SCHS246A August   1998  – August 2024 CD74AC251

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 Characteristics
  6. 5 Parameter Measurement Information
  7. 6 Detailed Description
    1. 6.1 Functional Block Diagram
    2. 6.2 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 Links
    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

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|16
Thermal pad, mechanical data (Package|Pins)

4.5 Switching Characteristics

Input tr, tf = 3ns, CL = 50pF (Worst Case)
SYMBOL PARAMETER VCC (V) -40°C TO 85°C -55°C TO 125°C UNIT
MIN TYP MAX MIN TYP MAX
tPLH, tPHL Propagation delay, data to Y output 1.5 - - 153 - - 169 ns
3.3(1) 4.9 - 17.2 4.7 - 18.9 ns
5(2) 3.5 - 12.3 3.4 - 13.5 ns
tPLH, tPHL Propagation delay, data to Y output 1.5 - - 169 - - 186 ns
3.3 5.4 - 19 5.2 - 20.9 ns
5 3.8 - 13.5 3.7 - 14.9 ns
tPLH, tPHL Propagation delay, select to Y output 1.5 - - 207 - - 228 ns
3.3 6.6 - 23.2 6.4 - 25.5 ns
5 4.7 - 16.5 4.6 - 18.2 ns
tPLH, tPHL Propagation Delay, Select to Y Output 1.5 - - 223 - - 245 ns
3.3 7.1 - 24.9 6.9 - 27.4 ns
5 5.1 - 17.8 4.9 - 19.6 ns
tPZH, tPZL, tPHZ, tPLZ Propagation delay, output enable and output disable to output 1.5 - - 155 - - 169 ns
3.3 5.2 - 18.7 5.1 - 20.3 ns
5 3.5 - 12.3 3.4 - 13.5 ns
CO Three-state output capacitance - - - 15 - - 15 pF
CI Input capacitance - - - 10 - - 10 pF
CPD(3) Power dissipation capacitance - - 120 - - 120 - pF
(1) 3.3V Min is at 3.6V, Max is at 3V.
(2) 5V Min is at 5.5V, Max is at 4.5V.
(3) CPD is used to determine the dynamic power consumption per device.
Note: PD = VCC 2 fi (CPD + CL) where fi = input frequency, CL = output load capacitance, VCC = supply voltage.