SCAS294O JANUARY   1993  – June 2015 SN54LVC257A , SN74LVC257A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Options
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information: 16-Pin Packages
    5. 7.5  Thermal Information: 20-Pin Package
    6. 7.6  Electrical Characteristics
    7. 7.7  SN54LVC257A Switching Characteristics
    8. 7.8  SN74LVC257A Switching Characteristics
    9. 7.9  Operating Characteristics
    10. 7.10 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Related Documentation
    2. 13.2 Related Links
    3. 13.3 Community Resources
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

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机械数据 (封装 | 引脚)
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订购信息

1 Features

  • Operate From 1.65 V to 3.6 V
  • Inputs Accept Voltages to 5.5 V
  • Maximum tpd of 4.6 ns at 3.3 V
  • Typical VOLP (Output Ground Bounce)
    <0.8 V at VCC = 3.3 V, TA = 25°C
  • Typical VOHV (Output VOH Undershoot)
    >2 V at VCC = 3.3 V, TA = 25°C
  • Latch-Up Performance Exceeds 250 mA Per JESD 17
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
  • On Products Compliant to MIL-PRF-38535, All Parameters Are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters.

2 Applications

  • Cable Modem Termination Systems
  • Tests and Measurements
  • I/O Expanders
  • Motor Drivers
  • Network Switches
  • Servers
  • Telecom Infrastructure

3 Description

These quadruple 2-line to 1-line data selectors and multiplexers are designed for 1.65-V to 3.6-V VCC
operation.

The SNx4LVC257A devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at a high logic level.

Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators in a mixed 3.3-V or 5-V system
environment.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
SN74LVC257A VQFN (16) 3.50 mm × 4.00 mm
SOIC (16) 9.90 mm × 3.91 mm
SO (16) 10.30 mm × 5.30 mm
SSOP (16) 5.50 mm × 6.20 mm
TSSOP (16) 4.40 mm × 5.00 mm
SN54LVC257A CDIP (16) 6.92 mm × 21.34 mm
CFP (16) 10.30 mm × 6.73 mm
LCCC (20) 8.89 mm × 8.89 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Logic Diagram (Positive Logic)

SN54LVC257A SN74LVC257A LD_CAS294.gif
Pin numbers shown are for the D, DB, J, NS, PW , RGY , and W packages.