74AHC138BQ,115

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoding and demultiplexing
• Characteristics: High-speed operation, low power consumption
• Package: 16-pin SOIC (Small Outline Integrated Circuit)
• Essence: A 3-to-8 line decoder/demultiplexer
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Supply voltage range: 2.0V to 5.5V
• High noise immunity: VNIH = VNIL = 30% VCC (min)
• Low power consumption: ICC = 4µA (max) at TA = 25°C
• Output current: ±6mA
• Operating temperature range: -40°C to +125°C

Detailed Pin Configuration

1. GND: Ground
2. A0: Address input 0
3. A1: Address input 1
4. A2: Address input 2
5. E1: Enable input 1
6. E2: Enable input 2
7. E3: Enable input 3
8. Y0: Output 0
9. Y1: Output 1
10. Y2: Output 2
11. Y3: Output 3
12. Y4: Output 4
13. Y5: Output 5
14. Y6: Output 6
15. Y7: Output 7
16. VCC: Positive supply voltage

Functional Features

The 74AHC138BQ,115 is a high-speed CMOS decoder/demultiplexer IC. It takes three address inputs (A0, A1, A2) and three enable inputs (E1, E2, E3) to generate eight mutually exclusive outputs (Y0-Y7). The selected output is determined by the combination of address inputs and enable inputs. It operates at a wide supply voltage range and offers high noise immunity.

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient decoding and demultiplexing. - Low power consumption makes it suitable for battery-powered devices. - Wide operating temperature range enables usage in various environments. - Compact 16-pin SOIC package provides ease of integration.

Disadvantages: - Limited to 3-to-8 line decoding/demultiplexing functionality. - May require additional components for complex applications.

Working Principles

The 74AHC138BQ,115 uses a combination of address inputs and enable inputs to select one of the eight outputs. When the enable inputs are active (low), the decoder/demultiplexer decodes the binary address inputs and activates the corresponding output. The selected output remains active until the enable inputs or address inputs change.

Detailed Application Field Plans

The 74AHC138BQ,115 finds applications in various fields, including:

1. Address decoding in microcontrollers and microprocessors.
2. Memory selection in digital systems.
3. Data routing in communication systems.
4. Signal demultiplexing in audio/video equipment.
5. Control signal generation in industrial automation.

Detailed and Complete Alternative Models

1. 74HC138: Similar functionality with slightly different electrical characteristics.
2. CD74HC138: Equivalent IC from a different manufacturer.
3. SN74LS138: TTL logic family alternative with different voltage requirements.

(Note: This list is not exhaustive and other alternatives may exist.)

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