Overview
The SN74LS138DRG4 is a 3-to-8 line decoder/demultiplexer integrated circuit produced by Texas Instruments. This component is part of the 74LS series, known for its high-speed and low power consumption. It is designed for use in high-performance memory decoding and data-routing applications, where short propagation delay times are crucial. The device features Schottky-clamped TTL MSI circuits, which enhance its performance by suppressing line-ringing and simplifying system design.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 16-SOIC (Small Outline Integrated Circuit) |
| Pins | 16 |
| Operating Temperature Range | 0°C to 70°C |
| Voltage Supply | 4.75 V to 5.25 V (Single Supply) |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Lead Free Status / RoHS Status | Lead free / RoHS Compliant |
| Current - Output High, Low | 400µA, 8mA |
| Circuit Configuration | 1 x 3:8 Decoder/Demultiplexer |
Key Features
- Designed specifically for high-speed applications such as memory decoders and data transmission systems.
- Features three enable inputs to simplify cascading and/or data reception.
- Schottky-clamped for high performance, which helps in suppressing line-ringing and simplifying system design.
- Fully buffered inputs, each representing only one normalized load to its driving circuit.
- Can be used to implement 24-line and 32-line decoders without or with minimal external inverters.
- Enable input can be used as a data input for demultiplexing applications.
Applications
- High-performance memory decoding systems to minimize system decoding delays.
- Data-routing applications requiring short propagation delay times.
- Demultiplexing applications where the enable input can be used as a data input.
- Cascading decoders to create higher line count decoders (e.g., 24-line or 32-line decoders).
Q & A
- What is the SN74LS138DRG4 used for?
The SN74LS138DRG4 is used in high-performance memory decoding and data-routing applications.
- What is the operating temperature range of the SN74LS138DRG4?
The operating temperature range is from 0°C to 70°C.
- What type of package does the SN74LS138DRG4 come in?
The SN74LS138DRG4 comes in a 16-SOIC package.
- What is the voltage supply range for the SN74LS138DRG4?
The voltage supply range is from 4.75 V to 5.25 V.
- Is the SN74LS138DRG4 RoHS compliant?
Yes, the SN74LS138DRG4 is lead free and RoHS compliant.
- How many enable inputs does the SN74LS138DRG4 have?
The SN74LS138DRG4 has three enable inputs.
- Can the SN74LS138DRG4 be used for demultiplexing applications?
Yes, the enable input can be used as a data input for demultiplexing applications.
- What is the current output high and low for the SN74LS138DRG4?
The current output high is 400µA, and the current output low is 8mA.
- Is the SN74LS138DRG4 suitable for cascading to create higher line count decoders?
Yes, it can be used to implement 24-line and 32-line decoders with minimal external components.
- What is the moisture sensitivity level (MSL) of the SN74LS138DRG4?
The MSL is 1 (Unlimited).
