SN74ALS259DG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Selector/Multiplexer
• Characteristics: High-speed, TTL-compatible, 8-bit multiplexer with 3-state outputs
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: SN74ALS259DG4 is a versatile IC that allows the selection of one out of eight data inputs and routes it to the output based on control signals.
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 9ns (typical)
• Output Current: ±24mA
• Power Dissipation: 500mW (max)

Detailed Pin Configuration

1. A0: Data Input 0
2. A1: Data Input 1
3. A2: Data Input 2
4. A3: Data Input 3
5. A4: Data Input 4
6. A5: Data Input 5
7. A6: Data Input 6
8. A7: Data Input 7
9. G: Enable Input
10. S0: Select Input 0
11. S1: Select Input 1
12. S2: Select Input 2
13. Y: Multiplexed Output
14. VCC: Positive Power Supply
15. GND: Ground

Functional Features

• High-speed operation: The SN74ALS259DG4 offers fast switching times, making it suitable for applications requiring quick data selection.
• TTL compatibility: It is designed to be compatible with TTL logic levels, allowing easy integration into existing systems.
• 3-state outputs: The multiplexer's output can be put in a high-impedance state, enabling multiple devices to share the same bus without interference.

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient data selection. - TTL compatibility ensures seamless integration with existing systems. - 3-state outputs enable bus sharing without interference.

Disadvantages: - Limited to 8-bit data selection, may not be suitable for applications requiring larger data buses. - Requires external control signals for proper operation.

Working Principles

The SN74ALS259DG4 is a data selector/multiplexer IC that routes one of the eight input lines to the output based on the select inputs (S0, S1, S2) and the enable input (G). When the enable input is low, the output remains in a high-impedance state. The selected input is then transmitted to the output when the enable input is high.

Detailed Application Field Plans

• Data routing in microcontrollers and microprocessors
• Address decoding in memory systems
• Input selection in digital audio/video equipment
• Bus sharing in multi-device communication systems

Detailed and Complete Alternative Models

1. CD74HC257E: Quad 2-input multiplexer with 3-state outputs
2. MC74HC151N: 8-input multiplexer with 3-state outputs
3. SN74LS157N: Quad 2-line to 1-line data selectors/multiplexers

These alternative models offer similar functionality and can be used as substitutes for the SN74ALS259DG4 depending on specific requirements.

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