SCHS248C November   1998  – April 2025 CD54AC257 , CD54ACT257 , CD74AC257 , CD74ACT257 , CD74ACT258

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Description
  4. 3 Pin Configuration and Functions
  5. 4 Specifications
    1. 4.1 Absolute Maximum Ratings
    2. 4.2 Recommended Operating Conditions
    3. 4.3 Thermal Information
    4. 4.4 Electrical Characteristics
    5. 4.5 Switching Specifications
  6. 5 Parameter Measurement Information
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Power Supply Recommendations
    2. 7.2 Layout
      1. 7.2.1 Layout Guidelines
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support (Analog)
      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
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • BQB|16
  • PW|16
  • N|16
  • D|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Parameter Measurement Information

CD54AC257 CD74AC257 CD54ACT257 CD74ACT257 CD74ACT258 Three-State Propagation Delay Times and Test Circuit Figure 5-1 Three-State Propagation Delay Times and Test Circuit
CD54AC257 CD74AC257 CD54ACT257 CD74ACT257 CD74ACT258 inputs or select to output propagation delays (ac/act257) Figure 5-2 inputs or select to output propagation delays (ac/act257)
CD54AC257 CD74AC257 CD54ACT257 CD74ACT257 CD74ACT258 Select to Output Propagation Delays (CD74ACT258) Figure 5-3 Select to Output Propagation Delays (CD74ACT258)
CD54AC257 CD74AC257 CD54ACT257 CD74ACT257 CD74ACT258 Figure 5-4
For AC Series Only: When VCC = 1.5V, RL = 1kW.
TEST S1
tPLH/tPHL Open
tPLZ/tPZL 2 × VCC
tPHZ/tPZH GND