What should be done with unused inputs to a TTL NAND gate?

More Questions from Logic Families and Their Characteristics

• What is the difference between the 74HC00 series and the 74HCT00 series of CMOS logic?
• The word "interfacing" as applied to digital electronics usually means:
• The problem of different current requirements when CMOS logic circuits are driving TTL logic circuits can usually be overcome by the addition of:
• What is the major advantage of ECL logic?
• Interfacing (74HCMOS to 74ALSTTl or 74TTL to 74LSTTL) can be done with no danger.
• The AND is the simplest of the gates, requiring the least amount of circuitry to implement in TTL.
• Propagation delay in TTL is due to slow switching speeds.
• A pulse is not perfectly square; it takes time for the digital level to rise from 0 up to 1 and to fall from 1 down to 0.
• In TTL the noise margin is between 0.8 V and 0.4 V.
• PMOS and NMOS are commonly used for small memories and microprocessors.

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