SN74BCT25642 Octal 25 Ohm Bus Transceivers With Open Collector Outputs |

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Octal 25 Ohm Bus Transceivers With Open Collector Outputs

Octal 25 Ohm Bus Transceivers With Open Collector Outputs - SN74BCT25642


This 25-octal bus transceiver is designed for asynchronous communication between data buses. The device transmits 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 the buses are effectively isolated.

The SN74BCT25642 is capable of sinking 188-mA IOL (A port), which facilitates switching 25- transmission lines on the incident wave. It is designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented transceivers. The distributed VCC and GND pins minimize the noise generated by the simultaneous switching of the outputs.

The SN74BCT25642 is characterized for operation from 0°C to 70°C.


  • State-of-the-Art BiCMOS Design Significantly Reduces ICCZ
  • ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
  • Designed to Facilitate Incident-Wave Switching for Line Impedances of 25-or Greater
  • Distributed VCC and GND Pins Minimize Noise Generated by the Simultaneous Switching of Outputs
  • The A Port Features Open-Collector Outputs That Provide 188-mA IOL to Allow for Heavy DC Loading on Open-Collector Outputs
  • Eliminates Need for 3-State Overlap Protection on A Ports
  • Package Options Include Plastic Small-Outline (DW) Packages and Standard Plastic 300-mil DIPs (NT)



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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)
SN74BCT25642 Order now BCT     4.5     5.5     8     5     70     0.125     6.3     188     0     Catalog     0 to 70