Overview
The CD74HC238M96E4 is a high-speed CMOS logic 3-to-8 line decoder/demultiplexer produced by Texas Instruments. This component is part of the HC/UH family and is designed for applications requiring efficient data routing and decoding. It features three address select inputs (A2, A1, and A0) and three enable inputs (G2, G1, and G0) to simplify cascading and demultiplexing operations.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package Type | Small Outline IC (SOIC) | 16 pins |
| Package Dimensions | 9.90 mm x 3.90 mm | |
| Operating Temperature Range | -55°C to 125°C | |
| Supply Voltage Range | 2 V to 6 V | |
| Propagation Delay (Address to Output) | Typical: 13 ns at VCC = 5 V, CL = 15 pF, TA = 25°C | |
| Output Transition Time | Typical: 15 ns at CL = 15 pF | |
| Input Capacitance | 10 pF | |
| Power Dissipation Capacitance | 67 pF at CL = 15 pF | |
| Enable Inputs | Two active low (G1, G0) and one active high (G2) | |
| Output Polarity | Active high when selected | |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
Key Features
- Select one of eight data outputs: Active high for '238.
- Three enable inputs (G2, G1, and G0) to simplify cascading and demultiplexing.
- Typical propagation delay of 13 ns at VCC = 5 V, CL = 15 pF, TA = 25°C.
- Fanout: Bus driver outputs support 15 LSTTL loads, standard outputs support 10 LSTTL loads.
- Wide operating temperature range: -55°C to 125°C.
- High noise immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5 V.
- CMOS input compatibility with low input current (Il ≤ 1µA at VOL, VOH).
- Significant power reduction compared to LSTTL logic ICs.
Applications
The CD74HC238M96E4 is well-suited for various applications including:
- Memory address decoding.
- Data routing and demultiplexing.
- I/O port or memory selectors.
- High-speed digital systems requiring efficient decoding and routing.
Q & A
- What is the primary function of the CD74HC238M96E4?
The primary function is to act as a 3-to-8 line decoder/demultiplexer.
- What are the operating voltage ranges for this component?
The operating voltage range is from 2 V to 6 V.
- What is the typical propagation delay of the CD74HC238M96E4?
The typical propagation delay is 13 ns at VCC = 5 V, CL = 15 pF, TA = 25°C.
- How many enable inputs does the CD74HC238M96E4 have?
It has three enable inputs: two active low (G1, G0) and one active high (G2).
- What is the output polarity when selected?
The output is active high when selected.
- What is the input capacitance of the CD74HC238M96E4?
The input capacitance is 10 pF.
- Is the CD74HC238M96E4 RoHS compliant?
Yes, it is RoHS compliant.
- What is the package type of the CD74HC238M96E4?
The package type is Small Outline IC (SOIC) with 16 pins.
- What are the dimensions of the SOIC package?
The dimensions are 9.90 mm x 3.90 mm.
- What is the operating temperature range of the CD74HC238M96E4?
The operating temperature range is -55°C to 125°C.
