Encyclopedia Entry: 74AC153SC

Product Overview

Category

The 74AC153SC belongs to the category of integrated circuits (ICs) and specifically falls under the family of digital multiplexers.

Use

This IC is primarily used for data selection and routing in digital systems. It allows multiple input signals to be selectively routed to a single output based on control inputs.

Characteristics

• High-speed operation: The 74AC153SC is designed to operate at high clock frequencies, making it suitable for time-critical applications.
• Low power consumption: This IC is optimized for low power consumption, ensuring efficient energy usage in electronic devices.
• Wide operating voltage range: It can operate within a wide voltage range, typically between 2V and 6V.
• Compatibility: The 74AC153SC is compatible with both TTL (Transistor-Transistor Logic) and CMOS (Complementary Metal-Oxide-Semiconductor) logic levels.

Package and Quantity

The 74AC153SC is available in a standard 16-pin small outline integrated circuit (SOIC) package. It is commonly sold in reels or tubes containing multiple units, with quantities varying depending on the supplier.

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to Vcc
• Output Voltage Range: 0V to Vcc
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 100 MHz
• Propagation Delay: 5 ns (typical)

Pin Configuration

The 74AC153SC has 16 pins arranged as follows:

+---+--+---+ A1 --|1 +--+ 16|-- Vcc B1 --|2 15|-- B2 C1 --|3 14|-- C2 D1 --|4 13|-- D2 GND --|5 12|-- GND SEL --|6 11|-- Y A0 --|7 10|-- B3 B0 --|8 9|-- C3 +----------+

Functional Features

The 74AC153SC is a dual 4-input multiplexer with common select inputs (SEL). It allows the selection of one of the four data inputs (A, B, C, or D) to be routed to the output (Y) based on the control inputs (A0 and B0). The select input (SEL) determines whether the first or second set of inputs (A1-D1 or A2-D2) is active.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data routing in time-critical applications.
• Low power consumption ensures energy efficiency in electronic devices.
• Wide operating voltage range provides flexibility in various voltage environments.
• Compatibility with TTL and CMOS logic levels allows for easy integration into existing systems.

Disadvantages

• Limited number of input channels (four) may restrict its use in applications requiring more inputs.
• Propagation delay of 5 ns (typical) may introduce slight latency in certain scenarios.

Working Principles

The 74AC153SC operates based on the principles of digital multiplexing. When the select input (SEL) is low, the first set of inputs (A1-D1) is selected, and when SEL is high, the second set of inputs (A2-D2) is chosen. The control inputs (A0 and B0) determine which input from the selected set is routed to the output (Y).

Application Field Plans

The 74AC153SC finds applications in various digital systems, including but not limited to: - Data routing and selection in microcontrollers and microprocessors. - Address decoding in memory systems. - Input signal selection in communication devices. - Multiplexing control in data acquisition systems.

Alternative Models

Several alternative models with similar functionality to the 74AC153SC include: - 74HC153: A CMOS version of the IC with comparable characteristics. - CD74AC153: Another variant from a different manufacturer offering similar features. - SN54AC153: A TTL-compatible version suitable for integration into legacy systems.

These alternative models can be considered based on specific requirements and availability.

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