Overview
The SN74ALS138ADE4 is a 3-line to 8-line decoder/demultiplexer manufactured by Texas Instruments. This device is designed for high-performance memory-decoding or data-routing applications, particularly in systems that require very short propagation delay times. It is part of the ALS series, known for its advanced Schottky-clamped technology, which minimizes system decoding delays and is suitable for use with high-speed memories and fast enable circuits.
Key Specifications
| Parameter | Value |
|---|---|
| Status | ACTIVE |
| Logic IC Type | OTHER DECODER/DRIVER |
| Sub Category | Decoder/Drivers |
| Family | ALS |
| JESD-30 Code | R-PDSO-G16 |
| Load Capacitance (CL) | 50.0 pF |
| Max I(ol) | 0.008 Amp |
| Number of Functions | 1 |
| Number of Terminals | 16 |
| Operating Temperature-Min | 0.0 °C |
| Operating Temperature-Max | 70.0 °C |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Code | SOP |
| Package Equivalence Code | SOP16, .25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Power Supply Current-Max (ICC) | 10.0 mA |
| Propagation Delay (tpd) | 18.0 ns |
| Supply Voltage-Nom (Vsup) | 5 V |
| Supply Voltage-Min (Vsup) | 4.5 V |
| Supply Voltage-Max (Vsup) | 5.5 V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27 mm |
Key Features
- 3-line to 8-line decoder/demultiplexer functionality, ideal for high-performance memory-decoding and data-routing applications.
- Short propagation delay times, making it suitable for use in high-speed systems.
- Incorporates three enable inputs to simplify cascading and data reception.
- Available in various package options, including plastic small-outline (D) packages, ceramic chip carriers (FK), and standard plastic (N) and ceramic (J) 300-mil DIPs.
- Operates with a supply voltage of 4.5V to 5.5V.
- Surface mount type with a small outline package (SOIC).
- TTL technology for compatibility with a wide range of logic circuits.
Applications
- Time division multiplexing systems.
- Frequency multiplexing systems.
- A/D and D/A converters.
- Implementing boolean functions with multiple variables.
- Data collection systems.
- Audio, video, and image transmission systems.
- Recording transmission systems.
Q & A
- What is the primary function of the SN74ALS138ADE4?
The SN74ALS138ADE4 is a 3-line to 8-line decoder/demultiplexer designed for high-performance memory-decoding or data-routing applications.
- What is the operating temperature range of the SN74ALS138ADE4?
The device operates from 0°C to 70°C.
- What is the supply voltage range for the SN74ALS138ADE4?
The supply voltage range is from 4.5V to 5.5V.
- What package types are available for the SN74ALS138ADE4?
The device is available in plastic small-outline (D) packages, among others.
- What technology does the SN74ALS138ADE4 use?
The device uses TTL (Transistor-Transistor Logic) technology.
- What are some common applications of the SN74ALS138ADE4?
Common applications include time division multiplexing, frequency multiplexing, A/D and D/A converters, and data collection systems.
- How many enable inputs does the SN74ALS138ADE4 have?
The device incorporates three enable inputs.
- What is the propagation delay of the SN74ALS138ADE4?
The propagation delay (tpd) is 18.0 ns.
- Is the SN74ALS138ADE4 suitable for high-speed systems?
Yes, it is designed for high-performance systems requiring very short propagation delay times.
- What is the maximum power supply current for the SN74ALS138ADE4?
The maximum power supply current (ICC) is 10.0 mA.
