CD74ACT139ME4

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: High-speed, low-power, TTL-compatible
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Decodes binary inputs into multiple outputs
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 5.5ns (typical)
• Output Current: ±24mA

Detailed Pin Configuration

The CD74ACT139ME4 has a total of 16 pins arranged as follows:

__ __ 1 | \__/ | 16 2 | | 15 3 | | 14 4 | | 13 5 | | 12 6 | | 11 7 | | 10 8 |________| 9

Pin Description: 1. GND: Ground 2. A0: Binary input A0 3. A1: Binary input A1 4. E1: Enable input 1 5. Y0: Output Y0 6. Y1: Output Y1 7. E2: Enable input 2 8. Y2: Output Y2 9. VCC: Supply voltage

Functional Features

• Decodes two binary inputs (A0 and A1) into four mutually exclusive outputs (Y0, Y1, Y2).
• The enable inputs (E1 and E2) control the operation of the decoder.
• When E1 is low, the decoder is enabled and responds to changes in A0 and A1 inputs.
• When E2 is low, the decoder is enabled and responds to changes in A0 and A1 inputs.

Advantages

• High-speed operation allows for quick decoding of binary inputs.
• Low-power consumption makes it suitable for battery-powered devices.
• TTL-compatible inputs ensure compatibility with a wide range of digital systems.
• Small package size (SOIC) enables space-efficient circuit design.

Disadvantages

• Limited number of outputs (4) may not be sufficient for certain applications requiring more outputs.
• Requires external components for proper voltage regulation and protection.

Working Principles

The CD74ACT139ME4 operates based on the principles of digital logic. It uses the binary inputs (A0 and A1) to select one of the four outputs (Y0, Y1, Y2). The enable inputs (E1 and E2) control the operation of the decoder. When an enable input is low, the decoder responds to changes in the corresponding binary inputs. The selected output becomes active (low) while the other outputs remain inactive (high).

Detailed Application Field Plans

The CD74ACT139ME4 can be used in various applications, including: 1. Address decoding in microprocessors and memory systems. 2. Data routing and selection in multiplexers and data selectors. 3. Control signal generation in digital circuits. 4. Logic function implementation in combinational circuits.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the CD74ACT139ME4 are: 1. 74HC139: CMOS version with similar pin configuration and characteristics. 2. SN54LS139: Low-power Schottky version with comparable specifications. 3. CD4016: Quad bilateral switch with different functionality but similar package and pin count.

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