SCES517K December   2003  – November 2023 SN74AVC8T245

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Electrical Characteristics
    6. 5.6  Switching Characteristics, VCCA = 1.2 V
    7. 5.7  Switching Characteristics, VCCA = 1.5 V ± 0.1 V
    8. 5.8  Switching Characteristics, VCCA = 1.8 V ± 0.15 V
    9. 5.9  Switching Characteristics, VCCA = 2.5 V ± 0.2 V
    10. 5.10 Switching Characteristics, VCCA = 3.3 V ± 0.3 V
    11. 5.11 Operating Characteristics
    12. 5.12 Typical Total Static Power Consumption (ICCA + ICCB)
    13. 5.13 Typical Characteristics
  7.   Parameter Measurement Information
  8. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Fully Configurable Dual-Rail Design
      2. 6.3.2 Support High-Speed Translation
      3. 6.3.3 Ioff Supports Partial-Power-Down Mode Operation
      4. 6.3.4 Balanced High-Drive CMOS Push-Pull Outputs
      5. 6.3.5 Vcc Isolation
    4. 6.4 Device Functional Modes
  9. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
      3. 7.2.3 Application Curve
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  10. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  11. 9 Revision History
  12. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

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

7.3 Power Supply Recommendations

The SN74AVC8T245 device uses two separate configurable power-supply rails, VCCA and VCCB. VCCA accepts any supply voltage from 1.2 V to 3.6 V and VCCB accepts any supply voltage from 1.2 V to 3.6 V. The A port and B port are designed to track VCCA and VCCB, respectively, allowing for low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V and 3.3-V voltage nodes. The recommendation is to first power-up the input supply rail to help avoid internal floating while the output supply rail ramps up. However, both power-supply rails can be ramped up simultaneously.

The output-enable OE input circuit is designed so that it is supplied by VCCA and when the OE input is high, all outputs are placed in the high-impedance state. To ensure the high-impedance state of the outputs during power up or power down, the OE input pin must be tied to VCCA through a pullup resistor and must not be enabled until VCCA and VCCB are fully ramped and stable. The minimum value of the pullup resistor to VCCA is determined by the current-sinking capability of the driver.