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74HCT140
The 74HCT14 datasheet provides detailed information on the hex inverting Schmitt trigger74HCT140
The 74HCT14 datasheet provides detailed information on the hex inverting Schmitt trigger
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74HCT140 數據表
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詳細說明
Octal 3-State Inverting Buffer/Line Driver/Line Receiver with LSTTL-Compatible InputsHigh–Performance Silicon–Gate CMOSThe MC74HCT240A is identical in pinout to the LS240. This device may be used as a level converter for interfacing TTL or NMOS outputs to High–Speed CMOS inputs. The HCT240A is an octal inverting buffer line driver line receiver designed to be used with 3–state memory address drivers, clock drivers, and other bus–oriented systems. The device has inverting outputs and two active–low output enables.The HCT240A is the inverting version of the HCT244. See also HCT241.• Output Drive Capability: 15 LSTTL Loads• TTL NMOS–Compatible Input Levels• Outputs Directly Interface to CMOS, NMOS, and TTL• Operating Voltage Range: 4.5 to 5.5 V• Low Input Current: 1 µA• In Compliance with the Requirements Defined by JEDEC Standard No. 7A• Chip Complexity: 110 FETs or 27.5 Equivalent Gates
規格
以下是所選零件的基本參數，涉及零件的特性及其所屬類別。
| Manufacturer | Texas Instruments | Product Category ! | IC Chips |
常見問題解答
What is 74HCT140?
The 74HCT140 is a high-speed CMOS (Complementary Metal-Oxide-Semiconductor) dual 4-input NAND gate IC (Integrated Circuit) designed for digital logic applications. It is ideal for logic synthesis, arithmetic functions, and other digital processing tasks.
How Does 74HCT140 Work?
The 74HCT140 functions as a dual 4-input NAND gate, where each gate has four inputs and one output. It performs logical NAND operations on the input signals, producing the corresponding output based on the truth table of a NAND gate. The IC operates at high speed and is compatible with TTL (Transistor-Transistor Logic) inputs.
How Many Pins does 74HCT140 have and What are the Functions of the Pinout Configuration?
The 74HCT140 is typically available in a 14-pin DIP (Dual Inline Package) or SOIC (Small Outline Integrated Circuit) package. The pinout configuration includes:
- GND: Ground connection.
- VCC: Positive power supply pin.
- IN1A, IN2A, IN3A, IN4A: Inputs for NAND gate A.
- OUTA: Output of NAND gate A.
- IN1B, IN2B, IN3B, IN4B: Inputs for NAND gate B.
- OUTB: Output of NAND gate B.
What are the Pros and Cons of 74HCT140?
Pros:
- High Speed: Operates at high speed, suitable for time-critical logic operations.
- Low Power Consumption: Consumes low power, enhancing energy efficiency.
- Dual Gates: Features two separate NAND gates in a single IC package, offering flexibility in logic design.
- Wide Operating Voltage Range: Compatible with a broad range of supply voltages.
Cons:
- Propagation Delay: May have a non-zero propagation delay, affecting timing in synchronous circuits.
- Complex Logic Design: Requires understanding of digital logic principles for proper implementation.
- Input Voltage Levels: Compatibility with TTL inputs may require level shifting in certain applications.
Are There Any Equivalents/Alternatives to 74HCT140 for Recommendation?
- The 74HC20 also offers dual 4-input NAND gates but with slightly different characteristics.
- Alternatives to the 74HCT140 include the CD4012 and CD4023 series from different manufacturers.
