Encyclopedia Entry: 74LVCH245AQ20-13

Product Overview

Category

The 74LVCH245AQ20-13 belongs to the category of integrated circuits (ICs) and specifically falls under the family of bus transceivers.

Use

This IC is primarily used for bidirectional level shifting and voltage translation between different logic levels in digital systems. It enables seamless communication between devices operating at different voltage levels.

Characteristics

• Bidirectional voltage translation
• Supports voltage levels from 1.2V to 3.6V
• High-speed operation with a maximum propagation delay of 5.8 ns
• Low power consumption
• ESD protection on all inputs and outputs
• Wide operating temperature range (-40°C to +85°C)

Package

The 74LVCH245AQ20-13 is available in a 20-pin TSSOP (Thin Shrink Small Outline Package) package. This package offers a compact form factor, making it suitable for space-constrained applications.

Essence

The essence of the 74LVCH245AQ20-13 lies in its ability to facilitate seamless data transfer between devices operating at different voltage levels, ensuring compatibility and reliable communication within digital systems.

Packaging/Quantity

The IC is typically supplied in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 1.2V to 3.6V
• Input Voltage Levels:
  • Low Level (Logic 0): 0V to 0.8V
  • High Level (Logic 1): 2V to VCC
• Output Voltage Levels:
  • Low Level (Logic 0): 0V to 0.4V
  • High Level (Logic 1): 2.4V to VCC
• Maximum Propagation Delay: 5.8 ns
• Maximum Operating Frequency: 200 MHz

Detailed Pin Configuration

The 74LVCH245AQ20-13 has a total of 20 pins, which are assigned specific functions as follows:

1. OE (Output Enable)
2. A1 (Data Input/Output)
3. B1 (Data Input/Output)
4. A2 (Data Input/Output)
5. B2 (Data Input/Output)
6. A3 (Data Input/Output)
7. B3 (Data Input/Output)
8. A4 (Data Input/Output)
9. B4 (Data Input/Output)
10. GND (Ground)
11. B5 (Data Input/Output)
12. A5 (Data Input/Output)
13. B6 (Data Input/Output)
14. A6 (Data Input/Output)
15. B7 (Data Input/Output)
16. A7 (Data Input/Output)
17. B8 (Data Input/Output)
18. A8 (Data Input/Output)
19. VCC (Supply Voltage)
20. DIR (Direction Control)

Functional Features

• Bidirectional data transfer between two voltage domains
• Automatic direction control based on the DIR pin
• High-speed operation for efficient data transmission
• ESD protection on all inputs and outputs for enhanced reliability
• Low power consumption for energy-efficient applications

Advantages and Disadvantages

Advantages

• Enables seamless communication between devices operating at different voltage levels
• Wide operating temperature range allows for use in various environments
• Compact package size suitable for space-constrained applications
• ESD protection ensures robustness and reliability

Disadvantages

• Limited to voltage translation within the specified range (1.2V to 3.6V)
• May not be suitable for applications requiring voltage translation beyond the supported range

Working Principles

The 74LVCH245AQ20-13 utilizes a combination of MOSFETs and logic gates to achieve bidirectional voltage translation. The direction of data flow is controlled by the DIR pin, which determines whether the IC operates in transmit or receive mode. When enabled, the IC translates the input signals from one voltage level to another, allowing seamless communication between devices with different logic levels.

Detailed Application Field Plans

The 74LVCH245AQ20-13 finds applications in various digital systems where voltage translation is required. Some potential application fields include:

1. Microcontroller interfacing
2. Memory modules
3. Communication interfaces (UART, SPI, I2C)
4. Sensor networks
5. Industrial automation systems

Detailed and Complete Alternative Models

1. SN74LVC245A: Similar bidirectional bus transceiver IC from Texas Instruments.
2. MC74VHC245: Voltage level translator IC from ON Semiconductor.
3. CD74HCT245: Octal bus transceiver IC from Texas Instruments.

These alternative models offer similar functionality and can be considered as alternatives