74LVC245ATTR

Product Overview

Category: Integrated Circuit (IC)
Use: Level Shifter and Bus Transceiver
Characteristics: High-speed, low-power, bidirectional voltage level translation
Package: TSSOP (Thin Shrink Small Outline Package)
Essence: Transfers data between two different voltage domains
Packaging/Quantity: Available in reels of 2500 pieces

Specifications

Supply Voltage Range: 1.2V to 3.6V
Input Voltage Range: 0V to VCC
Output Voltage Range: 0V to VCC
Maximum Operating Frequency: 400 MHz
Number of Channels: 8
Input/Output Capacitance: 4 pF
Propagation Delay: 3.5 ns (typical)

Detailed Pin Configuration

The 74LVC245ATTR has a total of 20 pins, which are divided into two groups:

Group A (Input/Output Pins)

OE (Output Enable)
DIR (Direction Control)
A1 (Channel A Data Input/Output)
A2 (Channel A Data Input/Output)
A3 (Channel A Data Input/Output)
A4 (Channel A Data Input/Output)
A5 (Channel A Data Input/Output)
A6 (Channel A Data Input/Output)
A7 (Channel A Data Input/Output)
A8 (Channel A Data Input/Output)

Group B (Input/Output Pins)

GND (Ground)
B8 (Channel B Data Input/Output)
B7 (Channel B Data Input/Output)
B6 (Channel B Data Input/Output)
B5 (Channel B Data Input/Output)
B4 (Channel B Data Input/Output)
B3 (Channel B Data Input/Output)
B2 (Channel B Data Input/Output)
B1 (Channel B Data Input/Output)
VCC (Supply Voltage)

Functional Features

Bidirectional voltage level translation between two different voltage domains
Allows interfacing between devices operating at different logic levels
Supports both 3.3V and 5V systems
Provides automatic direction control based on the DIR pin
High-speed operation with minimal propagation delay
Low power consumption, making it suitable for battery-powered applications

Advantages and Disadvantages

Advantages

Enables seamless communication between devices with different voltage levels
Wide supply voltage range allows compatibility with various systems
Fast data transfer with low propagation delay
Compact TSSOP package saves board space
Low power consumption extends battery life in portable devices

Disadvantages

Limited number of channels (8) may not be sufficient for complex systems requiring more connections
Requires careful consideration of voltage compatibility to avoid damage to connected devices

Working Principles

The 74LVC245ATTR is a bidirectional level shifter and bus transceiver. It facilitates communication between two different voltage domains by translating the logic levels of input and output signals. The direction of data flow is controlled by the DIR pin. When DIR is set to high, data is transferred from Channel A to Channel B, and when DIR is low, data flows from Channel B to Channel A.

The IC operates within a wide supply voltage range, allowing compatibility with systems running at different voltages. It features high-speed operation with minimal propagation delay, ensuring efficient data transfer. The low power consumption of the 74LVC245ATTR makes it suitable for use in battery-powered applications.

Detailed Application Field Plans

The 74LVC245ATTR is commonly used in various applications, including:

Microcontroller interfacing with different voltage peripherals
Communication between devices operating at different logic levels
Level shifting in mixed-voltage systems
Bus transceiver for data transfer between different voltage domains
Interface conversion in industrial automation systems

Detailed and Complete Alternative Models

74LVCH245A: Similar functionality with improved noise immunity
74HCT245: Compatible with TTL (Transistor-Transistor Logic) voltage levels
SN74LVC245A: Equivalent alternative from Texas Instruments

These alternative models offer similar features and can be used as replacements for the 74LVC245ATTR based on specific requirements and availability.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací 74LVC245ATTR v technických řešeních

Sure! Here are 10 common questions and answers related to the application of 74LVC245ATTR in technical solutions:

Q: What is the purpose of the 74LVC245ATTR? A: The 74LVC245ATTR is a bidirectional octal bus transceiver used for voltage level translation and signal buffering.
Q: What is the maximum operating voltage for the 74LVC245ATTR? A: The maximum operating voltage for the 74LVC245ATTR is typically 3.6V.
Q: Can the 74LVC245ATTR be used with both CMOS and TTL logic levels? A: Yes, the 74LVC245ATTR is compatible with both CMOS and TTL logic levels.
Q: How many data lines can the 74LVC245ATTR handle? A: The 74LVC245ATTR can handle 8 bidirectional data lines.
Q: What is the maximum data transfer rate supported by the 74LVC245ATTR? A: The 74LVC245ATTR supports a maximum data transfer rate of up to 400 Mbps.
Q: Can the 74LVC245ATTR be used for level shifting between different voltage domains? A: Yes, the 74LVC245ATTR can be used for level shifting between different voltage domains.
Q: Does the 74LVC245ATTR have any built-in protection features? A: Yes, the 74LVC245ATTR has built-in ESD protection on all inputs and outputs.
Q: Can the 74LVC245ATTR be used in high-speed applications? A: Yes, the 74LVC245ATTR is designed for high-speed operation and can be used in high-speed applications.
Q: What is the power supply voltage range for the 74LVC245ATTR? A: The power supply voltage range for the 74LVC245ATTR is typically between 1.65V and 3.6V.
Q: Can the 74LVC245ATTR be used in both parallel and serial communication systems? A: Yes, the 74LVC245ATTR can be used in both parallel and serial communication systems, depending on the application requirements.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's specifications for the 74LVC245ATTR.