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CD74FCT240M
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Product Detailed Parameters
- Description：IC BUFF/LINE DRVR OCT 3-ST 20SOP
- Series：74FCT
- Mfr：Texas Instruments
- Package：Tube
- Logic Type：Inverter
- Number of Elements：-
- Number of Bits per Element：-
- Input Type：-
- Output Type：-
- Current - Output High, Low：15mA, 64mA
- Voltage - Supply：4.75V ~ 5.25V
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Package / Case：20-SOIC (0.295", 7.50mm Width)
- Supplier Device Package：20-SOIC
- Grade：-
- Qualification：-
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Overview
The CD74FCT240M is an octal buffer/line driver with 3-state outputs manufactured by Texas Instruments. It utilizes BiCMOS technology and operates within a supply voltage range of 4.75 V to 5.25 V. The device features inverted outputs, a propagation delay (tpd) of 8 ns maximum from input A to output Y at 25°C, and a low-level output sink current (IOL) capability of 64 mA. It is characterized for operation in free-air temperatures ranging from 0°C to 70°C.
Feature Summary
- BiCMOS technology provides buffered inputs and limits the output high level to two diode drops below VCC to reduce power-bus ringing.
- Controlled output edge rates minimize VCC bounce and ground bounce effects during simultaneous output switching.
- SCR latch-up-resistant process ensures robust performance under static conditions.
Applications
- Octal bus buffering applications requiring 3-state control
- Line driving for high-speed digital interfaces
- System architectures needing inverted signal transmission
Procurement Notes
Verify the specific package marking against the datasheet to confirm the M suffix corresponds to the Plastic Small-Outline package. Ensure the operating environment remains within the specified 0°C to 70°C temperature range. Confirm that unused inputs are tied to VCC or GND to maintain proper device operation as required by the recommended operating conditions.
Selection Notes
Select this component when an octal buffer with inverted logic and 3-state outputs is required. The BiCMOS technology offers a balance of speed and low quiescent power. Consider the 64 mA sink current capability for driving heavy loads. Verify compatibility with the 4.75 V to 5.25 V supply voltage requirements of the target system.
Part Context
This part belongs to the FCT logic family, designed for high-speed CMOS-compatible operations. The CD74FCT240 variant specifically provides octal buffering with inversion. The 'M' designation indicates the Plastic Small-Outline package option available for this series.
Replacement Considerations
Public confirmed substitute part numbers: None identified in source material.
FAQ
How does the BiCMOS technology affect the output voltage swing?
The output stages limit the output high level to two diode drops below VCC, resulting in a swing of approximately 0 V to 3.7 V.
What is the function of the OE pin?
The active-low output-enable (OE) inputs control the state of the outputs. When OE is low, data passes from inputs to outputs; when high, outputs enter a high-impedance state.
