Overview
The 74HCT139DB,118, produced by Nexperia USA Inc., is a dual 2-to-4 line decoder/demultiplexer integrated circuit. This component is part of the 74HCT series, which is known for its compatibility with TTL (Transistor-Transistor Logic) input levels. The device decodes two binary weighted address inputs (nA0, nA1) to four mutually exclusive outputs (nY0 to nY3), making it suitable for various digital logic applications such as memory decoding, data routing, and code conversion.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Type Number | 74HCT139DB,118 | Orderable part number |
| Package | SSOP (Shrink Small Outline Package) | 16 leads, 1.27 mm pitch, 9.9 mm x 3.9 mm x 1.75 mm body |
| Voltage Supply | 4.5 V ~ 5.5 V | Single supply voltage range |
| Operating Temperature | -40°C ~ 125°C | Temperature range for operation |
| Input Levels | TTL level | Compatible with TTL input levels |
| ESD Protection | HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V | Electrostatic discharge protection levels |
| Independent Circuits | 2 | Two independent 2-to-4 decoders |
| Output Current | 4mA (high), 4mA (low) | Output current capabilities |
Key Features
- Dual 2-to-4 Line Decoder/Demultiplexer: Decodes two binary weighted address inputs to four mutually exclusive outputs.
- Enable Input: Each decoder features an enable input (nE) that forces all outputs HIGH when nE is HIGH, allowing for demultiplexer applications.
- Input Clamp Diodes: Includes clamp diodes to interface inputs to voltages in excess of VCC using current limiting resistors.
- Multi-Function Capability: Suitable for memory decoding, data routing, or code conversion.
- Compliance with Standards: Complies with JEDEC standard no. 7A.
- Active LOW Outputs: Mutually exclusive outputs are active LOW.
Applications
- Memory Decoding: Used in memory address decoding to select specific memory locations.
- Data Routing: Employed in data routing applications to direct data to different paths based on input conditions.
- Code Conversion: Utilized in code conversion applications to translate binary codes into other forms.
- Automotive and Industrial Systems: Finds use in various automotive and industrial systems due to its robustness and reliability.
- Consumer Electronics: Used in consumer electronics for logic and control functions.
Q & A
- What is the primary function of the 74HCT139DB,118?
The primary function is to decode two binary weighted address inputs to four mutually exclusive outputs, and it can also be used as a 1-to-4 demultiplexer.
- What are the input levels compatible with the 74HCT139DB,118?
The input levels are compatible with TTL (Transistor-Transistor Logic) levels.
- What is the operating temperature range for the 74HCT139DB,118?
The operating temperature range is from -40°C to 125°C.
- Does the 74HCT139DB,118 have ESD protection?
- What package type is the 74HCT139DB,118 available in?
- Can the 74HCT139DB,118 be used for memory decoding?
- How many independent decoders does the 74HCT139DB,118 contain?
- What is the output current capability of the 74HCT139DB,118?
- Is the 74HCT139DB,118 compliant with any industry standards?
- Can the enable input be used as a data input for demultiplexer applications?
