Overview
The 74HC139D/C4118, produced by NXP USA Inc., is a high-speed CMOS dual 2-to-4 line decoder/demultiplexer. This integrated circuit is fabricated using silicon gate C2MOS technology, which combines the high speed of LSTTL with the low power dissipation characteristics of CMOS devices. The 74HC139D features two independent 2-to-4 decoders, each with an enable input that can be used for gating or as a data input for demultiplexing applications. When the enable input is held high, all four outputs are fixed at a high logic level, independent of the other inputs.
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 74HC139D | 2.0 - 6.0 | CMOS | ± 5.2 | 14 | Low | -40 to +125 | 92 | 9.3 | 51 | SO16 (SOT109-1) |
Key Features
- High speed operation with a propagation delay time of 10 ns (typ.) at VCC = 5 V
- Low power dissipation: ICC = 4.0 µA (max) at Ta = 25 °C
- Balanced propagation delays: tPLH ≈ tPHL
- Wide operating voltage range: VCC(opr) = 2.0 to 6.0 V
- Active LOW mutually exclusive outputs
- ESD protection: HBM (ANSI/ESDA/JEDEC JS-001 class 2) exceeds 2000 V, CDM (ANSI/ESDA/JEDEC JS-002 class C3) exceeds 1000 V
- All inputs equipped with protection circuits against static discharge or transient excess voltage
Applications
- Suitable for memory decoding, data routing, or code conversion
- Can be used in demultiplexing applications where the enable input serves as the data input
- Applicable in various digital systems requiring high-speed decoding and demultiplexing functions
Q & A
- What is the primary function of the 74HC139D?
The 74HC139D is a dual 2-to-4 line decoder/demultiplexer, decoding two binary weighted address inputs to four mutually exclusive outputs.
- What is the operating voltage range of the 74HC139D?
The operating voltage range is from 2.0 V to 6.0 V.
- What is the typical propagation delay time of the 74HC139D?
The typical propagation delay time is 10 ns at VCC = 5 V.
- Does the 74HC139D have ESD protection?
- What package type is the 74HC139D available in?
The 74HC139D is available in the SO16 (SOT109-1) package.
- Can the enable input be used for demultiplexing applications?
- What are the temperature ranges for the 74HC139D?
The specified temperature range is from -40 °C to +125 °C.
- Does the 74HC139D comply with any industry standards?
- What is the output drive capability of the 74HC139D?
The output drive capability is ± 5.2 mA.
- Are the inputs protected against static discharge?
