SN74LVC4245ADWR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Level Shifter and Bus Transceiver
• Characteristics:
  • Bidirectional voltage translation between different logic levels
  • Supports both 3.3V and 5V systems
  • Eight bidirectional I/O ports
  • Automatic direction control
  • Low power consumption
• Package: SOIC-20 Wide (Small Outline Integrated Circuit)
• Essence: The SN74LVC4245ADWR is a versatile voltage level shifter and bus transceiver IC that allows seamless communication between devices operating at different logic levels.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• High-Level Input Voltage: 2.3V to VCC + 0.5V
• Low-Level Input Voltage: -0.5V to 0.8V
• High-Level Output Voltage: 2.4V (minimum) at IOH = -12mA
• Low-Level Output Voltage: 0.4V (maximum) at IOL = 24mA
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The SN74LVC4245ADWR has a total of 20 pins, which are assigned as follows:

1. OE (Output Enable) - Active low output enable pin
2. A1 - Bidirectional data I/O port A1
3. B1 - Bidirectional data I/O port B1
4. A2 - Bidirectional data I/O port A2
5. B2 - Bidirectional data I/O port B2
6. GND - Ground pin
7. B3 - Bidirectional data I/O port B3
8. A3 - Bidirectional data I/O port A3
9. B4 - Bidirectional data I/O port B4
10. A4 - Bidirectional data I/O port A4
11. VCCB - Supply voltage for ports B1 to B4
12. DIR (Direction Control) - Direction control pin
13. B5 - Bidirectional data I/O port B5
14. A5 - Bidirectional data I/O port A5
15. B6 - Bidirectional data I/O port B6
16. A6 - Bidirectional data I/O port A6
17. GND - Ground pin
18. A7 - Bidirectional data I/O port A7
19. B7 - Bidirectional data I/O port B7
20. VCCA - Supply voltage for ports A1 to A7

Functional Features

• Bidirectional voltage translation: Allows seamless communication between devices operating at different logic levels.
• Automatic direction control: Simplifies the interface design by automatically controlling the direction of data flow.
• Wide supply voltage range: Supports both 3.3V and 5V systems, providing flexibility in various applications.
• Low power consumption: Helps conserve energy in battery-powered devices.

Advantages and Disadvantages

Advantages: - Enables easy integration of devices with different logic levels. - Simplifies interface design by eliminating the need for additional level shifting components. - Wide supply voltage range allows compatibility with various systems. - Low power consumption helps extend battery life in portable devices.

Disadvantages: - May introduce slight signal degradation due to voltage level translation. - Limited number of bidirectional I/O ports may restrict its use in complex systems requiring a higher number of connections.

Working Principles

The SN74LVC4245ADWR operates based on the principles of voltage level shifting and bidirectional data transmission. It uses a combination of MOSFETs and control logic to translate signals between different voltage levels while ensuring proper direction control.

When the OE pin is low, the device is enabled, and the DIR pin determines the direction of data flow. When DIR is high, data flows from ports A to B, and when DIR is low, data flows from ports B to A. The automatic direction control feature simplifies the interface design by eliminating the need for manual direction control.

Detailed Application Field Plans

The SN74LVC4245ADWR finds applications in various fields where voltage level shifting and bidirectional data communication are required. Some potential application areas include:

1. Microcontroller interfacing: Allows communication between microcontrollers operating at different logic levels.
2. Sensor networks: Facilitates data exchange between sensors with varying voltage requirements.
3. Industrial automation: Enables seamless integration of devices with different logic levels in industrial control systems.
4. IoT devices: Supports communication between IoT devices operating at different voltage levels.
5. Consumer electronics: Used in devices such as smartphones, tablets, and gaming consoles to enable compatibility between different components.

Detailed