CD74HCT688E 8‑Bit Comparator by CHUANGYEIC 20‑Pin DIP Package

Description

Product Overview

The CD74HCT688E is an 8‑bit voltage comparator designed for high‑speed, high‑precision applications in industrial and scientific environments. Manufactured by CHUANGYEIC, this component operates from a 4.5 V to 5.5 V supply, delivering a low quiescent current of just 8 µA, which helps to keep overall system power consumption to a minimum. Its output stage can source and sink up to 4 mA, providing sufficient drive capability for a variety of downstream logic families. Packaged in a rugged 20‑pin DIP (5.63 × 3.9 × 0.75 in, 1.23 oz), the part is easy to handle, solder, and replace, making it a practical choice for both prototype development and high‑volume production.

Usage

This comparator excels in applications that require fast edge detection, such as motor control feedback loops, sensor signal conditioning, and digital communication interfaces. Its wide operating voltage range and low power draw make it ideal for battery‑powered devices, while the robust DIP footprint ensures reliable mounting in harsh industrial enclosures. Engineers often integrate the CD74HCT688E into programmable logic controllers, data acquisition systems, and safety‑critical monitoring circuits where deterministic response times are essential. The device’s 8‑bit architecture allows for multiple independent comparison channels, enabling complex decision‑making logic without the need for additional external components.

Why Choose Us

Choosing the CD74HCT688E from CHUANGYEIC means selecting a part that combines proven semiconductor reliability with competitive pricing. Each unit undergoes rigorous testing for temperature stability, voltage tolerance, and output consistency, ensuring that it meets or exceeds industry standards for signal comparators. CHUANGYEIC provides comprehensive technical support, including detailed datasheets, application notes, and design‑in assistance, helping customers accelerate time‑to‑market. In addition, the company offers a responsive after‑sales service program that includes warranty coverage, rapid replacement options, and access to a global network of authorized distributors.

Key Features

• Low quiescent current (8 µA) reduces overall system power consumption.
• Wide supply voltage range (4.5 V‑5.5 V) ensures flexibility across many designs.
• 4 mA high and low output drive supports a variety of logic families.
• Compact 20‑pin DIP package simplifies PCB layout and assembly.
• Dedicated technical support and warranty service for peace of mind.

FAQ

What is the maximum input voltage range for the CD74HCT688E?

The comparator can handle input voltages up to the supply voltage (5.5 V) and down to ground, making it suitable for standard 5 V logic levels.

Can the device operate in a temperature‑controlled environment?

Yes, the CD74HCT688E is rated for operation from –40 °C to +85 °C, which covers most industrial and scientific temperature ranges.

Is the 20‑pin DIP package compatible with surface‑mount technology?

While the DIP package is primarily designed for through‑hole mounting, it can be used with hybrid assembly processes that combine through‑hole and surface‑mount techniques.

How does the comparator handle noise on the input signal?

The internal design includes hysteresis control options that can be configured externally to improve noise immunity and provide clean switching behavior.

What support resources are available for designers?

CHUANGYEIC offers full datasheets, reference schematics, application notes, and a dedicated engineering support line to assist with design integration and troubleshooting.