Digital Electronics-Integrated-CircuitLogic Families
Digital Electronics-Integrated-CircuitLogic Families
21. Generally, the voltage measured at an unused TTL input would typically be measured between:
- 1.4 to 1.8 V.
- 0 to 5 V.
- 0 to 1.8 V.
- 0.8 to 5 V.
22. The IEEE/ANSI notation of an internal underlined diamond denotes:
- totem-pole outputs.
- open-collector outputs.
- quadrature amplifiers.
- tristate buffers.
23. The bipolar TTL logic family that was developed to increase switching speed by preventing transistor saturation is:
- emitter-coupled logic (ECL).
- current-mode logic (CML).
- transistor-transistor logic (TTL).
- emitter-coupled logic (ECL) and transistor-transistor logic (TTL).
24. The major advantage of TTL logic circuits over CMOS is lower propagation delay.
- TRUE
- FALSE
25. The data sheet for the 74 series of TTL ICs shows that Vcc has a range of 4.5 V to 5.5 V.
- TRUE
- FALSE
26. The major advantage of CMOS logic circuits over TTL is very low power consumption.
- TRUE
- FALSE
27. The dc noise margins calculated using the proper values from a standard TTL data sheet are the worst-case margins. The typical dc noise margins are usually somewhat higher.
- TRUE
- FALSE
28. The principal advantage of MOS ICs over TTL ICs is their fast operating speed.
- TRUE
- FALSE
29. The CMOS series that is pin-compatible with the TTL family is the 4000 series.
- TRUE
- FALSE
30. The TTL HIGH level source current is higher than the LOW level sinking current.
- TRUE
- FALSE