Overview
The 74HCT139D,653 is a dual 2-to-4 line decoder/demultiplexer integrated circuit produced by Nexperia USA Inc. This component is part of the 74HC/74HCT family and is designed to decode two binary weighted address inputs (nA0, nA1) into four mutually exclusive outputs (nY0 to nY3). Each decoder features an enable input (nE) that, when set HIGH, forces all outputs to HIGH, allowing for 1-to-4 demultiplexer applications. The inputs include clamp diodes, enabling the use of current limiting resistors to interface with voltages exceeding VCC.
Key Specifications
| Parameter | Description |
|---|---|
| Type Number | 74HCT139D |
| Orderable Part Number | 74HCT139D,653 |
| Package | SO16 (SOT109-1) |
| Input Levels | TTL level |
| Enable Input | Active LOW, forces all outputs HIGH when set HIGH |
| ESD Protection | HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V |
| Operating Temperature | -40 °C to +85 °C and -40 °C to +125 °C |
| Compliance | Complies with JEDEC standard no. 7A |
Key Features
- Dual 2-to-4 line decoder/demultiplexer functionality.
- Two binary weighted address inputs (nA0, nA1) to four mutually exclusive outputs (nY0 to nY3).
- Enable input (nE) for demultiplexer applications.
- Inputs include clamp diodes for voltage protection.
- Suitable for memory decoding, data routing, or code conversion.
- High ESD protection: HBM exceeds 2000 V and CDM exceeds 1000 V.
Applications
The 74HCT139D is versatile and can be used in various applications across different industries, including:
- Memory decoding and addressing.
- Data routing and switching.
- Code conversion and digital logic circuits.
- Automotive and industrial control systems.
- Consumer electronics and mobile devices.
- Computing and power management systems.
Q & A
- What is the primary function of the 74HCT139D?
The primary function is to decode two binary weighted address inputs into four mutually exclusive outputs, and it can also be used as a 1-to-4 demultiplexer.
- What type of input levels does the 74HCT139D support?
The 74HCT139D supports TTL (Transistor-Transistor Logic) input levels.
- What is the role of the enable input (nE) in the 74HCT139D?
The enable input (nE) forces all outputs to HIGH when set HIGH, allowing for demultiplexer applications.
- What kind of ESD protection does the 74HCT139D offer?
The 74HCT139D offers high ESD protection: HBM exceeds 2000 V and CDM exceeds 1000 V.
- What is the operating temperature range of the 74HCT139D?
The operating temperature range is from -40 °C to +85 °C and from -40 °C to +125 °C.
- What package type is the 74HCT139D available in?
The 74HCT139D is available in the SO16 (SOT109-1) package.
- Is the 74HCT139D compliant with any specific standards?
Yes, it complies with JEDEC standard no. 7A.
- What are some common applications of the 74HCT139D?
Common applications include memory decoding, data routing, code conversion, automotive and industrial control systems, consumer electronics, and computing systems.
- How can I obtain the 74HCT139D from Nexperia?
You can order the 74HCT139D through Nexperia's official distributors or directly from Nexperia if you have a direct account.
- Are there any evaluation boards available for the 74HCT139D?
Yes, Nexperia offers various evaluation boards to help you assess the performance and suitability of the 74HCT139D for your application.
