74LV251N,112

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Multiplexer
• Characteristics: Low-voltage CMOS device, 3-state outputs, wide operating voltage range
• Package: DIP-16 (Dual In-line Package with 16 pins)
• Essence: Logic multiplexer with 3-state outputs
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Input Voltage Range: -0.5V to VCC + 0.5V
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +125°C
• Propagation Delay Time: 6 ns (typical)
• Maximum Quiescent Current: 2 μA at 5.5V
• Maximum Output Current: ±24 mA

Pin Configuration

The 74LV251N,112 IC has a total of 16 pins arranged as follows:

+---+--+---+ A0 --|1 +--+ 16|-- VCC A1 --|2 15|-- Y A2 --|3 14|-- B A3 --|4 13|-- C G1 --|5 74LV 12|-- GND G2 --|6 251N 11|-- S0 Y0 --|7 10|-- S1 Y1 --|8 9|-- Y2 +----------+

Functional Features

• Logic multiplexer with 3-state outputs
• Selects one of the four data inputs (B, C, Y0, Y1) based on the select inputs (S0, S1)
• Output (Y) can be disabled using the enable input (G1, G2)

Advantages and Disadvantages

Advantages: - Wide operating voltage range allows compatibility with various systems - Low quiescent current minimizes power consumption - 3-state outputs provide flexibility in connecting multiple devices

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

Working Principles

The 74LV251N,112 is a logic multiplexer that selects one of the four data inputs based on the select inputs. The output is determined by the combination of select inputs as follows:

• S0 = 0, S1 = 0: Y = B
• S0 = 0, S1 = 1: Y = C
• S0 = 1, S1 = 0: Y = Y0
• S0 = 1, S1 = 1: Y = Y1

The enable inputs (G1, G2) control the output state. When both G1 and G2 are high, the output is in the high-impedance state (disconnected).

Detailed Application Field Plans

The 74LV251N,112 IC finds applications in various digital systems where data selection and routing are required. Some potential application fields include:

1. Data Multiplexing: Used to select and route data from multiple sources to a single destination.
2. Address Decoding: Enables the selection of specific memory locations or peripheral devices based on address inputs.
3. Bus Switching: Facilitates the connection of multiple devices to a common bus, allowing data transfer between them.

Alternative Models

Some alternative models that offer similar functionality to the 74LV251N,112 IC are:

1. 74HC251: High-speed CMOS logic multiplexer with 3-state outputs.
2. CD4051: Analog multiplexer/demultiplexer with 8 channels and 3-state outputs.
3. SN74LS151: TTL logic multiplexer with 3-state outputs.

These alternative models can be considered based on specific requirements such as speed, voltage range, or package type.

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