SCHS147J November   1998  – November 2021 CD54HC138 , CD54HC238 , CD54HCT138 , CD54HCT238 , CD74HC138 , CD74HC238 , CD74HCT138 , CD74HCT238

PRODUCTION DATA  

  1. 1 Features
  2. 2 Description
  3. 3 Revision History
  4. 4 Pin Configuration and Functions
    1.     5
  5. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Recommended Operating Conditions
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Switching Characteristics (2)
  6. 6 Parameter Measurement Information
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Device Functional Modes
  8. 8 Power Supply Recommendations
  9. 9 Layout
    1. 9.1 Layout Guidelines
  10. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

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

5.5 Switching Characteristics(2)

Input tt = 6ns. (See Parameter Measurement Information)
PARAMETER TEST CONDITIONS VCC (V) 25°C -40°C to 85°C -55°C to 125°C UNIT
MIN TYP MAX MIN MAX MIN MAX
HC TYPES
tpd Address to output CL = 50pF 2 150 190 225 ns
4.5 13(3) 30 38 45
CL = 50pF 6 26 33 38
Strobe G0, G1, G2 to output HC/HCT 138 CL = 50pF 2 150 190 265 ns
4.5 30 38 53
6 26 33 45
tt Output transition time CL = 50pF 2 75 95 110 MHz
4.5 15 19 22
6 13 16 19
Cpd Power dissipation capacitance(1) CL = 15pF 5 67 pF
Ci Input capacitance 10 10 10 pF
HCT TYPES
tpd Address to output CL = 50pF 4.5 14(3) 35 44 53 ns
Strobe G2 to output HC/HCT138 CL = 50pF 4.5 35 44 53 ns
Strobe G0, G1 to output HC/HCT238 CL = 15pF 4.5 40 50 60 ns
tt Output transition time CL= 15pF 4.5 15 19 22
Cpd Power dissipation capacitance(1) CL = 15pF 5 67 pF
Ci Input capacitance 10 10 10 pF
(1) CPD is used to determine the dynamic power consumption, per gate.
(2) For details on power calculation, see SCAA035B
(3) CL = 15pF and VCC = 5