Overview
The 74HC138D/AUJ is a 3-to-8 line decoder/demultiplexer integrated circuit produced by NXP USA Inc., now part of Nexperia. This device is designed to decode three binary weighted address inputs (A0, A1, and A2) into eight mutually exclusive outputs (Y0 to Y7). It features three enable inputs (E1, E2, and E3) that allow for flexible control over the output states. The 74HC138D/AUJ is part of the 74HC family, known for its CMOS low power dissipation and high noise immunity, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| VCC | 2.0 - 6.0 V | Supply voltage range |
| Logic Switching Levels | CMOS | Logic level compatibility |
| Output Drive Capability | ± 5.2 mA | Maximum output current |
| tpd | 12 ns | Propagation delay time |
| Power Dissipation | Low | CMOS low power dissipation |
| Tamb | -40°C to +125°C | Operating temperature range |
| Package | SO16 (SOT109-1) | Package type and name |
| ESD Protection | HBM: >2000 V, CDM: >1000 V | Electrostatic discharge protection levels |
Key Features
- Decoding and Demultiplexing: Decodes three binary weighted address inputs to eight mutually exclusive outputs.
- Enable Inputs: Three enable inputs (E1, E2, and E3) allow for flexible control over output states.
- Low Power Dissipation: CMOS technology ensures low power consumption.
- High Noise Immunity: High noise immunity due to CMOS design.
- Latch-up Performance: Exceeds 100 mA per JESD 78 Class II Level B.
- ESD Protection: Compliant with ANSI/ESDA/JEDEC JS-001 Class 2 and JS-002 Class C3 standards.
- Multiple Package Options: Available in various packages, including SO16 (SOT109-1).
- Wide Operating Temperature Range: Operates from -40°C to +125°C.
Applications
- Memory Chip Select Decoding: Ideal for decoding memory chip select lines.
- Demultiplexing: Can be used as an eight-output demultiplexer by using one of the active LOW enable inputs as the data input.
- Industrial and Automotive Systems: Suitable for use in industrial and automotive applications due to its robustness and reliability.
- Consumer Electronics: Used in various consumer electronic devices requiring decoding and demultiplexing functions.
- Computing Systems: Can be integrated into computing systems for address decoding and data routing.
Q & A
- What is the primary function of the 74HC138D/AUJ IC?
The primary function is to decode three binary weighted address inputs into eight mutually exclusive outputs.
- What are the enable inputs used for in the 74HC138D/AUJ?
The three enable inputs (E1, E2, and E3) are used to control the output states, allowing for flexible operation.
- What is the supply voltage range for the 74HC138D/AUJ?
The supply voltage range is from 2.0 V to 6.0 V.
- What are the logic switching levels for the 74HC138D/AUJ?
The logic switching levels are CMOS compatible.
- What is the propagation delay time for the 74HC138D/AUJ?
The propagation delay time is approximately 12 ns.
- What is the operating temperature range for the 74HC138D/AUJ?
The operating temperature range is from -40°C to +125°C.
- What type of ESD protection does the 74HC138D/AUJ have?
The device has ESD protection exceeding 2000 V for HBM and 1000 V for CDM.
- Can the 74HC138D/AUJ be used as a demultiplexer?
Yes, it can be used as an eight-output demultiplexer by using one of the active LOW enable inputs as the data input.
- What are some common applications of the 74HC138D/AUJ?
Common applications include memory chip select decoding, demultiplexing, industrial and automotive systems, consumer electronics, and computing systems.
- What package options are available for the 74HC138D/AUJ?
The device is available in various packages, including SO16 (SOT109-1).
