Overview
The CD74AC138M is a 3-to-8 line decoder/demultiplexer produced by Texas Instruments. This component is designed for high-performance memory-decoding and data-routing applications, particularly those requiring very short propagation-delay times. Although the CD74AC138M is no longer in production, it remains relevant for existing systems and legacy designs.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOIC (D) |
| Pins | 16 |
| Operating Temperature Range (°C) | -55 to 125 |
| Supply Voltage Range | 1.5V to 5.5V |
| Output Drive Current | ±24mA |
| Fanout | Up to 15 F Devices |
| ESD Protection | Exceeds 2kV per MIL-STD-883, method 3015 |
Key Features
- AC types feature 1.5V to 5.5V operation and balanced noise immunity at 30% of the supply voltage.
- Speed of bipolar F, AS, and S, with significantly reduced power consumption.
- Designed specifically for high-speed memory decoders and data-transmission systems.
- Incorporate three enable inputs to simplify cascading and/or data reception.
- Balanced propagation delays.
- SCR-latchup-resistant CMOS process and circuit design.
Applications
The CD74AC138M is particularly suited for high-performance memory-decoding and data-routing applications. It is used in high-speed memory systems to minimize the effects of system decoding. These decoders are also useful in data-transmission systems where short propagation-delay times are critical.
Q & A
- What is the primary function of the CD74AC138M?
The CD74AC138M is a 3-to-8 line decoder/demultiplexer designed for high-performance memory-decoding and data-routing applications.
- What is the operating temperature range of the CD74AC138M?
The operating temperature range is -55°C to 125°C.
- What is the supply voltage range for the CD74AC138M?
The supply voltage range is 1.5V to 5.5V.
- What is the output drive current of the CD74AC138M?
The output drive current is ±24mA.
- How many enable inputs does the CD74AC138M have?
The CD74AC138M incorporates three enable inputs.
- What type of ESD protection does the CD74AC138M have?
The CD74AC138M exceeds 2kV ESD protection per MIL-STD-883, method 3015.
- Is the CD74AC138M still in production?
No, the CD74AC138M is no longer in production.
- What package type is the CD74AC138M available in?
The CD74AC138M is available in SOIC (D) package with 16 pins.
- What is the fanout capability of the CD74AC138M?
The fanout capability is up to 15 F Devices.
- What are some key applications of the CD74AC138M?
It is used in high-speed memory systems and data-transmission systems where short propagation-delay times are critical.
