DM74AS646WM

Basic Information Overview

Category: Integrated Circuit (IC)
Use: Data Bus Transceiver
Characteristics:
- High-speed operation
- Wide voltage range
- Bidirectional data transfer
- Non-inverting outputs
Package: 24-pin wide SOIC (Small Outline Integrated Circuit)
Essence: The DM74AS646WM is a high-performance data bus transceiver IC designed for bidirectional data transfer between two independent buses.
Packaging/Quantity: Available in reels, with 250 units per reel.

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 Propagation Delay: 10ns
Maximum Output Current: ±24mA

Detailed Pin Configuration

The DM74AS646WM has a total of 24 pins, which are assigned as follows:

A1: Bus A Data Input/Output
A2: Bus A Data Input/Output
A3: Bus A Data Input/Output
A4: Bus A Data Input/Output
A5: Bus A Data Input/Output
A6: Bus A Data Input/Output
A7: Bus A Data Input/Output
GND: Ground
B7: Bus B Data Input/Output
B6: Bus B Data Input/Output
B5: Bus B Data Input/Output
B4: Bus B Data Input/Output
B3: Bus B Data Input/Output
B2: Bus B Data Input/Output
B1: Bus B Data Input/Output
OE: Output Enable
DIR: Direction Control
VCC: Supply Voltage
NC: No Connection
NC: No Connection
NC: No Connection
NC: No Connection
NC: No Connection
NC: No Connection

Functional Features

Bidirectional data transfer between two independent buses (A and B)
Non-inverting outputs for both bus A and bus B
High-speed operation allows for efficient data transmission
Wide voltage range ensures compatibility with various systems
Output Enable (OE) pin enables/disables the outputs
Direction Control (DIR) pin determines the direction of data transfer

Advantages and Disadvantages

Advantages: - High-speed operation facilitates fast data transfer - Wide voltage range enhances compatibility - Non-inverting outputs simplify system design

Disadvantages: - Limited number of pins may restrict the number of data lines that can be connected - Requires external control signals for proper operation

Working Principles

The DM74AS646WM operates by receiving data from one bus (A or B) and transmitting it to the other bus bidirectionally. The Direction Control (DIR) pin determines the direction of data transfer, while the Output Enable (OE) pin enables or disables the outputs. The IC ensures high-speed operation and non-inverting outputs for efficient data transmission.

Detailed Application Field Plans

The DM74AS646WM is commonly used in various applications, including: - Data communication systems - Microprocessor-based systems - Networking equipment - Industrial automation - Automotive electronics

Detailed and Complete Alternative Models

Some alternative models to the DM74AS646WM include: - SN74ALS646A - MC74ACT646 - CD74HCT646

These alternative models offer similar functionality and can be used as replacements for the DM74AS646WM in various applications.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací DM74AS646WM v technických řešeních

Sure! Here are 10 common questions and answers related to the application of DM74AS646WM in technical solutions:

Q: What is DM74AS646WM? A: DM74AS646WM is a specific type of integrated circuit (IC) that functions as a bus transceiver with 3-state outputs.
Q: What are the typical applications of DM74AS646WM? A: DM74AS646WM is commonly used in digital systems where bidirectional data transfer between buses is required, such as in microprocessors, memory interfaces, and communication systems.
Q: What is the maximum operating voltage for DM74AS646WM? A: The maximum operating voltage for DM74AS646WM is typically 5 volts.
Q: How many data lines can DM74AS646WM handle? A: DM74AS646WM can handle up to 8 bidirectional data lines.
Q: Does DM74AS646WM support 3-state outputs? A: Yes, DM74AS646WM supports 3-state outputs, allowing multiple devices to share a common bus without interfering with each other.
Q: Can DM74AS646WM be used in both parallel and serial communication systems? A: Yes, DM74AS646WM can be used in both parallel and serial communication systems, depending on the specific application requirements.
Q: What is the maximum data transfer rate supported by DM74AS646WM? A: The maximum data transfer rate of DM74AS646WM depends on various factors, including the system clock frequency and the specific setup of the circuit.
Q: Is DM74AS646WM compatible with other standard logic families? A: Yes, DM74AS646WM is designed to be compatible with other standard logic families, allowing for easy integration into existing digital systems.
Q: Can DM74AS646WM handle both input and output voltage levels? A: Yes, DM74AS646WM is designed to handle both input and output voltage levels, making it suitable for bidirectional data transfer.
Q: Are there any specific precautions to consider when using DM74AS646WM? A: It is important to follow the manufacturer's datasheet and guidelines for proper usage of DM74AS646WM, including considerations for power supply decoupling, signal integrity, and thermal management.

Please note that the answers provided here are general and may vary depending on the specific implementation and requirements of the technical solution.