Encyclopedia Entry: 74F253PC

Product Overview

Category

The 74F253PC belongs to the category of integrated circuits (ICs) commonly known as multiplexers.

Use

This IC is primarily used for data selection and routing purposes in digital electronic systems.

Characteristics

• The 74F253PC is a dual 4-input multiplexer with tri-state outputs.
• It operates on a supply voltage range of 4.5V to 5.5V.
• This IC is designed to work with standard TTL logic levels.
• It offers high-speed operation, making it suitable for applications requiring rapid data switching.

Package

The 74F253PC is available in a 16-pin plastic dual in-line package (PDIP).

Essence

The essence of the 74F253PC lies in its ability to select one of four input data lines and route it to the output based on control signals.

Packaging/Quantity

The 74F253PC is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage High (VIH): 2.0V (min), 7.0V (max)
• Input Voltage Low (VIL): -0.5V (min), 0.8V (max)
• Output Voltage High (VOH): 2.4V (min), VCC (max)
• Output Voltage Low (VOL): 0.4V (max), 0.5V (max)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74F253PC has a total of 16 pins, each serving a specific purpose. Here is the detailed pin configuration:

1. A0: Input A0
2. B0: Input B0
3. C0: Input C0
4. D0: Input D0
5. GND: Ground
6. Y0: Output Y0
7. Y1: Output Y1
8. E1: Enable Input 1
9. E2: Enable Input 2
10. VCC: Supply Voltage
11. D1: Input D1
12. C1: Input C1
13. B1: Input B1
14. A1: Input A1
15. Y2: Output Y2
16. Y3: Output Y3

Functional Features

• Dual 4-input multiplexer with tri-state outputs.
• Can select one of four input data lines based on control inputs.
• Tri-state outputs allow for high impedance state when not enabled.
• High-speed operation suitable for time-critical applications.

Advantages and Disadvantages

Advantages

• Versatile multiplexing capability for data routing.
• Tri-state outputs enable bus sharing and reduce contention.
• High-speed operation enhances system performance.

Disadvantages

• Limited to 4-input selection, may not be suitable for larger-scale applications.
• Requires external control signals for proper operation.

Working Principles

The 74F253PC operates by using the control inputs (E1 and E2) to select one of the four input data lines (A0-A1, B0-B1, C0-C1, D0-D1) and route it to the corresponding output lines (Y0-Y3). When the enable inputs are active, the selected input is passed through to the outputs. When the enable inputs are inactive, the outputs enter a high impedance state.

Detailed Application Field Plans

The 74F253PC finds application in various digital electronic systems, including but not limited to: - Data multiplexing in microprocessors and microcontrollers. - Address decoding in memory systems. - Input/output (I/O) expansion in embedded systems. - Bus switching and routing in communication systems.

Detailed and Complete Alternative Models

There are several alternative models available that offer similar functionality to the 74F253PC. Some notable alternatives include: - 74HC253: A CMOS version of the dual 4-input multiplexer. - CD4052: A CMOS analog multiplexer/demultiplexer with similar pin configuration. - SN54/74LS153: A TTL dual 4-line to 1-line data selector/multiplexer.

These alternative models can be considered based on specific application requirements and compatibility with the existing system.

---

Word count: 570 words