Overview
The 74HC238DB,118 is a 3-to-8 line decoder/demultiplexer produced by Nexperia USA Inc. This CMOS device is part of the 74HC series and is known for its high-speed and low power consumption. It decodes three binary weighted address inputs (A0, A1, and A2) to eight mutually exclusive active HIGH outputs (Y0 to Y7). The device features three enable inputs (E1, E2, and E3), allowing for flexible control over the output states. This component is widely used in various digital circuits for decoding and demultiplexing applications.
Key Specifications
| Parameter | Value |
|---|---|
| Type | Decoder/Demultiplexer |
| Package / Case | 16-SSOP (0.209, 5.30mm Width) |
| Number of Pins | 16 |
| Operating Temperature | -40°C to 125°C |
| Voltage - Supply | 2V to 6V |
| Propagation Delay | 50 ns |
| Quiescent Current | 8μA |
| Current - Output High, Low | 5.2mA, 5.2mA |
| Number of Input Lines | 3 |
| Number of Output Lines | 8 |
| Logic Function | Decoder, Demultiplexer |
| Technology | CMOS |
| RoHS Status | RoHS Compliant |
Key Features
- Wide Supply Voltage Range: Operates from 2.0V to 6.0V, making it versatile for various applications.
- CMOS Low Power Dissipation: Low power consumption, ideal for battery-powered devices and energy-efficient designs.
- High Noise Immunity: Provides robust performance in noisy environments.
- Demultiplexing Capability: Can be used as an eight-output demultiplexer by utilizing the enable inputs as strobes.
- Multiple Input Enable: Features three enable inputs (E1, E2, and E3) for easy expansion and control.
- Ideal for Memory Chip Select Decoding: Suitable for decoding memory chip select lines due to its mutually exclusive outputs.
- Active HIGH Mutually Exclusive Outputs: Ensures that only one output is HIGH at a time, preventing conflicts.
- ESD Protection: Complies with HBM and CDM standards, providing protection against electrostatic discharge.
- Multiple Package Options: Available in various package types, including SSOP16).
Applications
- Memory Chip Select Decoding: Used in memory systems to select specific memory chips based on address inputs).
- Demultiplexing: Can be used to demultiplex data from a single input line to multiple output lines).
- Instruction Decoding: Utilized in microprocessor systems for instruction decoding and control).
- Digital Circuits: Employed in various digital circuits requiring decoding and demultiplexing functions).
Q & A
- What is the primary function of the 74HC238DB,118?
The primary function is to decode three binary weighted address inputs to eight mutually exclusive active HIGH outputs, and it can also be used as a demultiplexer).
- What is the operating temperature range of the 74HC238DB,118?
The operating temperature range is from -40°C to 125°C).
- What is the supply voltage range for the 74HC238DB,118?
The supply voltage range is from 2.0V to 6.0V).
- How many enable inputs does the 74HC238DB,118 have?
The device has three enable inputs (E1, E2, and E3)).
- What is the propagation delay of the 74HC238DB,118?
The propagation delay is 50 ns).
- Is the 74HC238DB,118 RoHS compliant?
Yes, the 74HC238DB,118 is RoHS compliant).
- What are the typical applications of the 74HC238DB,118?
Typical applications include memory chip select decoding, demultiplexing, and instruction decoding in microprocessor systems).
- How many output lines does the 74HC238DB,118 have?
The device has eight output lines (Y0 to Y7)).
- What technology is used in the 74HC238DB,118?
The device uses CMOS technology).
- Can the 74HC238DB,118 be expanded for more complex decoding?
Yes, it can be expanded to a 1-of-32 decoder using four '238 ICs and one inverter).
