Overview
The 74HC139D,652 is a dual 2-to-4 line decoder/demultiplexer produced by NXP Semiconductors. This integrated circuit is part of the 74HC series 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, enabling the device to function as a 1-to-4 demultiplexer as well.
The device is suitable for various applications, including memory decoding, data routing, and code conversion. It complies with JEDEC standard no. 7A and offers high-speed operation with low power dissipation.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Type Number | 74HC139D | |
| Package | 16-SOIC (SOT109-1) | |
| Voltage Supply | 2.0 - 6.0 V | Single Supply |
| Logic Switching Levels | CMOS | |
| Output Drive Capability | ± 5.2 mA | |
| Propagation Delay (tpd) | 14 ns | |
| Operating Temperature | -40°C to +85°C | |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | |
| ESD Protection | HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V |
Key Features
- Dual 2-to-4 line decoder/demultiplexer with two independent decoders.
- Each decoder accepts two binary weighted inputs and produces four mutually exclusive outputs.
- Enable input (nE) allows for 1-to-4 demultiplexer functionality.
- Inputs include clamp diodes for interfacing with voltages in excess of VCC.
- High-speed operation with low power dissipation.
- Complies with JEDEC standard no. 7A.
- Active LOW mutually exclusive outputs.
- ESD protection: HBM exceeds 2000 V, CDM exceeds 1000 V.
Applications
- Memory decoding
- Data routing
- Code conversion
- General-purpose decoding and demultiplexing in digital circuits.
- Used in various industries such as automotive, industrial, computing, consumer electronics, and mobile devices.
Q & A
- What is the primary function of the 74HC139D?
The primary function of the 74HC139D is to act as a dual 2-to-4 line decoder/demultiplexer.
- What are the input and output configurations of the 74HC139D?
The device decodes two binary weighted address inputs (nA0, nA1) into four mutually exclusive outputs (nY0 to nY3) for each of its two independent decoders.
- What is the role of the enable input (nE) in the 74HC139D?
The enable input (nE) forces all outputs to HIGH when set HIGH, allowing the device to function as a 1-to-4 demultiplexer.
- What are the voltage supply requirements for the 74HC139D?
The device operates with a single supply voltage ranging from 2.0 to 6.0 V.
- What are the logic switching levels for the 74HC139D?
The logic switching levels are CMOS.
- What is the propagation delay (tpd) of the 74HC139D?
The propagation delay is 14 ns.
- What is the operating temperature range for the 74HC139D?
The operating temperature range is -40°C to +85°C.
- Does the 74HC139D have ESD protection?
Yes, it has ESD protection: HBM exceeds 2000 V, CDM exceeds 1000 V.
- What are some common applications of the 74HC139D?
Common applications include memory decoding, data routing, code conversion, and general-purpose decoding and demultiplexing in digital circuits.
- Is the 74HC139D RoHS compliant?
Yes, the 74HC139D is RoHS compliant.
