Overview
The CD74HCT238M is a high-speed CMOS logic 3-to-8 line decoder/demultiplexer manufactured by Texas Instruments. This component is designed to decode three binary weighted address inputs into eight mutually exclusive outputs. It is part of the HCT series, which combines the low power consumption of CMOS technology with the high noise immunity and drive capability of TTL logic. The CD74HCT238M is widely used in applications requiring address decoding, data routing, and signal demultiplexing, making it a versatile choice for industrial, automotive, and consumer electronics.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 4.5 - 5.5 | V | |
| Operating Temperature | -55 to 125 | °C | |
| Propagation Delay | 13 | ns | Typical at VCC = 5V, CL = 15pF, TA = 25°C |
| Input Current | ≤1 | µA | CMOS input compatibility |
| Output Drive | 15 LSTTL loads | Bus driver output | |
| Package | SOIC-16 |
Key Features
- High-speed CMOS logic for efficient performance.
- 3-to-8 line decoding with high and low active outputs.
- Three enable inputs for easy cascading.
- Balanced propagation delays and transition times.
- Low power consumption compared to LSTTL logic.
Applications
The CD74HCT238M is ideal for use in address decoding in memory systems, data routing in communication systems, and signal demultiplexing in various electronic circuits. Its robust design and high noise immunity make it suitable for industrial automation, automotive electronics, and consumer electronics applications where reliable signal processing is critical.
Q & A
What is the operating voltage range of the CD74HCT238M?
The operating voltage range is 4.5V to 5.5V.
What is the typical propagation delay of the CD74HCT238M?
The typical propagation delay is 13ns at VCC = 5V, CL = 15pF, and TA = 25°C.
Can the CD74HCT238M be used in automotive applications?
Yes, its high noise immunity and robust design make it suitable for automotive electronics.
What is the package type of the CD74HCT238M?
It comes in an SOIC-16 package.
How many LSTTL loads can the CD74HCT238M drive?
It can drive up to 15 LSTTL loads.
What is the input current of the CD74HCT238M?
The input current is ≤1µA for CMOS input compatibility.
What is the temperature range for operation?
The operating temperature range is -55°C to 125°C.
Does the CD74HCT238M support cascading?
Yes, it has three enable inputs that facilitate easy cascading.
What are the key features of the CD74HCT238M?
Key features include high-speed CMOS logic, 3-to-8 line decoding, and low power consumption.
Is the CD74HCT238M suitable for industrial applications?
Yes, its reliability and performance make it ideal for industrial automation and control systems.
