DM74ALS258N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Multiplexer
• Characteristics: High-speed, TTL compatible, 3-state outputs
• Package: DIP (Dual In-line Package)
• Essence: A logic multiplexer that selects one of eight data inputs based on the control inputs
• Packaging/Quantity: Available in tubes or reels, quantity varies depending on supplier

Specifications

• Supply Voltage: 4.75V to 5.25V
• Input Voltage: 0V to Vcc
• Output Voltage: 0V to Vcc
• Operating Temperature: -40°C to +85°C
• Propagation Delay: 9ns (typical)
• Output Current: ±24mA
• Logic Family: Advanced Low-Power Schottky (ALS)

Detailed Pin Configuration

The DM74ALS258N has a total of 16 pins, which are assigned as follows:

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. Y: Output
11. B: Output Enable
12. C: Control Input
13. D: Control Input
14. Vcc: Positive Power Supply
15. GND: Ground
16. NC: No Connection

Functional Features

• Selects one of eight data inputs based on the control inputs
• High-speed operation suitable for demanding applications
• TTL compatible inputs and outputs
• 3-state outputs allow multiple devices to share a common bus

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data selection
• TTL compatibility allows easy integration with existing systems
• 3-state outputs facilitate bus sharing in complex circuits

Disadvantages

• Limited to selecting one of eight data inputs, may not be suitable for applications requiring more inputs
• Requires external control signals for proper operation

Working Principles

The DM74ALS258N is a logic multiplexer that operates based on the control inputs. The A0-A7 pins are used to input eight different data signals, while the C and D pins control the selection of the desired input. When the control inputs are set accordingly, the selected data input is passed through to the output pin (Y). The B pin is used to enable or disable the output.

Detailed Application Field Plans

The DM74ALS258N can be used in various applications where data selection is required. Some potential application fields include:

1. Data routing and switching systems
2. Multiplexing audio or video signals
3. Address decoding in memory systems
4. Control signal selection in industrial automation
5. Input selection in communication systems

Detailed and Complete Alternative Models

1. SN74ALS258N: Similar functionality, but from a different manufacturer (Texas Instruments)
2. CD74ALS258M: Surface mount version of the DM74ALS258N
3. MC74ALS258N: Another alternative from a different manufacturer (Motorola)

These alternative models offer similar features and can be considered as replacements for the DM74ALS258N depending on availability and specific requirements.

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