Overview
The CD74HC238PW is a high-speed CMOS logic 3-to-8 line decoder/demultiplexer produced by Texas Instruments. This device is well-suited for memory address decoding or data routing applications. It contains a single 3:8 decoder and features three address select inputs (A2, A1, and A0) and three strobe inputs (G2, G1, and G0) to simplify cascading and facilitate demultiplexing. The outputs of the CD74HC238 are normally high when selected, making it an inverting decoder/demultiplexer.
Key Specifications
| Parameter | Value |
|---|---|
| Logic Type | Decoder / Demultiplexer |
| No. of Outputs | 8 |
| Supply Voltage Min | 2V |
| Supply Voltage Max | 6V |
| Logic Case Style | TSSOP |
| No. of Pins | 16 |
| Operating Temperature Min | -55°C |
| Operating Temperature Max | 125°C |
| Package Type | TSSOP (Thin Shrink Small Outline Package) |
| Package Size | 5.00 mm × 4.40 mm |
| RoHS Compliant | Yes |
Key Features
- Select one of eight data outputs: Active high for '238.
- Three address select inputs (A2, A1, and A0).
- Three strobe inputs (G2, G1, and G0) to simplify cascading and facilitate demultiplexing.
- Outputs are normally high when selected.
- High-speed CMOS logic for efficient operation.
- Suitable for memory address decoding or data routing applications.
Applications
- Memory address decoding.
- Data routing applications.
- Cascading and demultiplexing in digital circuits.
- General-purpose decoding and demultiplexing in various electronic systems.
Q & A
- What is the primary function of the CD74HC238PW?
The primary function of the CD74HC238PW is to act as a 3-to-8 line decoder/demultiplexer.
- How many address select inputs does the CD74HC238PW have?
The CD74HC238PW has three address select inputs (A2, A1, and A0).
- What is the role of the strobe inputs in the CD74HC238PW?
The strobe inputs (G2, G1, and G0) are used to simplify cascading and facilitate demultiplexing. When any strobe input is active, all outputs are forced into the low state for the '238 function.
- What is the typical output state of the CD74HC238PW when an output is selected?
The outputs of the CD74HC238PW are normally high when selected.
- What is the operating voltage range of the CD74HC238PW?
The operating voltage range of the CD74HC238PW is from 2V to 6V.
- What is the package type of the CD74HC238PW?
The CD74HC238PW comes in a TSSOP (Thin Shrink Small Outline Package) with 16 pins.
- Is the CD74HC238PW RoHS compliant?
Yes, the CD74HC238PW is RoHS compliant.
- What are the typical applications of the CD74HC238PW?
The CD74HC238PW is typically used in memory address decoding, data routing applications, and general-purpose decoding and demultiplexing in digital circuits.
- What is the operating temperature range of the CD74HC238PW?
The operating temperature range of the CD74HC238PW is from -55°C to 125°C.
- How does the CD74HC238PW differ from the CD74HC138?
The CD74HC238PW has outputs that are normally high when selected, whereas the CD74HC138 has outputs that are normally low when selected.
