SN74LV245ADWE4

Product Overview

• Category: Integrated Circuit
• Use: Level Shifter/Transceiver
• Characteristics: Low-voltage, Octal Bus Transceiver with 3-State Outputs
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: This IC is designed to shift the voltage levels of signals in digital systems, allowing communication between devices operating at different voltage levels.
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• High-Level Input Voltage: 2V to VCC + 0.5V
• Low-Level Input Voltage: -0.5V to 0.8V
• High-Level Output Voltage: 2.4V (min) at IOH = -4mA
• Low-Level Output Voltage: 0.4V (max) at IOL = 8mA
• Operating Temperature Range: -40°C to 85°C
• Number of Channels: 8
• Input/Output Type: Non-Inverting
• Logic Family: LV (Low-Voltage)

Detailed Pin Configuration

The SN74LV245ADWE4 has a total of 20 pins. The pin configuration is as follows:

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

Functional Features

• Bidirectional Data Transfer: The SN74LV245ADWE4 allows data to be transferred bidirectionally between two buses with different voltage levels.
• 3-State Outputs: The outputs can be put into a high-impedance state, allowing multiple devices to share the same bus without interfering with each other.
• Output Enable Control: The OE pin enables or disables the outputs, providing control over when data is transmitted.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - Non-inverting inputs/outputs simplify interfacing with other logic families. - 3-state outputs enable bus sharing and reduce conflicts.

Disadvantages: - Limited number of channels (8) may not be sufficient for complex systems requiring more connections. - Operating temperature range (-40°C to 85°C) may not be suitable for extreme environments.

Working Principles

The SN74LV245ADWE4 operates by using a combination of level shifting and tri-state output control. When the DIR pin is set to a specific logic level, the IC determines the direction of data flow. The inputs are then shifted to match the voltage levels of the target bus, allowing bidirectional communication. The OE pin controls the output enable/disable function, ensuring data is transmitted only when necessary.

Detailed Application Field Plans

The SN74LV245ADWE4 is commonly used in various digital systems where voltage level shifting is required. Some application fields include:

1. Microcontroller Interfacing: The IC enables communication between microcontrollers operating at different voltage levels, facilitating data exchange.
2. Sensor Networks: It allows sensors with different voltage requirements to interface with a central processing unit, enabling data collection and analysis.
3. Industrial Automation: The IC can be used in control systems to connect devices operating at different voltage levels, such as PLCs (Programmable Logic Controllers) and actuators.
4. Communication Interfaces: It is utilized in communication protocols like I2C or SPI to enable compatibility between devices with varying voltage levels.

Detailed and Complete Alternative Models

1. SN74LVC245A: Similar to SN74LV245ADWE4 but operates at a lower voltage range (1.65V to 3.6V).
2. SN74HCT245: A higher-voltage alternative (4.5V to 5.5V) suitable for applications requiring higher voltage levels.