SCHS248B November   1998  – August 2024 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)
  • D|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • ’AC257, ’ACT257…………. non-inverting outputs
  • CD74ACT258 ………………. inverting outputs
  • Buffered inputs
  • Typical propagation delay
    • 4.4ns at V CC = 5V, T A = 25°C, C L = 50pF
  • Exceeds 2kV ESD protection MIL-STD-883, method 3015
  • SCR-latchup-resistant CMOS process and circuit design
  • Speed of bipolar FAST™/AS/S with significantly reduced power consumption
  • Balanced Propagation Delays
  • AC types feature 1.5V to 5.5V operation and balanced noise immunity at 30% of the supply
  • ±24mA output drive current
    • Fanout to 15 FAST™ ICs
  • Drives 50Ω transmission lines