SN74AHC139PW

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: High-speed, low-power consumption
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Dual 2-to-4 line decoder/demultiplexer
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2 V to 5.5 V
• Input Voltage Range: 0 V to VCC
• Output Voltage Range: 0 V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6 ns (typical)
• Output Current: ±8 mA

Detailed Pin Configuration

The SN74AHC139PW has a total of 16 pins, which are assigned as follows:

1. GND (Ground)
2. A0 (Address Input 0)
3. A1 (Address Input 1)
4. E1 (Enable Input 1)
5. Y0 (Output 0)
6. Y1 (Output 1)
7. GND (Ground)
8. Y2 (Output 2)
9. Y3 (Output 3)
10. E2 (Enable Input 2)
11. A2 (Address Input 2)
12. A3 (Address Input 3)
13. VCC (Supply Voltage)
14. Y4 (Output 4)
15. Y5 (Output 5)
16. GND (Ground)

Functional Features

The SN74AHC139PW is a dual 2-to-4 line decoder/demultiplexer IC. It takes two address inputs (A0-A3) and two enable inputs (E1, E2) to select one of the four outputs (Y0-Y5) based on the input address. The decoder/demultiplexer is designed to operate at high speed while consuming low power.

Advantages and Disadvantages

Advantages: - High-speed operation - Low-power consumption - Wide supply voltage range - Compact TSSOP package for space-saving applications

Disadvantages: - Limited number of output lines (6 in total) - Not suitable for complex decoding applications

Working Principles

The SN74AHC139PW uses a combination of logic gates to decode the input address and enable signals. When the enable inputs are active, the decoder selects one of the four outputs based on the binary value of the address inputs. The selected output becomes active (logic high), while the remaining outputs remain inactive (logic low).

Detailed Application Field Plans

The SN74AHC139PW is commonly used in various digital systems where decoding or demultiplexing is required. Some specific application fields include:

1. Address decoding in microcontrollers and microprocessors.
2. Memory selection in RAM and ROM modules.
3. Data routing in multiplexed bus systems.
4. Signal demultiplexing in communication systems.
5. Control signal generation in industrial automation.

Detailed and Complete Alternative Models

1. 74HC139: Similar functionality, but operates at a higher voltage range (2 V to 6 V).
2. CD74HC139: Equivalent IC from a different manufacturer (Texas Instruments).
3. MC74HC139: Alternative model with similar specifications and pin configuration (Motorola).

These alternative models can be considered as substitutes for the SN74AHC139PW based on specific requirements and availability.

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