SCAS294P January   1993  – May 2024 SN54LVC257A , SN74LVC257A

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, SN54LVC257A
    7. 5.7 Switching Characteristics, SN74LVC257A
    8. 5.8 Operating Characteristics
    9. 5.9 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
  9.   Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 8 Device and Documentation Support
    1. 8.1 Documentation Support (Analog)
      1. 8.1.1 Related Documentation
      2. 8.1.2 Related Links
    2. 8.2 Community Resources
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  11. 9 Revision History
  12. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

These quadruple 2-line to 1-line data selectors and multiplexers are designed for 1.65V to 3.6V 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 3.3V or 5V devices. This feature allows the use of these devices as translators in a mixed 3.3V or 5V system
environment.

Device Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2) BODY SIZE(3)
SNx4LVC257A BQB (WQFN, 16) 3.5mm × 2.5mm 3.5mm × 2.5mm
D (SOIC, 16) 9.90 mm × 6mm 9.90 mm × 3.90 mm
DB (SSOP, 16) 6.20 mm × 7.8mm 6.20 mm × 5.30 mm
NS (SOP, 16) 5mm × 6.4mm 5mm × 4.4mm
PW (TSSOP, 16) 5.00 mm × 6.4mm 5.00 mm × 4.40 mm
RGY (VQFN, 16) 4mm × 3.5mm 4mm × 3.5mm
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
(3) The body size (length × width) is a nominal value and does not include pins.
SN54LVC257A SN74LVC257A Logic Diagram (Positive Logic)
Pin numbers shown are for the D, DB, J, NS, PW , RGY , and W packages.
Logic Diagram (Positive Logic)