SN74LS645-1N

Product Overview

Category

The SN74LS645-1N belongs to the category of integrated circuits (ICs).

Use

It is commonly used in digital electronic systems for data bus transceivers.

Characteristics

• The SN74LS645-1N is a bidirectional octal transceiver.
• It operates on a voltage range of 4.75V to 5.25V.
• It has a high-speed performance with a maximum propagation delay of 10ns.
• The device is designed to handle both TTL and CMOS logic levels.
• It offers a wide operating temperature range of -40°C to 85°C.

Package

The SN74LS645-1N is available in a 20-pin DIP (Dual In-line Package) format.

Essence

This IC acts as a buffer, allowing bidirectional data transfer between two separate data buses.

Packaging/Quantity

The SN74LS645-1N is typically packaged in tubes or reels, with quantities varying based on customer requirements.

Specifications

• Supply Voltage: 4.75V to 5.25V
• Operating Temperature Range: -40°C to 85°C
• Logic Family: LS-TTL
• Number of Pins: 20
• Maximum Propagation Delay: 10ns

Detailed Pin Configuration

The pin configuration of the SN74LS645-1N is as follows:

+---\/---+ A0 -|1 20|- VCC A1 -|2 19|- B7 A2 -|3 18|- B6 A3 -|4 17|- B5 A4 -|5 16|- B4 A5 -|6 15|- B3 A6 -|7 14|- B2 A7 -|8 13|- B1 GND -|9 12|- B0 OE -|10 11|- DIR +--------+

Functional Features

• Bidirectional data transfer between two separate data buses.
• TTL and CMOS compatible logic levels.
• High-speed performance with low propagation delay.
• Wide operating temperature range for versatile applications.

Advantages and Disadvantages

Advantages

• Allows efficient bidirectional data transfer.
• Compatible with both TTL and CMOS logic levels.
• Offers high-speed performance.

Disadvantages

• Limited to a specific number of data lines (octal configuration).
• Requires careful consideration of voltage levels and compatibility.

Working Principles

The SN74LS645-1N functions as a bidirectional transceiver by enabling data transfer in both directions. It utilizes control signals, such as the Output Enable (OE) and Direction (DIR) pins, to determine the direction of data flow. When the DIR pin is set to a specific logic level, the data is transferred from one bus to another. The OE pin controls the output enable/disable state of the device.

Detailed Application Field Plans

The SN74LS645-1N finds application in various digital systems where bidirectional data transfer is required. Some common application areas include:

1. Microprocessor-based systems
2. Data communication networks
3. Industrial automation
4. Embedded systems
5. Telecommunications equipment

Detailed and Complete Alternative Models

There are several alternative models available that offer similar functionality to the SN74LS645-1N. Some notable alternatives include:

1. SN74LS245: Octal bus transceiver with tri-state outputs.
2. SN74HCT645: Octal bus transceiver with 3-state outputs.
3. SN74HC645: Octal bus transceiver with 3-state outputs and higher speed performance.

These alternative models provide options for different logic families, output configurations, and performance characteristics, allowing users to choose the most suitable option for their specific requirements.

In conclusion, the SN74LS645-1N is a bidirectional octal transceiver IC used in digital electronic systems. It offers high-speed performance, compatibility with TTL and CMOS logic levels, and efficient data transfer between two separate data buses. With its wide operating temperature range and versatile applications, it serves as a reliable component in various industries.