CD74HCT393M

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The CD74HCT393M is an 8-bit synchronous binary up/down counter which is designed for high performance memory address decoding and data demultiplexing applications. This chip has the added capability of being able to prescalar the clock rapidly with zero time-delay. It is capable of operating over a broad voltage range from 2 V to 6 V and is ideal for low voltage and low power applications.

The CD74HCT393M is designed to operate from a single supply, including the VDD, VCC, and VEE switches. It is based on a number of logic gates- NAND, NOR, Inverter, OR, and XOR. The counter can count up to 16 or up to 8 or down to 0 or up to 8 or down to 4 or up to 0 or down to 4 in synchronous mode.

The working principle of the CD74HCT393M is relatively simple. The chip contains two sub-circuits, one is a 4-bit counter and the other is a 4-bit decoder. The counter starts counting at 6 and 5 when the clock signal is low and the counter starts counting down at 4 and 3 when the clock signal is high. The output of the counter is then fed into the 4-bit decoder, which uses the counter’s bits as the input for selecting one of 16 possible outputs.

The CD74HCT393M can be used in a wide range of applications, from address decoding to data demultiplexing to frequency division. It can also be used to form an 8-bit shift register, an 8-bit multiplexer and a 4-bit encoder. The chip is particularly useful for applications needing low power, low cost and high performance memory address decoding and data demultiplexing.

The CD74HCT393M is available in standard packages such as the Plastic Dual Inline Package (PDIP) or the Small Outline Package (SOP). It features maximum operating frequencies up to 10 MHz, low power consumption, low noise and high speed.

In conclusion, the CD74HCT393M logic counter and divider is a versatile and powerful tool for low power and low cost nature of memory address decoding and data demultiplexing applications. This chip offers high performance and reliability with an economical cost structure making it an attractive choice for modern digital systems.

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