Encyclopedia Entry: 74AHC259D,118

Product Overview

Category

The 74AHC259D,118 belongs to the category of integrated circuits (ICs) and specifically falls under the family of multiplexers/demultiplexers.

Use

This IC is primarily used for data selection and routing purposes in digital electronic systems. It allows multiple input signals to be selectively routed to a single output line or vice versa.

Characteristics

• High-speed operation
• Low power consumption
• Wide operating voltage range
• Compatibility with both CMOS and TTL logic levels
• Schmitt-trigger action on all inputs
• Balanced propagation delays
• Direct interface with standard types of logic

Package

The 74AHC259D,118 is available in a small-outline package (SOIC) with 16 pins. The package provides protection and easy handling of the integrated circuit.

Essence

The essence of the 74AHC259D,118 lies in its ability to efficiently manage and control data flow within digital systems. By enabling the selection and routing of data signals, it enhances the overall functionality and flexibility of electronic devices.

Packaging/Quantity

The 74AHC259D,118 is typically packaged in reels or tubes, containing a quantity of 2500 units per reel/tube. This ensures convenient storage and distribution for manufacturers and suppliers.

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 +125°C
• Maximum Propagation Delay: 11 ns
• Maximum Quiescent Current: 4 μA

Pin Configuration

The 74AHC259D,118 features 16 pins, each serving a specific function:

1. A0: Address Input 0
2. A1: Address Input 1
3. A2: Address Input 2
4. A3: Address Input 3
5. A4: Address Input 4
6. A5: Address Input 5
7. G2: Enable Input 2
8. G1: Enable Input 1
9. D0: Data Input/Output 0
10. D1: Data Input/Output 1
11. D2: Data Input/Output 2
12. D3: Data Input/Output 3
13. D4: Data Input/Output 4
14. D5: Data Input/Output 5
15. VCC: Positive Power Supply
16. GND: Ground

Functional Features

The key functional features of the 74AHC259D,118 include:

• 8-bit addressable latch with three-state outputs
• Independent control of each latch via enable inputs (G1 and G2)
• Multiplexing capability for data selection and routing
• Compatibility with various logic families
• Schmitt-trigger action for improved noise immunity
• Balanced propagation delays for reliable operation

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data handling.
• Low power consumption contributes to energy efficiency.
• Wide operating voltage range enhances compatibility with different systems.
• Schmitt-trigger action on all inputs improves noise immunity.
• Direct interface with standard logic types simplifies integration.

Disadvantages

• Limited number of address inputs may restrict certain applications.
• Propagation delay of 11 ns may not be suitable for ultra-high-speed applications.
• Availability in only one package type may limit flexibility in certain designs.

Working Principles

The 74AHC259D,118 operates based on the principle of multiplexing and demultiplexing. It uses the address inputs (A0-A5) to select a specific latch, which can then be enabled or disabled using the G1 and G2 inputs. The selected latch's data input/output pins (D0-D5) are connected to the common output line, allowing the desired data to be routed accordingly.

Application Field Plans

The 74AHC259D,118 finds extensive application in various digital systems, including but not limited to:

1. Data routing and selection in microcontrollers and microprocessors.
2. Address decoding in memory systems.
3. Input/output expansion in embedded systems.
4. Multiplexing/demultiplexing in communication devices.
5. Control signal routing in industrial automation.

Alternative Models

For those seeking alternative options, the following integrated circuits can serve similar purposes:

1. SN74LS151: 8-line to 1-line multiplexer
2. CD4051B: 8-channel analog multiplexer/demultiplexer
3. 74HC138: 3-to-8 line decoder/demultiplexer
4. MC14051