Encyclopedia Entry: 74F543PC

Product Overview

Category

The 74F543PC belongs to the category of integrated circuits (ICs) and specifically falls under the family of flip-flops.

Use

This product is primarily used in digital electronic systems for storing and transferring binary data. It is commonly employed in applications such as memory units, registers, and data buses.

Characteristics

• The 74F543PC is a D-type transparent latch with tri-state outputs.
• It operates on a wide supply voltage range of 4.5V to 5.5V.
• This IC offers high-speed operation, making it suitable for time-critical applications.
• It features eight latches with separate input and output controls.
• The latch outputs can be put into a high-impedance state using the tri-state outputs.

Package and Quantity

The 74F543PC is available in a standard 20-pin plastic dual in-line package (DIP). Each package contains one unit of the IC.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• 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 Time: 6 ns (typical)

Pin Configuration

The pin configuration of the 74F543PC is as follows:

┌───┐ QA ─┤1 20├ ─ VCC QB ─┤2 19├ ─ GND QC ─┤3 18├ ─ D QD ─┤4 17├ ─ CP QE ─┤5 16├ ─ OE QF ─┤6 15├ ─ LE QG ─┤7 14├ ─ D QH ─┤8 13├ ─ CP GND ─┤9 12├ ─ OE D ─┤10 11├ ─ LE └───┘

Functional Features

• The 74F543PC operates as a transparent latch, allowing data to pass through when the latch enable (LE) input is high.
• It has separate clock inputs (CP) for each latch, enabling individual control over the storage and transfer of data.
• The output enable (OE) input puts the outputs into a high-impedance state when active, allowing multiple devices to share a common bus.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data transfer in time-critical applications.
• Tri-state outputs allow for easy bus sharing and interfacing with other devices.
• Wide supply voltage range provides flexibility in various electronic systems.

Disadvantages

• Limited number of latches (eight in total) may restrict its use in applications requiring a higher number of storage elements.
• Not suitable for low-power applications due to relatively higher power consumption compared to some other ICs.

Working Principles

The 74F543PC functions based on positive-edge-triggered flip-flops. When the latch enable (LE) input is high, the data input (D) is transferred to the corresponding latch output (Q) upon the rising edge of the clock pulse (CP). The output enable (OE) input controls the tri-state outputs, allowing them to be either active or in a high-impedance state.

Application Field Plans

The 74F543PC finds extensive use in various digital electronic systems, including but not limited to: - Memory units and registers in microprocessors and microcontrollers. - Data buses for efficient data transfer between different components of a system. - Address decoding circuits for selecting specific memory locations. - Control units in communication systems and industrial automation.

Alternative Models

Several alternative models with similar functionality are available in the market. Some notable alternatives to the 74F543PC include: - 74HC543: A CMOS version with lower power consumption. - 74LS543: A low-power Schottky TTL version. - 74ACT543: An advanced CMOS version with improved speed and performance.

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

In conclusion, the 74F543PC is a versatile integrated circuit used for storing and transferring binary data in digital electronic systems. Its high-speed operation, tri-state outputs, and wide supply voltage range make it suitable for various applications. However, its limited number of latches and relatively higher power consumption should be taken