SCDS003P November   1992  – December  2015 SN74CBT3383

 

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Bidirectional Data Flow With Near-Zero Propagation Delay
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Related Links
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

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

8 Detailed Description

8.1 Overview

The SNX4CBT3383 provides ten high-speed CMOS TTL-compatible bus switches. The low ON-resistance of the SNX4CBT3383 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The Bus Enable (BE) signal turns the switches on. The Bus Exchange (BX) signal provides nibble swap of the 1A and 1B pairs of signals. This exchange configuration allows byte swapping of buses in systems. It can also be used as a 5-wide, 2-to-1 multiplexer, to create low delay barrel shifters, and so forth.

8.2 Functional Block Diagram

SN74CBT3383 SN54CBT3383 SCDS003logicdiag.gif

8.3 Feature Description

8.3.1 Bidirectional Data Flow With Near-Zero Propagation Delay

The SN74CBT3383 features a low propagation delay or tpd that works great for multiple rail information transfer from 1A1to 1B1 and 1A2 to 1B2 for example. However, the SNX4CBT3383 also features BUS exchange functionality, which allows for bidirectional data transfers from the inputs and outputs connected on the B side. By enabling the BX pin, the outputs are now crossed, or exchanged, and data can now flow from 1A1 to 1B2 and 1A2 to 1B1 with little to no propagation delay. This can be used to enable byte swapping of buses within a system or to create a 5-wide, 2-to-1 multiplexer.

8.4 Device Functional Modes

Table 1 lists the functional modes of the SNx4CBT3383.

Table 1. Function Table

INPUTS INPUTS / OUTPUT
BE BX 1A1-5A1 1A2-5A2
L L 1B1-5B1 1B2-5B2
L H 1B2-5B2 1B1-5B1
H X Z Z