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

2.5 Unused Pins

AXC | LXC | TXU devices are equipped with internal pull-downs to prevent floating. Their unused pins can be left disconnected (with the exception of the OE | DIR pins).

Devices not equipped with internal pull-downs can never have unused floating inputs. The recommendation is to tie unused pins to GND.