CD74HCT163MT

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The CD74HCT163MT is a synchronous 4-bit, up/down-counting binary counter with an asynchronous reset, and are specifically designed to generate high-speed clocks or divide-by-N frequencies. The CD74HCT163MT is available in 16-pin TSSOP, SOIC and SOP packages, eliminating the need for external logic that is typical of asynchronous binary counters. The count output can be used for the most common clock pulse applications for the system.

The CD74HCT163MT is composed of four binary, synchronous, edge triggered, master-slave flip-flops with a reset. A clock enable (CE) input, common to all four flip-flops, controls, when a clock pulse is registered by the counter. The up/down input (UD) determines whether the counter counts up or down in response to each clock transition. The asynchronous reset (R) resets the counter independent from the clock.

The application field of the CD74HCT163MT is more comprehensive than other traditional up/down counters. It is suitable for application with I2C communication, processor/microcontroller-based designs, and applications with a high-speed clock. It can also be used with presettable counters where the 4-bit output provides a count overflow indication. Besides, the selectable asynchronous counter reset can easily reset the count value to the starting point. The CD74HCT163MT offers eye-catching performance benefits in applications like video games, toys, peripherals, automotive, and communication systems.

The working principle of the CD74HCT163MT is quite simple. The counter consists of four flip-flops connected in a Synchronous Count Chain and controlled by up/down inputs, clock enable and reset inputs. When the clock enable (CE) input is high, the clock signals will be passed to the flip-flops. When the up/down (UD) input is high, the clock pulse will force the input to transition from low to high, which will cause the flip-flops to count up. When the up/down input is low, the clock pulse will force the input to transition from high to low, causing the flip-flops to count down. The asynchronous reset (R) input will reset the flip-flops to their initial state disregarding the count state.

The key features of the CD74HCT163MT includes 8 to -40 Vdc input voltage range with TTL output voltage compatibility and fast propagation delay for increased design flexibility. This counter also has a guaranteed 4mA output drive and ESD immunity up to 8KV. Each flip-flop has an independent master/slave type architecture and there is no ripple in output due to the synchronous operation.

The CD74HCT163MT has been widely used in industrial and commercial applications. It is an ideal device for divide-by-N counting applications, especially in high frequency systems. It also excels in applications that require high speed, low power consumption, low cost, and ultra-reliable performance. The high speed and low power consumption makes the CD74HCT163MT an ideal counter for high frequency applications in which power consumption and reliability are essential.

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