety of applications, including but not limited to:

• Mobile Phones
• Digital Cameras
• Networking Equipment
• Test and Measurement Equipment
• PDAs and Handhelds
• Smartcards and Memory Cards
• Personal Computers

X1226V8I - Working Principle

The working principle of the X1226V8I is relatively straightforward. The device contains an oscillator and registers, which are used to keep track of the elapsed time. The oscillator produces a square wave at a fixed frequency and the register is used to store the time information. The specific frequency that the oscillator produces is determined by the attached crystal, typically 32.768kHz. Every second or minute, the oscillator toggles its output and increments the register, thus keeping track of the time that has passed.

Conclusion

As evidenced, the X1226V8I is a highly integrated, low-power CMOS chip designed to provide timekeeping and calendar functions. It makes use of an oscillator and register system to measure the passage of time and can be used in a wide range of applications due to its power efficiency and low power CMOS design.