CD74FCT244AT BiCMOS FCT Interface Logic Octal Non-Inverting Buffers/Line Drivers with 3-State Outputs | TI.com

CD74FCT244AT
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BiCMOS FCT Interface Logic Octal Non-Inverting Buffers/Line Drivers with 3-State Outputs

 

Description

The CD74FCT244 and CD74FCT244AT are octal buffer/line drivers with 3-state outputs using a small-geometry BiCMOS technology. The output stages are a combination of bipolar and CMOS transistors that limit the output high level to two diode drops below VCC. This resultant lowering of output swing (0 V to 3.7 V) reduces the power-bus ringing [a source of electromagnetic interference (EMI)] and minimizes VCC bounce and ground bounce and their effects during simultaneous output switching. The output configuration also enhances switching speed and is capable of sinking 64 mA.

These devices are organized as two 4-bit buffers/line drivers with separate active-low output-enable (OE\) inputs. When OE\ is low, the device passes data from the A inputs to the Y outputs. When OE\ is high, the outputs are in the high-impedance state.

To ensure the high-impedance state during power up or power down, OE\ should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Features

  • BiCMOS Technology With Low Quiescent Power
  • Buffered Inputs
  • Noninverted Outputs
  • Input/Output Isolation From VCC
  • Controlled Output Edge Rates
  • 64-mA Output Sink Current
  • Output Voltage Swing Limited to 3.7 V
  • SCR Latch-Up-Resistant BiCMOS Process and Circuit Design

Parametrics

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Part number Order Technology Family VCC (Min) (V) VCC (Max) (V) Channels (#) IOL (Max) (mA) IOH (Max) (mA) ICC (uA) Input type Output type Features Data rate (Mbps) Rating Package Group
CD74FCT244AT Order now FCT     4.75     5.25     8     64     -15     80     TTL-Compatible CMOS     3-State     Very high speed (tpd 5-10ns)
Over-voltage tolerant inputs    
140     Catalog     PDIP | 20
SOIC | 20