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Octal Bus Transceivers with 3-State Outputs and Series Damping Resistors


Package | PIN: SOIC (DW) | 20
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $0.62
10-24 $0.55
25-99 $0.51
100-249 $0.44
250-499 $0.40
500-749 $0.33
750-999 $0.26
1000+ $0.24


  • Function and Pinout Compatible With FCT and F Logic
  • 25- Output Series Resistors to Reduce Transmission-Line Reflection Noise
  • Edge-Rate Control Circuitry for Significantly Improved Noise Characteristics
  • Ioff Supports Partial-Power-Down Mode Operation
  • Fully Compatible With TTL Input and Output Logic Levels
  • ESD Protection Exceeds JESD 22
    • 2000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)
  • 12-mA Output Sink Current
    15-mA Output Source Current
  • 3-State Outputs

Texas Instruments  CY74FCT2245TSOCT

The CY74FCT2245T contains eight noninverting, bidirectional buffers with 3-state outputs intended for bus-oriented applications. On-chip termination resistors at the outputs reduce system noise caused by reflections. For this reason, the CY74FCT2245T can replace the CY74FCT245T in an existing design. The CY74FCT2245T current-sinking capability is 12 mA at the A and B ports.

The transmit/receive (T/R) input determines the direction of data flow through the bidirectional transceiver. Transmit (active high) enables data from A ports to B ports; receive (active low) enables data from B ports to A ports. The output-enable (OE\) input, when high, disables both the A and B ports by putting them in the high-impedance state.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.