CD74FCT244

Name: CD74FCT244
Brand: TI
SKU: CD74FCT244
Price: 0.623 USD

現行

具有 TTL 相容 CMOS 輸入和 3 態輸出的 8 通道、4.75-V 至 5.25-V 緩衝器

立即訂購

產品規格表

document-pdfAcrobat BiCMOS Octal Buffers/Line Drivers With 3-State Outputs datasheet (Rev. B) (英文)

CD74FCT244

現行

產品規格表

立即訂購

產品詳細資料

Technology family

FCT

Supply voltage (min) (V)

4.75

Supply voltage (max) (V)

5.25

Number of channels

8

IOL (max) (mA)

64

Supply current (max) (µA)

80

IOH (max) (mA)

-15

Input type

TTL-Compatible CMOS

Output type

3-State

Features

Over-voltage tolerant inputs, Very high speed (tpd 5-10ns)

Rating

Catalog

Operating temperature range (°C)

0 to 70

Technology family

FCT

Supply voltage (min) (V)

4.75

Supply voltage (max) (V)

5.25

Number of channels

8

IOL (max) (mA)

64

Supply current (max) (µA)

80

IOH (max) (mA)

-15

Input type

TTL-Compatible CMOS

Output type

3-State

Features

Over-voltage tolerant inputs, Very high speed (tpd 5-10ns)

Rating

Catalog

Operating temperature range (°C)

0 to 70

PDIP (N)

20

228.702 mm² 24.33 x 9.4

SOIC (DW)

20

131.84 mm² 12.8 x 10.3

BiCMOS Technology With Low Quiescent Power
Buffered Inputs
Noninverted Outputs
Input/Output Isolation From V_CC
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

BiCMOS Technology With Low Quiescent Power
Buffered Inputs
Noninverted Outputs
Input/Output Isolation From V_CC
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

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 V_CC. 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 V_CC 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 V_CCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

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 V_CC. 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 V_CC 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 V_CCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

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