SPRADM1 October   2024 2N7001T , CD4009UB , CD40109B , CD4010B , CD4010B-Q1 , CD4504B , CD4504B-EP , SN54SC4T125-SEP , SN54SC6T06-SEP , SN54SC6T07-SEP , SN54SC6T14-SEP , SN54SC6T17-SEP , SN54SC8T541-SEP , SN54SLC8T245-SEP , SN74ALVC164245 , SN74ALVC164245-EP , SN74AUP1T04 , SN74AUP1T14 , SN74AUP1T17 , SN74AUP1T34 , SN74AUP1T34-Q1 , SN74AUP1T50 , SN74AVC16T245 , SN74AVC16T245-Q1 , SN74AVC1T45 , SN74AVC20T245 , SN74AVC24T245 , SN74AVC2T244 , SN74AVC2T245 , SN74AVC2T45 , SN74AVC2T45-Q1 , SN74AVC32T245 , SN74AVC4T234 , SN74AVC4T245 , SN74AVC4T245-Q1 , SN74AVC4T774 , SN74AVC6T622 , SN74AVC8T245 , SN74AVC8T245-Q1 , SN74AVCA164245 , SN74AVCA406 , SN74AVCAH164245 , SN74AVCB164245 , SN74AVCB164245-EP , SN74AVCB164245-Q1 , SN74AVCBH164245 , SN74AVCH16T245 , SN74AVCH1T45 , SN74AVCH20T245 , SN74AVCH24T245 , SN74AVCH2T45 , SN74AVCH4T245 , SN74AVCH4T245-EP , SN74AVCH4T245-Q1 , SN74AVCH8T245 , SN74AXC1T45 , SN74AXC1T45-Q1 , SN74AXC2T245 , SN74AXC2T245-Q1 , SN74AXC2T45 , SN74AXC2T45-Q1 , SN74AXC4T245 , SN74AXC4T245-Q1 , SN74AXC4T774 , SN74AXC4T774-Q1 , SN74AXC8T245 , SN74AXC8T245-Q1 , SN74AXCH1T45 , SN74AXCH2T45 , SN74AXCH4T245 , SN74AXCH8T245 , SN74LV1T04 , SN74LV1T04-Q1 , SN74LV1T125 , SN74LV1T125-Q1 , SN74LV1T126 , SN74LV1T126-Q1 , SN74LV1T34 , SN74LV1T34-Q1 , SN74LV4T125 , SN74LV4T125-EP , SN74LV4T125-Q1 , SN74LV6T06 , SN74LV6T06-EP , SN74LV6T07-EP , SN74LV6T14 , SN74LV6T14-EP , SN74LV6T14-Q1 , SN74LV6T17 , SN74LV6T17-EP , SN74LV6T17-Q1 , SN74LVC16T245 , SN74LVC16T245-EP , SN74LVC1T45 , SN74LVC1T45-EP , SN74LVC1T45-Q1 , SN74LVC2T45 , SN74LVC2T45-EP , SN74LVC2T45-Q1 , SN74LVC4245A , SN74LVC4245A-EP , SN74LVC8T245 , SN74LVC8T245-EP , SN74LVC8T245-Q1 , SN74LVCC3245A , SN74LVCC3245A-EP , SN74LVCC4245A , SN74LVCC4245A-EP , SN74LVCE161284 , SN74LVCH16T245 , SN74LVCH16T245-EP , SN74LVCH8T245 , SN74LXC1T14 , SN74LXC1T14-Q1 , SN74LXC1T45 , SN74LXC1T45-Q1 , SN74LXC2T45 , SN74LXC2T45-Q1 , SN74LXC8T245 , SN74LXC8T245-Q1 , SN74LXCH1T45 , SN74LXCH8T245 , TXH0137D-Q1 , TXU0101 , TXU0101-Q1 , TXU0102 , TXU0102-Q1 , TXU0202 , TXU0202-Q1 , TXU0304 , TXU0304-Q1 , TXV0106 , TXV0106-Q1 , TXV0108 , TXV0108-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Device Applicability
    2. 1.2 When to Use or Not Use Fixed Directional Devices
  5. 2Recommendations Specific to Fixed Directional or Direction Control Level Shifters
    1. 2.1 Before You Begin
      1. 2.1.1 Documentation
    2. 2.2 Power Supplies
      1. 2.2.1 Biasing Requirements
      2. 2.2.2 Decoupling Capacitors
      3. 2.2.3 Power Sequencing
    3. 2.3 Output Enable and DIR Pins
    4. 2.4 Input or Output Pins
    5. 2.5 Unused Pins
    6. 2.6 Pull-Ups and Pull-Downs
    7. 2.7 Recommended Translator by Interface
  6. 3Summary
  7. 4References

2.6 Pull-Ups and Pull-Downs

  • External pull-up (or pull-down) resistors can be used with devices that do not have internal pull-downs (or pull-ups).
  • If a device includes internal pull-downs (or pull-ups), external pull-ups (or pull-downs) can be sized properly avoid voltage divider networks.
    • The general rule is to size external pull-ups no larger than 10% of the value of the internal pull-down resistor used. See respective data sheet recommendations for AXC | LXC | TXU.