SCES584B JUNE   2005  – November 2014 SN74LVC8T245

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Logic Diagram (Positive Logic)
  5. Revision History
  6. Description (continued)
  7. Pin Configuration and Functions
  8. Specifications
    1. 8.1  Absolute Maximum Ratings
    2. 8.2  Handling Ratings
    3. 8.3  Recommended Operating Conditions
    4. 8.4  Thermal Information DB, DBQ and DGV
    5. 8.5  Thermal Information PW and RHL
    6. 8.6  Electrical Characteristics
    7. 8.7  Switching Characteristics, VCCA = 1.8 V ± 0.15 V
    8. 8.8  Switching Characteristics, VCCA = 2.5 V ± 0.2 V
    9. 8.9  Switching Characteristics, VCCA = 3.3 V ± 0.3 V
    10. 8.10 Switching Characteristics, VCCA = 5 V ± 0.5 V
    11. 8.11 Operating Characteristics
    12. 8.12 Typical Characteristics
  9. Parameter Measurement Information
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.65-V to 5.5-V Power-Supply Range
      2. 10.3.2 Ioff Supports Partial-Power-Down Mode Operation
    4. 10.4 Device Functional Modes
  11. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
      3. 11.2.3 Application Curve
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
  14. 14Device and Documentation Support
    1. 14.1 Trademarks
    2. 14.2 Electrostatic Discharge Caution
    3. 14.3 Glossary
  15. 15Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DGV|24
  • DBQ|24
  • RHL|24
  • NS|24
  • DB|24
  • DW|24
  • PW|24
Thermal pad, mechanical data (Package|Pins)
Orderable Information

11 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

11.1 Application Information

The SN74LVC8T245 device can be used in level-translation applications for interfacing devices or systems operating at different interface voltages with one another. The maximum output current can be up to 32 mA when device is powered by 5 V.

11.2 Typical Application

typ_application_sces584.gifFigure 5. Typical Application Circuit

11.2.1 Design Requirements

For this design example, use the parameters listed in Table 2.

Table 2. Design Parameters

PARAMETERS VALUES
Input voltage range 1.65 V to 5.5 V
Output voltage 1.65 V to 5.5 V

11.2.2 Detailed Design Procedure

To begin the design process, determine the following:

  • Input voltage range
    • Use the supply voltage of the device that is driving the SN74LVC8T245 device to determine the input voltage range. For a valid logic high, the value must exceed the VIH of the input port. For a valid logic low, the value must be less than the VIL of the input port.
  • Output voltage range
    • Use the supply voltage of the device that the SN74LVC8T245 device is driving to determine the output voltage range.

11.2.3 Application Curve

G003_sces584.gif
Figure 6. Translation Up (1.8 V to 5 V) at 2.5 MHz