Logic Families and Their Characteristics Questions

• The problem of interfacing IC logic families that have different supply voltages (VCC's) can be solved by using a:
• Why is the operating frequency for CMOS devices critical for determining power dissipation?
• Which of the following logic families has the shortest propagation delay?
• PMOS and NMOS ________.
• The problem of the VOH(min) of a TTL IC being too low to drive a CMOS circuit and meet the CMOS requirement of VIH(min) is usually easily overcome by:
• Which family of devices has the characteristic of preventing saturation during operation?
• Which of the following summarizes the important features of emitter-coupled logic (ECL)?
• Why is a decoupling capacitor needed for TTL ICs and where should it be connected?
• An open collector output can ________ current, but it cannot ________.
• The TTL HIGH level source current is higher than the LOW level sinking current.
• The most common TTL series ICs are:
• The rise time (tr) is the time it takes for a pulse to rise from its ________ point up to its ________ point. The fall time (tf) is the length of time it takes to fall from the ________ to the ________ point.
• Ten TTL loads per TTL driver is known as:
• Why is a pull-up resistor needed for an open collector gate?
• If all inputs to a TTL NAND gate are low, what is the ON, OFF condition of each transistor in the circuit?
• Assume that a particular IC has a supply voltage (Vcc) equal to +5 V and ICCH = 10 mA and ICCL = 23 mA. What is the power dissipation for the chip?
• Fan-out is determined by taking the ________ result(s) of ________.
• Why is a pull-up resistor needed when connecting TTL logic to CMOS logic?
• The output current capability of a single 7400 NAND gate when HIGH is called ________.
• What should be done to unused inputs on TTL gates?