SCLS420H June   1998  – January 2025 SN54AHCT123A , SN74AHCT123A

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 ESD Ratings
    3. 4.3 Recommended Operating Conditions
    4. 4.4 Thermal Information
    5. 4.5 Electrical Characteristics
    6. 4.6 Timing Requirements
    7. 4.7 Switching Characteristics
    8. 4.8 Operating Characteristics
    9. 4.9 Input/Output Timing Diagram
  6. 5 Parameter Measurement Information
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 CMOS Schmitt-Trigger Inputs
      2. 6.3.2 TTL-Compatible CMOS Inputs
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Caution in Use
      2. 7.1.2 Power-down Considerations
      3. 7.1.3 Output Pulse Duration
      4. 7.1.4 Retriggering Data
    2. 7.2 Power Supply Recommendations
    3. 7.3 Layout
      1. 7.3.1 Layout Guidelines
      2. 7.3.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      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

4.5 Electrical Characteristics

over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS VCC TA = 25 °C SN54AHCT123A SN74AHCT123A UNIT
MIN TYP MAX MIN MAX MIN MAX
VOH IOH = -50 μA 4.5 V 4.4 4.5 4.4 4.4 V
IOH = -8 mA 3.94 3.8 3.8
VOL IOL = 50 μA 4.5 V 0.1 0.1 0.1 V
IOL = 8 mA 0.36 0.5 0.44
II Rext/Cext (2) VI = VCC or GND 5.5 V ±0.25 ±2.5 ±2.5 μA
A, B, and CLR VI = VCC or GND 0 V to 5.5 V ±0.1 ±1(1) ±1
ICC Quiescent VI = VCC or GND, IO = 0 5.5 V 4 40 40 μA
ICC Active state (per circuit) VI = VCC or GND, Rext/Cext = 0.5 VCC 5.5 V 560 750 975 975 μA
ΔICC (3) One input at 3.4 V, Other inputs at VCC or GND 5.5 V 1.35 1.5 1.5 mA
Ci VI = VCC or GND 5 V 1.9 10 10 pF
(1) On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.
(2) This test is performed with the terminal in the off-state condition.
(3) This is the increase in supply current for each input at one of the specified TTL voltage levels rather than 0 V or VCC.