74HC390PW,118

Product Overview

Category

The 74HC390PW,118 belongs to the category of integrated circuits (ICs). Specifically, it is a high-speed CMOS logic dual decade ripple counter.

Use

This IC is commonly used in digital electronics for counting and dividing signals. It can be employed in various applications such as frequency division, time measurement, and event sequencing.

Characteristics

• High-speed operation: The 74HC390PW,118 operates at a high clock frequency, making it suitable for time-critical applications.
• Low power consumption: This IC is designed to consume minimal power, ensuring energy efficiency.
• Wide supply voltage range: It can operate within a wide range of supply voltages, providing flexibility in different electronic systems.
• Schmitt-trigger action on clock inputs: The Schmitt-trigger feature ensures reliable and noise-immune operation.

Package and Quantity

The 74HC390PW,118 is available in a small-sized TSSOP (Thin Shrink Small Outline Package) package. It is supplied in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Supply voltage range: 2V to 6V
• Operating temperature range: -40°C to +125°C
• Maximum clock frequency: 50 MHz
• Number of flip-flops: 2
• Number of outputs: 10
• Logic family: HC (High-Speed CMOS)

Pin Configuration

The pin configuration of the 74HC390PW,118 is as follows:

+-----+ Q1 |1 16| VCC Q0 |2 15| Q3 CP |3 14| Q4 MR |4 13| Q5 QD |5 12| Q6 Q2 |6 11| Q7 GND |7 10| Q8 CLK |8 9| Q9 +-----+

Functional Features

• Dual decade ripple counter: The IC can count up to 99 in decimal, making it suitable for various counting applications.
• Asynchronous reset (MR): The asynchronous reset input allows the counter to be reset to zero at any time, independently of the clock signal.
• Cascadable: Multiple 74HC390PW,118 ICs can be cascaded together to achieve higher counting ranges.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient counting in time-critical applications.
• Low power consumption ensures energy efficiency.
• Wide supply voltage range provides flexibility in different electronic systems.
• Schmitt-trigger action on clock inputs ensures reliable and noise-immune operation.

Disadvantages

• Limited counting range: The IC can only count up to 99, which may not be sufficient for certain applications requiring larger counting ranges.
• Lack of built-in carry output: The IC does not have a built-in carry output, limiting its direct use in applications requiring carry signals.

Working Principles

The 74HC390PW,118 operates based on the principle of ripple counting. It utilizes flip-flops to store and propagate the count value. The clock input triggers the flip-flops, causing them to change their states and increment the count. The asynchronous reset input allows the counter to be reset to zero at any time, independent of the clock signal.

Application Field Plans

The 74HC390PW,118 finds applications in various fields, including: 1. Frequency division circuits: It can be used to divide high-frequency signals into lower frequencies for further processing or control. 2. Time measurement systems: The IC enables accurate time measurement by counting clock cycles. 3. Event sequencing: It can be employed to sequence events in digital systems, such as controlling the order of operations.

Alternative Models

There are several alternative models available that offer similar functionality to the 74HC390PW,118. Some notable alternatives include: - CD4017: A decade counter with 10 outputs and a built-in carry output. - 74LS90: A TTL (Transistor-Transistor Logic) version of the dual decade counter. - CD4026: A CMOS counter with a built-in 7-segment display driver.

These alternative models can be considered based on specific requirements and compatibility with existing systems.

In conclusion, the 74HC390PW,118 is a high-speed CMOS logic dual decade ripple counter used for counting and dividing signals in digital electronics. Its characteristics include high-speed operation, low power consumption, and wide supply voltage range. The IC comes in a TSSOP package and has various functional features, advantages, and disadvantages. It operates based on ripple counting principles and finds applications in frequency division, time measurement, and event sequencing. Alternative models such as CD4017