Encyclopedia Entry: 74AC11257DBR

Product Information Overview

• Category: Integrated Circuit (IC)
• Use: Digital Logic Multiplexer
• Characteristics: High-speed, low-power consumption, wide operating voltage range
• Package: DBR (Dual-In-Line Package with Rail)
• Essence: The 74AC11257DBR is a multiplexer IC that allows the selection of one out of eight data inputs to be routed to a single output.
• Packaging/Quantity: Available in reels, each containing 2500 units.

Specifications

• Logic Family: 74AC
• Number of Inputs: 8
• Number of Outputs: 1
• Operating Voltage Range: 2V to 6V
• Propagation Delay: 5ns (typical)
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOIC (Small Outline Integrated Circuit)

Detailed Pin Configuration

The 74AC11257DBR has a total of 16 pins arranged as follows:

┌───┐ A0 ─┤1 16├─ VCC A1 ─┤2 15├─ B A2 ─┤3 14├─ A A3 ─┤4 13├─ Y A4 ─┤5 12├─ GND A5 ─┤6 11├─ OE A6 ─┤7 10├─ S0 A7 ─┤8 9├─ S1 └───┘

Functional Features

• The 74AC11257DBR is a multiplexer with eight data inputs (A0-A7) and one output (Y).
• The selection of the input to be routed to the output is controlled by two select inputs (S0 and S1).
• The output can be enabled or disabled using the output enable input (OE).
• It operates at high speed, making it suitable for applications requiring fast switching.
• The low-power consumption of this IC makes it energy-efficient.
• The wide operating voltage range allows compatibility with various digital systems.

Advantages and Disadvantages

Advantages: - High-speed operation - Low-power consumption - Wide operating voltage range - Compact package size - Easy integration into digital circuits

Disadvantages: - Limited number of inputs and outputs - Requires external control signals for proper functioning

Working Principles

The 74AC11257DBR functions as a multiplexer by selecting one of the eight data inputs based on the values of the select inputs (S0 and S1). The selected input is then routed to the output pin (Y). The output can be enabled or disabled using the output enable input (OE).

Detailed Application Field Plans

The 74AC11257DBR is commonly used in various digital systems and applications, including:

1. Data routing and selection in microcontrollers and microprocessors.
2. Address decoding in memory systems.
3. Input/output expansion in digital interfaces.
4. Signal multiplexing in communication systems.
5. Control signal selection in industrial automation.

Detailed and Complete Alternative Models

Some alternative models that serve similar functions to the 74AC11257DBR include:

1. 74HC151: 8-input multiplexer with similar characteristics but operates at a lower voltage range.
2. CD4051: Analog multiplexer/demultiplexer with 8 channels.
3. 74LS157: Quad 2-input multiplexer with separate output enable control.

These alternative models can be considered based on specific requirements and compatibility with the target system.

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