SN74AS245N

Product Overview

Use

It is commonly used as a bidirectional octal bus transceiver.

Characteristics

High-speed, low-power Schottky technology
Wide operating voltage range: 4.5V to 5.5V
Eight bidirectional data lines
Non-inverting outputs
3-state outputs for bus-oriented applications
Flow-through pinout for easy PCB layout
Available in various package options

Package and Quantity

SN74AS245N is available in a 20-pin plastic dual in-line package (PDIP). It is typically sold in quantities of one unit or more.

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: 15ns
Maximum Operating Frequency: 25MHz

Pin Configuration

The detailed pin configuration of SN74AS245N is as follows:

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

Functional Features

Bidirectional data transfer between A and B buses
Non-inverting outputs for easy interfacing with other devices
3-state outputs allow multiple transceivers to share a common bus
Flow-through pinout simplifies PCB layout and routing

Advantages and Disadvantages

Advantages

High-speed operation
Low power consumption
Wide operating voltage range
Easy integration into existing systems
Suitable for bus-oriented applications

Disadvantages

Limited number of bidirectional data lines (8 in this case)
Not suitable for applications requiring a higher number of data lines

Working Principles

SN74AS245N operates by enabling the direction control input (DIR) and output enable input (OE#). When DIR is high, data flows from the A bus to the B bus. Conversely, when DIR is low, data flows from the B bus to the A bus. The OE# input allows the outputs to be disabled, effectively disconnecting the device from the bus.

Detailed Application Field Plans

SN74AS245N finds applications in various fields, including: 1. Microprocessor systems 2. Data communication systems 3. Industrial automation 4. Automotive electronics 5. Consumer electronics

Alternative Models

Some alternative models that can be used as substitutes for SN74AS245N include: 1. SN74LS245N 2. SN74HC245N 3. SN74HCT245N 4. SN74ACT245N

These models offer similar functionality and characteristics, but may differ in terms of speed, power consumption, or voltage compatibility.

In conclusion, SN74AS245N is a versatile bidirectional octal bus transceiver that offers high-speed operation, low power consumption, and wide voltage range. It is commonly used in microprocessor systems, data communication systems, and various other applications.

10 سوال و پاسخ رایج مربوط به کاربرد SN74AS245N در راه حل های فنی را فهرست کنید

Sure! Here are 10 common questions and answers related to the application of SN74AS245N in technical solutions:

Q: What is SN74AS245N? A: SN74AS245N is a type of octal bus transceiver integrated circuit (IC) that can be used for bidirectional data transfer between different voltage levels.
Q: What is the operating voltage range of SN74AS245N? A: SN74AS245N operates within a voltage range of 4.5V to 5.5V.
Q: How many data lines can SN74AS245N handle? A: SN74AS245N can handle 8 data lines, as it is an octal (8-bit) bus transceiver.
Q: Can SN74AS245N be used for level shifting between different voltage domains? A: Yes, SN74AS245N can be used for level shifting between different voltage domains, as it supports bidirectional data transfer.
Q: What is the maximum data transfer rate supported by SN74AS245N? A: SN74AS245N supports a maximum data transfer rate of 24 MHz.
Q: Does SN74AS245N have any built-in protection features? A: No, SN74AS245N does not have built-in protection features. External protection components may be required depending on the application.
Q: Can SN74AS245N be used in both parallel and serial communication systems? A: Yes, SN74AS245N can be used in both parallel and serial communication systems, as it provides bidirectional data transfer.
Q: What is the power supply requirement for SN74AS245N? A: SN74AS245N requires a single power supply voltage of 5V.
Q: Can SN74AS245N be used in high-speed applications? A: Yes, SN74AS245N can be used in high-speed applications as it supports a maximum data transfer rate of 24 MHz.
Q: Are there any specific precautions to consider when using SN74AS245N? A: It is important to ensure that the voltage levels and timing requirements of the connected devices are compatible with SN74AS245N. Additionally, proper decoupling capacitors should be used to minimize noise and stabilize the power supply.