CD4521BE

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The CD4521BE is a CMOS counter and divider manufactured by Texas Instruments. This divider is the most commonly used device in the CD4521BE family and is characterised by its quasi-static structure which allows for the quiet operation of the device.

The CD4521BE features a digital divider which divides an input frequency by 2 N, where N is an integer less or equal than 8. This divide-by-2 function is useful for optical digital isolators, ADC and DAC chips and systems working with multiple clock signals. Additionally, the input frequency is divided by 2 N and the output is routed through two outputs, allowing the counter to create two independent clock signals that can be used in different parts of the system.

The device also features two types of counter: ripple and synchronous counters. The ripple counter provides smooth transitions from one count to the next, counting each frequency from one clock period to the next. The synchronous counter is similar in operation to the ripple counter but is designed as a synchronous circuit, due to which the output of the counter is synchronised with the input frequency. This feature makes this device suitable for applications that require multiple clock outputs which must operate in perfect synchrony.

The CD4521BE is a versatile and highly reliable device, which is suitable for a wide range of applications especially when employed in a variety of designs. Its maximum frequency of operation is 10 MHz, making it suitable for high speed systems. Furthermore, it operates at a wide temperature range of −55°C to +125°C making it suitable for extreme temperature environments.

In terms of power consumption, the CD4521BE is a very low power device, drawing only 6.5 mWatts of power in active mode. This power consumption makes the CD4521BE suitable for battery powered applications, such as remote control equipment and automotive electronics, which would otherwise require the use of larger, more power demanding components.

The CD4521BE features a wide operating voltage range of 4.5 V to 16 V, making it suitable for both 3.3V and 5V systems. The device also features an input glitch protection and schmitt trigger, ensuring glitch-free operation. This is beneficial for systems operating in noisy environments, where glitches in the input signal could cause the system to fail.

The CD4521BE is a CMOS counter and divider suitable for a wide range of applications and system designs. Its wide frequency range, high temperature capability, low power consumption, and high reliability make it the ideal device for many applications. Its ability to provide two independent clock outputs, as well as its protection against input glitches, make it an extremely versatile component.

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