SCHS245D November   1998  – April 2024 CD54AC245 , CD54ACT245 , CD74AC245 , CD74ACT245

PRODMIX  

  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. 4.6 Timing Diagrams
  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
      2. 7.2.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      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

4.5 Switching Characteristics

Input tr, tf = 3ns, CL = 50pF (Worst Case). Over recommended operating free-air temperature range (unless otherwise noted)
(see Load Circuit and Voltage Waveforms)
PARAMETER VCC (V) -40°C TO 85°C -55°C TO 125°C UNIT
MIN TYP MAX MIN TYP MAX
AC TYPES
tPLH, tPHL Propagation delay, data to output 1.5 96 106 ns
3.3 3.2 10.8 3 11.9
5 2.2 7.7 2.1 8.5
tPLZ, tPHZ Propagation delay, output disable to output 1.5 159 175 ns
3.3 4.7 15.9 4.4 17.5
5 3.7 12.7 3.5 14
tPZL, tPZH Propagation delay, output enable to output 1.5 159 175 ns
3.3 5.6 19 5.3 21
5 3.7 12.7 3.5
VOHV

Minimum (Valley) VOH During switching of other outputs

(output under test not switching)

 5 4 at 25°C 4 at 25°C V
VOLP

Maximum (Peak) VOL During switching of other outputs

(output under test not switching)

 5 1 at 25°C 1 at 25°C V
CO Three-state output capacitance 15 15 pF
CI Input capacitance 10 10 pF
CPD Power dissipation capacitance 57 57 pF
ACT TYPES
tPLH, tPHL Propagation delay, data to output 5 2.7 9.1 2.5 10 ns
tPLZ, tPHZ Propagation delay, output disable to output 5 3.7 12.7 3.5 14 ns
tPZL, tPZH Propagation delay, output enable to output 5 3.8 13.1 3.6 14.4 ns
VOHV

Minimum (Valley) VOH During switching of other outputs

(output under test not switching)

 5 4 at 25°C 4 at 25°C V
VOLP

Maximum (Peak) VOL During switching of other outputs

(output under test not switching)

 5 1 at 25°C 1 at 25°C V
CO Three-state output capacitance 15 15 pF
CI Input capacitance 10 10 pF
CPD Power dissipation capacitance 57 57 pF
  1. Limits tested 100%
  2. 3.3V Min is at 3.6V, Max is at 3V
  3. 5V Min is at 5.5V, Max is at 4.5V
  4. CPD is used to determine the dynamic power consumption per channel
    • AC: PD = VCC2 fi (CPD + CL)
    • ACT: PD = VCC2 fi (CPD + CL) + VCC ∆ ICC where fi = input frequency, CL = output load capacitance, VCC = supply voltage