SCAS584O November   1996  – May 2026 SN74LVCC4245A

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
    7. 5.7 Operating Characteristics
    8. 5.8 Typical Characteristics
  7. 6 Parameter Measurement Information For A to B VCCA = 4.5V to 5.5V and VCCB = 2.7V to 3.6V
  8. 7 Parameter Measurement Information For A to B VCCA = 4.5V to 5.5V and VCCB = 3.6V to 5.5V
  9. 8 Parameter Measurement Information For B to A VCCA = 4.5V to 5.5V and VCCB = 2.7V to 3.6V
  10. 9 Parameter Measurement Information For B to A VCCA = 4.5V to 5.5V and VCCB = 3.6V to 5.5V
  11. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Glitch-free Power Supply Sequencing
      2. 10.3.2 VCC Isolation and VCC Disconnect
    4. 10.4 Device Functional Modes
  12. 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 Curves
    3. 11.3 Power Supply Recommendations
    4. 11.4 Layout
      1. 11.4.1 Layout Guidelines
      2. 11.4.2 Layout Example
  13. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  14. 13Revision History
  15. 14Mechanical, Packaging, and Orderable Information

3 Description

This 8-bit (octal) noninverting bus transceiver uses two separate power-supply rails. The A port, VCCA, is dedicated to accepting a 5V supply level, and the configurable B port, which is designed to track VCCB, accepts voltages from 3V to 5V. This allows for translation from a 3.3V to a 5V environment and vice versa.

The SN74LVCC4245A device is designed for asynchronous communication between data buses. The SN74LVCC4245A device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses effectively are isolated. The control circuitry (DIR, OE) is powered by VCCA.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The VCC isolation feature is designed so that if either VCCA or VCCB is less than 100mV, both I/O ports enter a high-impedance state by disabling their outputs.

Package Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2)
SN74LVCC4245A DB (SSOP, 24) 8.2mm × 7.8mm
DW (SOIC, 24) 15.5mm × 10.3mm
NS (SOP, 24) 15mm × 7.8mm
PW (TSSOP, 24) 9.7mm × 6.4mm
(1) For more information, see Section 14
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
SN74LVCC4245A Logic Diagram (Positive Logic) Logic Diagram (Positive Logic)