SN74LS298DR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Data Storage and Control
• Characteristics: Quad 2-Input Multiplexer with Storage
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: High-performance digital multiplexer with latch functionality
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 4.75V to 5.25V
• Input Voltage: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 15ns (typical)
• Output Current: ±8mA
• Logic Family: LS (Low Power Schottky)

Detailed Pin Configuration

The SN74LS298DR has a total of 16 pins, which are assigned as follows:

1. A0: Input A0
2. B0: Input B0
3. S0: Select Input S0
4. GND: Ground
5. S1: Select Input S1
6. B1: Input B1
7. A1: Input A1
8. Q0: Output Q0
9. Q1: Output Q1
10. Q2: Output Q2
11. Q3: Output Q3
12. MR: Master Reset Input
13. CLK: Clock Input
14. D: Data Input
15. VCC: Positive Supply Voltage
16. OE: Output Enable Input

Functional Features

The SN74LS298DR is a quad 2-input multiplexer with storage capability. It allows the selection of one out of four data inputs based on the select inputs S0 and S1. The selected data is then stored in the latch until a clock signal is received. The outputs Q0-Q3 represent the stored data and can be enabled or disabled using the output enable input (OE).

Advantages and Disadvantages

Advantages: - High-performance multiplexer with latch functionality - Low power consumption due to LS logic family - Wide operating temperature range - Compact SOIC package for space-saving designs

Disadvantages: - Limited number of inputs (only four) - Propagation delay time may affect timing-sensitive applications

Working Principles

The SN74LS298DR operates by selecting one of the four data inputs (A0, A1, B0, B1) based on the select inputs (S0, S1). The selected data is then latched and stored internally. When a clock signal is received, the stored data is transferred to the outputs (Q0-Q3). The output enable input (OE) allows the outputs to be enabled or disabled as required.

Detailed Application Field Plans

The SN74LS298DR is commonly used in various digital systems where data selection and storage are required. Some application fields include:

1. Data Multiplexing: The IC can be used to select and store data from multiple sources, enabling efficient data routing in microcontrollers, communication systems, and data acquisition devices.
2. Address Decoding: It can be utilized in memory address decoding circuits to select specific memory locations based on input signals.
3. Arithmetic Logic Units (ALUs): The IC can be employed in ALUs to perform logical operations on multiple data inputs.
4. State Machine Design: It finds application in state machines where different states need to be selected and stored based on input conditions.

Detailed and Complete Alternative Models

1. SN74LS157: Quad 2-Input Multiplexer with Common Select Inputs
2. SN74LS257: Quad 2-Input Multiplexer with 3-State Outputs
3. SN74LS151: 8-Input Data Selector/Multiplexer

These alternative models offer similar functionality to the SN74LS298DR and can be considered as alternatives based on specific requirements.

In conclusion, the SN74LS298DR is a high-performance quad 2-input multiplexer with storage capability. It offers advantages such as low power consumption, wide operating temperature range, and compact package size. However, it has limitations in terms of the number of inputs and propagation delay time. The IC finds applications in various digital systems, including data multiplexing, address decoding, ALUs, and state machine designs. Alternative models like SN74LS157, SN74LS257, and SN74LS151 provide similar functionality for different application scenarios.