Overview
The CD74HCT688EG4 is an 8-bit magnitude comparator manufactured by Texas Instruments. This high-speed CMOS logic device is designed for applications requiring the comparison of two 8-bit binary words. It is particularly useful in computer and logic systems where equality checks are essential. The device features a low output when the compared words are equal, making it suitable for cascading in complex logic circuits. Its market positioning targets engineers and designers working on digital systems, offering a reliable and efficient solution for binary word comparison tasks.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Technology Family | HCT | - | High-speed CMOS logic |
| Number of Channels | 8 | - | 8-bit magnitude comparator |
| Input Type | TTL-Compatible CMOS | - | Compatible with TTL logic levels |
| Output Type | Push-Pull | - | Balanced outputs |
| Operating Voltage | 4.5 to 5.5 | V | Wide voltage range |
| Propagation Delay | 34 | ns | At 4.5V, 50pF |
| Static Current | 8 | µA | Low power consumption |
| Operating Temperature | -55 to 125 | °C | Wide temperature range |
| Package | SOIC-20 | - | Surface mount |
Key Features
- High-speed operation with balanced propagation delays and transition times.
- Low power consumption compared to LSTTL logic ICs.
- Direct LSTTL input logic compatibility with CMOS input compatibility.
- Wide operating temperature range from -55°C to 125°C.
- Push-pull outputs for balanced performance.
Applications
The CD74HCT688EG4 is widely used in digital systems for binary word comparison tasks. Typical applications include computer systems, logic circuits, and industrial automation. Its ability to cascade makes it ideal for complex logic designs where multiple comparisons are required. Additionally, its high-speed and low-power characteristics make it suitable for portable and battery-operated devices.
Q & A
What is the operating voltage range of the CD74HCT688EG4?
The operating voltage range is 4.5V to 5.5V.
What is the propagation delay of the CD74HCT688EG4?
The propagation delay is 34ns at 4.5V with a 50pF load.
Is the CD74HCT688EG4 compatible with TTL logic levels?
Yes, it is TTL-compatible.
What is the static current consumption of the CD74HCT688EG4?
The static current is 8µA.
What is the operating temperature range of the CD74HCT688EG4?
The operating temperature range is -55°C to 125°C.
Can the CD74HCT688EG4 be used in cascading applications?
Yes, it is designed for cascading in complex logic circuits.
What is the package type of the CD74HCT688EG4?
It comes in an SOIC-20 package.
What is the output type of the CD74HCT688EG4?
It has push-pull outputs.
What is the primary function of the CD74HCT688EG4?
It is an 8-bit magnitude comparator for comparing two 8-bit binary words.
Is the CD74HCT688EG4 suitable for high-speed applications?
Yes, it is designed for high-speed operation with balanced propagation delays.
