SN54LS243 Quadruple Bus Transceivers |

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Quadruple Bus Transceivers

Quadruple Bus Transceivers - SN54LS243


These four-data-line transceivers are designed for asynchronous two-way communications between data buses. SN74LS243 can be used to drive terminated lines down to 133 .

SN54LS243 is characterized for operation over the full military temperature range of –55°C to 125°C. SN74LS243 is characterized for operation from 0°C to 70°C.


  • Two-Way Asynchronous Communication Between Data Buses
  • PNP Inputs Reduce D-C Loading
  • Hysteresis (Typically 400 mV) at Inputs Improves Noise Margin


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Part number Order Technology Family VCC (Min) (V) VCC (Max) (V) Bits (#) Voltage (Nom) (V) F @ nom voltage (Max) (MHz) ICC @ nom voltage (Max) (mA) tpd @ nom Voltage (Max) (ns) IOL (Max) (mA) IOH (Max) (mA) Rating Operating temperature range (C)
SN54LS243 Order now LS     4.5     5.5     4     5     35     0.05     18     24     -15     Military     -55 to 125    
SN74LS243 Samples not available LS     4.75     5.25     4     5     35     0.05     18     24     -15     Catalog     0 to 70