Overview
The 74HCT138D,652 is a 3-to-8 line decoder/demultiplexer integrated circuit produced by Nexperia USA Inc. This component is part of the 74HCT series, which operates at TTL (Transistor-Transistor Logic) levels. It is widely used in digital circuits for decoding and demultiplexing applications. The 74HCT138D is available in a SO16 (SOT109-1) package and is known for its low power consumption and high reliability.
Key Specifications
| Type number | VCC (V) | Logic switching levels | Output drive capability (mA) | tpd (ns) | Power dissipation considerations | Tamb (°C) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name |
|---|---|---|---|---|---|---|---|---|---|---|
| 74HCT138D | 4.5 - 5.5 | TTL | ± 4 | 19 | low | -40 to 125 | 93 | 10 | 53 | SO16 |
Key Features
- Logic Switching Levels: Operates at TTL levels, making it compatible with a wide range of digital circuits.
- Output Drive Capability: Capable of driving outputs up to ±4 mA.
- Propagation Delay: A propagation delay of 19 ns, ensuring fast switching times.
- Power Dissipation: Low power consumption, suitable for energy-efficient designs.
- Temperature Range: Specified to operate from -40°C to 125°C, making it suitable for various environmental conditions.
- ESD Protection: Complies with JEDEC standards for HBM (Human Body Model) and CDM (Charged Device Model) ESD protection, exceeding 2000 V and 1000 V respectively.
- Package Options: Available in SO16 (SOT109-1) package, offering flexibility in design and layout.
Applications
The 74HCT138D is versatile and can be used in a variety of applications, including:
- Digital Decoding and Demultiplexing: Can be used as an eight-output demultiplexer by utilizing one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes.
- Automotive Systems: Suitable for use in automotive electronics due to its wide operating temperature range and robust ESD protection.
- Industrial Control Systems: Used in industrial control systems where reliable and fast switching is required.
- Consumer Electronics: Found in various consumer electronic devices requiring digital signal processing and switching.
Q & A
- What is the primary function of the 74HCT138D?
The primary function of the 74HCT138D is to act as a 3-to-8 line decoder/demultiplexer, converting a 3-bit binary input into one of eight possible output lines.
- What logic levels does the 74HCT138D operate at?
The 74HCT138D operates at TTL (Transistor-Transistor Logic) levels.
- What is the output drive capability of the 74HCT138D?
The output drive capability of the 74HCT138D is ±4 mA.
- What is the propagation delay of the 74HCT138D?
The propagation delay of the 74HCT138D is 19 ns.
- What is the operating temperature range of the 74HCT138D?
The 74HCT138D operates from -40°C to 125°C.
- What type of ESD protection does the 74HCT138D have?
The 74HCT138D complies with JEDEC standards for HBM and CDM ESD protection, exceeding 2000 V and 1000 V respectively.
- In what package is the 74HCT138D available?
The 74HCT138D is available in a SO16 (SOT109-1) package.
- Can the 74HCT138D be used as a demultiplexer?
Yes, the 74HCT138D can be used as an eight-output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes.
- Is the 74HCT138D RoHS compliant?
Yes, the 74HCT138D is RoHS compliant.
- Where can I purchase the 74HCT138D?
The 74HCT138D can be purchased from various distributors, including those listed on the Nexperia website.
