DM74AS257MX

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Multiplexer
• Characteristics: High-speed, low-power consumption
• Package: 16-pin SOIC (Small Outline Integrated Circuit)
• Essence: Combines multiple input signals into a single output signal
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Logic Family: AS (Advanced Schottky)
• Number of Inputs: 4
• Number of Outputs: 1
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -55°C to +125°C
• Propagation Delay: 9ns (typical)
• Power Dissipation: 22mW (typical)

Pin Configuration

The DM74AS257MX has a total of 16 pins arranged as follows:

+---+--+---+ A1 --|1 +--+ 16|-- VCC B1 --|2 |-- Y C1 --|3 |-- B D1 --|4 |-- A GND --|5 |-- C A2 --|6 |-- D B2 --|7 |-- G C2 --|8 |-- D2 D2 --|9 |-- C2 G2 --|10 |-- B2 Y -- |11 |-- A2 B -- |12 |-- D1 A -- |13 |-- C1 C -- |14 |-- B1 D -- |15 |-- A1 +----------+

Functional Features

The DM74AS257MX is a data multiplexer IC that combines four input signals (A, B, C, D) into a single output signal (Y). It operates on a supply voltage range of 4.5V to 5.5V and offers high-speed performance with low power consumption. The propagation delay is typically 9ns, making it suitable for time-critical applications.

Advantages and Disadvantages

Advantages: - High-speed operation - Low power consumption - Wide operating temperature range - Compact 16-pin SOIC package

Disadvantages: - Limited number of inputs and outputs - Not suitable for applications requiring more complex data manipulation

Working Principles

The DM74AS257MX utilizes advanced Schottky transistor technology to achieve high-speed data multiplexing. It selects one of the four input signals based on the control inputs (A1, A2) and routes it to the output pin (Y). The internal circuitry ensures minimal propagation delay and accurate signal transmission.

Detailed Application Field Plans

The DM74AS257MX finds applications in various fields where data multiplexing is required. Some specific application areas include:

1. Communication Systems: Used for signal routing and switching in telecommunication networks.
2. Data Acquisition: Enables the selection and combination of multiple sensor inputs for data collection systems.
3. Industrial Automation: Facilitates the integration of multiple control signals in industrial automation processes.
4. Test and Measurement: Allows the selection and routing of test signals in electronic testing equipment.
5. Audio/Video Switching: Used in audio/video systems to switch between different input sources.

Detailed and Complete Alternative Models

1. SN74LS257: Similar data multiplexer IC with TTL logic family and 16-pin DIP package.
2. CD4051B: Analog multiplexer/demultiplexer IC with 8 channels and 16-pin SOIC package.
3. MC14051B: CMOS analog multiplexer/demultiplexer IC with 8 channels and 16-pin SOIC package.

These alternative models offer similar functionality but may have different specifications and pin configurations.

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