SN74HC245DWE4

Product Overview

Category

SN74HC245DWE4 belongs to the category of integrated circuits (ICs).

Use

It is commonly used as a bidirectional octal bus transceiver.

Characteristics

• High-speed CMOS technology
• 8-bit wide bidirectional data transfer
• Non-inverting outputs
• 3-state outputs for bus-oriented applications
• Low power consumption
• Wide operating voltage range: 2V to 6V
• Schmitt-trigger inputs for noise immunity
• ESD protection exceeds JESD 22

Package and Quantity

SN74HC245DWE4 is available in a surface mount package. The package type is SOIC (Small Outline Integrated Circuit) with a width of 7.5mm. It comes in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Input Capacitance: 3.5pF
• Output Capacitance: 6pF
• Propagation Delay Time: 9ns (max)
• Output Current: ±6mA

Pin Configuration

The SN74HC245DWE4 has a total of 20 pins. The pin configuration is as follows:

__ __ A1 |1 U 20| VCC A2 |2 19| B1 A3 |3 18| B2 A4 |4 17| B3 A5 |5 16| B4 A6 |6 15| B5 A7 |7 14| B6 A8 |8 13| B7 GND |9 12| B8 OE |10 11| DIR ‾‾ ‾‾

Functional Features

• Bidirectional data transfer: SN74HC245DWE4 allows data to be transferred bidirectionally between two buses.
• Non-inverting outputs: The outputs of the transceiver are non-inverting, ensuring that the received data is not inverted.
• 3-state outputs: The device has 3-state outputs, which can be used for bus-oriented applications where multiple devices share a common bus.

Advantages and Disadvantages

Advantages

• High-speed CMOS technology enables fast data transfer.
• Wide operating voltage range allows compatibility with various systems.
• Schmitt-trigger inputs provide noise immunity.
• ESD protection exceeds industry standards, ensuring robustness.

Disadvantages

• Limited output current may restrict its use in certain high-current applications.
• Propagation delay time of 9ns (max) may affect timing-sensitive applications.

Working Principles

SN74HC245DWE4 operates as a bidirectional octal bus transceiver. It allows data to be transferred bidirectionally between two buses. The direction of data flow is controlled by the DIR pin. When DIR is low, data flows from the A bus to the B bus, and when DIR is high, data flows from the B bus to the A bus. The OE (Output Enable) pin is used to enable or disable the outputs.

Detailed Application Field Plans

SN74HC245DWE4 finds applications in various fields, including: 1. Microcontroller interfacing 2. Data communication systems 3. Industrial automation 4. Automotive electronics 5. Consumer electronics 6. Telecommunications

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to SN74HC245DWE4 are: 1. 74HCT245: Similar functionality, but with TTL (Transistor-Transistor Logic) technology. 2. CD74HC245E: Equivalent functionality, but in a different package (PDIP - Plastic Dual In-line Package).

These alternative models provide similar features and can be used as replacements based on specific requirements.

In conclusion, SN74HC245DWE4 is a high-speed CMOS bidirectional octal bus transceiver. It offers non-inverting outputs, 3-state outputs, and wide operating voltage range. While it has advantages such as noise immunity and ESD protection, it also has limitations in terms of output current and propagation delay time. It finds applications in various fields and has alternative models available for specific needs.