MC74HC138ADR2G

Product Overview

• Category: Integrated Circuit
• Use: Decoder/Demultiplexer
• Characteristics: High-Speed CMOS Logic, 3-to-8 Line Decoder/Demultiplexer
• Package: SOIC-16
• Essence: The MC74HC138ADR2G is a decoder/demultiplexer IC that converts a binary input into a corresponding output line. It is designed for high-speed applications and operates on CMOS logic.
• Packaging/Quantity: The MC74HC138ADR2G is available in a standard SOIC-16 package and is typically sold in reels of 2500 units.

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage: -0.5V to VCC + 0.5V
• Output Voltage: -0.5V to VCC + 0.5V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 15 ns (max)
• Output Current: ±25 mA
• Logic Family: HC

Pin Configuration

The MC74HC138ADR2G has a total of 16 pins arranged as follows:

+---+--+---+ A0 --|1 +--+ 16|-- VCC A1 --|2 15|-- Y7 A2 --|3 14|-- Y6 GND --|4 13|-- Y5 Y0 --|5 12|-- Y4 Y1 --|6 74HC 11|-- Y3 Y2 --|7 138A 10|-- Y2 E1 --|8 DR2G 9|-- E2 +----------+

Functional Features

The MC74HC138ADR2G is a 3-to-8 line decoder/demultiplexer with active-low outputs. It accepts three binary inputs (A0, A1, and A2) and generates eight output lines (Y0 to Y7). The enable inputs (E1 and E2) control the operation of the decoder. When both E1 and E2 are high, the decoder is enabled, and the selected output line is determined by the binary input. The MC74HC138ADR2G is designed for high-speed applications and offers low power consumption.

Advantages and Disadvantages

Advantages: - High-speed operation - Low power consumption - Wide operating voltage range - Compact SOIC-16 package - Active-low outputs for easy interfacing

Disadvantages: - Limited number of input lines (3-to-8) - Not suitable for complex decoding tasks

Working Principles

The MC74HC138ADR2G operates based on the principles of digital logic. The binary input lines (A0, A1, and A2) determine which output line (Y0 to Y7) will be activated. The enable inputs (E1 and E2) control the overall operation of the decoder. When both enable inputs are high, the decoder is enabled, and the selected output line reflects the binary input. The MC74HC138ADR2G utilizes CMOS technology for high-speed operation and low power consumption.

Detailed Application Field Plans

The MC74HC138ADR2G can be used in various applications that require decoding or demultiplexing functions. Some potential application fields include: - Address decoding in microcontrollers and microprocessors - Memory selection in RAM and ROM systems - Data routing in communication systems - Signal demultiplexing in digital multiplexers - Control signal generation in industrial automation

Detailed and Complete Alternative Models

• SN74HC138N: Similar 3-to-8 line decoder/demultiplexer IC from Texas Instruments
• CD74HC138E: High-speed CMOS logic decoder/demultiplexer from Texas Instruments
• 74HCT138: 3-to-8 line decoder/demultiplexer with TTL-compatible inputs from NXP Semiconductors
• CD4017BE: Decade counter/divider with 10 decoded outputs from Texas Instruments

These alternative models offer similar functionality to the MC74HC138ADR2G and can be considered as alternatives based on specific requirements.

In conclusion, the MC74HC138ADR2G is a high-speed CMOS logic decoder/demultiplexer IC that converts binary input into corresponding output lines. It offers advantages such as low power consumption, wide operating voltage range, and compact package size. However, it has limitations in terms of the number of input lines and complexity of decoding tasks. The MC74HC138ADR2G finds applications in various fields