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CD74FCT245

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具有三态输出的 BiCMOS FCT 接口逻辑八路同向总线收发器

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CD74FCT245

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产品详情

Number of channels 8 IOL (max) (mA) 64 IOH (max) (mA) -15 Input type TTL Output type TTL Features Very high speed (tpd 5-10ns) Technology family FCT Rating Catalog Operating temperature range (°C) 0 to 70
Number of channels 8 IOL (max) (mA) 64 IOH (max) (mA) -15 Input type TTL Output type TTL Features Very high speed (tpd 5-10ns) Technology family FCT Rating Catalog Operating temperature range (°C) 0 to 70
SOIC (DW) 20 131.84 mm² (12.8 mm × 10.3 mm) PDIP (N) 20 228.702 mm² (24.33 mm × 9.4 mm)
  • 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
  • Package Options Include Plastic Small-Outline (M) and Shrink Small-Outline (SM) Packages and Standard Plastic (E) DIP
  • 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
  • Package Options Include Plastic Small-Outline (M) and Shrink Small-Outline (SM) Packages and Standard Plastic (E) DIP

The CD74FCT245 is an octal bus transceiver 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.

The CD74FCT245 allows data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon the logic level at the direction-control (DIR) input. The output-enable (OE\) input can be used to disable the device so that the buses are effectively isolated.

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.

The CD74FCT245 is characterized for operation from 0°C to 70°C.

The CD74FCT245 is an octal bus transceiver 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.

The CD74FCT245 allows data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon the logic level at the direction-control (DIR) input. The output-enable (OE\) input can be used to disable the device so that the buses are effectively isolated.

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.

The CD74FCT245 is characterized for operation from 0°C to 70°C.

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* 数据表 BiCMOS Octal Bus Transceiver With 3-State Outputs 数据表 2000-7-2

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