SCLS303E January   1996  – September 2022 SN54HC640 , SN74HC640

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
    2. 5.2 Recommended Operating Conditions (1)
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Switching Characteristics
    6. 5.6 Operating Characteristics
  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)
  • NS|20
  • N|20
  • DW|20
  • PW|20
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5.5 Switching Characteristics

CL = 50 pF. See Figure 6
PARAMETER FROM (INPUT) TO (OUTPUT) VCC (V) TA = 25°C SN54HC640 SN75HC640
MIN TYP MAX MIN MAX MIN MAX
tpd Propagation delay A or B Y 2 29 105 160 130 ns
4.5 10 21 32 26
6 8 18 27 22
ten Enable time OE A or B 2 109 230 340 290 ns
4.5 27 46 68 58
6 20 39 58 49
tdis Disable time OE A or B 2 40 150 225 190 ns
4.5 18 30 45 38
6 16 26 38 32
tt Transition time A or B 2 20 60 90 75 ns
4.5 8 12 18 15
6 6 10 15 13
CL = 150 pF. See Figure 6
PARAMETER FROM (INPUT) TO (OUTPUT) VCC (V) TA = 25°C SN54HC640 SN75HC640
MIN TYP MAX MIN MAX MIN MAX
tpd Propagation delay A or B B or A 2 44 190 290 235 ns
4.5 14 38 58 47
6 11 33 49 41
ten Enable time OE A or B 2 124 315 470 395 ns
4.5 31 63 94 79
6 23 54 80 68
tt Transition time A or B 2 45 210 315 265 ns
4.5 17 42 63 53
6 13 36 53 45