Overview
The 74HC138D is a 3-to-8 line decoder/demultiplexer with inverting outputs, manufactured by Nexperia. This integrated circuit decodes three binary weighted address inputs (A0, A1, and A2) to eight mutually exclusive outputs (Y0 to Y7). It features three enable inputs (E1, E2, and E3), allowing for easy parallel expansion and demultiplexing capabilities.
Key Specifications
| Parameter | Value |
|---|---|
| VCC (V) | 2.0 - 6.0 |
| Logic Switching Levels | CMOS |
| Output Drive Capability (mA) | ± 5.2 |
| tpd (ns) | 12 |
| Power Dissipation | Low |
| Tamb (°C) | -40 to +85, -40 to +125 |
| Package Name | SOT109-1 |
Key Features
- Decodes three binary weighted address inputs to eight mutually exclusive outputs.
- Three enable inputs for easy parallel expansion and demultiplexing.
- Wide supply voltage range from 2.0 to 6.0 V.
- CMOS low power dissipation.
- High noise immunity.
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level B.
- ESD protection: HBM exceeds 2000 V, CDM exceeds 1000 V.
- Multiple package options.
Applications
The 74HC138D is ideal for various applications including memory chip select decoding, demultiplexing, and in systems requiring multiple output selection based on binary inputs. It is used across industries such as automotive, industrial, power, computing, consumer, mobile, and wearables.
Q & A
- What is the function of the 74HC138D? The 74HC138D is a 3-to-8 line decoder/demultiplexer with inverting outputs.
- What are the input and output configurations of the 74HC138D? It decodes three binary weighted address inputs to eight mutually exclusive outputs.
- What are the enable inputs used for? The three enable inputs (E1, E2, and E3) allow for easy parallel expansion and demultiplexing capabilities.
- What is the supply voltage range of the 74HC138D? The supply voltage range is from 2.0 to 6.0 V.
- What are the logic switching levels for the 74HC138D? The logic switching levels are CMOS.
- What is the output drive capability of the 74HC138D? The output drive capability is ± 5.2 mA.
- What is the propagation delay of the 74HC138D? The propagation delay is 12 ns.
- Does the 74HC138D have ESD protection? Yes, it has ESD protection: HBM exceeds 2000 V, CDM exceeds 1000 V.
- What are the operating temperature ranges for the 74HC138D? The operating temperature ranges are from -40 °C to +85 °C and from -40 °C to +125 °C.
- What package options are available for the 74HC138D? Multiple package options are available, including SOT109-1.
