Texas Instruments
Slika može predstavljati.
Pogledajte specifikacije za pojedinosti o proizvodu.
SN74ALS138ANG4
Pogledaj detalje Podatkovne tablice

SN74ALS138ANG4

Product Overview

Category

SN74ALS138ANG4 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in digital electronics for decoding applications.

Characteristics

  • High-speed operation
  • Low power consumption
  • Wide operating voltage range
  • Three-state outputs
  • TTL compatibility

Package

SN74ALS138ANG4 is available in a 16-pin DIP (Dual In-line Package) format.

Essence

The essence of SN74ALS138ANG4 lies in its ability to decode binary information and select one out of eight outputs based on the input signals.

Packaging/Quantity

SN74ALS138ANG4 is typically packaged in reels or tubes, with each reel containing 2,000 units.

Specifications

  • Supply Voltage: 4.5V to 5.5V
  • Input Voltage: 0V to VCC
  • Output Voltage: 0V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay Time: 15ns (max)
  • Output Current: ±24mA

Detailed Pin Configuration

  1. G1 (Enable Input G1)
  2. G2A (Enable Input G2A)
  3. G2B (Enable Input G2B)
  4. A0 (Address Input A0)
  5. A1 (Address Input A1)
  6. A2 (Address Input A2)
  7. Y0 (Output Y0)
  8. Y1 (Output Y1)
  9. Y2 (Output Y2)
  10. Y3 (Output Y3)
  11. Y4 (Output Y4)
  12. Y5 (Output Y5)
  13. Y6 (Output Y6)
  14. Y7 (Output Y7)
  15. VCC (Positive Power Supply)
  16. GND (Ground)

Functional Features

SN74ALS138ANG4 is a 3-to-8 line decoder/demultiplexer with three enable inputs (G1, G2A, and G2B). It decodes the binary information from the address inputs (A0, A1, and A2) and selects one of the eight outputs (Y0 to Y7) based on the input combination.

Advantages and Disadvantages

Advantages

  • High-speed operation allows for quick decoding.
  • Low power consumption helps in energy-efficient designs.
  • Wide operating voltage range provides flexibility in various applications.
  • Three-state outputs allow for easy interfacing with other devices.
  • TTL compatibility ensures compatibility with existing digital systems.

Disadvantages

  • Limited to 3-to-8 line decoding, not suitable for larger decoding requirements.
  • Propagation delay time may affect timing-sensitive applications.

Working Principles

SN74ALS138ANG4 works by receiving binary address inputs (A0, A1, and A2) and enabling inputs (G1, G2A, and G2B). Based on the input combination, it activates one of the eight outputs (Y0 to Y7) while keeping the rest in a high-impedance state.

Detailed Application Field Plans

SN74ALS138ANG4 finds applications in various fields, including: 1. Address decoding in microprocessors and microcontrollers. 2. Memory selection in RAM and ROM systems. 3. Data routing in multiplexers and demultiplexers. 4. Signal decoding in communication systems. 5. Control logic in digital circuits.

Detailed and Complete Alternative Models

Some alternative models that serve similar functions to SN74ALS138ANG4 are: 1. SN74LS138N 2. CD74HC138E 3. MC74HC138AN 4. 74HC138D

These models offer similar decoding capabilities and can be used as alternatives depending on specific requirements.

Word count: 515 words

Navedite 10 uobičajenih pitanja i odgovora vezanih uz primjenu SN74ALS138ANG4 u tehničkim rješenjima

Sure! Here are 10 common questions and answers related to the application of SN74ALS138ANG4 in technical solutions:

  1. Q: What is SN74ALS138ANG4? A: SN74ALS138ANG4 is a 3-to-8 line decoder/demultiplexer integrated circuit (IC) commonly used in digital electronics.

  2. Q: What is the purpose of SN74ALS138ANG4? A: SN74ALS138ANG4 is used to decode binary information from a microcontroller or other digital device into multiple output lines, enabling the selection of one out of eight possible outputs.

  3. Q: What is the maximum operating voltage for SN74ALS138ANG4? A: The maximum operating voltage for SN74ALS138ANG4 is typically 5.5 volts.

  4. Q: How many input lines does SN74ALS138ANG4 have? A: SN74ALS138ANG4 has three input lines (A0, A1, and A2) that can be used to select one of the eight output lines.

  5. Q: What is the output format of SN74ALS138ANG4? A: The output format of SN74ALS138ANG4 is active-low, which means that when an output is selected, it will be pulled low (logic 0) while all other outputs remain high (logic 1).

  6. Q: Can SN74ALS138ANG4 be cascaded to increase the number of output lines? A: Yes, SN74ALS138ANG4 can be cascaded by connecting the enable (E1, E2) inputs of multiple ICs together, allowing for the expansion of output lines beyond eight.

  7. Q: What is the typical propagation delay of SN74ALS138ANG4? A: The typical propagation delay of SN74ALS138ANG4 is around 10 nanoseconds.

  8. Q: What is the maximum output current that SN74ALS138ANG4 can sink/source? A: SN74ALS138ANG4 can typically sink/source up to 24 milliamperes (mA) of current per output pin.

  9. Q: Can SN74ALS138ANG4 be used in both TTL and CMOS logic systems? A: Yes, SN74ALS138ANG4 is compatible with both TTL and CMOS logic systems, making it versatile for various applications.

  10. Q: What are some common applications of SN74ALS138ANG4? A: SN74ALS138ANG4 is commonly used in address decoding, memory selection, data routing, and general-purpose digital multiplexing applications.

Please note that the answers provided here are general and may vary depending on specific datasheet specifications and application requirements.