Overview
The SN74ALS138ADG4 is a high-performance decoder/demultiplexer integrated circuit produced by Texas Instruments. This component is part of the ALS (Advanced Low-power Schottky) series and is designed for use in high-speed memory decoding and data-routing applications. It features Schottky-clamped TTL (Transistor-Transistor Logic) technology, which enhances its performance by reducing propagation delay times and suppressing line-ringing. The device is particularly useful in systems requiring fast enable circuits and minimal system decoding delays.
Key Specifications
| Specification | Value |
|---|---|
| Logic IC Type | OTHER DECODER/DRIVER |
| Family | ALS |
| Number of Terminals | 16 |
| Package Code | SOP16, .25 |
| Operating Temperature Range | 0°C to 70°C |
| Supply Voltage (Nominal) | 5 V |
| Supply Voltage (Min/Max) | 4.5 V / 5.5 V |
| Propagation Delay (tpd) | 18 ns |
| Output Polarity | Inverted |
| Power Supply Current (Max) | 10 mA |
| Load Capacitance (CL) | 50 pF |
| Surface Mount | YES |
Key Features
- High-Speed Performance: Designed for high-speed memory decoding and data-routing applications with short propagation delay times.
- Schottky-Clamped TTL Technology: Enhances performance by reducing propagation delay times and suppressing line-ringing.
- Enable Inputs: Three enable inputs (two active-low and one active-high) simplify cascading and data reception, reducing the need for external gates or inverters.
- Fully Buffered Inputs: Each input represents only one normalized load to its driving circuit.
- Demultiplexing Capability: An enable input can be used as a data input for demultiplexing applications.
Applications
- High-Performance Memory Systems: Used to minimize system decoding delays in high-speed memory systems.
- Data Transmission Systems: Suitable for applications requiring fast data transmission and decoding.
- Decoding and Demultiplexing: Can be used to decode one of eight lines based on the conditions at the three binary select inputs and the three enable inputs.
Q & A
- What is the primary function of the SN74ALS138ADG4?
The primary function of the SN74ALS138ADG4 is to act as a decoder/demultiplexer in high-speed memory decoding and data-routing applications.
- What technology does the SN74ALS138ADG4 use?
The SN74ALS138ADG4 uses Schottky-clamped TTL (Transistor-Transistor Logic) technology.
- What is the operating temperature range of the SN74ALS138ADG4?
The operating temperature range is from 0°C to 70°C.
- How many enable inputs does the SN74ALS138ADG4 have?
The device has three enable inputs: two active-low and one active-high.
- Can the SN74ALS138ADG4 be used for demultiplexing?
Yes, an enable input can be used as a data input for demultiplexing applications.
- What is the propagation delay of the SN74ALS138ADG4?
The propagation delay (tpd) is 18 ns.
- What is the supply voltage range for the SN74ALS138ADG4?
The supply voltage range is from 4.5 V to 5.5 V, with a nominal voltage of 5 V.
- Is the SN74ALS138ADG4 RoHS compliant?
Yes, the SN74ALS138ADG4 is RoHS compliant.
- What package type is the SN74ALS138ADG4 available in?
The device is available in a 16-pin SOIC (Small Outline Integrated Circuit) package.
- What are the typical applications of the SN74ALS138ADG4?
Typical applications include high-performance memory systems, data transmission systems, and decoding/demultiplexing applications.
