SN74BCT640 Octal Bus Transceivers |

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Octal Bus Transceivers

Octal Bus Transceivers - SN74BCT640


The ´BCT640 bus transceiver is designed for asynchronous communication between data buses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction-control (DIR) input. The output-enable () input can be used to disable the device so that the buses are effectively isolated.

The SN54BCT640 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74BCT640 is characterized for operation from 0°C to 70°C.


  • State-of-the-Art BiCMOS Design Substantially Reduces Standby Current
  • Outputs Have Undershoot-Protection Circuitry
  • Power-Up High-Impedance State
  • Buffered Control Inputs to Reduce DC Loading Effects
  • ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015
  • Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK) and Flatpacks (W), and Plastic and Ceramic 300-mil DIPs (J, N)



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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)
SN74BCT640 Order now BCT     4.5     5.5     8     5     70     0.094     6.5     64     -15     Catalog     0 to 70    
SN54BCT640 Samples not available BCT     4.5     5.5     8     5     70     0.094     6.5     64     -15     Military     -55 to 125