SCHS167G November   1998  – October 2022 CD54HC240 , CD54HC244 , CD54HCT240 , CD54HCT241 , CD54HCT244 , CD74HC240 , CD74HC241 , CD74HC244 , CD74HCT240 , CD74HCT241 , CD74HCT244

PRODUCTION DATA  

  1. 1 Features
  2. 2 Description
  3. 3 Revision History
  4. 4 Pin Configuration and Functions
  5. 5 Specifications
    1. 5.1 Absolute Maximum Ratings (1)
    2. 5.2 Recommended Operating Conditions
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics '240
    5. 5.5 Electrical Characteristics '241
    6. 5.6 Electrical Characteristics '244
    7. 5.7 Switching Characteristics '240
    8. 5.8 Switching Characteristics '241
    9. 5.9 Switching Characteristics '244
  6. 6 Parameter Measurement Information
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
  8. 8 Power Supply Recommendations
  9. 9 Layout
    1. 9.1 Layout Guidelines
  10. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 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|20
  • DW|20
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5.9 Switching Characteristics '244

CL = 50 pF, Input tr, tf = 6 ns
PARAMETER VCC (V) 25℃ –40℃ to 85℃ –55℃ to 125℃ UNIT
MIN TYP MAX MIN TYP MAX MIN TYP MAX
HC TYPES
tPLH, tPHL

Propagation delay

Data to outputs		 2 110 140 165 ns
4.5 9(3) 22 28 33
6 19 24 28
tTHL, tTLH Output enable and disable time 2 150 190 225 ns
4.5 30 38 45
5 12
6 26 33 38
tTLH, tTHL Output transition time 2 60 75 90 ns
4.5 12 15 18
6 10 13 15
CI Input capacitance 10 10 10 10 pF
CO Three-state output capacitance 20 20 20 pF
CPD Power dissipation capacitance(1)(2) 5 46(3) pF
HCT TYPES
tPHL, tPLH Data to outputs 4.5 10(3) 25 31 38 ns
tTLH, tTHL Output enable and disable times 4.5 30 38 45 ns
tTHL, tTLH Output transition time 4.5 12 15 18 ns
CI Input capacitance 10 10 10 10 pF
CPD Power dissipation capacitance(1)(2) 5 40 pF
(1) CPD is used to determine the dynamic power consumption, per channel.
(2) PD = VCC2fi (CPD + CL) where fi = input frequency, fO = output frequency, CL = output load capacitance, VCC = supply voltage.
(3) CL = 15 pF and VCC = 5 V.